/* roulang page: index */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-live-red);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section--light {
            background-color: var(--color-bg-light);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }

        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }

        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .section--dark .section__label {
            color: var(--color-warm-orange);
        }

        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }

        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }

        .section__title--large {
            font-size: 2.5rem;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            transition: var(--transition-base);
            white-space: nowrap;
            text-align: center;
            letter-spacing: 0.01em;
        }

        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
            box-shadow: 0 4px 14px rgba(229, 57, 53, 0.35);
        }

        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            color: var(--color-white);
            box-shadow: 0 6px 20px rgba(229, 57, 53, 0.45);
            transform: translateY(-2px);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(229, 57, 53, 0.3);
        }

        .btn--outline {
            background-color: transparent;
            color: var(--color-text-primary);
            border: 2px solid var(--color-charcoal);
        }

        .btn--outline:hover {
            background-color: rgba(229, 57, 53, 0.08);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            transform: translateY(-2px);
        }

        .btn--outline-light {
            background-color: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255, 255, 255, 0.6);
        }

        .btn--outline-light:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: var(--color-white);
            color: var(--color-white);
            transform: translateY(-2px);
        }

        .btn--lg {
            padding: 16px 32px;
            font-size: 1.05rem;
        }

        .btn--sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            line-height: 1.5;
            background-color: rgba(229, 57, 53, 0.08);
            color: var(--color-live-red);
        }

        .tag--cyan {
            background-color: rgba(0, 196, 180, 0.08);
            color: #008F82;
        }

        .tag--orange {
            background-color: rgba(245, 166, 35, 0.12);
            color: #B87810;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            background-color: var(--color-charcoal-lighter);
            color: var(--color-text-on-dark);
            letter-spacing: 0.01em;
        }

        .live-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-live-red);
            position: relative;
            flex-shrink: 0;
        }

        .live-dot::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px solid rgba(229, 57, 53, 0.4);
            animation: livePulse 1.8s ease-out infinite;
        }

        @keyframes livePulse {
            0% {
                transform: scale(0.6);
                opacity: 1;
            }
            100% {
                transform: scale(1.4);
                opacity: 0;
            }
        }

        .card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition-smooth);
            position: relative;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: #D0D3D9;
        }

        .card--with-stripe {
            border-left: 4px solid var(--color-live-red);
        }

        .card--with-stripe:hover {
            border-left-color: var(--color-live-red-dark);
        }

        .card__body {
            padding: var(--spacing-md);
        }

        .card__title {
            font-size: 1.15rem;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: var(--spacing-xs);
            color: var(--color-text-primary);
        }

        .card__title a:hover {
            color: var(--color-live-red);
        }

        .card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card__meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: var(--spacing-xs);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .card__image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background-color: var(--color-bg-light);
        }

        .grid {
            display: grid;
            gap: var(--spacing-md);
        }

        .grid--2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .grid--6 {
            grid-template-columns: repeat(6, 1fr);
        }

        /* Header & Navigation */
        .site-header {
            background-color: var(--color-charcoal);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
            transition: var(--transition-base);
        }

        .site-header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--spacing-md);
            height: 64px;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

        .site-logo__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .site-logo:hover {
            color: var(--color-white);
            opacity: 0.9;
        }

        .site-logo__text {
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .site-logo__main {
            font-weight: 700;
            font-size: 1.1rem;
        }

        .site-logo__sub {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.05em;
        }

        .primary-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            height: 100%;
        }

        .primary-nav__item {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }

        .primary-nav__link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 0 14px;
            height: 100%;
            color: var(--color-text-on-dark-muted);
            font-size: 0.92rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            border-bottom: 2px solid transparent;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .primary-nav__link:hover {
            color: var(--color-white);
            border-bottom-color: rgba(255, 255, 255, 0.3);
        }

        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            border-bottom-color: var(--color-live-red);
            font-weight: 600;
        }

        .primary-nav__link .arrow {
            font-size: 0.7rem;
            transition: transform 0.2s ease;
        }

        .primary-nav__item:hover .primary-nav__link .arrow {
            transform: rotate(180deg);
        }

        .nav-dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 200px;
            background-color: var(--color-charcoal-light);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 100;
            overflow: hidden;
            border: 1px solid var(--color-border-dark);
            border-top: none;
        }

        .primary-nav__item:hover .nav-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-dropdown__link {
            display: block;
            padding: 10px 16px;
            color: var(--color-text-on-dark-muted);
            font-size: 0.85rem;
            line-height: 1.5;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition-base);
        }

        .nav-dropdown__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
            padding-left: 20px;
        }

        .nav-dropdown__link:last-child {
            border-bottom: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            background-color: transparent;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-dark);
        }

        .nav-toggle__bar {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-toggle--open .nav-toggle__bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle--open .nav-toggle__bar:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle--open .nav-toggle__bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background-color: var(--color-charcoal);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
            z-index: 999;
            max-height: calc(100vh - 64px);
            overflow-y: auto;
            padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
        }

        .mobile-nav--open {
            display: block;
            animation: slideDown 0.25s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .mobile-nav__link {
            display: block;
            padding: 12px 0;
            color: var(--color-text-on-dark);
            font-size: 1rem;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            letter-spacing: 0.02em;
        }

        .mobile-nav__link:hover {
            color: var(--color-white);
            padding-left: 8px;
        }

        .mobile-nav__link--active {
            color: var(--color-live-red);
            font-weight: 600;
        }

        /* Hero Section */
        .hero {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: var(--spacing-xxl) 0;
        }

        .hero__bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/e429da76f26c7f2d.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(22, 24, 29, 0.95) 0%, rgba(22, 24, 29, 0.75) 50%, rgba(22, 24, 29, 0.5) 100%);
            z-index: 1;
        }

        .hero__content {
            position: relative;
            z-index: 2;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .hero__text {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .hero__live-row {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.06em;
        }

        .hero__title {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin: 0;
        }

        .hero__title .highlight {
            color: var(--color-live-red);
            position: relative;
        }

        .hero__title .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 3px;
            background-color: var(--color-live-red);
            border-radius: 2px;
            opacity: 0.5;
        }

        .hero__subtitle {
            font-size: 1.1rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.75;
            max-width: 540px;
        }

        .hero__actions {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            margin-top: var(--spacing-xs);
        }

        .hero__stats {
            display: flex;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-md);
            flex-wrap: wrap;
        }

        .hero__stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero__stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-white);
            line-height: 1.2;
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
        }

        .hero__stat-value .unit {
            font-size: 0.9rem;
            font-weight: 400;
            color: var(--color-text-on-dark-muted);
            margin-left: 2px;
        }

        .hero__stat-label {
            font-size: 0.82rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.04em;
        }

        .hero__visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .hero__image-wrap {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
            border: 1px solid var(--color-border-dark);
            position: relative;
        }

        .hero__image-wrap img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .hero__image-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            z-index: 2;
        }

        /* Category Entry */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .category-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            padding: var(--spacing-lg) var(--spacing-md);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background-color: var(--color-live-red);
            opacity: 0;
            transition: var(--transition-base);
        }

        .category-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: #D0D3D9;
        }

        .category-card:hover::before {
            opacity: 1;
        }

        .category-card__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background-color: rgba(229, 57, 53, 0.08);
            color: var(--color-live-red);
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
        }

        .category-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            line-height: 1.4;
        }

        .category-card__desc {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        .category-card__link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-live-red);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
            padding-top: var(--spacing-xs);
        }

        .category-card__link:hover {
            color: var(--color-live-red-dark);
            gap: 8px;
        }

        /* Trend Insight */
        .trend-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .trend-content {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .trend-item {
            padding: var(--spacing-sm) 0;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .trend-item:last-child {
            border-bottom: none;
        }

        .trend-item__title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .trend-item__dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--color-live-red);
            flex-shrink: 0;
            display: inline-block;
        }

        .trend-item__text {
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .trend-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            position: relative;
        }

        .trend-image-wrap img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        /* Article List */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .article-list__item {
            display: flex;
            gap: var(--spacing-md);
            padding: var(--spacing-sm) var(--spacing-md);
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-live-red);
            transition: var(--transition-base);
            align-items: flex-start;
        }

        .article-list__item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateX(4px);
            border-left-color: var(--color-live-red-dark);
        }

        .article-list__index {
            font-family: var(--font-mono);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-live-red);
            flex-shrink: 0;
            width: 32px;
            text-align: center;
            line-height: 1.5;
        }

        .article-list__body {
            flex: 1;
        }

        .article-list__title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            line-height: 1.5;
            margin-bottom: 4px;
        }

        .article-list__title a:hover {
            color: var(--color-live-red);
        }

        .article-list__excerpt {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Scenario Matrix */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
        }

        .scenario-tile {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            padding: var(--spacing-md);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
        }

        .scenario-tile:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #D0D3D9;
        }

        .scenario-tile__icon {
            font-size: 1.6rem;
            line-height: 1;
            margin-bottom: var(--spacing-xs);
        }

        .scenario-tile__name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
        }

        .scenario-tile__desc {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* Strategy Steps */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .step-item {
            display: flex;
            gap: var(--spacing-md);
            padding: var(--spacing-md);
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            align-items: flex-start;
        }

        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .step-item__num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background-color: var(--color-charcoal);
            color: var(--color-white);
            font-weight: 700;
            font-size: 0.95rem;
            flex-shrink: 0;
            font-family: var(--font-mono);
        }

        .step-item__title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 4px;
        }

        .step-item__text {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
        }

        /* Brand Intro */
        .brand-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .brand-content {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .brand-content p {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        .brand-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }

        .brand-image-wrap img {
            width: 100%;
            aspect-ratio: 5 / 4;
            object-fit: cover;
        }

        /* Equipment */
        .equip-layout {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: var(--spacing-xl);
            align-items: start;
        }

        .equip-guide {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.8;
            padding: var(--spacing-md);
            background-color: var(--color-bg-light);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
        }

        .equip-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-sm);
        }

        .equip-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            padding: var(--spacing-md);
            border: 1px solid var(--color-border);
            border-top: 3px solid var(--color-signal-cyan);
            transition: var(--transition-base);
        }

        .equip-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .equip-card__name {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .equip-card__dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-signal-cyan);
            flex-shrink: 0;
        }

        .equip-card__desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Case cards */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .case-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
        }

        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .case-card__image-wrap {
            position: relative;
            overflow: hidden;
        }

        .case-card__image-wrap img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover .case-card__image-wrap img {
            transform: scale(1.04);
        }

        .case-card__body {
            padding: var(--spacing-md);
        }

        .case-card__title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .case-card__result {
            font-size: 0.88rem;
            color: var(--color-signal-cyan);
            font-weight: 600;
            margin-bottom: var(--spacing-xs);
        }

        .case-card__text {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* Data Section */
        .data-section {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xxl) 0;
        }

        .data-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .data-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-sm);
        }

        .data-metric {
            text-align: center;
            padding: var(--spacing-md);
            background-color: var(--color-charcoal-light);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-dark);
        }

        .data-metric__value {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--color-white);
            font-family: var(--font-mono);
            line-height: 1.3;
            letter-spacing: -0.02em;
        }

        .data-metric__value .unit {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            font-weight: 400;
        }

        .data-metric__label {
            font-size: 0.82rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.04em;
            margin-top: 4px;
        }

        .data-chart-placeholder {
            background-color: var(--color-charcoal-light);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border-dark);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .data-chart-placeholder__bars {
            display: flex;
            align-items: flex-end;
            gap: 12px;
            height: 160px;
            width: 100%;
            max-width: 300px;
            justify-content: center;
        }

        .data-chart-placeholder__bar {
            width: 28px;
            border-radius: 4px 4px 0 0;
            background-color: var(--color-live-red);
            transition: height 0.5s ease;
            position: relative;
        }

        .data-chart-placeholder__bar:nth-child(1) { height: 35%; background-color: var(--color-live-red); opacity: 0.5; }
        .data-chart-placeholder__bar:nth-child(2) { height: 55%; background-color: var(--color-live-red); opacity: 0.65; }
        .data-chart-placeholder__bar:nth-child(3) { height: 45%; background-color: var(--color-live-red); opacity: 0.55; }
        .data-chart-placeholder__bar:nth-child(4) { height: 70%; background-color: var(--color-live-red); opacity: 0.75; }
        .data-chart-placeholder__bar:nth-child(5) { height: 85%; background-color: var(--color-live-red); opacity: 0.9; }
        .data-chart-placeholder__bar:nth-child(6) { height: 100%; background-color: var(--color-signal-cyan); }

        .data-chart-placeholder__caption {
            font-size: 0.82rem;
            color: var(--color-text-on-dark-muted);
            text-align: center;
        }

        /* Compliance */
        .compliance-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-sm);
        }

        .compliance-item {
            display: flex;
            gap: 12px;
            padding: var(--spacing-md);
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            align-items: flex-start;
        }

        .compliance-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .compliance-item__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(0, 196, 180, 0.1);
            color: #008F82;
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .compliance-item__title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 2px;
        }

        .compliance-item__text {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* Interactive Play */
        .play-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-sm);
        }

        .play-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            padding: var(--spacing-md);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            text-align: center;
        }

        .play-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #D0D3D9;
        }

        .play-card__emoji {
            font-size: 1.8rem;
            margin-bottom: var(--spacing-xs);
            display: block;
        }

        .play-card__name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 4px;
        }

        .play-card__desc {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* Team Tags */
        .team-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .team-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 24px;
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-primary);
            transition: var(--transition-base);
            letter-spacing: 0.02em;
        }

        .team-tag:hover {
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            background-color: var(--color-card-bg);
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: #D0D3D9;
        }

        .faq-item--open {
            border-color: var(--color-live-red);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 16px 20px;
            background-color: var(--color-bg-light);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            text-align: left;
            gap: 12px;
            letter-spacing: 0.01em;
            transition: var(--transition-base);
        }

        .faq-item__question:hover {
            background-color: #ECEDF0;
        }

        .faq-item--open .faq-item__question {
            background-color: rgba(229, 57, 53, 0.06);
            color: var(--color-live-red);
        }

        .faq-item__icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            font-weight: 700;
            transition: transform 0.3s ease;
            color: var(--color-text-muted);
            line-height: 1;
        }

        .faq-item--open .faq-item__icon {
            transform: rotate(45deg);
            color: var(--color-live-red);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item--open .faq-item__answer {
            max-height: 400px;
            padding: 16px 20px 20px;
        }

        .faq-item__answer p {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        /* News Update */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            padding: 14px 20px;
            background-color: var(--color-card-bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateX(4px);
            border-left: 3px solid var(--color-live-red);
        }

        .news-item__title {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-primary);
            flex: 1;
            line-height: 1.5;
        }

        .news-item__title a:hover {
            color: var(--color-live-red);
        }

        .news-item__date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        /* CTA / Subscribe */
        .cta-section {
            background-color: var(--color-bg-light);
            padding: var(--spacing-xxl) 0;
        }

        .cta-box {
            background-color: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card-hover);
            padding: var(--spacing-xl);
            max-width: 640px;
            margin: 0 auto;
            border: 1px solid var(--color-border);
            text-align: center;
        }

        .cta-box__title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: var(--spacing-xs);
            line-height: 1.35;
        }

        .cta-box__text {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
        }

        .cta-form {
            display: flex;
            gap: var(--spacing-xs);
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form__input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            background-color: var(--color-white);
            color: var(--color-text-primary);
            transition: var(--transition-base);
            outline: none;
        }

        .cta-form__input:focus {
            border-color: var(--color-live-red);
            box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.08);
        }

        .cta-form__input::placeholder {
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            font-size: 0.88rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand__name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: var(--spacing-xs);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand__logo {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .footer-brand__desc {
            color: var(--color-text-on-dark-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col__title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.05em;
        }

        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col__links a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.85rem;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .footer-col__links a:hover {
            color: var(--color-white);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border-dark);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
        }

        .footer-copyright {
            color: var(--color-text-on-dark-muted);
            font-size: 0.82rem;
            letter-spacing: 0.03em;
        }

        .footer-icp {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.03em;
        }

        .footer-icp a {
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .footer-icp a:hover {
            color: var(--color-white);
        }

        .footer-links-extra {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
        }

        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .footer-links-extra a:hover {
            color: var(--color-white);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .primary-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .hero__content {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .hero__visual {
                order: -1;
                max-width: 480px;
                margin: 0 auto;
                width: 100%;
            }
            .hero {
                min-height: auto;
                padding: var(--spacing-xl) 0;
            }
            .hero__title {
                font-size: 2.2rem;
            }
            .trend-layout,
            .brand-layout {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .equip-layout {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .data-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-lg) 0;
            }
            .section__title {
                font-size: 1.5rem;
            }
            .section__title--large {
                font-size: 1.75rem;
            }
            .hero__title {
                font-size: 1.8rem;
            }
            .hero__subtitle {
                font-size: 1rem;
            }
            .hero__stats {
                gap: var(--spacing-md);
            }
            .hero__stat-value {
                font-size: 1.4rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .compliance-list {
                grid-template-columns: 1fr;
            }
            .play-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .equip-cards {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .data-metrics {
                grid-template-columns: 1fr;
                gap: var(--spacing-xs);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .article-list__item {
                flex-direction: column;
                gap: var(--spacing-xs);
                padding: var(--spacing-sm);
            }
            .article-list__index {
                width: auto;
                text-align: left;
            }
            .news-item {
                flex-direction: column;
                gap: 4px;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .section__title {
                font-size: 1.3rem;
            }
            .hero__title {
                font-size: 1.5rem;
            }
            .hero__subtitle {
                font-size: 0.92rem;
            }
            .btn {
                padding: 12px 20px;
                font-size: 0.88rem;
                width: 100%;
                justify-content: center;
            }
            .btn--lg {
                padding: 14px 24px;
            }
            .hero__actions {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .play-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .compliance-item {
                flex-direction: column;
            }
            .cta-form {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .cta-form__input {
                min-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }
        }

/* roulang page: category2 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-live-red);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section--light {
            background-color: var(--color-bg-light);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }

        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }

        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .section--dark .section__label {
            color: var(--color-warm-orange);
        }

        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }

        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }

        .section__title--large {
            font-size: 2.5rem;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-base);
            border: 2px solid transparent;
        }

        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
        }

        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(229, 57, 53, 0.3);
        }

        .btn--outline {
            border-color: var(--color-charcoal);
            color: var(--color-charcoal);
            background-color: transparent;
        }

        .btn--outline:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
        }

        .btn--sm {
            padding: 10px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .btn--lg {
            padding: 16px 32px;
            font-size: 1.05rem;
        }

        /* Header & Nav */
        .site-header {
            background-color: var(--color-charcoal);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding-top: var(--spacing-sm);
            padding-bottom: var(--spacing-sm);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.2rem;
            letter-spacing: 0.01em;
        }

        .brand__logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 1rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            flex-shrink: 0;
        }

        .brand:hover {
            color: var(--color-white);
            opacity: 0.9;
        }

        .primary-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .primary-nav__item {
            position: relative;
        }

        .primary-nav__link {
            display: inline-block;
            padding: 8px 12px;
            color: var(--color-text-on-dark-muted);
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.01em;
            border-bottom: 2px solid transparent;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .primary-nav__link:hover {
            color: var(--color-white);
        }

        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            border-bottom-color: var(--color-live-red);
        }

        .primary-nav__link .arrow {
            font-size: 0.7rem;
            margin-left: 4px;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-sm);
        }

        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 1px;
            transition: var(--transition-base);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--color-bg-light);
            border-bottom: 1px solid var(--color-border);
            padding: var(--spacing-sm) 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li+li::before {
            content: '›';
            color: var(--color-text-muted);
            font-size: 1rem;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
        }

        .breadcrumb a:hover {
            color: var(--color-live-red);
        }

        .breadcrumb .current {
            color: var(--color-text-primary);
            font-weight: 600;
        }

        /* Category hero */
        .category-header {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }

        .category-header::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(229, 57, 53, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-header h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: -0.01em;
            margin-bottom: var(--spacing-sm);
        }

        .category-header .category-header__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(229, 57, 53, 0.12);
            color: var(--color-live-red);
            border: 1px solid rgba(229, 57, 53, 0.25);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
        }

        .category-header .category-header__badge .live-dot {
            width: 7px;
            height: 7px;
            background-color: var(--color-live-red);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.4);
            }
            50% {
                opacity: 0.8;
                box-shadow: 0 0 0 6px rgba(229, 57, 53, 0);
            }
        }

        .category-header .category-header__desc {
            font-size: 1.05rem;
            color: var(--color-text-on-dark-muted);
            max-width: 720px;
        }

        /* Intro section */
        .intro-text {
            font-size: 1rem;
            color: var(--color-text-secondary);
            line-height: 1.9;
            margin-bottom: var(--spacing-md);
        }

        .intro-text strong {
            color: var(--color-text-primary);
        }

        /* Article list cards */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .article-card {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-signal-cyan);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-left-color: var(--color-live-red);
        }

        .article-card__body {
            flex: 1;
        }

        .article-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .article-card__title a {
            color: inherit;
        }

        .article-card__title a:hover {
            color: var(--color-live-red);
        }

        .article-card__meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }

        .article-card__meta .tag {
            display: inline-block;
            background-color: rgba(0, 196, 180, 0.1);
            color: #00857a;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
            font-size: 0.75rem;
        }

        .article-card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* Featured cards */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .featured-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card__img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--color-charcoal-light);
        }

        .featured-card__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .featured-card:hover .featured-card__img img {
            transform: scale(1.04);
        }

        .featured-card__body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card__title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .featured-card__excerpt {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .featured-card__link {
            display: inline-block;
            margin-top: var(--spacing-sm);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-live-red);
        }

        /* Stats banner */
        .stats-banner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
            background-color: var(--color-charcoal);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            color: var(--color-text-on-dark);
        }

        .stats-banner__item {
            text-align: center;
        }

        .stats-banner__number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-signal-cyan);
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .stats-banner__label {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-xs);
        }

        .tag-cloud a {
            display: inline-block;
            padding: 6px 14px;
            border: 1px solid var(--color-border);
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            background-color: var(--color-card-bg);
            transition: var(--transition-base);
        }

        .tag-cloud a:hover {
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            background-color: rgba(229, 57, 53, 0.04);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            margin-bottom: var(--spacing-sm);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background-color: var(--color-card-bg);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: var(--spacing-md);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            text-align: left;
            gap: var(--spacing-sm);
        }

        .faq-item__question .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--color-live-red);
            font-size: 1.2rem;
            transition: var(--transition-base);
        }

        .faq-item__answer {
            display: none;
            padding: var(--spacing-md);
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-top: 1px solid var(--color-border);
        }

        .faq-item.is-open .faq-item__answer {
            display: block;
        }

        .faq-item.is-open .faq-icon {
            transform: rotate(45deg);
        }

        /* CTA form */
        .cta-box {
            background-color: var(--color-charcoal);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            color: var(--color-text-on-dark);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
        }

        .cta-box__title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
        }

        .cta-box__desc {
            font-size: 0.95rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .cta-form input {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-dark);
            background-color: var(--color-charcoal-light);
            color: var(--color-text-on-dark);
            transition: var(--transition-base);
            font-size: 0.9rem;
        }

        .cta-form input::placeholder {
            color: var(--color-text-on-dark-muted);
        }

        .cta-form input:focus {
            border-color: var(--color-live-red);
            outline: none;
        }

        .cta-form .btn {
            align-self: flex-start;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            background-color: var(--color-live-red);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 700;
        }

        .footer-brand__desc {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.7;
        }

        .footer-col__title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }

        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-col__links a {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
        }

        .footer-col__links a:hover {
            color: var(--color-live-red);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
            font-size: 0.8rem;
            color: var(--color-text-on-dark-muted);
        }

        .footer-icp {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .footer-icp a {
            color: var(--color-text-on-dark-muted);
        }

        .footer-icp a:hover {
            color: var(--color-live-red);
        }

        .footer-links-extra {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
        }

        .footer-links-extra a:hover {
            color: var(--color-live-red);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-hamburger {
                display: flex;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 0;
                padding-top: var(--spacing-sm);
            }
            .primary-nav.is-open {
                display: flex;
            }
            .primary-nav__item {
                border-bottom: 1px solid var(--color-border-dark);
            }
            .primary-nav__link {
                padding: 12px 0;
                display: block;
                border-bottom: none;
            }
            .primary-nav__item--active .primary-nav__link {
                border-bottom: none;
                color: var(--color-live-red);
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-box {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-lg) 0;
            }
            .category-header h1 {
                font-size: 1.8rem;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .stats-banner {
                grid-template-columns: 1fr;
                padding: var(--spacing-md);
            }
            .stats-banner__number {
                font-size: 1.8rem;
            }
            .article-card {
                flex-direction: column;
                padding: var(--spacing-sm);
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            html {
                font-size: 14px;
            }
            .section__title {
                font-size: 1.5rem;
            }
            .section__title--large {
                font-size: 1.8rem;
            }
            .category-header h1 {
                font-size: 1.5rem;
            }
            .cta-box {
                padding: var(--spacing-md);
            }
            .btn {
                padding: 12px 20px;
                font-size: 0.85rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                flex-wrap: wrap;
            }
        }

/* roulang page: category1 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
            --category-accent: #00C4B4;
            --category-accent-rgb: 0, 196, 180;
            --category-accent-dark: #009e91;
            --category-accent-light: #e6faf7;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-live-red);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section--light {
            background-color: var(--color-bg-light);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }

        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--category-accent);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }

        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--category-accent);
            border-radius: 1px;
        }

        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }

        .section__title--large {
            font-size: 2.5rem;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
            box-shadow: 0 4px 12px rgba(229, 57, 53, 0.25);
        }

        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            color: var(--color-white);
            box-shadow: 0 6px 16px rgba(229, 57, 53, 0.35);
            transform: translateY(-1px);
        }

        .btn--secondary {
            background-color: transparent;
            color: var(--color-text-primary);
            border: 1px solid var(--color-border);
        }

        .btn--secondary:hover {
            background-color: #feebea;
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            transform: translateY(-1px);
        }

        .btn--outline-light {
            background-color: transparent;
            color: var(--color-white);
            border: 1px solid var(--color-border-dark);
        }

        .btn--outline-light:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: var(--color-white);
            color: var(--color-white);
        }

        /* Navigation */
        .site-header {
            background-color: var(--color-charcoal);
            border-bottom: 1px solid var(--color-charcoal-lighter);
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
        }

        .site-header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: var(--radius-md);
            letter-spacing: 0;
        }

        .brand__text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }

        .brand__name {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--color-white);
            letter-spacing: 0.02em;
        }

        .brand__sub {
            font-size: 0.7rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.04em;
        }

        .primary-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .primary-nav__item {
            position: relative;
        }

        .primary-nav__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 10px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-on-dark);
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
        }

        .primary-nav__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            font-weight: 600;
        }

        .primary-nav__item--active .primary-nav__link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .arrow {
            font-size: 0.7rem;
            opacity: 0.7;
            transition: transform 0.2s ease;
        }

        .primary-nav__item:hover .arrow {
            transform: rotate(180deg);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 1px;
            transition: var(--transition-base);
        }

        .hamburger--active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger--active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger--active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: var(--spacing-sm) 0;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            font-size: 0.85rem;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
            color: var(--color-text-muted);
        }

        .breadcrumb__item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb__item:not(:last-child)::after {
            content: '/';
            color: var(--color-border);
        }

        .breadcrumb__link {
            color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .breadcrumb__link:hover {
            color: var(--color-live-red);
        }

        .breadcrumb__current {
            color: var(--color-text-primary);
            font-weight: 500;
        }

        /* Category Hero */
        .cat-hero {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: clamp(32px, 6vw, 64px) 0;
            position: relative;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 196, 180, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cat-hero__inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-md);
        }

        .cat-hero__title {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-white);
            letter-spacing: -0.01em;
            margin-bottom: var(--spacing-sm);
        }

        .cat-hero__title .highlight {
            color: var(--category-accent);
            position: relative;
        }

        .cat-hero__desc {
            font-size: 1.05rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.8;
            max-width: 820px;
            margin-bottom: 0;
        }

        .cat-hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(229, 57, 53, 0.15);
            color: var(--color-live-red);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: var(--spacing-sm);
        }

        .cat-hero__badge-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background-color: var(--color-live-red);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        /* Article Cards List */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .article-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--category-accent);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: var(--spacing-md);
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-left-color: var(--category-accent-dark);
        }

        .article-card__content {
            flex: 1;
            min-width: 0;
        }

        .article-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
            transition: var(--transition-base);
        }

        .article-card:hover .article-card__title {
            color: var(--category-accent-dark);
        }

        .article-card__meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-card__meta-dot {
            width: 3px;
            height: 3px;
            background-color: var(--color-text-muted);
            border-radius: 50%;
            display: inline-block;
        }

        .article-card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card__arrow {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: var(--category-accent-light);
            color: var(--category-accent);
            font-size: 1.2rem;
            transition: var(--transition-base);
        }

        .article-card:hover .article-card__arrow {
            background-color: var(--category-accent);
            color: var(--color-white);
            transform: translateX(4px);
        }

        /* Featured Cards */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .featured-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .featured-card__image {
            position: relative;
            height: 180px;
            overflow: hidden;
            background-color: var(--color-charcoal-light);
        }

        .featured-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .featured-card:hover .featured-card__image img {
            transform: scale(1.05);
        }

        .featured-card__tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            z-index: 2;
        }

        .featured-card__body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card__title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .featured-card__desc {
            font-size: 0.87rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: var(--spacing-sm);
            flex: 1;
        }

        .featured-card__link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--category-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .featured-card__link:hover {
            color: var(--category-accent-dark);
            gap: 8px;
        }

        /* Data Banner */
        .data-banner {
            background-color: var(--color-charcoal);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            align-items: center;
            justify-content: space-between;
        }

        .data-banner__item {
            flex: 1;
            min-width: 150px;
            text-align: center;
        }

        .data-banner__number {
            font-size: 2.2rem;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--category-accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .data-banner__label {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            margin-top: 4px;
        }

        .data-banner__divider {
            width: 1px;
            height: 48px;
            background-color: var(--color-border-dark);
            flex-shrink: 0;
        }

        /* Topic Tags */
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .topic-tag:hover {
            background-color: var(--category-accent-light);
            border-color: var(--category-accent);
            color: var(--category-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(0, 196, 180, 0.12);
        }

        .topic-tag__dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            background-color: var(--category-accent);
            border-radius: 50%;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--category-accent);
        }

        .faq-item__question {
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            transition: var(--transition-base);
            user-select: none;
            gap: 12px;
        }

        .faq-item__question:hover {
            color: var(--category-accent-dark);
        }

        .faq-item__icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-text-muted);
            transition: var(--transition-base);
            font-weight: 400;
        }

        .faq-item--open .faq-item__icon {
            transform: rotate(45deg);
            color: var(--category-accent);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .faq-item--open .faq-item__answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--color-charcoal);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
        }

        .cta-section__text {
            flex: 1;
            min-width: 280px;
        }

        .cta-section__title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 4px;
        }

        .cta-section__desc {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            margin-bottom: 0;
        }

        .cta-section__form {
            flex: 1;
            min-width: 280px;
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .cta-section__input {
            flex: 1;
            padding: 13px 18px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-dark);
            background-color: var(--color-charcoal-light);
            color: var(--color-white);
            font-size: 0.9rem;
            transition: var(--transition-base);
            min-width: 0;
        }

        .cta-section__input::placeholder {
            color: var(--color-text-on-dark-muted);
        }

        .cta-section__input:focus {
            outline: none;
            border-color: var(--category-accent);
            background-color: var(--color-charcoal-lighter);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            border-top: 1px solid var(--color-charcoal-lighter);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-sm);
        }

        .footer-brand__desc {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-col__title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }

        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col__links a {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .footer-col__links a:hover {
            color: var(--color-live-red);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-charcoal-lighter);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-on-dark-muted);
        }

        .footer-copyright {
            margin: 0;
        }

        .footer-icp {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .footer-icp a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
            transition: var(--transition-base);
        }

        .footer-icp a:hover {
            color: var(--color-text-on-dark);
        }

        .footer-links-extra {
            display: flex;
            gap: var(--spacing-sm);
        }

        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
        }

        .footer-links-extra a:hover {
            color: var(--color-text-on-dark);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hamburger {
                display: flex;
            }

            .primary-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--color-charcoal);
                flex-direction: column;
                align-items: stretch;
                padding: var(--spacing-sm);
                gap: 2px;
                border-bottom: 1px solid var(--color-charcoal-lighter);
                display: none;
                z-index: 999;
                max-height: 70vh;
                overflow-y: auto;
            }

            .primary-nav--open {
                display: flex;
            }

            .primary-nav__link {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
                display: flex;
                justify-content: space-between;
            }

            .primary-nav__item--active .primary-nav__link::after {
                display: none;
            }

            .primary-nav__item--active .primary-nav__link {
                background-color: rgba(229, 57, 53, 0.12);
                color: var(--color-live-red);
            }

            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-xl: 40px;
                --spacing-lg: 32px;
            }

            .section {
                padding: var(--spacing-lg) 0;
            }

            .section__title {
                font-size: 1.5rem;
            }

            .section__title--large {
                font-size: 1.8rem;
            }

            .article-card {
                flex-direction: column;
                padding: 16px 18px;
            }

            .article-card__arrow {
                align-self: flex-end;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .featured-card__image {
                height: 200px;
            }

            .data-banner {
                padding: var(--spacing-md);
                gap: var(--spacing-md);
            }

            .data-banner__number {
                font-size: 1.6rem;
            }

            .data-banner__divider {
                display: none;
            }

            .data-banner__item {
                min-width: 100px;
            }

            .cta-section {
                flex-direction: column;
                align-items: flex-start;
                padding: var(--spacing-md);
            }

            .cta-section__form {
                width: 100%;
                flex-direction: column;
            }

            .cta-section__input {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .cat-hero__title {
                font-size: 1.7rem;
            }

            .cat-hero__desc {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-md: 16px;
                --spacing-sm: 12px;
                --spacing-xs: 6px;
            }

            body {
                font-size: 14px;
            }

            .container {
                padding: 0 16px;
            }

            .section__title {
                font-size: 1.35rem;
            }

            .section__title--large {
                font-size: 1.55rem;
            }

            .cat-hero__title {
                font-size: 1.5rem;
            }

            .cat-hero__desc {
                font-size: 0.9rem;
                line-height: 1.7;
            }

            .btn {
                padding: 12px 20px;
                font-size: 0.88rem;
                width: 100%;
            }

            .article-card {
                padding: 14px 16px;
            }

            .article-card__title {
                font-size: 1rem;
            }

            .article-card__excerpt {
                font-size: 0.85rem;
            }

            .topic-tag {
                padding: 6px 14px;
                font-size: 0.78rem;
            }

            .faq-item__question {
                padding: 13px 16px;
                font-size: 0.92rem;
            }

            .faq-item__answer {
                font-size: 0.85rem;
                padding: 0 16px;
            }

            .faq-item--open .faq-item__answer {
                padding: 0 16px 14px;
            }

            .cta-section__title {
                font-size: 1.1rem;
            }

            .brand__text {
                display: none;
            }
        }

/* roulang page: category4 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-live-red);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section--light {
            background-color: var(--color-bg-light);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }

        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }

        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .section--dark .section__label {
            color: var(--color-warm-orange);
        }

        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }

        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }

        .section__title--large {
            font-size: 2.5rem;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid transparent;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
            border-color: var(--color-live-red);
        }

        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            border-color: var(--color-live-red-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(229, 57, 53, 0.35);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(229, 57, 53, 0.25);
        }

        .btn--secondary {
            background-color: transparent;
            color: var(--color-text-primary);
            border-color: var(--color-charcoal);
        }

        .btn--secondary:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            transform: translateY(-2px);
        }

        .btn--outline-light {
            background-color: transparent;
            color: var(--color-white);
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn--outline-light:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: var(--color-white);
            color: var(--color-white);
        }

        .btn--sm {
            padding: 10px 20px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .btn--lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        /* Header & Navigation */
        .site-header {
            background-color: var(--color-charcoal);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: wrap;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-white);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .site-logo:hover {
            color: var(--color-white);
        }

        .site-logo__mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background-color: var(--color-live-red);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }

        .site-logo__text {
            line-height: 1.2;
        }

        .site-logo__sub {
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.06em;
        }

        .primary-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .primary-nav__item {
            position: relative;
        }

        .primary-nav__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 10px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-on-dark-muted);
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .primary-nav__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            background-color: rgba(229, 57, 53, 0.15);
        }

        .primary-nav__item--active .primary-nav__link::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: -1px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px 1px 0 0;
        }

        .arrow {
            font-size: 0.7rem;
            transition: transform 0.25s ease;
        }

        .primary-nav__item:hover .arrow {
            transform: rotate(180deg);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.6rem;
            padding: 8px;
            line-height: 1;
            border-radius: var(--radius-sm);
        }

        .nav-toggle:hover {
            background-color: rgba(255, 255, 255, 0.08);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li+li::before {
            content: '/';
            color: var(--color-text-muted);
            font-size: 0.8rem;
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--color-live-red);
        }

        .breadcrumb .current {
            color: var(--color-text-primary);
            font-weight: 600;
        }

        /* Category Hero - different from homepage hero, compact header area */
        .category-head {
            background-color: var(--color-charcoal);
            color: var(--color-white);
            padding: var(--spacing-lg) 0;
            position: relative;
            overflow: hidden;
        }

        .category-head::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: linear-gradient(135deg, rgba(229, 57, 53, 0.12) 0%, rgba(0, 196, 180, 0.06) 50%, transparent 100%);
            pointer-events: none;
        }

        .category-head .container {
            position: relative;
            z-index: 1;
        }

        .category-head__h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .category-head__h1 .highlight {
            color: var(--color-live-red);
        }

        .category-head__desc {
            font-size: 1rem;
            color: var(--color-text-on-dark-muted);
            max-width: 680px;
            line-height: 1.7;
        }

        .category-head__meta {
            display: flex;
            gap: var(--spacing-md);
            margin-top: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .category-head__meta-item {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-live-red);
            animation: pulse-dot 2s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.5); }
            50% { opacity: 0.75; box-shadow: 0 0 0 6px rgba(229, 57, 53, 0); }
        }

        /* Category intro */
        .category-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: start;
        }

        .category-intro p {
            margin-bottom: var(--spacing-sm);
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        .category-intro p:last-child {
            margin-bottom: 0;
        }

        /* Article list */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .article-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-warm-orange);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition-smooth);
            position: relative;
        }

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-left-color: var(--color-live-red);
        }

        .article-card__title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: var(--transition-base);
        }

        .article-card:hover .article-card__title {
            color: var(--color-live-red);
        }

        .article-card__meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .article-card__meta .tag {
            display: inline-block;
            padding: 2px 10px;
            font-size: 0.7rem;
            font-weight: 600;
            border-radius: 20px;
            background-color: rgba(245, 166, 35, 0.12);
            color: var(--color-warm-orange);
        }

        .article-card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Featured cards */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .featured-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 196, 180, 0.3);
        }

        .featured-card__img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background-color: var(--color-charcoal-lighter);
        }

        .featured-card__body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card__title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: var(--transition-base);
        }

        .featured-card:hover .featured-card__title {
            color: var(--color-live-red);
        }

        .featured-card__desc {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
            flex: 1;
        }

        .featured-card__link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-live-red);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Data banner */
        .data-banner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
            background-color: var(--color-charcoal);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-md);
            text-align: center;
        }

        .data-banner__item {
            color: var(--color-text-on-dark);
        }

        .data-banner__value {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-signal-cyan);
            line-height: 1.2;
            font-family: var(--font-mono);
        }

        .data-banner__label {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            margin-top: 6px;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud__item {
            display: inline-block;
            padding: 8px 18px;
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: 24px;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .tag-cloud__item:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(0, 196, 180, 0.3);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-sm) var(--spacing-md);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: var(--spacing-sm);
        }

        .faq-item__question:hover {
            background-color: rgba(0, 196, 180, 0.04);
        }

        .faq-item__icon {
            font-size: 1.3rem;
            color: var(--color-text-muted);
            transition: var(--transition-base);
            flex-shrink: 0;
            line-height: 1;
        }

        .faq-item.open .faq-item__icon {
            transform: rotate(45deg);
            color: var(--color-live-red);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 0 var(--spacing-md);
        }

        .faq-item.open .faq-item__answer {
            max-height: 280px;
        }

        .faq-item__answer-inner {
            padding: 0 0 var(--spacing-md) 0;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-top: 1px solid var(--color-border);
            padding-top: var(--spacing-sm);
        }

        /* CTA */
        .cta-section {
            background-color: var(--color-bg-light);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border);
        }

        .cta-section__inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
        }

        .cta-section__title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-primary);
            line-height: 1.3;
            margin-bottom: var(--spacing-xs);
        }

        .cta-section__desc {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: var(--spacing-xs);
            flex-wrap: wrap;
        }

        .cta-form input {
            flex: 1;
            min-width: 180px;
            padding: 12px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--color-text-primary);
            background-color: var(--color-white);
            transition: var(--transition-base);
        }

        .cta-form input:focus {
            border-color: var(--color-live-red);
            outline: none;
            box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.08);
        }

        .cta-form input::placeholder {
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark-muted);
            padding: var(--spacing-xl) 0 var(--spacing-md) 0;
            margin-top: var(--spacing-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background-color: var(--color-live-red);
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
        }

        .footer-brand__desc {
            font-size: 0.85rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col__title {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.04em;
        }

        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col__links a {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .footer-col__links a:hover {
            color: var(--color-white);
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
        }

        .footer-copyright {
            color: var(--color-text-on-dark-muted);
        }

        .footer-icp {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .footer-icp a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
        }

        .footer-icp a:hover {
            color: var(--color-white);
        }

        .footer-links-extra {
            display: flex;
            gap: var(--spacing-sm);
        }

        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
        }

        .footer-links-extra a:hover {
            color: var(--color-white);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --spacing-xl: 48px;
                --spacing-xxl: 56px;
            }

            .section {
                padding: var(--spacing-lg) 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }

            .category-head__h1 {
                font-size: 1.8rem;
            }

            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-banner {
                grid-template-columns: repeat(3, 1fr);
                gap: var(--spacing-sm);
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-lg: 32px;
                --spacing-xl: 40px;
            }

            .site-header .container {
                flex-wrap: nowrap;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                margin-left: auto;
            }

            .primary-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--color-charcoal-light);
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                padding: var(--spacing-sm) var(--spacing-md);
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                z-index: 999;
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
            }

            .primary-nav.is-open {
                display: flex;
            }

            .primary-nav__link {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }

            .primary-nav__item--active .primary-nav__link::after {
                display: none;
            }

            .primary-nav__item--active .primary-nav__link {
                background-color: rgba(229, 57, 53, 0.2);
                color: var(--color-white);
            }

            .arrow {
                display: none;
            }

            .category-intro {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }

            .category-head__h1 {
                font-size: 1.5rem;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .data-banner {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
                padding: var(--spacing-md);
            }

            .cta-section__inner {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }
        }

        @media (max-width: 480px) {
            :root {
                --spacing-md: 16px;
                --spacing-lg: 28px;
                --spacing-xl: 32px;
            }

            .section__title {
                font-size: 1.5rem;
            }

            .section__title--large {
                font-size: 1.8rem;
            }

            .site-logo {
                font-size: 1rem;
            }

            .site-logo__mark {
                width: 28px;
                height: 28px;
                font-size: 0.85rem;
            }

            .category-head__h1 {
                font-size: 1.3rem;
            }

            .category-head__desc {
                font-size: 0.9rem;
            }

            .article-card {
                padding: var(--spacing-sm);
            }

            .article-card__title {
                font-size: 1rem;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form .btn {
                width: 100%;
            }

            .btn {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category3 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-live-red);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }
        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }
        .section--light {
            background-color: var(--color-bg-light);
        }
        .section--white {
            background-color: var(--color-white);
        }
        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }
        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }
        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }
        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }
        .section--dark .section__label {
            color: var(--color-warm-orange);
        }
        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }
        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }
        .section__title--large {
            font-size: 2.5rem;
        }
        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }
        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            transition: var(--transition-base);
            text-align: center;
            white-space: nowrap;
        }
        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
            border: 2px solid var(--color-live-red);
        }
        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            border-color: var(--color-live-red-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(229, 57, 53, 0.3);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--outline {
            background-color: transparent;
            color: var(--color-text-primary);
            border: 2px solid var(--color-text-primary);
        }
        .btn--outline:hover {
            background-color: var(--color-live-red);
            border-color: var(--color-live-red);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .btn--outline-light {
            background-color: transparent;
            color: var(--color-text-on-dark);
            border: 2px solid var(--color-border-dark);
        }
        .btn--outline-light:hover {
            background-color: rgba(229, 57, 53, 0.15);
            border-color: var(--color-live-red);
            color: var(--color-white);
        }
        .btn--disabled,
        .btn[disabled] {
            background-color: #C5C8CE;
            border-color: #C5C8CE;
            color: #F0F1F3;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
            pointer-events: none;
        }
        /* 头部导航 */
        .site-header {
            background-color: var(--color-charcoal);
            border-bottom: 1px solid var(--color-border-dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
            transition: var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-logo__mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-live-red), #B71C1C);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-white);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .header-logo__text {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }
        .header-logo__name {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.01em;
        }
        .header-logo__name span {
            color: var(--color-live-red);
        }
        .header-logo__sub {
            font-size: 0.72rem;
            color: var(--color-text-on-dark-muted);
            letter-spacing: 0.05em;
            font-weight: 400;
        }
        .primary-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .primary-nav__item {
            position: relative;
        }
        .primary-nav__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 10px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-on-dark-muted);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }
        .primary-nav__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
        }
        .primary-nav__link .arrow {
            font-size: 0.65rem;
            opacity: 0.7;
            transition: var(--transition-base);
        }
        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            font-weight: 600;
        }
        .primary-nav__item--active .primary-nav__link::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 16px;
            right: 16px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            padding: 10px;
            background: transparent;
            border: none;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-text-on-dark);
            border-radius: 1px;
            transition: var(--transition-base);
            transform-origin: center;
        }
        .nav-toggle[aria-expanded='true'] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle[aria-expanded='true'] span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle[aria-expanded='true'] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* 移动端导航 */
        .primary-nav--mobile {
            display: none;
            flex-direction: column;
            align-items: flex-start;
            padding: var(--spacing-sm) var(--spacing-md);
            background-color: var(--color-charcoal-light);
            border-top: 1px solid var(--color-border-dark);
            gap: 4px;
        }
        .primary-nav--mobile .primary-nav__link {
            display: flex;
            width: 100%;
            padding: 12px 16px;
            font-size: 1rem;
            color: var(--color-text-on-dark-muted);
        }
        .primary-nav--mobile .primary-nav__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
        }
        .primary-nav--mobile .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
            font-weight: 600;
        }
        .primary-nav--mobile .primary-nav__item--active .primary-nav__link::after {
            display: none;
        }
        /* 面包屑 */
        .breadcrumb-section {
            background-color: var(--color-charcoal);
            padding: var(--spacing-md) 0;
            border-bottom: 1px solid var(--color-border-dark);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li + li::before {
            content: '/';
            color: var(--color-border-dark);
            font-size: 0.8rem;
            margin-right: 4px;
        }
        .breadcrumb a {
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--color-white);
        }
        .breadcrumb .current {
            color: var(--color-text-on-dark);
            font-weight: 500;
        }
        /* 分类页头 */
        .category-hero {
            background-color: var(--color-charcoal);
            padding: var(--spacing-lg) 0 var(--spacing-xl) 0;
            color: var(--color-text-on-dark);
        }
        .category-hero__inner {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .category-hero__content {
            flex: 1;
            min-width: 300px;
        }
        .category-hero__title {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-white);
            letter-spacing: -0.015em;
            margin-bottom: var(--spacing-sm);
        }
        .category-hero__title .highlight {
            color: var(--color-live-red);
        }
        .category-hero__desc {
            font-size: 1.05rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.75;
            max-width: 680px;
        }
        .category-hero__stat {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
            min-width: 220px;
        }
        .category-hero__stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background-color: var(--color-charcoal-light);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            transition: var(--transition-base);
        }
        .category-hero__stat-item:hover {
            border-color: var(--color-live-red);
            background-color: var(--color-charcoal-lighter);
        }
        .category-hero__stat-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
            background-color: rgba(229, 57, 53, 0.15);
            color: var(--color-live-red);
        }
        .category-hero__stat-text {
            display: flex;
            flex-direction: column;
            line-height: 1.4;
        }
        .category-hero__stat-num {
            font-size: 1.4rem;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-warm-orange);
            letter-spacing: -0.01em;
        }
        .category-hero__stat-label {
            font-size: 0.8rem;
            color: var(--color-text-on-dark-muted);
        }
        /* 文章列表卡片 */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .article-card {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-warm-orange);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            position: relative;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-left-color: var(--color-live-red);
        }
        .article-card__date {
            flex-shrink: 0;
            width: 72px;
            text-align: center;
            background-color: var(--color-bg-light);
            border-radius: var(--radius-sm);
            padding: 8px 4px;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.4;
        }
        .article-card__date .day {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-text-primary);
            display: block;
        }
        .article-card__date .month {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .article-card__body {
            flex: 1;
            min-width: 0;
        }
        .article-card__title {
            font-size: 1.15rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text-primary);
            margin-bottom: 6px;
            transition: var(--transition-base);
        }
        .article-card__title a {
            color: inherit;
        }
        .article-card__title a:hover {
            color: var(--color-live-red);
        }
        .article-card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card__tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 500;
            color: var(--color-warm-orange);
            background-color: rgba(245, 166, 35, 0.1);
            padding: 2px 10px;
            border-radius: 20px;
            margin-top: 8px;
            letter-spacing: 0.03em;
        }
        /* 精选推荐 */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .featured-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .featured-card__image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            border-radius: 0;
        }
        .featured-card__body {
            padding: var(--spacing-md);
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .featured-card__label {
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--color-live-red);
            margin-bottom: 6px;
            text-transform: uppercase;
        }
        .featured-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text-primary);
            margin-bottom: 8px;
        }
        .featured-card__title a:hover {
            color: var(--color-live-red);
        }
        .featured-card__excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            flex: 1;
        }
        /* 数据横幅 */
        .data-banner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .data-banner__item {
            text-align: center;
            padding: var(--spacing-md);
            background-color: var(--color-charcoal-light);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
        }
        .data-banner__item:hover {
            border-color: var(--color-warm-orange);
        }
        .data-banner__num {
            font-size: 2.2rem;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-warm-orange);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .data-banner__label {
            font-size: 0.88rem;
            color: var(--color-text-on-dark-muted);
            margin-top: 8px;
        }
        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud__item {
            display: inline-block;
            padding: 8px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            background-color: var(--color-bg-light);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            transition: var(--transition-base);
        }
        .tag-cloud__item:hover {
            background-color: var(--color-live-red);
            border-color: var(--color-live-red);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(229, 57, 53, 0.25);
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 820px;
        }
        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            background-color: var(--color-card-bg);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: #D0D3D9;
        }
        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            user-select: none;
            transition: var(--transition-base);
        }
        .faq-item__question:hover {
            background-color: #EDEFF2;
        }
        .faq-item__question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: var(--transition-base);
        }
        .faq-item[open] .faq-item__question .faq-icon {
            transform: rotate(45deg);
            background-color: var(--color-live-red);
            border-color: var(--color-live-red);
            color: var(--color-white);
        }
        .faq-item__answer {
            padding: 0 20px 20px 20px;
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            background-color: var(--color-card-bg);
        }
        /* CTA 订阅区 */
        .cta-subscribe {
            background-color: var(--color-charcoal);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-md);
            color: var(--color-text-on-dark);
            text-align: center;
        }
        .cta-subscribe__title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 8px;
        }
        .cta-subscribe__desc {
            font-size: 0.95rem;
            color: var(--color-text-on-dark-muted);
            margin-bottom: var(--spacing-md);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-subscribe__form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-subscribe__input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border-radius: var(--radius-xs);
            border: 1px solid var(--color-border-dark);
            background-color: var(--color-charcoal-light);
            color: var(--color-text-on-dark);
            font-size: 0.95rem;
            transition: var(--transition-base);
        }
        .cta-subscribe__input::placeholder {
            color: var(--color-text-on-dark-muted);
        }
        .cta-subscribe__input:focus {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-color: var(--color-live-red);
            background-color: var(--color-charcoal-lighter);
        }
        .cta-subscribe__btn {
            padding: 14px 28px;
            border-radius: var(--radius-xs);
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--color-live-red);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .cta-subscribe__btn:hover {
            background-color: var(--color-live-red-dark);
            border-color: var(--color-live-red-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(229, 57, 53, 0.3);
        }
        /* 页脚 */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark-muted);
            padding: var(--spacing-xl) 0 var(--spacing-md) 0;
            border-top: 1px solid var(--color-border-dark);
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .footer-brand__logo {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--color-white);
            font-weight: 700;
            flex-shrink: 0;
        }
        .footer-brand__desc {
            font-size: 0.85rem;
            line-height: 1.7;
            color: var(--color-text-on-dark-muted);
            max-width: 320px;
        }
        .footer-col__title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-on-dark);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col__links a {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }
        .footer-col__links a:hover {
            color: var(--color-white);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
        }
        .footer-copyright {
            font-size: 0.8rem;
            color: var(--color-text-on-dark-muted);
        }
        .footer-icp {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
        }
        .footer-icp a {
            color: var(--color-text-on-dark-muted);
        }
        .footer-icp a:hover {
            color: var(--color-white);
        }
        .footer-links-extra {
            display: flex;
            gap: 12px;
            font-size: 0.8rem;
        }
        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
        }
        .footer-links-extra a:hover {
            color: var(--color-white);
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-toggle {
                display: flex;
            }
            .primary-nav--desktop {
                display: none;
            }
            .primary-nav--mobile {
                display: flex;
            }
            .site-header .container {
                height: 64px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero__title {
                font-size: 2.2rem;
            }
            .category-hero__inner {
                flex-direction: column;
            }
            .category-hero__stat {
                flex-direction: row;
                flex-wrap: wrap;
                width: 100%;
                min-width: auto;
            }
            .category-hero__stat-item {
                flex: 1;
                min-width: 180px;
            }
        }
        @media (max-width: 768px) {
            .site-header .container {
                height: 60px;
                padding: 0 var(--spacing-sm);
            }
            .primary-nav--mobile {
                padding: var(--spacing-xs) var(--spacing-sm);
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
            .section__title {
                font-size: 1.6rem;
            }
            .section__title--large {
                font-size: 1.9rem;
            }
            .category-hero {
                padding: var(--spacing-md) 0 var(--spacing-lg) 0;
            }
            .category-hero__title {
                font-size: 1.8rem;
            }
            .category-hero__desc {
                font-size: 0.95rem;
            }
            .category-hero__stat {
                gap: 10px;
            }
            .category-hero__stat-item {
                padding: 10px 14px;
            }
            .category-hero__stat-num {
                font-size: 1.15rem;
            }
            .article-card {
                flex-direction: column;
                gap: 12px;
                padding: 16px 18px;
            }
            .article-card__date {
                width: auto;
                display: flex;
                align-items: baseline;
                gap: 6px;
                text-align: left;
                background-color: transparent;
                padding: 0;
            }
            .article-card__date .day {
                font-size: 1.1rem;
                display: inline;
            }
            .article-card__date .month {
                font-size: 0.75rem;
            }
            .article-card__title {
                font-size: 1.05rem;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .data-banner {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-subscribe__form {
                flex-direction: column;
            }
            .cta-subscribe__input {
                width: 100%;
                min-width: auto;
            }
            .cta-subscribe__btn {
                width: 100%;
            }
            .tag-cloud__item {
                font-size: 0.8rem;
                padding: 6px 14px;
            }
        }
        @media (max-width: 520px) {
            :root {
                font-size: 14px;
            }
            .header-logo__name {
                font-size: 1.1rem;
            }
            .header-logo__mark {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .header-logo__sub {
                font-size: 0.65rem;
            }
            .category-hero__title {
                font-size: 1.5rem;
            }
            .section__title {
                font-size: 1.4rem;
            }
            .section__subtitle {
                font-size: 0.9rem;
            }
            .btn {
                padding: 12px 20px;
                font-size: 0.88rem;
            }
            .article-card__title {
                font-size: 0.98rem;
            }
            .article-card__excerpt {
                font-size: 0.82rem;
                -webkit-line-clamp: 3;
            }
            .category-hero__stat-item {
                min-width: 100%;
            }
            .category-hero__stat {
                flex-direction: column;
            }
            .faq-item__question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-item__answer {
                padding: 0 16px 16px 16px;
                font-size: 0.85rem;
            }
        }

/* roulang page: category5 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-live-red);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }
        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }
        .section--light {
            background-color: var(--color-bg-light);
        }
        .section--white {
            background-color: var(--color-white);
        }
        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }
        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }
        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }
        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }
        .section--dark .section__label {
            color: var(--color-warm-orange);
        }
        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }
        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
        }
        .section__title--large {
            font-size: 2.5rem;
        }
        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }
        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-base);
            line-height: 1.4;
        }
        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
        }
        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            color: var(--color-white);
            box-shadow: 0 4px 14px rgba(229, 57, 53, 0.35);
        }
        .btn--outline {
            border: 1.5px solid var(--color-charcoal);
            color: var(--color-charcoal);
            background: transparent;
        }
        .btn--outline:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
        }
        .btn--outline-light {
            border: 1.5px solid var(--color-border-dark);
            color: var(--color-text-on-dark);
            background: transparent;
        }
        .btn--outline-light:hover {
            border-color: var(--color-live-red);
            background-color: rgba(229, 57, 53, 0.1);
            color: var(--color-white);
        }
        .btn--sm {
            padding: 10px 18px;
            font-size: 0.85rem;
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        .primary-header {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            position: sticky;
            top: 0;
            z-index: 1050;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .primary-header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: var(--spacing-md);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-white);
            white-space: nowrap;
        }
        .brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .brand__suffix {
            font-size: 0.75rem;
            color: var(--color-text-on-dark-muted);
            font-weight: 400;
            margin-left: 2px;
        }
        .primary-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .primary-nav__item {
            position: relative;
        }
        .primary-nav__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 12px;
            color: var(--color-text-on-dark-muted);
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: var(--transition-base);
        }
        .primary-nav__link:hover {
            color: var(--color-white);
        }
        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
        }
        .primary-nav__item--active .primary-nav__link::after {
            content: '';
            position: absolute;
            left: 12px;
            right: 12px;
            bottom: -2px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }
        .arrow {
            font-size: 0.7rem;
            opacity: 0.7;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            background: transparent;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 1px;
            transition: var(--transition-base);
        }

        .breadcrumb-wrap {
            padding: var(--spacing-sm) 0;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--color-text-secondary);
        }
        .breadcrumb-nav a:hover {
            color: var(--color-live-red);
        }
        .breadcrumb-nav__sep {
            color: var(--color-border);
        }
        .breadcrumb-nav__current {
            color: var(--color-text-primary);
            font-weight: 500;
        }

        .page-hero-category {
            background-color: var(--color-white);
            padding: var(--spacing-lg) 0 var(--spacing-xl);
            border-bottom: 1px solid var(--color-border);
        }
        .page-hero-category__inner {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .page-hero-category__title {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--color-text-primary);
            margin: 0;
        }
        .page-hero-category__meta {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            align-items: center;
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }
        .page-hero-category__meta .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-live-red);
            display: inline-block;
            margin-right: 4px;
            animation: pulse-dot 1.8s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.4);
            }
        }
        .page-hero-category__intro {
            max-width: 860px;
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            line-height: 1.85;
        }
        .page-hero-category__intro p {
            margin-bottom: var(--spacing-sm);
        }

        .case-list-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-warm-orange);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            display: flex;
            gap: var(--spacing-md);
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .case-list-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-left-color: var(--color-live-red);
        }
        .case-list-card__thumb {
            flex-shrink: 0;
            width: 140px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background-color: var(--color-bg-light);
        }
        .case-list-card__thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-list-card__body {
            flex: 1;
            min-width: 0;
        }
        .case-list-card__title {
            font-size: 1.2rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 6px;
            color: var(--color-text-primary);
        }
        .case-list-card__title a:hover {
            color: var(--color-live-red);
        }
        .case-list-card__summary {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }
        .case-list-card__date {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            font-family: var(--font-mono);
        }

        .featured-card {
            background: var(--color-charcoal-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card-dark);
            transition: var(--transition-smooth);
            height: 100%;
        }
        .featured-card:hover {
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
            transform: translateY(-4px);
        }
        .featured-card__image {
            height: 180px;
            overflow: hidden;
        }
        .featured-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-card:hover .featured-card__image img {
            transform: scale(1.05);
        }
        .featured-card__body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .featured-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .featured-card__desc {
            font-size: 0.88rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.6;
            flex: 1;
        }
        .featured-card__tag {
            display: inline-block;
            background-color: rgba(229, 57, 53, 0.2);
            color: var(--color-live-red);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 20px;
            margin-bottom: 8px;
            width: fit-content;
        }

        .data-banner {
            background-color: var(--color-charcoal);
            border-radius: var(--radius-md);
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .data-banner__item {
            text-align: center;
            flex: 1;
            min-width: 120px;
        }
        .data-banner__number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-warm-orange);
            font-family: var(--font-mono);
            line-height: 1.2;
        }
        .data-banner__label {
            font-size: 0.85rem;
            color: var(--color-text-on-dark-muted);
            margin-top: 4px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud__link {
            padding: 8px 16px;
            border-radius: 20px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            font-size: 0.85rem;
            transition: var(--transition-base);
        }
        .tag-cloud__link:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
        }

        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-xs);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--color-live-red);
        }
        .faq-item__question {
            width: 100%;
            padding: var(--spacing-sm) var(--spacing-md);
            background: var(--color-white);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            gap: var(--spacing-sm);
        }
        .faq-item__question:hover {
            color: var(--color-live-red);
        }
        .faq-item__icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            font-weight: 400;
            color: var(--color-text-muted);
            transition: var(--transition-base);
        }
        .faq-item--open .faq-item__icon {
            transform: rotate(45deg);
            color: var(--color-live-red);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 var(--spacing-md);
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            background-color: var(--color-bg-light);
        }
        .faq-item--open .faq-item__answer {
            max-height: 300px;
            padding: var(--spacing-sm) var(--spacing-md);
        }

        .subscribe-card {
            background-color: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            box-shadow: var(--shadow-card);
        }
        .subscribe-card__title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-primary);
        }
        .subscribe-card__desc {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
        }
        .subscribe-form {
            display: flex;
            gap: var(--spacing-xs);
            flex-wrap: wrap;
            margin-top: var(--spacing-xs);
        }
        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border: 1px solid #D0D3D9;
            border-radius: var(--radius-sm);
            background-color: var(--color-white);
            color: var(--color-text-primary);
            font-size: 0.92rem;
        }
        .subscribe-form input:focus {
            outline: none;
            border-color: var(--color-live-red);
            box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.12);
        }
        .subscribe-form button:disabled {
            background-color: #A0A5B2;
            cursor: not-allowed;
        }

        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 0.7fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--color-white);
            margin-bottom: var(--spacing-xs);
        }
        .footer-brand__logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            color: var(--color-white);
            font-size: 0.9rem;
        }
        .footer-brand__desc {
            font-size: 0.88rem;
            color: var(--color-text-on-dark-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col__title {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.05em;
        }
        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col__links a {
            font-size: 0.88rem;
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }
        .footer-col__links a:hover {
            color: var(--color-live-red);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border-dark);
            font-size: 0.78rem;
            color: var(--color-text-on-dark-muted);
        }
        .footer-copyright {
            color: var(--color-text-on-dark-muted);
        }
        .footer-icp {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .footer-icp a {
            color: var(--color-text-on-dark-muted);
        }
        .footer-icp a:hover {
            color: var(--color-white);
        }
        .footer-links-extra {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
        }
        .footer-links-extra a:hover {
            color: var(--color-white);
        }

        @media (max-width: 1024px) {
            .primary-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background-color: var(--color-charcoal-light);
                flex-direction: column;
                align-items: flex-start;
                padding: var(--spacing-md);
                gap: var(--spacing-xs);
                border-bottom: 1px solid var(--color-border-dark);
            }
            .primary-nav--open {
                display: flex;
            }
            .primary-nav__item {
                width: 100%;
            }
            .primary-nav__link {
                width: 100%;
                padding: 12px;
                font-size: 1rem;
            }
            .primary-nav__item--active .primary-nav__link::after {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .page-hero-category__title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-xl: 48px;
                --spacing-lg: 36px;
                --spacing-md: 20px;
            }
            .section__title {
                font-size: 1.6rem;
            }
            .section__title--large {
                font-size: 1.9rem;
            }
            .page-hero-category__title {
                font-size: 1.8rem;
            }
            .case-list-card {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .case-list-card__thumb {
                width: 100%;
                height: 160px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .data-banner {
                flex-direction: column;
                text-align: center;
                padding: var(--spacing-md);
            }
            .data-banner__item {
                min-width: 100%;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input {
                min-width: 100%;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 14px;
            }
            .section__title {
                font-size: 1.4rem;
            }
            .page-hero-category__title {
                font-size: 1.6rem;
            }
            .section__subtitle {
                font-size: 0.92rem;
            }
            .btn {
                padding: 12px 20px;
                font-size: 0.88rem;
            }
            .breadcrumb-nav {
                font-size: 0.78rem;
            }
            .featured-card__image {
                height: 140px;
            }
        }

/* roulang page: category6 */
:root {
            --color-charcoal: #16181D;
            --color-charcoal-light: #1E2128;
            --color-charcoal-lighter: #2A2E37;
            --color-live-red: #E53935;
            --color-live-red-dark: #C62828;
            --color-signal-cyan: #00C4B4;
            --color-warm-orange: #F5A623;
            --color-bg-light: #F7F8FA;
            --color-card-bg: #FFFFFF;
            --color-border: #E6E8EC;
            --color-border-dark: #3A3F4A;
            --color-text-primary: #1A1D24;
            --color-text-secondary: #4A4F5A;
            --color-text-muted: #7A7F8C;
            --color-text-on-dark: #E8EAED;
            --color-text-on-dark-muted: #A0A5B2;
            --color-white: #FFFFFF;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-dark: 0 2px 12px rgba(0, 0, 0, 0.25);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-live-red);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-live-red);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section--light {
            background-color: var(--color-bg-light);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--dark {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
        }

        .section__header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-live-red);
            margin-bottom: var(--spacing-xs);
            position: relative;
            padding-left: 16px;
        }

        .section__label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .section--dark .section__label {
            color: var(--color-warm-orange);
        }

        .section--dark .section__label::before {
            background-color: var(--color-warm-orange);
        }

        .section__title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            letter-spacing: -0.01em;
            margin: 0;
        }

        .section__title--large {
            font-size: 2.5rem;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-sm);
            line-height: 1.7;
        }

        .section--dark .section__subtitle {
            color: var(--color-text-on-dark-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            transition: var(--transition-base);
            text-align: center;
        }

        .btn--primary {
            background-color: var(--color-live-red);
            color: var(--color-white);
        }

        .btn--primary:hover {
            background-color: var(--color-live-red-dark);
            color: var(--color-white);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(229, 57, 53, 0.3);
        }

        .btn--outline {
            background-color: transparent;
            color: var(--color-charcoal);
            border: 1.5px solid var(--color-charcoal);
        }

        .btn--outline:hover {
            background-color: rgba(229, 57, 53, 0.06);
            border-color: var(--color-live-red);
            color: var(--color-live-red);
        }

        .btn--sm {
            padding: 10px 20px;
            font-size: 0.875rem;
        }

        /* Header / Navigation */
        .site-header {
            background-color: var(--color-charcoal);
            position: sticky;
            top: 0;
            z-index: 1020;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .site-header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--spacing-md);
        }

        .site-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .site-brand__logo {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-live-red) 0%, #B71C1C 100%);
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 0.02em;
        }

        .site-brand__name {
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .site-brand__name a:hover {
            color: var(--color-text-on-dark);
        }

        .primary-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .primary-nav__item {
            position: relative;
        }

        .primary-nav__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 10px 16px;
            color: var(--color-text-on-dark-muted);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .primary-nav__link:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .primary-nav__item--active .primary-nav__link {
            color: var(--color-white);
        }

        .primary-nav__item--active .primary-nav__link::after {
            content: '';
            position: absolute;
            left: 16px;
            bottom: 4px;
            width: calc(100% - 32px);
            height: 2px;
            background-color: var(--color-live-red);
            border-radius: 1px;
        }

        .primary-nav__link .arrow {
            font-size: 0.7rem;
            transition: transform 0.25s ease;
        }

        .primary-nav__item:hover .primary-nav__link .arrow {
            transform: rotate(180deg);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            background-color: var(--color-charcoal-light);
            border-radius: var(--radius-sm);
            color: var(--color-white);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 1px;
            transition: var(--transition-base);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--color-charcoal);
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-on-dark-muted);
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li + li::before {
            content: '/';
            color: var(--color-border-dark);
        }

        .breadcrumb a {
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--color-white);
        }

        .breadcrumb .current {
            color: var(--color-warm-orange);
            font-weight: 500;
        }

        /* Page title area */
        .page-title-area {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            padding: 48px 0 56px;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .page-title-area h1 {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.25;
            margin: 0 0 12px;
            color: var(--color-white);
        }

        .page-title-area .page-title-desc {
            font-size: 1.1rem;
            color: var(--color-text-on-dark-muted);
            max-width: 680px;
            margin: 0;
            line-height: 1.7;
        }

        /* Card styles */
        .card-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-md);
        }

        .card-item {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .card-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background-color: var(--color-warm-orange);
            border-radius: 0 2px 2px 0;
        }

        .card-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: #D5D8DE;
        }

        .card-item__body {
            flex: 1;
            min-width: 0;
        }

        .card-item__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }

        .card-item__badge {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background-color: rgba(245, 166, 35, 0.12);
            color: #B8730A;
            letter-spacing: 0.03em;
        }

        .card-item__title {
            font-size: 1.15rem;
            font-weight: 600;
            line-height: 1.45;
            color: var(--color-text-primary);
            margin: 0 0 8px;
        }

        .card-item__title a {
            color: inherit;
            transition: var(--transition-base);
        }

        .card-item__title a:hover {
            color: var(--color-live-red);
        }

        .card-item__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-item__thumb {
            width: 160px;
            height: 110px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            margin-top: 6px;
        }

        /* Featured cards */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .featured-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card__thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .featured-card__body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .featured-card__tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-live-red);
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .featured-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.45;
            margin: 0;
        }

        .featured-card__title a {
            color: var(--color-text-primary);
        }

        .featured-card__title a:hover {
            color: var(--color-live-red);
        }

        .featured-card__excerpt {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }

        /* Data banner */
        .data-banner {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark);
            border-radius: var(--radius-lg);
            padding: 32px 40px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin: 0;
        }

        .data-banner__item {
            text-align: center;
        }

        .data-banner__value {
            font-size: 2.2rem;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-signal-cyan);
            line-height: 1.2;
        }

        .data-banner__label {
            font-size: 0.9rem;
            color: var(--color-text-on-dark-muted);
            margin-top: 6px;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-cloud a {
            display: inline-block;
            padding: 8px 18px;
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: 40px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .tag-cloud a:hover {
            color: var(--color-live-red);
            border-color: var(--color-live-red);
            background-color: rgba(229, 57, 53, 0.04);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: #D0D3D9;
        }

        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            background-color: var(--color-bg-light);
            text-align: left;
            transition: var(--transition-base);
        }

        .faq-item__question:hover {
            color: var(--color-live-red);
        }

        .faq-item__icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            position: relative;
            transition: transform 0.3s ease;
        }

        .faq-item__icon::before,
        .faq-item__icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            background-color: var(--color-text-secondary);
            transition: var(--transition-base);
        }

        .faq-item__icon::before {
            width: 14px;
            height: 2px;
            transform: translate(-50%, -50%);
        }

        .faq-item__icon::after {
            width: 2px;
            height: 14px;
            transform: translate(-50%, -50%);
        }

        .faq-item.open .faq-item__icon {
            transform: rotate(45deg);
        }

        .faq-item__answer {
            padding: 0 20px 20px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: none;
            border-top: 1px solid var(--color-border);
            padding-top: 16px;
            margin-top: 0;
        }

        .faq-item.open .faq-item__answer {
            display: block;
        }

        /* CTA form */
        .cta-panel {
            background-color: var(--color-bg-light);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .cta-panel__text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin: 0 0 12px;
        }

        .cta-panel__text p {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-wrap: wrap;
        }

        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border: 1.5px solid #D0D3D9;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--color-text-primary);
            background-color: var(--color-white);
            transition: var(--transition-base);
        }

        .cta-form input:focus {
            outline: none;
            border-color: var(--color-live-red);
            box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.1);
        }

        .cta-form input::placeholder {
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-charcoal);
            color: var(--color-text-on-dark-muted);
            padding: 56px 0 0;
            border-top: 1px solid var(--color-border-dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .footer-brand__name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 14px;
        }

        .footer-brand__logo {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-live-red);
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
        }

        .footer-brand__desc {
            font-size: 0.875rem;
            line-height: 1.7;
            color: var(--color-text-on-dark-muted);
            margin: 0;
            max-width: 360px;
        }

        .footer-col__title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
        }

        .footer-col__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col__links a {
            font-size: 0.875rem;
            color: var(--color-text-on-dark-muted);
            transition: var(--transition-base);
        }

        .footer-col__links a:hover {
            color: var(--color-white);
        }

        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--color-text-on-dark-muted);
        }

        .footer-bottom .footer-copyright {
            margin: 0;
        }

        .footer-icp {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-icp a {
            color: var(--color-text-on-dark-muted);
        }

        .footer-icp a:hover {
            color: var(--color-white);
        }

        .footer-links-extra {
            display: flex;
            gap: 16px;
        }

        .footer-links-extra a {
            color: var(--color-text-on-dark-muted);
            font-size: 0.8rem;
        }

        .footer-links-extra a:hover {
            color: var(--color-white);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-toggle {
                display: flex;
            }

            .primary-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--color-charcoal-light);
                border-bottom: 1px solid var(--color-border-dark);
                padding: 16px 24px;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
            }

            .primary-nav.open {
                display: flex;
            }

            .primary-nav__link {
                padding: 14px 16px;
                width: 100%;
                justify-content: space-between;
            }

            .primary-nav__item--active .primary-nav__link::after {
                left: 16px;
                bottom: 6px;
                width: 40px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 40px 0;
            }

            .section__title {
                font-size: 1.5rem;
            }

            .section__title--large {
                font-size: 1.8rem;
            }

            .page-title-area h1 {
                font-size: 1.8rem;
            }

            .card-list {
                grid-template-columns: 1fr;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .data-banner {
                grid-template-columns: 1fr;
                padding: 24px;
                gap: 20px;
            }

            .cta-panel {
                grid-template-columns: 1fr;
                padding: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .site-header__inner {
                height: 60px;
            }

            .primary-nav {
                top: 60px;
            }

            .site-brand__name {
                font-size: 1rem;
            }

            .site-brand__logo {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }

            .page-title-area {
                padding: 32px 0 40px;
            }

            .page-title-area h1 {
                font-size: 1.5rem;
            }

            .card-item {
                flex-direction: column;
            }

            .card-item__thumb {
                width: 100%;
                height: 160px;
            }

            .btn {
                padding: 12px 20px;
                font-size: 0.875rem;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}