/* roulang page: index */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-title);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-on-light);
            letter-spacing: -0.01em;
        }

        button, input, select, textarea {
            font-family: var(--font-body);
        }

        :focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

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

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

        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }

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

        .section-offset {
            background: #F1EEE8;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }

        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: #fff;
        }

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

        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .header-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.10);
        }

        .header-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .header-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(61, 217, 201, 0.35);
            border-radius: 999px;
            padding: 5px 14px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .chip-link:hover {
            background: rgba(61, 217, 201, 0.12);
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
            transform: translateY(-1px);
        }

        .chip-link .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-gold);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }

        .navbar-toggler {
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 8px 10px;
            background: transparent;
            color: #fff;
            font-size: 20px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.25);
            border-color: var(--accent-cyan);
        }

        .mobile-menu {
            display: none;
            background: var(--primary-deeper);
            border-top: 1px solid var(--border-soft);
            padding: 16px 0;
        }

        .mobile-menu.show {
            display: block;
        }

        .mobile-menu .mobile-nav-link {
            display: block;
            color: var(--text-on-dark);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 20px;
            border-radius: 8px;
            transition: all var(--transition-fast);
        }

        .mobile-menu .mobile-nav-link:hover,
        .mobile-menu .mobile-nav-link.active {
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.08);
        }

        .mobile-menu .mobile-chips {
            padding: 16px 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            border-top: 1px solid var(--border-soft);
            margin-top: 8px;
        }

        @media (max-width: 992px) {
            .header-nav {
                display: none;
            }
            .header-actions .chip-link {
                display: none;
            }
            .header-actions {
                gap: 0;
            }
        }

        @media (min-width: 993px) {
            .navbar-toggler {
                display: none;
            }
        }

        /* ==================== HERO ==================== */
        .hero-section {
            position: relative;
            background: var(--primary-deep);
            color: var(--text-on-dark);
            padding: 90px 0 80px;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/5a128bd477971418.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.32;
            z-index: 0;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 27, 45, 0.72) 0%, rgba(15, 27, 45, 0.88) 60%, var(--primary-deep) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(61, 217, 201, 0.12);
            border: 1px solid rgba(61, 217, 201, 0.3);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: 999px;
            margin-bottom: 22px;
        }

        .hero-content h1 {
            font-size: clamp(28px, 4.8vw, 52px);
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero-content .hero-subtitle {
            font-size: 17px;
            line-height: 1.85;
            color: rgba(237, 240, 244, 0.85);
            max-width: 680px;
            margin-bottom: 30px;
        }

        .hero-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .hero-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted-dark);
        }

        .hero-meta .meta-item i {
            color: var(--accent-cyan);
            font-size: 15px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn-cyan {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            font-weight: 700;
            border: none;
            border-radius: 10px;
            padding: 13px 28px;
            font-size: 15px;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-cyan:hover,
        .btn-cyan:focus {
            background: #4DE8D8;
            color: var(--primary-deep);
            transform: translateY(-1px) scale(1.02);
            box-shadow: 0 8px 24px rgba(61, 217, 201, 0.3);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 10px;
            padding: 13px 28px;
            font-size: 15px;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.45);
            transform: translateY(-1px);
        }

        .hero-side-panel {
            position: relative;
            z-index: 2;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-soft);
            border-radius: var(--card-radius-lg);
            padding: 28px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .hero-side-panel .panel-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-side-panel .panel-title i {
            color: var(--accent-gold);
        }

        .hero-side-panel .data-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-soft);
            font-size: 14px;
        }

        .hero-side-panel .data-row:last-child {
            border-bottom: none;
        }

        .hero-side-panel .data-row .label {
            color: var(--text-muted-dark);
        }

        .hero-side-panel .data-row .value {
            font-weight: 700;
            color: var(--accent-green);
            font-family: 'SF Mono', 'JetBrains Mono', 'Cascadia Code', monospace;
            font-size: 16px;
        }

        .hero-side-panel .data-row .value.gold {
            color: var(--accent-gold);
        }

        /* ==================== KPI DASHBOARD ==================== */
        .kpi-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius);
            padding: 26px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            height: 100%;
            box-shadow: var(--shadow-light);
        }

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

        .kpi-card .kpi-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary-deep);
            font-family: 'SF Mono', 'JetBrains Mono', 'Cascadia Code', monospace;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .kpi-card .kpi-number .unit {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-left: 2px;
        }

        .kpi-card .kpi-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted-light);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        /* ==================== SERVICE MATRIX ==================== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 18px;
        }

        .service-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius);
            padding: 28px 22px;
            transition: all var(--transition-smooth);
            height: 100%;
            box-shadow: var(--shadow-light);
            grid-column: span 2;
        }

        .service-card.wide {
            grid-column: span 3;
        }

        .service-card.tall {
            grid-column: span 3;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 217, 201, 0.3);
        }

        .service-card .service-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(61, 217, 201, 0.15), rgba(163, 230, 53, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary-deep);
        }

        .service-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        @media (max-width: 992px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-card,
            .service-card.wide,
            .service-card.tall {
                grid-column: span 1;
            }
        }

        @media (max-width: 576px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ==================== DEEP CONTENT ==================== */
        .deep-content {
            max-width: 860px;
            margin: 0 auto;
        }

        .deep-content h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--primary-deep);
        }

        .deep-content p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 18px;
        }

        .deep-content .highlight-block {
            background: #fff;
            border-left: 4px solid var(--accent-cyan);
            border-radius: 0 var(--card-radius) var(--card-radius) 0;
            padding: 24px 28px;
            margin: 24px 0;
            box-shadow: var(--shadow-light);
        }

        .deep-content .highlight-block p {
            margin-bottom: 0;
            color: var(--text-on-light);
            font-weight: 500;
        }

        .section-dark .deep-content h2 {
            color: #fff;
        }

        .section-dark .deep-content p {
            color: var(--text-muted-dark);
        }

        .section-dark .deep-content .highlight-block {
            background: rgba(255, 255, 255, 0.05);
            border-left-color: var(--accent-gold);
            box-shadow: none;
        }

        .section-dark .deep-content .highlight-block p {
            color: var(--text-on-dark);
        }

        /* ==================== COMPARISON ==================== */
        .compare-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius-lg);
            padding: 30px;
            height: 100%;
            box-shadow: var(--shadow-light);
        }

        .compare-card .compare-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 22px;
            color: var(--primary-deep);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .compare-card .compare-title i {
            color: var(--accent-cyan);
        }

        .compare-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 14px;
        }

        .compare-row:last-child {
            border-bottom: none;
        }

        .compare-row .compare-label {
            color: var(--text-muted-light);
        }

        .compare-row .compare-values {
            display: flex;
            gap: 16px;
            font-weight: 700;
            font-family: 'SF Mono', 'JetBrains Mono', 'Cascadia Code', monospace;
        }

        .compare-row .compare-values .before {
            color: var(--text-muted-light);
            text-decoration: line-through;
            font-weight: 500;
        }

        .compare-row .compare-values .after {
            color: var(--accent-cyan);
        }

        .compare-row .compare-values .after.gold {
            color: var(--accent-gold);
        }

        .compare-diff-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-green);
            background: rgba(163, 230, 53, 0.12);
            border-radius: 999px;
            padding: 3px 10px;
        }

        /* ==================== TIMELINE ==================== */
        .timeline {
            position: relative;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: rgba(61, 217, 201, 0.3);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 32px;
            padding-left: 22px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-cyan);
            border: 2px solid var(--primary-deep);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.2);
        }

        .timeline-item .timeline-year {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-gold);
            letter-spacing: 0.06em;
            margin-bottom: 6px;
            font-family: 'SF Mono', 'JetBrains Mono', 'Cascadia Code', monospace;
        }

        .timeline-item .timeline-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .timeline-item .timeline-desc {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.7;
            max-width: 560px;
        }

        /* ==================== NEWS LIST ==================== */
        .news-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius);
            overflow: hidden;
            transition: all var(--transition-smooth);
            height: 100%;
            box-shadow: var(--shadow-light);
            display: flex;
            flex-direction: column;
        }

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

        .news-card .news-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
            flex-shrink: 0;
        }

        .news-card .news-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-card .news-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }

        .news-card .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary-deep);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .news-card .news-excerpt {
            font-size: 13px;
            line-height: 1.7;
            color: var(--text-muted-light);
            margin-bottom: 16px;
            flex: 1;
        }

        .news-card .news-link {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
        }

        .news-card .news-link:hover {
            gap: 10px;
            color: #4DE8D8;
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(61, 217, 201, 0.4);
            color: var(--accent-cyan);
            font-weight: 600;
            border-radius: 10px;
            padding: 11px 24px;
            font-size: 14px;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(61, 217, 201, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-1px);
        }

        /* ==================== TOPIC CARDS ==================== */
        .topic-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            height: 100%;
            box-shadow: var(--shadow-light);
        }

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

        .topic-card .topic-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .topic-card .topic-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 27, 45, 0.7) 100%);
        }

        .topic-card .topic-body {
            padding: 18px 22px 22px;
        }

        .topic-card .topic-tag {
            font-size: 11px;
            font-weight: 700;
            color: var(--accent-gold);
            background: rgba(245, 184, 65, 0.12);
            border-radius: 999px;
            padding: 3px 12px;
            display: inline-block;
            margin-bottom: 10px;
            letter-spacing: 0.05em;
        }

        .topic-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary-deep);
            margin-bottom: 8px;
        }

        .topic-card p {
            font-size: 13px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ==================== GUARANTEE / PLATFORM ==================== */
        .guarantee-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius);
            padding: 24px 22px;
            height: 100%;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-light);
        }

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

        .guarantee-item .guarantee-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(61, 217, 201, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .guarantee-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary-deep);
            margin-bottom: 8px;
        }

        .guarantee-item p {
            font-size: 13px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ==================== QUICK ANSWERS ==================== */
        .quick-answer-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .quick-answer-list li {
            display: flex;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 15px;
            align-items: flex-start;
        }

        .quick-answer-list li:last-child {
            border-bottom: none;
        }

        .quick-answer-list .qa-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(61, 217, 201, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 13px;
            flex-shrink: 0;
        }

        .quick-answer-list .qa-text {
            color: var(--text-on-light);
            line-height: 1.7;
        }

        .quick-answer-list .qa-text strong {
            font-weight: 700;
            color: var(--primary-deep);
        }

        .section-dark .quick-answer-list li {
            border-bottom-color: var(--border-soft);
        }

        .section-dark .quick-answer-list .qa-text {
            color: var(--text-on-dark);
        }

        .section-dark .quick-answer-list .qa-text strong {
            color: #fff;
        }

        /* ==================== FAQ ACCORDION ==================== */
        .accordion-custom .accordion-item {
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
        }

        .accordion-custom .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-custom .accordion-button {
            background: #fff;
            color: var(--primary-deep);
            font-weight: 700;
            font-size: 15px;
            padding: 18px 24px;
            border: none;
            border-radius: var(--card-radius) !important;
            box-shadow: none !important;
            transition: all var(--transition-fast);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.06);
            color: var(--accent-cyan);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.2) !important;
            border-color: var(--accent-cyan);
        }

        .accordion-custom .accordion-button::after {
            filter: invert(50%);
        }

        .accordion-custom .accordion-body {
            background: #fff;
            color: var(--text-muted-light);
            font-size: 14px;
            line-height: 1.8;
            padding: 16px 24px 20px;
            border-top: 1px solid var(--border-light);
        }

        .section-dark .accordion-custom .accordion-item {
            border-color: var(--border-soft);
            box-shadow: none;
        }

        .section-dark .accordion-custom .accordion-button {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-on-dark);
        }

        .section-dark .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.1);
            color: var(--accent-cyan);
        }

        .section-dark .accordion-custom .accordion-body {
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-muted-dark);
            border-top-color: var(--border-soft);
        }

        /* ==================== BRAND INTRO ==================== */
        .brand-intro-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-light);
        }

        .brand-intro-card h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary-deep);
            margin-bottom: 16px;
        }

        .brand-intro-card p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 14px;
        }

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

        /* ==================== CONVERSION FORM ==================== */
        .cta-section {
            background: var(--primary-deep);
            color: var(--text-on-dark);
        }

        .cta-panel {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-soft);
            border-radius: var(--card-radius-lg);
            padding: 40px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .cta-panel h2 {
            color: #fff;
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-panel .cta-desc {
            color: var(--text-muted-dark);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 520px;
        }

        .cta-reasons {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
        }

        .cta-reasons li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(237, 240, 244, 0.85);
            font-size: 14px;
            padding: 8px 0;
        }

        .cta-reasons li i {
            color: var(--accent-green);
            font-size: 16px;
        }

        .form-control-custom {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            color: #fff;
            padding: 13px 16px;
            font-size: 14px;
            transition: all var(--transition-fast);
            width: 100%;
        }

        .form-control-custom::placeholder {
            color: rgba(237, 240, 244, 0.45);
        }

        .form-control-custom:focus {
            outline: none;
            border-color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.06);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.15);
        }

        .form-select-custom {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            color: #fff;
            padding: 13px 16px;
            font-size: 14px;
            transition: all var(--transition-fast);
            width: 100%;
            appearance: none;
        }

        .form-select-custom:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.15);
        }

        .form-select-custom option {
            background: var(--primary-deep);
            color: #fff;
        }

        .form-label-custom {
            color: rgba(237, 240, 244, 0.75);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
            display: block;
        }

        .privacy-note {
            font-size: 12px;
            color: var(--text-muted-dark);
            margin-top: 14px;
            line-height: 1.6;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-on-dark);
            padding: 56px 0 0;
            border-top: 1px solid var(--border-soft);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-soft);
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
            font-size: 22px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted-dark);
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-chips .chip-link {
            font-size: 11px;
            padding: 4px 12px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 12px;
            color: var(--text-muted-dark);
        }

        .footer-bottom a {
            color: var(--text-muted-dark);
            transition: all var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom .footer-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ==================== RESPONSIVE GLOBAL ==================== */
        @media (max-width: 992px) {
            :root {
                --section-pad: 60px;
            }
            .hero-section {
                min-height: auto;
                padding: 60px 0;
            }
            .hero-side-panel {
                margin-top: 36px;
            }
            .section-head {
                margin-bottom: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
            }
            .hero-section {
                padding: 44px 0;
            }
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .kpi-card .kpi-number {
                font-size: 30px;
            }
            .cta-panel {
                padding: 24px 20px;
            }
            .brand-intro-card {
                padding: 24px 20px;
            }
            .compare-card {
                padding: 20px 18px;
            }
        }

        @media (max-width: 520px) {
            .hero-cta-group .btn-cyan,
            .hero-cta-group .btn-outline-light {
                width: 100%;
                justify-content: center;
            }
            .hero-meta {
                gap: 14px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .news-card .news-img {
                height: 140px;
            }
        }

        /* ==================== UTILITIES ==================== */
        .text-accent {
            color: var(--accent-cyan) !important;
        }
        .text-gold {
            color: var(--accent-gold) !important;
        }
        .text-green {
            color: var(--accent-green) !important;
        }
        .bg-glow {
            background: radial-gradient(ellipse at center, rgba(61, 217, 201, 0.08) 0%, transparent 70%);
        }
        .mt-6 {
            margin-top: 48px;
        }
        .mb-6 {
            margin-bottom: 48px;
        }

/* roulang page: category1 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 72px;
            --section-pad-mobile: 48px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        button, input, select, textarea {
            font-family: var(--font-body);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

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

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

        .section-dark h2, .section-dark h3, .section-dark h4 {
            color: var(--text-on-dark);
        }

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

        .section-offset {
            background: #F1EEE8;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }

        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 34px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--text-on-light);
        }

        .section-dark .section-head h2 {
            color: var(--text-on-dark);
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: #fff;
        }

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

        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(61, 217, 201, 0.08);
        }

        .header-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.12);
            font-weight: 600;
        }

        .header-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .navbar-toggler {
            border: 1px solid var(--border-soft);
            border-radius: 8px;
            padding: 8px 12px;
            background: transparent;
            color: var(--text-on-dark);
            font-size: 18px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.25);
            outline: none;
        }

        /* ==================== BREADCRUMB ==================== */
        .breadcrumb-wrap {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
            padding: 14px 0;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted-light);
            margin: 0;
            padding: 0;
            list-style: none;
        }

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

        .breadcrumb-custom li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted-light);
            font-size: 13px;
        }

        .breadcrumb-custom a {
            color: var(--text-muted-light);
            transition: color var(--transition-fast);
        }

        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }

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

        /* ==================== PAGE HEADER ==================== */
        .page-header {
            background: var(--primary-deep);
            padding: 60px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.12), transparent 70%);
            pointer-events: none;
        }

        .page-header::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 184, 65, 0.08), transparent 70%);
            pointer-events: none;
        }

        .page-header h1 {
            font-family: var(--font-title);
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .page-header .subtitle {
            font-size: 16px;
            color: var(--text-muted-dark);
            max-width: 640px;
            line-height: 1.8;
            position: relative;
            z-index: 2;
        }

        .page-header .header-chips {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 20px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-cyan);
            border: 1px solid rgba(61, 217, 201, 0.35);
            border-radius: 999px;
            padding: 6px 16px;
            transition: all var(--transition-fast);
            background: rgba(61, 217, 201, 0.06);
        }

        .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
        }

        .chip-link:hover .chip-dot {
            background: var(--primary-deep);
        }

        /* ==================== FEATURED ARTICLE ==================== */
        .featured-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border-light);
            transition: box-shadow var(--transition-smooth);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .featured-card .img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 8;
        }

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

        .featured-card:hover .img-wrap img {
            transform: scale(1.03);
        }

        .featured-card .badge-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent-gold);
            color: var(--primary-deep);
            font-size: 12px;
            font-weight: 700;
            border-radius: 999px;
            padding: 4px 14px;
            z-index: 3;
        }

        .featured-card .content {
            padding: 28px 32px;
        }

        .featured-card .date {
            font-size: 13px;
            color: var(--text-muted-light);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .featured-card h3 {
            font-family: var(--font-title);
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            color: var(--text-on-light);
        }

        .featured-card .summary {
            font-size: 15px;
            color: var(--text-muted-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .btn-read {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-deep);
            border: none;
            background: transparent;
            padding: 0;
            cursor: pointer;
            transition: gap var(--transition-fast);
        }

        .btn-read i {
            font-size: 13px;
            transition: transform var(--transition-fast);
        }

        .btn-read:hover {
            gap: 12px;
            color: var(--accent-cyan);
        }

        .btn-read:hover i {
            transform: translateX(4px);
        }

        /* ==================== NEWS LIST ==================== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--card-radius);
            padding: 20px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-smooth);
        }

        .news-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 217, 201, 0.25);
        }

        .news-item .thumb {
            flex-shrink: 0;
            width: 160px;
            height: 110px;
            border-radius: 10px;
            overflow: hidden;
        }

        .news-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-item:hover .thumb img {
            transform: scale(1.06);
        }

        .news-item .content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .news-item .date {
            font-size: 12px;
            color: var(--text-muted-light);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-item h4 {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-on-light);
        }

        .news-item .summary {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ==================== SECTION DESCRIPTION ==================== */
        .desc-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            padding: 36px 40px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
        }

        .desc-card h2 {
            font-family: var(--font-title);
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-on-light);
        }

        .desc-card p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 12px;
        }

        .desc-card p:last-child {
            margin-bottom: 0;
        }

        /* ==================== TAGS ==================== */
        .tag-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-on-light);
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 999px;
            padding: 6px 18px;
            transition: all var(--transition-fast);
        }

        .tag-item:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.05);
        }

        /* ==================== DATA CARDS ==================== */
        .data-card {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 24px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-smooth);
            height: 100%;
        }

        .data-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(61, 217, 201, 0.3);
        }

        .data-card .data-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(61, 217, 201, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .data-card .data-number {
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 900;
            color: var(--text-on-light);
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }

        .data-card .data-label {
            font-size: 14px;
            color: var(--text-muted-light);
            font-weight: 500;
        }

        /* ==================== FAQ ==================== */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            background: #fff;
        }

        .accordion-custom .accordion-button {
            font-weight: 600;
            color: var(--text-on-light);
            background: #fff;
            padding: 18px 24px;
            font-size: 15px;
            border: none;
            box-shadow: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.06);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.2);
            outline: none;
        }

        .accordion-custom .accordion-body {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-light);
            padding: 16px 24px 20px;
            background: #fff;
        }

        .accordion-custom .accordion-button::after {
            background-size: 14px;
            transition: transform var(--transition-fast);
        }

        /* ==================== SUBSCRIBE CTA ==================== */
        .cta-card {
            background: var(--primary-deep);
            border-radius: var(--card-radius-lg);
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.15), transparent 70%);
            pointer-events: none;
        }

        .cta-card h3 {
            font-family: var(--font-title);
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 2;
        }

        .cta-card p {
            font-size: 14px;
            color: var(--text-muted-dark);
            margin-bottom: 0;
            max-width: 420px;
            line-height: 1.8;
            position: relative;
            z-index: 2;
        }

        .btn-subscribe {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary-deep);
            background: var(--accent-cyan);
            border: none;
            border-radius: 10px;
            padding: 14px 28px;
            cursor: pointer;
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 2;
            white-space: nowrap;
        }

        .btn-subscribe:hover {
            background: #2cc7b5;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(61, 217, 201, 0.3);
        }

        .btn-subscribe:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-muted-dark);
            padding: 56px 0 20px;
            border-top: 1px solid var(--border-soft);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2.2fr 1fr 1.2fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .site-footer .footer-brand {
            color: var(--text-muted-dark);
        }

        .site-footer .footer-brand .brand-logo {
            margin-bottom: 14px;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .site-footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            color: var(--text-muted-dark);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .site-footer ul li a:hover {
            color: var(--accent-cyan);
        }

        .site-footer .footer-chips {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .site-footer .footer-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted-dark);
            border: 1px solid var(--border-soft);
            border-radius: 999px;
            padding: 6px 14px;
            transition: all var(--transition-fast);
            width: fit-content;
        }

        .site-footer .footer-chips .chip-link:hover {
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }

        .site-footer .footer-chips .chip-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 13px;
        }

        .site-footer .footer-bottom span {
            color: var(--text-muted-dark);
        }

        .site-footer .footer-links {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
        }

        .site-footer .footer-links a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: 1.6fr 1fr 1fr;
            }
        }

        @media (max-width: 992px) {
            .header-nav {
                display: none;
            }

            .navbar-toggler {
                display: inline-block;
            }

            .header-nav.mobile-open {
                display: flex;
                flex-direction: column;
                width: 100%;
                background: var(--primary-deep);
                padding: 16px 0;
                gap: 4px;
            }

            .header-nav.mobile-open .nav-link {
                width: 100%;
                text-align: left;
                padding: 10px 16px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (min-width: 993px) {
            .navbar-toggler {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 52px;
            }

            .page-header {
                padding: 40px 0 56px;
            }

            .featured-card .content {
                padding: 20px 20px;
            }

            .featured-card h3 {
                font-size: 18px;
            }

            .news-item {
                flex-direction: column;
                padding: 16px 18px;
            }

            .news-item .thumb {
                width: 100%;
                height: 160px;
            }

            .cta-card {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .desc-card {
                padding: 24px 22px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .page-header h1 {
                font-size: 24px;
            }

            .featured-card .img-wrap {
                aspect-ratio: 16 / 10;
            }

            .news-item .thumb {
                height: 140px;
            }

            .data-card {
                padding: 18px 20px;
            }

            .data-card .data-number {
                font-size: 26px;
            }

            .cta-card h3 {
                font-size: 19px;
            }

            .btn-subscribe {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category3 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 60px;
            --section-pad-mobile: 48px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-body);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

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

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

        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }

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

        .section-offset {
            background: #F1EEE8;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }

        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: #fff;
        }

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

        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(61, 217, 201, 0.08);
        }

        .header-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.12);
            font-weight: 600;
        }

        .header-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

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

        .nav-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.4);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.06);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-chips .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: currentColor;
            flex-shrink: 0;
        }

        /* ==================== BREADCRUMB ==================== */
        .breadcrumb-section {
            background: var(--primary-deeper);
            border-bottom: 1px solid var(--border-soft);
            padding: 18px 0;
        }

        .breadcrumb-section .breadcrumb {
            margin: 0;
            padding: 0;
            list-style: none;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
        }

        .breadcrumb-section .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted-dark);
        }

        .breadcrumb-section .breadcrumb-item a {
            color: var(--text-muted-dark);
            transition: color var(--transition-fast);
        }

        .breadcrumb-section .breadcrumb-item a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-section .breadcrumb-item.active {
            color: var(--accent-cyan);
        }

        .breadcrumb-section .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            color: var(--text-muted-dark);
            opacity: 0.6;
        }

        /* ==================== PAGE HERO ==================== */
        .page-hero {
            background: var(--primary-deep);
            padding: 64px 0 72px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(163, 230, 53, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .page-hero .hero-title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 900;
            letter-spacing: -0.02em;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 18px;
            font-family: var(--font-title);
        }

        .page-hero .hero-title .highlight {
            color: var(--accent-cyan);
        }

        .page-hero .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-muted-dark);
            max-width: 520px;
            margin-bottom: 28px;
        }

        .page-hero .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary-accent {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border: none;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-accent:hover,
        .btn-primary-accent:focus {
            background: #5ce0d2;
            color: var(--primary-deep);
            transform: translateY(-1px) scale(1.02);
            box-shadow: 0 8px 24px rgba(61, 217, 201, 0.3);
        }

        .btn-primary-accent:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .btn-outline-light-accent {
            background: transparent;
            color: var(--text-on-dark);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-light-accent:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.06);
        }

        .page-hero .hero-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-soft);
            border-radius: var(--card-radius-lg);
            padding: 24px 20px;
        }

        .page-hero .hero-metric-item {
            text-align: center;
        }

        .page-hero .hero-metric-number {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-cyan);
            font-family: var(--font-title);
            letter-spacing: -0.01em;
        }

        .page-hero .hero-metric-label {
            font-size: 12px;
            color: var(--text-muted-dark);
            margin-top: 4px;
        }

        /* ==================== LIST CARDS ==================== */
        .list-card-flow {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .list-card {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 24px;
            background: #fff;
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

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

        .list-card .card-cover {
            position: relative;
            min-height: 180px;
            overflow: hidden;
        }

        .list-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .list-card:hover .card-cover img {
            transform: scale(1.05);
        }

        .list-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent-cyan);
            color: var(--primary-deep);
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }

        .list-card .card-body {
            padding: 20px 24px 20px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .list-card .card-date {
            font-size: 12px;
            color: var(--text-muted-light);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .list-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-on-light);
            line-height: 1.5;
            margin-bottom: 8px;
            font-family: var(--font-title);
            letter-spacing: -0.01em;
        }

        .list-card .card-summary {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
        }

        .list-card .card-link:hover {
            color: #2bb8aa;
            gap: 10px;
        }

        /* ==================== DESCRIPTION BODY ==================== */
        .desc-body {
            max-width: 860px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-on-light);
        }

        .desc-body p {
            margin-bottom: 18px;
        }

        .desc-body p:last-child {
            margin-bottom: 0;
        }

        .desc-body .lead-emphasis {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-on-light);
            border-left: 3px solid var(--accent-cyan);
            padding-left: 16px;
            margin-bottom: 20px;
        }

        /* ==================== DATA PANEL ==================== */
        .data-panel-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-panel-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-smooth);
        }

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

        .data-panel-card .data-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(61, 217, 201, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-cyan);
            margin: 0 auto 14px;
        }

        .data-panel-card .data-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-on-light);
            font-family: var(--font-title);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .data-panel-card .data-label {
            font-size: 13px;
            color: var(--text-muted-light);
            font-weight: 500;
        }

        .data-panel-card .data-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-top: 8px;
        }

        .data-panel-card .data-trend.up {
            color: var(--accent-green);
        }

        .data-panel-card .data-trend.down {
            color: var(--accent-gold);
        }

        /* ==================== TAGS / TOPICS ==================== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--text-on-light);
            transition: all var(--transition-fast);
        }

        .tag-chip:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.05);
        }

        .tag-chip .tag-count {
            font-size: 11px;
            color: var(--text-muted-light);
            font-weight: 400;
        }

        /* ==================== MODEL INSIGHTS ==================== */
        .model-insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .model-insight-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            padding: 26px 24px;
            transition: all var(--transition-smooth);
        }

        .model-insight-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .model-insight-card .insight-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(245, 184, 65, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }

        .model-insight-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-on-light);
            margin-bottom: 10px;
            font-family: var(--font-title);
        }

        .model-insight-card p {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ==================== FAQ ==================== */
        .accordion-custom .accordion-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
        }

        .accordion-custom .accordion-item:hover {
            border-color: rgba(61, 217, 201, 0.3);
        }

        .accordion-custom .accordion-button {
            background: #fff;
            color: var(--text-on-light);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: all var(--transition-fast);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.06);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(61, 217, 201, 0.3);
            border: none;
        }

        .accordion-custom .accordion-button::after {
            filter: brightness(0.4);
        }

        .accordion-custom .accordion-body {
            padding: 16px 22px 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-light);
            background: #fff;
        }

        /* ==================== CTA SECTION ==================== */
        .cta-section {
            background: var(--primary-deep);
            border-radius: var(--card-radius-lg);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cta-section h3 {
            color: #fff;
            font-size: 26px;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
            font-family: var(--font-title);
        }

        .cta-section p {
            color: var(--text-muted-dark);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cta-section .cta-reasons {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-section .cta-reason-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-on-dark);
            font-size: 14px;
            font-weight: 500;
        }

        .cta-section .cta-reason-item i {
            color: var(--accent-cyan);
            font-size: 14px;
            flex-shrink: 0;
        }

        .cta-section .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            color: #fff;
            padding: 12px 16px;
            font-size: 14px;
            transition: all var(--transition-fast);
        }

        .cta-section .form-control::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .cta-section .form-control:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-cyan);
            color: #fff;
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.15);
        }

        .cta-section .form-label {
            color: var(--text-muted-dark);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 6px;
        }

        .btn-submit-accent {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border: none;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            transition: all var(--transition-smooth);
            width: 100%;
        }

        .btn-submit-accent:hover {
            background: #5ce0d2;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(61, 217, 201, 0.3);
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-muted-dark);
            padding: 56px 0 0;
            border-top: 1px solid var(--border-soft);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            font-size: 18px;
            margin-bottom: 14px;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-muted-dark);
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted-dark);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

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

        .footer-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.3);
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
        }

        .footer-chips .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted-dark);
        }

        .footer-links {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-links a {
            color: var(--text-muted-dark);
            font-size: 12px;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 1024px) {
            .page-hero .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .page-hero .hero-metrics {
                max-width: 500px;
            }

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

            .model-insight-grid {
                grid-template-columns: 1fr 1fr;
            }

            .cta-section .cta-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

        @media (max-width: 768px) {
            .site-header .header-main {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .header-nav {
                gap: 2px;
                width: 100%;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 4px;
            }

            .header-nav .nav-link {
                font-size: 13px;
                padding: 7px 10px;
            }

            .nav-chips {
                display: none;
            }

            .list-card {
                grid-template-columns: 1fr;
            }

            .list-card .card-cover {
                min-height: 160px;
            }

            .list-card .card-body {
                padding: 18px 20px;
            }

            .data-panel-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .model-insight-grid {
                grid-template-columns: 1fr;
            }

            .section {
                padding: var(--section-pad-mobile) 0;
            }

            .cta-section {
                padding: 32px 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

        @media (max-width: 576px) {
            .page-hero {
                padding: 44px 0 56px;
            }

            .page-hero .hero-metrics {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .data-panel-grid {
                grid-template-columns: 1fr;
            }

            .list-card .card-cover {
                min-height: 140px;
            }

            .cta-section .cta-reasons {
                gap: 8px;
            }

            .footer-bottom {
                font-size: 11px;
            }

            .footer-links {
                gap: 10px;
                font-size: 11px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 72px;
            --section-pad-mobile: 48px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-body);
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-title);
            color: var(--text-on-light);
            margin-top: 0;
            line-height: 1.35;
            letter-spacing: -0.01em;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

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

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

        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }

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

        .section-offset {
            background: #F1EEE8;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }

        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* ==================== HEADER / NAV ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: #fff;
        }

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

        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .header-nav .nav-link.active {
            color: #fff;
            background: rgba(61, 217, 201, 0.15);
            box-shadow: inset 0 0 0 1px rgba(61, 217, 201, 0.35);
        }

        .header-chips {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.4);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.06);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .chip-link .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
        }

        /* ==================== BREADCRUMB ==================== */
        .breadcrumb-section {
            padding: 0;
            margin: 0;
        }

        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 14px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            list-style: none;
        }

        .breadcrumb-item {
            display: flex;
            align-items: center;
            color: var(--text-muted-dark);
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            margin: 0 10px;
            color: var(--text-muted-dark);
        }

        .breadcrumb-item a {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .breadcrumb-item a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb-item.active {
            color: var(--text-on-dark);
            font-weight: 600;
        }

        /* ==================== CATEGORY HERO (compact) ==================== */
        .category-hero {
            background: var(--primary-deep);
            background-image: linear-gradient(rgba(10, 19, 34, 0.86), rgba(10, 19, 34, 0.92)), url('/assets/images/5a128bd477971418.webp');
            background-size: cover;
            background-position: center;
            padding: 48px 0 52px;
            position: relative;
            border-bottom: 1px solid var(--border-soft);
            color: var(--text-on-dark);
        }

        .category-hero .breadcrumb-wrap {
            margin-bottom: 20px;
        }

        .category-hero h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 900;
            color: var(--text-on-dark);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .category-hero .hero-sub {
            font-size: 16px;
            color: var(--text-muted-dark);
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 0;
        }

        /* ==================== DATA LIST CARDS ==================== */
        .data-list-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .data-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 24px;
            background: #fff;
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            padding: 20px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .data-card .card-cover {
            border-radius: var(--card-radius);
            overflow: hidden;
            aspect-ratio: 16/10;
            position: relative;
            background: var(--primary-deep);
        }

        .data-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 400ms ease;
        }

        .data-card:hover .card-cover img {
            transform: scale(1.04);
        }

        .data-card .card-body-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 10px;
        }

        .data-card .card-date {
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .data-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-on-light);
            line-height: 1.45;
            margin-bottom: 0;
        }

        .data-card .card-summary {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.75;
            margin-bottom: 6px;
        }

        .data-card .btn-readmore {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: none;
            border: none;
            padding: 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .data-card .btn-readmore i {
            font-size: 13px;
            transition: transform var(--transition-fast);
        }

        .data-card .btn-readmore:hover {
            color: var(--primary-deep);
        }

        .data-card .btn-readmore:hover i {
            transform: translateX(4px);
        }

        /* ==================== CATEGORY DESCRIPTION ==================== */
        .category-desc-box {
            background: #fff;
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            padding: 36px 40px;
            max-width: 900px;
        }

        .category-desc-box h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .category-desc-box p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        /* ==================== TAGS ==================== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .tag-list li {
            margin: 0;
            padding: 0;
        }

        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.35);
            color: var(--primary-deep);
            background: #fff;
            transition: all var(--transition-fast);
        }

        .tag-badge:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(61, 217, 201, 0.25);
        }

        /* ==================== DATA SPOTLIGHT CARDS ==================== */
        .data-spot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .data-spot-card {
            background: var(--primary-deep);
            border-radius: var(--card-radius);
            border: 1px solid var(--border-soft);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            color: var(--text-on-dark);
        }

        .data-spot-card:hover {
            transform: translateY(-4px);
            border-color: rgba(61, 217, 201, 0.4);
            box-shadow: var(--shadow-dark);
        }

        .data-spot-card .spot-value {
            font-family: var(--font-title);
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 900;
            letter-spacing: -0.03em;
            color: var(--accent-cyan);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .data-spot-card .spot-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted-dark);
            margin-bottom: 0;
        }

        /* ==================== FAQ ACCORDION ==================== */
        .accordion-custom {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .accordion-custom .accordion-item {
            background: #fff;
            border-radius: var(--card-radius);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .accordion-custom .accordion-item:focus-within {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.2);
        }

        .accordion-custom .accordion-header {
            margin: 0;
        }

        .accordion-custom .accordion-button {
            background: #fff;
            color: var(--text-on-light);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            border: none;
            border-radius: 0;
            box-shadow: none;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            text-align: left;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: #f0fcf9;
            color: var(--primary-deep);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-custom .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background: none;
            color: var(--accent-cyan);
            font-size: 14px;
            transition: transform var(--transition-fast);
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .accordion-custom .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-muted-light);
        }

        /* ==================== CTA CARD ==================== */
        .cta-card {
            background: linear-gradient(135deg, var(--primary-deep) 0%, #152238 55%, #0A1322 100%);
            border-radius: var(--card-radius-lg);
            border: 1px solid var(--border-soft);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            right: -120px;
            top: -80px;
            width: 300px;
            height: 300px;
            background: rgba(61, 217, 201, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card .cta-text h3 {
            font-size: clamp(22px, 2.8vw, 30px);
            font-weight: 800;
            color: var(--text-on-dark);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-card .cta-text p {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cta-card .cta-actions {
            display: flex;
            flex-direction: column;
            gap: 14px;
            justify-content: center;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: var(--primary-deep);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: var(--card-radius);
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-primary-custom:hover {
            background: #5ce8dc;
            transform: translateY(-1px) scale(1.02);
            box-shadow: 0 10px 24px rgba(61, 217, 201, 0.35);
            color: var(--primary-deep);
        }

        .btn-primary-custom:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 2px;
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text-on-dark);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--card-radius);
            border: 1px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-outline-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-1px);
        }

        .btn-outline-custom:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        /* ==================== FOOTER ==================== */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-on-dark);
            padding: 60px 0 0;
            border-top: 1px solid var(--border-soft);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-dark);
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-on-dark);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted-dark);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-chips .chip-link {
            font-size: 13px;
            padding: 6px 14px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 20px 0;
            border-top: 1px solid var(--border-soft);
            font-size: 13px;
            color: var(--text-muted-dark);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* ==================== RESPONSIVE ==================== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }

            .site-header .header-main {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .header-chips {
                margin-left: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .cta-card {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 36px 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-nav {
                gap: 2px;
                width: 100%;
            }

            .header-nav .nav-link {
                font-size: 13px;
                padding: 6px 10px;
            }

            .category-hero {
                padding: 36px 0 40px;
            }

            .data-card {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 16px;
            }

            .data-card .card-cover {
                aspect-ratio: 16/9;
            }

            .category-desc-box {
                padding: 24px 20px;
            }

            .cta-card {
                padding: 28px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .footer-links {
                gap: 10px;
                flex-wrap: wrap;
            }
        }

        @media (max-width: 576px) {
            :root {
                --section-pad: 40px;
            }

            .header-nav .nav-link {
                font-size: 12px;
                padding: 5px 8px;
            }

            .header-chips {
                gap: 6px;
            }

            .chip-link {
                font-size: 12px;
                padding: 5px 10px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .data-spot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .data-spot-card {
                padding: 20px 16px;
            }

            .data-spot-card .spot-value {
                font-size: 28px;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                font-size: 15px;
                padding: 12px 20px;
            }

            .tag-badge {
                font-size: 13px;
                padding: 6px 14px;
            }
        }

        @media (max-width: 420px) {
            .header-main {
                gap: 8px;
            }

            .header-nav {
                gap: 0;
            }

            .header-nav .nav-link {
                font-size: 11px;
                padding: 4px 6px;
            }

            .chip-link {
                font-size: 11px;
                padding: 4px 8px;
            }

            .data-spot-grid {
                grid-template-columns: 1fr;
            }

            .section-head h2 {
                font-size: 22px;
            }
        }

/* roulang page: category5 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-body);
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: var(--section-pad) 0;
            position: relative;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-on-dark);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }
        .section-light {
            background: var(--bg-light);
        }
        .section-offset {
            background: #F1EEE8;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }
        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }
        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }
        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }
        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: #fff;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .header-nav .nav-link.active {
            color: #fff;
            background: rgba(61, 217, 201, 0.12);
            box-shadow: inset 0 0 0 1px rgba(61, 217, 201, 0.25);
        }
        .header-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            padding: 5px 12px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.30);
            background: rgba(61, 217, 201, 0.06);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .chip-link:hover {
            background: rgba(61, 217, 201, 0.18);
            border-color: var(--accent-cyan);
            color: #fff;
        }
        .chip-link .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-gold);
            flex-shrink: 0;
        }
        .navbar-toggler {
            border: 1px solid var(--border-soft);
            color: #fff;
            padding: 8px 12px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.04);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px rgba(61, 217, 201, 0.4);
            outline: none;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(237, 240, 244, 0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        @media (max-width: 992px) {
            .header-nav {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 2px;
                padding-top: 8px;
            }
            .header-nav .nav-link {
                padding: 10px 14px;
                border-radius: 8px;
            }
            .header-chips {
                width: 100%;
                padding-top: 8px;
            }
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--primary-deeper);
            border-bottom: 1px solid var(--border-soft);
            padding: 14px 0;
        }
        .breadcrumb-bar .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 13px;
        }
        .breadcrumb-bar .breadcrumb-item {
            color: var(--text-muted-dark);
        }
        .breadcrumb-bar .breadcrumb-item a {
            color: var(--accent-cyan);
            transition: color var(--transition-fast);
        }
        .breadcrumb-bar .breadcrumb-item a:hover {
            color: #fff;
        }
        .breadcrumb-bar .breadcrumb-item.active {
            color: #fff;
            font-weight: 500;
        }
        .breadcrumb-bar .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            color: var(--text-muted-dark);
            padding: 0 8px;
        }

        /* Category Intro */
        .category-intro {
            padding: 48px 0 32px;
            background: var(--bg-light);
        }
        .category-intro h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            color: var(--text-on-light);
            font-family: var(--font-title);
        }
        .category-intro .intro-text {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-muted-light);
            max-width: 860px;
            margin-bottom: 0;
        }

        /* Article list */
        .article-list-section {
            background: var(--bg-light);
            padding-top: 24px;
        }
        .article-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .article-card .article-media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .article-card .article-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .article-card:hover .article-media img {
            transform: scale(1.04);
        }
        .article-card .article-body {
            padding: 24px 24px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .article-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }
        .article-card .article-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-on-light);
            font-family: var(--font-title);
        }
        .article-card .article-title a {
            color: inherit;
        }
        .article-card .article-title a:hover {
            color: var(--accent-cyan);
        }
        .article-card .article-excerpt {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-light);
            margin-bottom: 16px;
            flex: 1;
        }
        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-on-light);
            padding: 0;
            background: none;
            border: none;
            transition: all var(--transition-fast);
        }
        .btn-read-more i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }
        .btn-read-more:hover {
            color: var(--accent-cyan);
        }
        .btn-read-more:hover i {
            transform: translateX(4px);
        }

        /* Tag chips */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-on-light);
            padding: 8px 16px;
            border-radius: 999px;
            background: #fff;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
        }
        .tag-cloud .tag:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .tag-cloud .tag i {
            font-size: 11px;
            color: var(--accent-gold);
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-light);
        }
        .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-light);
        }
        .accordion-button {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-on-light);
            padding: 18px 24px;
            background: #fff;
            border: none;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: #F0FBFA;
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(61, 217, 201, 0.35);
            outline: none;
        }
        .accordion-button::after {
            background-size: 16px;
            background-position: center;
        }
        .accordion-body {
            font-size: 14px;
            line-height: 1.9;
            color: var(--text-muted-light);
            padding: 16px 24px 20px;
        }

        /* CTA subscribe */
        .subscribe-panel {
            background: var(--bg-dark);
            border-radius: var(--card-radius-lg);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }
        .subscribe-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.18), transparent 70%);
            pointer-events: none;
        }
        .subscribe-panel::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 184, 65, 0.12), transparent 70%);
            pointer-events: none;
        }
        .subscribe-panel h2 {
            color: #fff;
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .subscribe-panel p {
            color: var(--text-muted-dark);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 520px;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border-radius: 10px;
            border: 1px solid var(--border-soft);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 14px;
            transition: all var(--transition-fast);
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted-dark);
        }
        .subscribe-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.18);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 10px;
            background: var(--accent-cyan);
            color: var(--primary-deep);
            font-weight: 700;
            font-size: 14px;
            border: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background: #4EE5D8;
            color: var(--primary-deep);
            transform: translateY(-1px) scale(1.02);
            box-shadow: 0 12px 28px rgba(61, 217, 201, 0.35);
        }
        .btn-primary-custom:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-deeper);
            border-top: 1px solid var(--border-soft);
            color: var(--text-muted-dark);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 28px;
            margin-bottom: 36px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-muted-dark);
            max-width: 360px;
            margin-bottom: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: all var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-chips {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-chips .chip-link {
            align-self: flex-start;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-soft);
            font-size: 12px;
            color: var(--text-muted-dark);
        }
        .footer-links {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-links a {
            color: var(--text-muted-dark);
            font-size: 12px;
            transition: all var(--transition-fast);
        }
        .footer-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .section {
                padding: 56px 0;
            }
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section {
                padding: 48px 0;
            }
            .subscribe-panel {
                padding: 36px 24px;
            }
            .category-intro h1 {
                font-size: 26px;
            }
            .article-card .article-body {
                padding: 20px 18px 16px;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .header-main {
                padding: 10px 0;
            }
            .brand-logo {
                font-size: 18px;
            }
            .brand-logo .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input {
                min-width: 100%;
            }
            .btn-primary-custom {
                justify-content: center;
                width: 100%;
            }
        }

/* roulang page: category4 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 60px;
            --section-pad-mobile: 48px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: var(--font-body);
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: var(--section-pad) 0;
            position: relative;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-on-dark);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }
        .section-light {
            background: var(--bg-light);
        }
        .section-offset {
            background: #F1EEE8;
        }
        .section-head {
            margin-bottom: 36px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }
        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }
        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }
        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: #fff;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(61, 217, 201, 0.12);
        }
        .header-nav .nav-link.active {
            color: #fff;
            background: rgba(61, 217, 201, 0.16);
        }
        .header-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .header-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .header-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-cyan);
            padding: 6px 12px;
            border: 1px solid rgba(61, 217, 201, 0.35);
            border-radius: 999px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .header-chips .chip-link:hover {
            background: rgba(61, 217, 201, 0.15);
            color: #fff;
            border-color: var(--accent-cyan);
        }
        .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-gold);
            display: inline-block;
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 6px 10px;
            border-radius: 8px;
            background: transparent;
        }
        .navbar-toggler i {
            font-size: 20px;
            color: #fff;
        }
        .navbar-collapse {
            flex-basis: 100%;
        }
        @media (min-width: 992px) {
            .navbar-collapse {
                flex-basis: auto;
                display: flex;
            }
            .navbar-toggler {
                display: none;
            }
        }
        @media (max-width: 991.98px) {
            .header-main {
                gap: 12px;
            }
            .header-nav {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                padding: 12px 0;
            }
            .header-nav .nav-link {
                padding: 10px 14px;
            }
            .header-chips {
                padding: 8px 0;
            }
            .navbar-collapse {
                background: var(--primary-deeper);
                border-radius: 10px;
                padding: 8px 12px;
                margin-top: 6px;
            }
        }

        /* Breadcrumb */
        .breadcrumb-area {
            background: linear-gradient(135deg, var(--primary-deeper) 0%, #132238 55%, #0F1B2D 100%);
            padding: 28px 0;
            border-bottom: 1px solid var(--border-soft);
            position: relative;
            overflow: hidden;
        }
        .breadcrumb-area::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(61, 217, 201, 0.06);
            pointer-events: none;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted-dark);
            flex-wrap: wrap;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        .breadcrumb-nav a {
            color: var(--text-muted-dark);
            transition: color var(--transition-fast);
        }
        .breadcrumb-nav a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-nav .separator {
            color: rgba(255, 255, 255, 0.25);
            font-size: 12px;
        }
        .breadcrumb-nav .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }
        .breadcrumb-area h1 {
            font-size: clamp(26px, 3.4vw, 38px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
        }
        .breadcrumb-area .crumb-sub {
            font-size: 15px;
            color: var(--text-muted-dark);
            margin-bottom: 0;
            position: relative;
            z-index: 1;
            max-width: 600px;
        }

        /* Team Cards */
        .team-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 768px) {
            .team-card-grid {
                grid-template-columns: 1fr;
            }
        }
        .team-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .team-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .team-card .team-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--primary-deep);
        }
        .team-card .team-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .team-card:hover .team-card-img img {
            transform: scale(1.05);
        }
        .team-card .team-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 27, 45, 0.82);
            backdrop-filter: blur(6px);
            color: var(--accent-cyan);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            border: 1px solid rgba(61, 217, 201, 0.3);
        }
        .team-card .team-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .team-card .team-date {
            font-size: 12px;
            color: var(--text-muted-light);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .team-card .team-date i {
            color: var(--accent-cyan);
            font-size: 12px;
        }
        .team-card h3 {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 10px;
            color: var(--text-on-light);
            line-height: 1.5;
        }
        .team-card p {
            font-size: 14px;
            color: var(--text-muted-light);
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.7;
        }
        .team-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            align-self: flex-start;
        }
        .team-card .read-more:hover {
            gap: 10px;
            color: var(--accent-green);
        }
        .team-card .read-more i {
            font-size: 13px;
            transition: transform var(--transition-fast);
        }
        .team-card .read-more:hover i {
            transform: translateX(3px);
        }

        /* Category Description */
        .cat-desc-block {
            background: #fff;
            border-radius: var(--card-radius-lg);
            padding: 36px 40px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
        }
        .cat-desc-block h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-on-light);
        }
        .cat-desc-block p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            padding: 7px 16px;
            border-radius: 999px;
            background: #fff;
            border: 1px solid var(--border-light);
            color: var(--text-muted-light);
            transition: all var(--transition-fast);
        }
        .tag-cloud .tag-item:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.05);
        }
        .tag-cloud .tag-item i {
            font-size: 12px;
            color: var(--accent-gold);
        }

        /* Data chips */
        .stat-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        @media (max-width: 992px) {
            .stat-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .stat-strip {
                grid-template-columns: 1fr;
            }
        }
        .stat-strip .stat-item {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 22px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
        }
        .stat-strip .stat-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .stat-strip .stat-number {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .stat-strip .stat-label {
            font-size: 13px;
            color: var(--text-muted-light);
            margin-top: 6px;
            font-weight: 500;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: box-shadow var(--transition-fast);
        }
        .faq-accordion .accordion-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-accordion .accordion-button {
            background: #fff;
            color: var(--text-on-light);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            transition: all var(--transition-fast);
            border-radius: var(--card-radius) !important;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.05);
            color: var(--text-on-light);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(61, 217, 201, 0.3);
            border: none;
        }
        .faq-accordion .accordion-button::after {
            background-size: 16px;
            width: 16px;
            height: 16px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23667085'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
        }
        .faq-accordion .accordion-body {
            padding: 18px 24px 22px;
            color: var(--text-muted-light);
            font-size: 15px;
            line-height: 1.8;
        }

        /* CTA Subscribe */
        .cta-subscribe {
            background: linear-gradient(135deg, var(--primary-deep) 0%, #132238 60%, #0F1B2D 100%);
            border-radius: var(--card-radius-lg);
            padding: 44px 40px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-soft);
        }
        .cta-subscribe::before {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(61, 217, 201, 0.08);
            pointer-events: none;
        }
        .cta-subscribe::after {
            content: '';
            position: absolute;
            left: -40px;
            bottom: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(245, 184, 65, 0.05);
            pointer-events: none;
        }
        .cta-subscribe h3 {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-subscribe p {
            color: var(--text-muted-dark);
            font-size: 15px;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }
        .cta-subscribe .btn-cta {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: 8px;
            border: none;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
            white-space: nowrap;
        }
        .cta-subscribe .btn-cta:hover,
        .cta-subscribe .btn-cta:focus {
            background: var(--accent-green);
            color: var(--primary-deep);
            transform: translateY(-1px) scale(1.02);
            box-shadow: 0 8px 20px rgba(61, 217, 201, 0.3);
        }

        /* Related reading */
        .related-card {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 18px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            display: flex;
            align-items: center;
            gap: 14px;
            transition: all var(--transition-fast);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .related-card .related-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(61, 217, 201, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 18px;
            flex-shrink: 0;
        }
        .related-card .related-info h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-on-light);
        }
        .related-card .related-info p {
            font-size: 13px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-on-dark);
            padding: 56px 0 24px;
            border-top: 1px solid var(--border-soft);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        @media (max-width: 992px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 576px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .site-footer .footer-brand .brand-logo {
            font-size: 18px;
            margin-bottom: 14px;
            display: inline-flex;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.8;
            max-width: 360px;
            margin-bottom: 0;
        }
        .site-footer .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            color: var(--text-muted-dark);
            font-size: 14px;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .site-footer .footer-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .site-footer .footer-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted-dark);
            padding: 5px 12px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .site-footer .footer-chips .chip-link:hover {
            background: rgba(61, 217, 201, 0.1);
            color: var(--accent-cyan);
            border-color: rgba(61, 217, 201, 0.3);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .site-footer .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted-dark);
        }
        .site-footer .footer-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .site-footer .footer-links a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* Responsive extras */
        @media (max-width: 576px) {
            .section {
                padding: var(--section-pad-mobile) 0;
            }
            .breadcrumb-area {
                padding: 20px 0;
            }
            .cat-desc-block {
                padding: 24px 20px;
            }
            .cta-subscribe {
                padding: 30px 22px;
            }
            .team-card .team-card-body {
                padding: 18px 18px 20px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category6 */
:root {
            --primary-deep: #0F1B2D;
            --primary-deeper: #0A1322;
            --accent-cyan: #3DD9C9;
            --accent-green: #A3E635;
            --accent-gold: #F5B841;
            --bg-light: #F7F5F0;
            --bg-dark: #0F1B2D;
            --text-on-dark: #EDF0F4;
            --text-on-light: #101828;
            --text-muted-dark: #9AA5B1;
            --text-muted-light: #667085;
            --border-soft: rgba(255, 255, 255, 0.10);
            --border-light: rgba(16, 24, 40, 0.08);
            --card-radius: 14px;
            --card-radius-lg: 20px;
            --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --section-pad: 72px;
            --section-pad-mobile: 48px;
            --font-title: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-on-light);
            background: var(--bg-light);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-body);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-title);
            font-weight: 700;
            color: var(--text-on-light);
            line-height: 1.3;
            margin-top: 0;
        }

        p {
            margin-top: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

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

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

        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-on-dark);
        }

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

        .section-offset {
            background: #F1EEE8;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-head .eyebrow::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .section-dark .section-head .eyebrow {
            color: var(--accent-cyan);
        }

        .section-head h2 {
            font-size: clamp(24px, 3.2vw, 36px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
            color: var(--text-muted-light);
            margin-bottom: 0;
        }

        .section-dark .section-head p {
            color: var(--text-muted-dark);
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .site-header .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: #fff;
        }

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

        .header-nav .nav-link {
            color: var(--text-muted-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav .nav-link:hover,
        .header-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .header-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(61, 217, 201, 0.10);
        }

        .header-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 3px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .header-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .header-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(61, 217, 201, 0.30);
            background: rgba(61, 217, 201, 0.06);
            border-radius: 999px;
            padding: 5px 12px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .header-chips .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-gold);
            flex-shrink: 0;
        }

        .navbar-toggler {
            border: 1px solid var(--border-soft);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 18px;
            display: none;
        }

        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* Mobile nav */
        .mobile-nav-wrap {
            display: none;
            background: var(--primary-deeper);
            padding: 16px 24px;
            border-top: 1px solid var(--border-soft);
        }

        .mobile-nav-wrap .mobile-nav-link {
            display: block;
            padding: 10px 0;
            color: var(--text-muted-dark);
            font-size: 15px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color var(--transition-fast);
        }

        .mobile-nav-wrap .mobile-nav-link:hover,
        .mobile-nav-wrap .mobile-nav-link.active {
            color: var(--accent-cyan);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--primary-deep);
            border-bottom: 1px solid var(--border-soft);
            padding: 18px 0;
        }

        .breadcrumb-bar .breadcrumb {
            margin: 0;
            padding: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            font-size: 14px;
            color: var(--text-muted-dark);
        }

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

        .breadcrumb-bar .breadcrumb li + li::before {
            content: '/';
            color: var(--text-muted-dark);
            opacity: 0.6;
        }

        .breadcrumb-bar .breadcrumb a {
            color: var(--accent-cyan);
            transition: color var(--transition-fast);
        }

        .breadcrumb-bar .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb-bar .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        /* Category Page Header */
        .category-page-header {
            background: var(--primary-deep);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .category-page-header::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.08), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-page-header h1 {
            color: #fff;
            font-size: clamp(30px, 4.5vw, 44px);
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .category-page-header .lead {
            color: var(--text-muted-dark);
            font-size: 17px;
            max-width: 720px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        /* Community list */
        .community-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .community-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }

        .community-item:first-child {
            padding-top: 0;
        }

        .community-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .community-item:hover {
            padding-left: 8px;
        }

        .community-thumb {
            flex-shrink: 0;
            width: 180px;
            height: 120px;
            border-radius: 12px;
            overflow: hidden;
            background: var(--primary-deep);
        }

        .community-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .community-item:hover .community-thumb img {
            transform: scale(1.04);
        }

        .community-content {
            flex: 1;
            min-width: 0;
        }

        .community-item .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted-light);
            margin-bottom: 8px;
        }

        .community-item .meta .date {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .community-item .meta .badge-tag {
            display: inline-block;
            background: rgba(61, 217, 201, 0.10);
            color: #0F9D8F;
            border: 1px solid rgba(61, 217, 201, 0.25);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            white-space: nowrap;
        }

        .community-item h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .community-item h3 a {
            color: var(--text-on-light);
            transition: color var(--transition-fast);
        }

        .community-item h3 a:hover {
            color: var(--accent-cyan);
        }

        .community-item .excerpt {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .community-item .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast), color var(--transition-fast);
        }

        .community-item .read-more:hover {
            color: #0F9D8F;
            gap: 10px;
        }

        /* Category description */
        .category-desc-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            padding: 36px 40px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
        }

        .category-desc-card p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-on-light);
            margin-bottom: 16px;
        }

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

        /* Community stats */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
        }

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

        .stat-card .stat-number {
            font-size: 36px;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--accent-cyan);
            font-family: var(--font-title);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-card .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted-light);
            letter-spacing: 0.02em;
        }

        /* Topic tags */
        .topic-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: 999px;
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--text-on-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .topic-tag:hover {
            border-color: var(--accent-cyan);
            color: #0F9D8F;
            background: rgba(61, 217, 201, 0.06);
            transform: translateY(-2px);
        }

        .topic-tag .tag-count {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 24px;
            height: 24px;
            border-radius: 999px;
            background: var(--primary-deep);
            color: var(--accent-cyan);
            font-size: 12px;
            font-weight: 700;
            padding: 0 6px;
        }

        /* FAQ */
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--card-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
        }

        .accordion-button {
            font-family: var(--font-title);
            font-weight: 600;
            font-size: 16px;
            color: var(--text-on-light);
            padding: 20px 24px;
            background: #fff;
            border: none;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(61, 217, 201, 0.06);
            color: #0F9D8F;
        }

        .accordion-button:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.2) !important;
        }

        .accordion-button::after {
            background-size: 16px;
            transition: transform var(--transition-fast);
        }

        .accordion-body {
            font-size: 15px;
            color: var(--text-muted-light);
            line-height: 1.8;
            padding: 0 24px 20px;
            background: #fff;
        }

        /* CTA subscribe */
        .subscribe-card {
            background: var(--primary-deep);
            border-radius: var(--card-radius-lg);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }

        .subscribe-card::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(61, 217, 201, 0.12), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .subscribe-card .sub-info {
            position: relative;
            z-index: 1;
        }

        .subscribe-card .sub-info h3 {
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .subscribe-card .sub-info p {
            color: var(--text-muted-dark);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .subscribe-card .sub-benefits {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .subscribe-card .sub-benefits li {
            color: var(--text-muted-dark);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .subscribe-card .sub-benefits li i {
            color: var(--accent-green);
            font-size: 14px;
            flex-shrink: 0;
        }

        .subscribe-form {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .subscribe-form .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 12px 16px;
            color: #fff;
            font-size: 14px;
            transition: all var(--transition-fast);
        }

        .subscribe-form .form-control::placeholder {
            color: var(--text-muted-dark);
        }

        .subscribe-form .form-control:focus {
            background: rgba(255, 255, 255, 0.10);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.15);
            color: #fff;
        }

        .subscribe-form .form-select {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 12px 16px;
            color: #fff;
            font-size: 14px;
            transition: all var(--transition-fast);
        }

        .subscribe-form .form-select:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(61, 217, 201, 0.15);
            background-color: rgba(255, 255, 255, 0.10);
        }

        .subscribe-form .form-select option {
            background: var(--primary-deep);
            color: #fff;
        }

        .btn-primary-custom {
            background: var(--accent-cyan);
            border: none;
            border-radius: 10px;
            padding: 12px 20px;
            font-weight: 700;
            font-size: 15px;
            color: var(--primary-deep);
            cursor: pointer;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary-custom:hover {
            background: #2BB8A8;
            transform: translateY(-1px) scale(1.01);
            box-shadow: 0 8px 20px rgba(61, 217, 201, 0.30);
            color: var(--primary-deep);
        }

        .btn-primary-custom:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        /* Related topics */
        .related-topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-topic-card {
            background: #fff;
            border-radius: var(--card-radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
        }

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

        .related-topic-card .rt-thumb {
            width: 100%;
            height: 160px;
            overflow: hidden;
            background: var(--primary-deep);
        }

        .related-topic-card .rt-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .related-topic-card:hover .rt-thumb img {
            transform: scale(1.05);
        }

        .related-topic-card .rt-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-topic-card .rt-body h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .related-topic-card .rt-body p {
            font-size: 14px;
            color: var(--text-muted-light);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .related-topic-card .rt-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast), color var(--transition-fast);
        }

        .related-topic-card .rt-link:hover {
            color: #0F9D8F;
            gap: 10px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-deeper);
            color: var(--text-muted-dark);
            padding: 56px 0 32px;
            border-top: 1px solid var(--border-soft);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-dark);
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            color: var(--text-muted-dark);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-chips {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-chips .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(61, 217, 201, 0.25);
            background: rgba(61, 217, 201, 0.06);
            border-radius: 999px;
            padding: 8px 14px;
            transition: all var(--transition-fast);
            width: fit-content;
        }

        .footer-chips .chip-link:hover {
            background: var(--accent-cyan);
            color: var(--primary-deep);
            border-color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }

        .footer-bottom span {
            color: var(--text-muted-dark);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted-dark);
            font-size: 13px;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .header-nav {
                display: none;
            }
            .header-chips {
                display: none;
            }
            .navbar-toggler {
                display: inline-flex;
            }
            .mobile-nav-wrap {
                display: block;
            }
            .mobile-nav-wrap.show {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .subscribe-card {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 36px 28px;
            }
            .community-thumb {
                width: 140px;
                height: 100px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-page-header {
                padding: 36px 0 40px;
            }
            .community-item {
                flex-direction: column;
                gap: 14px;
            }
            .community-thumb {
                width: 100%;
                height: 180px;
            }
            .related-topics-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 576px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-desc-card {
                padding: 24px 20px;
            }
            .subscribe-card {
                padding: 28px 20px;
                border-radius: var(--card-radius);
            }
            .community-item .meta {
                flex-wrap: wrap;
            }
        }

/* 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}