/* roulang page: index */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        a:hover {
            color: #5ee0d0;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul, ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text-primary);
        }

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

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 1024px) {
            .nav-links li a {
                padding: 8px 10px;
                font-size: 13px;
            }
        }

        @media (max-width: 860px) {
            .site-header {
                top: 12px;
                width: calc(100% - 24px);
            }
            .site-header.scrolled {
                top: 0;
                width: 100%;
            }
            .main-nav {
                border-radius: 14px;
            }
            .site-header.scrolled .main-nav {
                border-radius: 0;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: absolute;
                top: calc(var(--nav-height) + 8px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                background: rgba(17, 24, 32, 0.98);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 8px;
                display: none;
                box-shadow: var(--shadow-nav);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 15px;
                text-align: center;
            }
            .site-header.scrolled .nav-links {
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                border-top: none;
            }
        }

        @media (max-width: 520px) {
            .site-header {
                top: 8px;
                width: calc(100% - 16px);
            }
            .main-nav {
                height: 54px;
                padding: 0 14px;
                border-radius: 12px;
            }
            .site-header.scrolled .main-nav {
                border-radius: 0;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 14px;
                border-radius: 6px;
            }
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            padding-top: calc(var(--nav-height) + 64px);
            padding-bottom: 64px;
            background-image: url('/assets/images/593618062ccf8c76.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 17, 22, 0.82) 0%, rgba(13, 17, 22, 0.68) 40%, rgba(13, 17, 22, 0.88) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 60%, rgba(45, 212, 191, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
            z-index: 1;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }

        .hero-content {
            max-width: 620px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-primary-dim);
            border: 1px solid rgba(45, 212, 191, 0.25);
            color: var(--accent-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }

        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--accent-primary);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.4); }
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.18;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }

        .hero h1 .highlight {
            color: var(--accent-primary);
            position: relative;
        }

        .hero-subtitle {
            font-size: 17px;
            font-weight: 500;
            color: #CBD5E1;
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 560px;
        }

        .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            letter-spacing: 0.01em;
            min-height: 48px;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent-primary);
            color: #0D1116;
            border: none;
        }
        .btn-primary:hover {
            background: #5ee0d0;
            color: #0D1116;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(45, 212, 191, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .hero-stats-mini {
            display: flex;
            gap: 28px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .hero-stats-mini .stat-item-mini {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stats-mini .stat-number-mini {
            font-size: 20px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--text-primary);
        }
        .hero-stats-mini .stat-label-mini {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .hero-visual {
            display: flex;
            justify-content: flex-end;
        }

        .before-after-card {
            width: 100%;
            max-width: 460px;
            background: rgba(17, 26, 36, 0.9);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .before-after-card:hover {
            border-color: var(--border-color-hover);
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.55);
        }

        .ba-header {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            background: rgba(255, 255, 255, 0.02);
        }
        .ba-header-label {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--text-muted);
        }
        .ba-vs {
            font-size: 16px;
            font-weight: 800;
            color: var(--accent-secondary);
            font-family: var(--font-mono);
        }

        .ba-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .ba-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.03);
            transition: background var(--transition-fast);
        }
        .ba-row:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .ba-row .ba-metric {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .ba-row .ba-before {
            font-size: 18px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: #94A3B8;
            text-decoration: line-through;
            text-decoration-color: rgba(244, 63, 94, 0.5);
        }
        .ba-row .ba-after {
            font-size: 18px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-primary);
        }

        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero {
                min-height: auto;
                padding-top: calc(var(--nav-height) + 48px);
                padding-bottom: 48px;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero h1 {
                font-size: 36px;
            }
            .hero-visual {
                justify-content: flex-start;
            }
            .before-after-card {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .btn {
                padding: 11px 20px;
                font-size: 14px;
                min-height: 44px;
            }
            .hero-stats-mini {
                gap: 20px;
            }
            .hero-stats-mini .stat-number-mini {
                font-size: 17px;
            }
            .ba-body {
                padding: 14px;
                gap: 10px;
            }
            .ba-row {
                padding: 8px 10px;
            }
            .ba-row .ba-metric {
                font-size: 12px;
            }
            .ba-row .ba-before,
            .ba-row .ba-after {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero {
                padding-top: calc(var(--nav-height) + 36px);
                padding-bottom: 36px;
            }
            .hero h1 {
                font-size: 26px;
                line-height: 1.25;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-desc {
                font-size: 13px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stats-mini {
                gap: 16px;
                margin-top: 20px;
            }
        }

        /* ============ SECTION COMMON ============ */
        .section {
            padding-top: var(--section-spacing);
            padding-bottom: var(--section-spacing);
        }
        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(148, 163, 184, 0.06);
            border-bottom: 1px solid rgba(148, 163, 184, 0.06);
        }
        .section-header {
            margin-bottom: 40px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-header-left {
            max-width: 680px;
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-primary);
            letter-spacing: 0.06em;
            margin-bottom: 10px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.25;
            color: var(--text-primary);
            letter-spacing: -0.005em;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-top: 12px;
            max-width: 620px;
        }

        @media (max-width: 768px) {
            .section {
                padding-top: var(--section-spacing-mobile);
                padding-bottom: var(--section-spacing-mobile);
            }
            .section-title {
                font-size: 24px;
            }
            .section-desc {
                font-size: 14px;
            }
            .section-header {
                margin-bottom: 28px;
            }
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 21px;
            }
            .section-label {
                font-size: 12px;
            }
        }

        /* ============ METRICS DASHBOARD ============ */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .metric-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .metric-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card-hover);
        }
        .metric-card:hover::after {
            opacity: 1;
        }
        .metric-number {
            font-size: 34px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }
        .metric-number .unit {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-left: 2px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .metric-card {
                padding: var(--card-padding-mobile);
            }
            .metric-number {
                font-size: 28px;
            }
        }

        /* ============ SERVICE MATRIX ============ */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .service-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card-hover);
        }
        .service-icon {
            width: 44px;
            height: 44px;
            background: var(--accent-primary-dim);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-primary);
            flex-shrink: 0;
            margin-bottom: 4px;
        }
        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.35;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 560px) {
            .service-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .service-card {
                padding: var(--card-padding-mobile);
            }
        }

        /* ============ COMPARISON ============ */
        .comparison-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 36px;
            align-items: center;
        }
        .comparison-info {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .comparison-bar-group {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .comparison-bar-item {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .comparison-bar-header {
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            font-weight: 500;
        }
        .comparison-bar-header .metric-name {
            color: var(--text-secondary);
        }
        .comparison-bar-header .metric-value {
            color: var(--accent-primary);
            font-family: var(--font-mono);
            font-weight: 700;
        }
        .comparison-bar-track {
            height: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 4px;
            overflow: hidden;
        }
        .comparison-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-primary), #0d9488);
            border-radius: 4px;
            transition: width 1.2s ease;
        }
        .comparison-bar-fill.warm {
            background: linear-gradient(90deg, var(--accent-secondary), #d97706);
        }

        @media (max-width: 1024px) {
            .comparison-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ============ TIMELINE ============ */
        .timeline {
            position: relative;
            padding-left: 32px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: var(--border-color);
            border-radius: 1px;
        }
        .timeline-item {
            position: relative;
            padding-bottom: 28px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 6px;
            width: 12px;
            height: 12px;
            background: var(--accent-primary);
            border-radius: 50%;
            box-shadow: 0 0 0 4px rgba(45, 212, 191, 0.15);
        }
        .timeline-year {
            font-size: 14px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-secondary);
            margin-bottom: 4px;
        }
        .timeline-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .timeline-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 560px;
        }

        @media (max-width: 768px) {
            .timeline {
                padding-left: 24px;
            }
            .timeline::before {
                left: 6px;
            }
            .timeline-item::before {
                left: -24px;
                width: 10px;
                height: 10px;
                box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15);
            }
        }

        /* ============ BRAND INTRO ============ */
        .brand-intro {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 40px;
            align-items: center;
        }
        .brand-intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            position: relative;
            aspect-ratio: 4/3;
        }
        .brand-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .brand-intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(45, 212, 191, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }
        .brand-intro-content {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .brand-intro-content h2 {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-primary);
        }
        .brand-intro-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }
        .brand-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 8px;
        }
        .brand-tag {
            font-size: 12px;
            font-weight: 500;
            padding: 5px 12px;
            background: var(--accent-primary-dim);
            border: 1px solid rgba(45, 212, 191, 0.22);
            color: var(--accent-primary);
            border-radius: 16px;
            letter-spacing: 0.02em;
        }

        @media (max-width: 1024px) {
            .brand-intro {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .brand-intro-image {
                aspect-ratio: 16/9;
            }
        }
        @media (max-width: 768px) {
            .brand-intro-content h2 {
                font-size: 24px;
            }
        }

        /* ============ INSIGHT ============ */
        .insight-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 36px;
            align-items: center;
        }
        .insight-chart {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
            overflow: hidden;
        }
        .insight-chart::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(180deg, rgba(45, 212, 191, 0.06) 0%, transparent 100%);
            pointer-events: none;
        }
        .insight-chart-bars {
            display: flex;
            align-items: flex-end;
            gap: 10px;
            height: 160px;
            padding-top: 20px;
        }
        .insight-bar {
            flex: 1;
            background: linear-gradient(180deg, var(--accent-primary), rgba(45, 212, 191, 0.2));
            border-radius: 6px 6px 0 0;
            min-height: 20px;
            transition: all var(--transition-base);
            position: relative;
        }
        .insight-bar:hover {
            background: linear-gradient(180deg, #5ee0d0, rgba(45, 212, 191, 0.35));
            transform: scaleY(1.04);
            transform-origin: bottom;
        }
        .insight-bar-label {
            text-align: center;
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 8px;
            font-family: var(--font-mono);
        }
        .insight-text h2 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .insight-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        @media (max-width: 1024px) {
            .insight-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .insight-chart-bars {
                height: 120px;
                gap: 6px;
            }
            .insight-text h2 {
                font-size: 22px;
            }
        }

        /* ============ NEWS LIST ============ */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .news-item:hover {
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .news-item-image {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }
        .news-item-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-item-content {
            flex: 1;
            min-width: 0;
        }
        .news-item-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-item-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }
        .news-item-badge {
            font-size: 11px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 4px;
            background: var(--accent-secondary-dim);
            color: var(--accent-secondary);
            flex-shrink: 0;
            white-space: nowrap;
        }

        @media (max-width: 768px) {
            .news-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px;
            }
            .news-item-image {
                width: 56px;
                height: 56px;
            }
            .news-item-meta {
                width: 100%;
                justify-content: flex-start;
                gap: 8px;
            }
        }

        /* ============ PLATFORM TRUST ============ */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .trust-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }
        .trust-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .trust-icon {
            font-size: 28px;
            line-height: 1;
            margin-bottom: 4px;
        }
        .trust-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .trust-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 520px) {
            .trust-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .trust-card {
                padding: 16px;
            }
        }

        /* ============ QUICK FAQ ============ */
        .quick-faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 760px;
        }
        .quick-faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .quick-faq-item:hover {
            border-color: var(--border-color-hover);
        }
        .quick-faq-question {
            width: 100%;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            text-align: left;
            transition: color var(--transition-fast);
        }
        .quick-faq-question:hover {
            color: var(--accent-primary);
        }
        .quick-faq-icon {
            font-size: 18px;
            color: var(--accent-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
            font-weight: 400;
        }
        .quick-faq-item.open .quick-faq-icon {
            transform: rotate(45deg);
        }
        .quick-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 20px;
        }
        .quick-faq-item.open .quick-faq-answer {
            max-height: 160px;
            padding-bottom: 16px;
        }
        .quick-faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ============ FAQ FULL ============ */
        .faq-layout {
            display: grid;
            grid-template-columns: 0.7fr 1.3fr;
            gap: 40px;
            align-items: start;
        }
        .faq-intro h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .faq-intro p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-color-hover);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            text-align: left;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-primary);
        }
        .faq-question .faq-number {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-primary);
            flex-shrink: 0;
            margin-right: 4px;
        }
        .faq-question .faq-toggle-icon {
            font-size: 18px;
            color: var(--accent-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
            font-weight: 400;
        }
        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding-bottom: 18px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            background: rgba(255, 255, 255, 0.03);
            padding: 12px 16px;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 1024px) {
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .faq-intro h2 {
                font-size: 24px;
            }
        }

        /* ============ EVENT CALENDAR ============ */
        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 12px;
        }
        .calendar-event {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .calendar-event:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .calendar-event-date {
            font-size: 13px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-secondary);
        }
        .calendar-event-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .calendar-event-tag {
            font-size: 12px;
            color: var(--text-secondary);
        }

        @media (max-width: 1024px) {
            .calendar-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
        }
        @media (max-width: 768px) {
            .calendar-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .calendar-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .calendar-event {
                padding: 12px;
            }
        }

        /* ============ TACTICS CARDS ============ */
        .tactics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .tactics-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .tactics-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .tactics-card-image {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .tactics-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .tactics-card:hover .tactics-card-image img {
            transform: scale(1.05);
        }
        .tactics-card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(13, 17, 22, 0.6) 100%);
            pointer-events: none;
        }
        .tactics-card-body {
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .tactics-card-tag {
            font-size: 11px;
            font-weight: 600;
            color: var(--accent-secondary);
            background: var(--accent-secondary-dim);
            padding: 3px 10px;
            border-radius: 4px;
            align-self: flex-start;
        }
        .tactics-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .tactics-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .tactics-card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
            padding-top: 8px;
        }

        @media (max-width: 1024px) {
            .tactics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 620px) {
            .tactics-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ============ TESTIMONIALS ============ */
        .testimonial-carousel {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .testimonial-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            font-style: italic;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent-primary-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .testimonial-role {
            font-size: 12px;
            font-weight: 400;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .testimonial-carousel {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 620px) {
            .testimonial-carousel {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .testimonial-card {
                padding: 16px;
            }
        }

        /* ============ CONVERT FORM ============ */
        .convert-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(148, 163, 184, 0.06);
            border-bottom: 1px solid rgba(148, 163, 184, 0.06);
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .convert-layout {
            display: grid;
            grid-template-columns: 1fr 0.8fr;
            gap: 40px;
            align-items: center;
        }
        .convert-info h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .convert-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .convert-form-wrapper {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: border-color var(--transition-base);
        }
        .convert-form-wrapper:hover {
            border-color: var(--border-color-hover);
        }
        .convert-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .convert-form label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: -6px;
        }
        .convert-form input {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            outline: none;
        }
        .convert-form input::placeholder {
            color: var(--text-muted);
        }
        .convert-form input:focus {
            border-color: var(--accent-primary);
            background: rgba(255, 255, 255, 0.06);
            box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
        }
        .convert-form .btn {
            width: 100%;
            margin-top: 4px;
        }
        .convert-note {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 10px;
            line-height: 1.5;
        }
        .form-success {
            display: none;
            padding: 14px 18px;
            background: var(--accent-primary-dim);
            border: 1px solid rgba(45, 212, 191, 0.3);
            border-radius: var(--radius-sm);
            color: var(--accent-primary);
            font-size: 14px;
            font-weight: 500;
            text-align: center;
        }
        .form-success.show {
            display: block;
        }

        @media (max-width: 1024px) {
            .convert-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .convert-section {
                padding: 44px 0;
            }
            .convert-info h2 {
                font-size: 22px;
            }
            .convert-form-wrapper {
                padding: 20px;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            padding: 40px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr;
            gap: 40px;
            margin-bottom: 28px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 9px;
            max-width: 320px;
        }
        .footer-brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand-name .logo-mark-small {
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 800;
            color: #0D1116;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
            justify-content: space-between;
        }
        .footer-bottom a {
            color: var(--text-muted);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: var(--accent-primary);
        }
        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            align-items: center;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 620px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        /* ============ SCROLL REVEAL ============ */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }

        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
            .metric-number {
                transition: none;
            }
        }

        /* ============ MISC ============ */
        .text-accent {
            color: var(--accent-primary);
        }
        .text-warm {
            color: var(--accent-secondary);
        }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }

/* roulang page: category1 */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

        /* roulang page: category1 / stats-dashboard */
        :root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        a:hover {
            color: #5ee0d0;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

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

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text-primary);
        }

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

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ CATEGORY BANNER ============ */
        .category-banner {
            padding-top: calc(var(--nav-height) + 80px);
            padding-bottom: 36px;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(45, 212, 191, 0.06), transparent 55%),
                radial-gradient(ellipse at 80% 30%, rgba(245, 158, 11, 0.04), transparent 50%);
            pointer-events: none;
        }

        .category-banner .breadcrumb {
            margin-bottom: 16px;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .category-banner .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .category-banner .breadcrumb a:hover {
            color: var(--accent-primary);
        }

        .category-banner .breadcrumb .sep {
            color: var(--text-muted);
        }

        .category-banner .breadcrumb .current {
            color: var(--accent-primary);
            font-weight: 500;
        }

        .category-banner h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: 0.01em;
        }

        .category-banner .banner-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ============ GENERIC SECTION ============ */
        .section {
            padding: var(--section-spacing) 0;
        }

        .section-title {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        /* ============ CATEGORY INTRO ============ */
        .category-intro {
            padding: 28px 0 20px;
        }

        .category-intro .intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            flex-wrap: wrap;
            transition: border-color var(--transition-base);
        }

        .category-intro .intro-card:hover {
            border-color: var(--border-color-hover);
        }

        .category-intro .intro-icon {
            width: 52px;
            height: 52px;
            background: var(--accent-primary-dim);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 22px;
            flex-shrink: 0;
        }

        .category-intro .intro-text {
            flex: 1;
            min-width: 240px;
        }

        .category-intro .intro-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ============ DATA OVERVIEW ============ */
        .data-overview {
            padding: 36px 0 28px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: center;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            height: 100%;
        }

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

        .metric-card .metric-value {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--accent-primary);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.01em;
        }

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

        /* ============ FILTER TOOLBAR ============ */
        .filter-toolbar {
            padding: 20px 0 24px;
        }

        .filter-toolbar .filter-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }

        .filter-toolbar .filter-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-right: 4px;
            font-weight: 500;
        }

        .filter-toolbar .filter-tag {
            padding: 7px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-toolbar .filter-tag:hover {
            color: var(--text-primary);
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }

        .filter-toolbar .filter-tag.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            border-color: var(--accent-primary);
            font-weight: 600;
        }

        /* ============ DATA LIST ============ */
        .data-list {
            padding: 24px 0 36px;
        }

        .data-list .list-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .data-list .list-card .card-img-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 16px;
            aspect-ratio: 16/9;
            background: var(--bg-secondary);
        }

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

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

        .data-list .list-card .card-tag-row {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .data-list .list-card .badge-tag {
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 12px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        .badge-tag.cyan {
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
        }

        .badge-tag.amber {
            background: var(--accent-secondary-dim);
            color: var(--accent-secondary);
        }

        .badge-tag.neutral {
            background: rgba(148, 163, 184, 0.12);
            color: var(--text-secondary);
        }

        .data-list .list-card h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .data-list .list-card .card-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex-grow: 1;
        }

        .data-list .list-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }

        .data-list .list-card .card-meta .meta-date {
            font-family: var(--font-mono);
        }

        .data-list .list-card .card-meta .card-arrow {
            color: var(--accent-primary);
            font-size: 14px;
            transition: transform var(--transition-fast);
        }

        .data-list .list-card:hover .card-meta .card-arrow {
            transform: translateX(4px);
        }

        .data-list .view-more-wrap {
            text-align: center;
            margin-top: 28px;
        }

        .data-list .btn-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 24px;
            transition: all var(--transition-fast);
        }

        .data-list .btn-more:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
        }

        /* ============ RELATED TOPICS ============ */
        .related-topics {
            padding: 36px 0 32px;
        }

        .related-topics .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            height: 100%;
        }

        .related-topics .topic-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-color-hover);
            box-shadow: var(--shadow-hover);
        }

        .related-topics .topic-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .related-topics .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .related-topics .topic-card:hover .topic-img img {
            transform: scale(1.04);
        }

        .related-topics .topic-body {
            padding: 18px 22px 20px;
        }

        .related-topics .topic-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .related-topics .topic-body p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 36px 0 28px;
        }

        .faq-section .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-base);
        }

        .faq-section .accordion-item:hover {
            border-color: var(--border-color-hover);
        }

        .faq-section .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 22px;
            box-shadow: none;
            border-radius: var(--radius-md) !important;
        }

        .faq-section .accordion-button:not(.collapsed) {
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
            box-shadow: none;
        }

        .faq-section .accordion-button:focus {
            box-shadow: none;
            border-color: var(--accent-primary);
        }

        .faq-section .accordion-button::after {
            filter: brightness(0) invert(0.8);
        }

        .faq-section .accordion-body {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            padding: 16px 22px 20px;
            border-top: 1px solid var(--border-color);
        }

        /* ============ CTA / SUBSCRIBE ============ */
        .cta-section {
            padding: 40px 0 56px;
        }

        .cta-section .cta-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            justify-content: space-between;
            transition: border-color var(--transition-base);
        }

        .cta-section .cta-panel:hover {
            border-color: var(--border-color-hover);
        }

        .cta-section .cta-text h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .cta-section .cta-text p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .cta-section .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }

        .cta-section .cta-form input[type="email"],
        .cta-section .cta-form input[type="text"] {
            padding: 11px 18px;
            font-size: 15px;
            color: var(--text-primary);
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            min-width: 240px;
            outline: none;
            transition: border-color var(--transition-fast);
        }

        .cta-section .cta-form input:focus {
            border-color: var(--accent-primary);
        }

        .cta-section .cta-form .btn-submit {
            padding: 11px 26px;
            font-size: 15px;
            font-weight: 600;
            color: #0D1116;
            background: var(--accent-primary);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }

        .cta-section .cta-form .btn-submit:hover {
            background: #5ee0d0;
            transform: translateY(-1px);
        }

        .cta-section .cta-form .btn-submit:active {
            transform: translateY(0);
        }

        .cta-section .cta-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 8px;
            width: 100%;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
            margin-top: 20px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .site-footer .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .site-footer .logo-mark-small {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: #0D1116;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

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

        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }

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

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

        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
        }

        .site-footer .footer-legal {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .site-footer .footer-legal a {
            color: var(--text-muted);
        }

        .site-footer .footer-legal a:hover {
            color: var(--accent-primary);
        }

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

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

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .site-header {
                width: calc(100% - 40px);
            }
            .category-banner h1 {
                font-size: 34px;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                width: calc(100% - 24px);
                top: 10px;
            }
            .main-nav {
                padding: 0 14px;
                height: 54px;
            }
            .nav-logo {
                font-size: 17px;
                gap: 8px;
            }
            .nav-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 13px;
                border-radius: 6px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                left: 12px;
                right: 12px;
                flex-direction: column;
                background: rgba(13, 17, 22, 0.98);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 12px 8px;
                gap: 2px;
                box-shadow: var(--shadow-nav);
                display: none;
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links li a {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 8px;
                text-align: center;
            }
            .category-banner {
                padding-top: calc(var(--nav-height) + 52px);
                padding-bottom: 24px;
            }
            .category-banner h1 {
                font-size: 28px;
                line-height: 1.25;
            }
            .category-banner .banner-desc {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 23px;
            }
            .metric-card .metric-value {
                font-size: 28px;
            }
            .data-list .list-card {
                padding: 18px;
            }
            .cta-section .cta-panel {
                padding: 28px 20px;
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .cta-section .cta-form input[type="email"],
            .cta-section .cta-form input[type="text"] {
                min-width: 100%;
            }
            .cta-section .cta-form .btn-submit {
                width: 100%;
                text-align: center;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .category-banner .banner-desc {
                font-size: 14px;
                line-height: 1.65;
            }
            .section-title {
                font-size: 21px;
            }
            .metric-card {
                padding: 16px 12px;
            }
            .metric-card .metric-value {
                font-size: 24px;
            }
            .metric-card .metric-label {
                font-size: 12px;
            }
            .filter-toolbar .filter-tag {
                padding: 6px 14px;
                font-size: 12px;
            }
            .data-list .list-card h3 {
                font-size: 17px;
            }
            .data-list .list-card .card-desc {
                font-size: 14px;
            }
            .cta-section .cta-text h3 {
                font-size: 19px;
            }
            .faq-section .accordion-button {
                font-size: 15px;
                padding: 15px 16px;
            }
            .faq-section .accordion-body {
                font-size: 14px;
                padding: 14px 16px 16px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }

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

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

        a:hover {
            color: #5ee0d0;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            :root {
                --section-spacing: var(--section-spacing-mobile);
                --card-padding: var(--card-padding-mobile);
            }
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text-primary);
        }

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

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 768px) {
            .site-header {
                width: calc(100% - 32px);
                top: 8px;
            }
            .main-nav {
                padding: 0 16px;
                border-radius: 14px;
            }
            .site-header.scrolled {
                top: 0;
                width: 100%;
                border-radius: 0;
            }
            .site-header.scrolled .main-nav {
                border-radius: 0;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: absolute;
                top: calc(var(--nav-height) + 8px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(17, 24, 32, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-lg);
                padding: 12px;
                gap: 4px;
                box-shadow: var(--shadow-nav);
                max-height: 0;
                overflow: hidden;
                opacity: 0;
                pointer-events: none;
                transition: max-height var(--transition-slow), opacity var(--transition-base);
            }
            .nav-links.open {
                max-height: 400px;
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
            }
        }

        /* ============ BREADCRUMB / H1 BANNER ============ */
        .section-breadcrumb {
            padding-top: calc(var(--nav-height) + 72px);
            padding-bottom: 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

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

        .breadcrumb-nav a:hover {
            color: var(--accent-primary);
        }

        .breadcrumb-nav .separator {
            color: var(--text-muted);
            user-select: none;
        }

        .breadcrumb-nav .current {
            color: var(--accent-primary);
            font-weight: 500;
        }

        .category-hero {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            margin-bottom: var(--section-spacing);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(45, 212, 191, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            letter-spacing: 0.01em;
        }

        .category-hero .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
            margin: 0;
        }

        @media (max-width: 768px) {
            .section-breadcrumb {
                padding-top: calc(var(--nav-height) + 48px);
            }
            .category-hero {
                padding: 24px 20px;
                border-radius: var(--radius-md);
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .hero-sub {
                font-size: 14px;
            }
        }

        /* ============ SECTION SHARED ============ */
        section {
            padding: 0 0 var(--section-spacing) 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            letter-spacing: 0.01em;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 32px 0;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 24px;
            }
        }

        /* ============ INTRO SECTION ============ */
        .intro-card {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            align-items: center;
        }

        .intro-card .intro-text p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            margin: 0;
        }

        .intro-card .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .intro-card .intro-stats .stat-mini {
            text-align: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px 12px;
        }

        .intro-card .intro-stats .stat-mini .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-primary);
            font-family: var(--font-mono);
            line-height: 1.2;
        }

        .intro-card .intro-stats .stat-mini .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .intro-card {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 20px;
            }
            .intro-card .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .intro-card .intro-stats .stat-mini .stat-num {
                font-size: 22px;
            }
        }

        /* ============ FILTER TOOLBAR ============ */
        .filter-toolbar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            margin-bottom: 28px;
        }

        .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-right: 4px;
            white-space: nowrap;
        }

        .filter-chip {
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-chip:hover {
            color: var(--text-primary);
            border-color: var(--border-color-hover);
            background: rgba(255, 255, 255, 0.03);
        }

        .filter-chip.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            border-color: var(--border-color-hover);
            font-weight: 600;
        }

        .filter-sort {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-sort select {
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 7px 12px;
            font-size: 13px;
            cursor: pointer;
            transition: border-color var(--transition-fast);
        }

        .filter-sort select:focus {
            outline: none;
            border-color: var(--border-color-hover);
        }

        @media (max-width: 768px) {
            .filter-toolbar {
                padding: 10px 12px;
                gap: 6px;
            }
            .filter-sort {
                margin-left: 0;
                width: 100%;
                margin-top: 4px;
            }
            .filter-sort select {
                flex: 1;
            }
        }

        /* ============ TRACKING LIST ============ */
        .tracking-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .tracking-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 0;
            transition: all var(--transition-base);
        }

        .tracking-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .tracking-card .card-img {
            width: 160px;
            min-height: 180px;
            flex-shrink: 0;
            object-fit: cover;
            background: var(--bg-secondary);
        }

        .tracking-card .card-body {
            padding: 20px 20px 20px 0;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .tracking-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-secondary);
            background: var(--accent-secondary-dim);
            padding: 3px 10px;
            border-radius: 12px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .tracking-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            line-height: 1.35;
        }

        .tracking-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0 0 14px 0;
            flex: 1;
        }

        .tracking-card .card-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .tracking-card .card-arrow {
            color: var(--accent-primary);
            font-size: 18px;
            margin-left: auto;
            transition: transform var(--transition-fast);
        }

        .tracking-card:hover .card-arrow {
            transform: translateX(4px);
        }

        .list-more {
            display: flex;
            justify-content: center;
            margin-top: 28px;
        }

        .btn-outline {
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-primary);
            background: transparent;
            border: 1px solid var(--border-color-hover);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .btn-outline:hover {
            background: var(--accent-primary-dim);
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            transform: translateY(-1px);
        }

        @media (max-width: 1024px) {
            .tracking-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .tracking-card {
                flex-direction: column;
            }
            .tracking-card .card-img {
                width: 100%;
                min-height: auto;
                aspect-ratio: 16/9;
                max-height: 180px;
            }
            .tracking-card .card-body {
                padding: 16px 18px 18px 18px;
            }
            .tracking-card .card-title {
                font-size: 16px;
            }
        }

        /* ============ DATA TREND ============ */
        .trend-panel {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            position: relative;
            overflow: hidden;
            margin-top: 8px;
        }

        .trend-panel::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .trend-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .trend-metrics {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .trend-metric-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
        }

        .trend-metric-item .metric-value {
            font-size: 30px;
            font-weight: 700;
            color: var(--accent-primary);
            font-family: var(--font-mono);
            line-height: 1.2;
        }

        .trend-metric-item .metric-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        .trend-metric-item .metric-delta {
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-secondary);
            margin-top: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }

        .trend-note {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .trend-note p {
            margin: 0 0 12px 0;
        }

        .trend-note .trend-highlight {
            color: var(--accent-primary);
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .trend-panel {
                padding: 20px 18px;
                border-radius: var(--radius-md);
            }
            .trend-layout {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .trend-metrics {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .trend-metric-item {
                padding: 14px 10px;
            }
            .trend-metric-item .metric-value {
                font-size: 24px;
            }
        }

        /* ============ RELATED TOPICS ============ */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .topic-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .topic-card .topic-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-secondary);
        }

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

        .topic-card .topic-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            line-height: 1.4;
        }

        .topic-card .topic-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .topic-card .topic-arrow {
            color: var(--accent-primary);
            font-size: 16px;
            margin-left: auto;
        }

        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ FAQ ============ */
        .faq-layout {
            display: grid;
            grid-template-columns: 0.7fr 1.3fr;
            gap: 36px;
            align-items: start;
        }

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

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: all var(--transition-fast);
            gap: 12px;
        }

        .faq-question:hover {
            color: var(--accent-primary);
        }

        .faq-icon {
            font-size: 20px;
            color: var(--accent-primary);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            font-weight: 400;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

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

        @media (max-width: 768px) {
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px 16px;
            }
        }

        /* ============ CTA / SUBSCRIBE ============ */
        .subscribe-cta {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 28px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .subscribe-cta::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -5%;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(45, 212, 191, 0.07), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .subscribe-cta .cta-text {
            position: relative;
            z-index: 1;
        }

        .subscribe-cta .cta-text h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }

        .subscribe-cta .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            position: relative;
            z-index: 1;
            min-width: 320px;
        }

        .subscribe-form input {
            flex: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-primary);
            min-width: 0;
            transition: border-color var(--transition-fast);
        }

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

        .subscribe-form input:focus {
            outline: none;
            border-color: var(--accent-primary);
        }

        .btn-primary {
            padding: 12px 24px;
            font-size: 14px;
            font-weight: 600;
            color: #0D1116;
            background: var(--accent-primary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .btn-primary:hover {
            background: #5ee0d0;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
        }

        @media (max-width: 768px) {
            .subscribe-cta {
                grid-template-columns: 1fr;
                padding: 24px 20px;
                gap: 16px;
                border-radius: var(--radius-md);
            }
            .subscribe-form {
                min-width: 0;
                flex-direction: column;
            }
            .subscribe-cta .cta-text h3 {
                font-size: 18px;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px 0;
            margin-top: var(--section-spacing);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .logo-mark-small {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 14px 0;
        }

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

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

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

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

        .footer-legal {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .footer-legal a:hover {
            color: var(--accent-primary);
        }

        .footer-bottom > div:last-child {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
        }

        .footer-bottom > div:last-child a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-bottom > div:last-child a:hover {
            color: var(--accent-primary);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 32px 0 20px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-legal {
                gap: 8px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        a:hover {
            color: #5ee0d0;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text-primary);
        }

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

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

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

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

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

        /* ============ BREADCRUMB ============ */
        .breadcrumb-wrapper {
            padding-top: 100px;
            padding-bottom: 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--text-muted);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--accent-primary);
            font-weight: 500;
        }

        /* ============ CATEGORY HERO ============ */
        .category-hero {
            position: relative;
            margin-top: 24px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: var(--bg-secondary);
            min-height: 320px;
            display: flex;
            align-items: flex-end;
        }

        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.45;
        }

        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 17, 22, 0.35) 0%, rgba(13, 17, 22, 0.75) 55%, rgba(13, 17, 22, 0.96) 100%);
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px 40px;
            width: 100%;
        }

        .category-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            border: 1px solid rgba(45, 212, 191, 0.25);
            margin-bottom: 16px;
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.15;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            margin-bottom: 14px;
        }

        .category-hero .hero-desc {
            font-size: 17px;
            line-height: 1.7;
            color: #C7D0DC;
            max-width: 680px;
        }

        /* ============ CATEGORY INTRO ============ */
        .category-intro {
            margin-top: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 32px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .category-intro .intro-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
            font-size: 20px;
            flex-shrink: 0;
        }

        .category-intro p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* ============ FILTER TOOLBAR ============ */
        .filter-toolbar {
            margin-top: 32px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .filter-toolbar .filter-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-right: 4px;
            white-space: nowrap;
        }

        .filter-toolbar .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 7px 18px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .filter-toolbar .filter-tag:hover {
            color: var(--text-primary);
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }

        .filter-toolbar .filter-tag.active {
            color: var(--accent-primary);
            border-color: var(--border-color-hover);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        /* ============ GUIDE GRID / CARDS ============ */
        .guide-section {
            margin-top: 32px;
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .guide-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

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

        .guide-card:hover .card-image img {
            transform: scale(1.04);
        }

        .guide-card .card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 17, 22, 0.85);
            backdrop-filter: blur(8px);
            color: var(--accent-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 14px;
            border: 1px solid rgba(45, 212, 191, 0.3);
        }

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

        .guide-card .card-body h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .guide-card .card-body .card-summary {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }

        .guide-card .card-meta .card-date {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .guide-card .card-meta .card-arrow {
            color: var(--accent-primary);
            transition: transform var(--transition-fast);
        }

        .guide-card:hover .card-meta .card-arrow {
            transform: translateX(4px);
        }

        /* ============ DATA SUMMARY ============ */
        .data-summary-section {
            margin-top: 56px;
        }

        .data-summary {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

        .data-summary .summary-title h2 {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .data-summary .summary-title p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .data-summary .summary-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .data-summary .stat-item {
            text-align: center;
            padding: 18px 12px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .data-summary .stat-item .stat-number {
            font-family: var(--font-mono);
            font-size: 34px;
            font-weight: 700;
            color: var(--accent-primary);
            line-height: 1.2;
        }

        .data-summary .stat-item .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ============ TREND NOTE ============ */
        .trend-note {
            margin-top: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--accent-secondary-dim);
            border: 1px solid rgba(245, 158, 11, 0.22);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .trend-note .trend-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-secondary);
            flex-shrink: 0;
            animation: pulse-dot 2s ease-in-out infinite;
        }

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

        /* ============ RELATED TOPICS ============ */
        .related-section {
            margin-top: 56px;
        }

        .related-section .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .related-section .section-head h2 {
            font-size: 26px;
            font-weight: 600;
            line-height: 1.3;
        }

        .related-section .section-head .view-more {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
        }

        .related-section .section-head .view-more:hover {
            color: #5ee0d0;
        }

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

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

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

        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 8;
            object-fit: cover;
        }

        .related-card .related-body {
            padding: 16px 20px;
        }

        .related-card .related-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 6px;
        }

        .related-card .related-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ============ FAQ ============ */
        .faq-section {
            margin-top: 56px;
        }

        .faq-section .section-head h2 {
            font-size: 26px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 24px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .faq-item .faq-question:hover {
            color: var(--accent-primary);
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: transform var(--transition-base), color var(--transition-fast);
            font-size: 18px;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-primary);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        .faq-item .faq-answer p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
        }

        /* ============ SUBSCRIBE CTA ============ */
        .subscribe-cta {
            margin-top: 56px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .subscribe-cta .cta-text h2 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 6px;
        }

        .subscribe-cta .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .subscribe-cta .cta-form {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .subscribe-cta .cta-form input {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            font-size: 14px;
            color: var(--text-primary);
            min-width: 260px;
            transition: border-color var(--transition-fast);
            outline: none;
        }

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

        .subscribe-cta .cta-form input:focus {
            border-color: var(--border-color-hover);
        }

        .subscribe-cta .cta-form button {
            background: var(--accent-primary);
            color: #0D1116;
            font-weight: 600;
            font-size: 14px;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            transition: background var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }

        .subscribe-cta .cta-form button:hover {
            background: #5ee0d0;
            transform: translateY(-1px);
        }

        .subscribe-cta .cta-form button:active {
            transform: translateY(0);
        }

        .subscribe-cta .cta-disclaimer {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: left;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            margin-top: 80px;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }

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

        .footer-brand .footer-brand-name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-brand .logo-mark-small {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

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

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

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

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

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

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

        .footer-legal a:hover {
            color: var(--accent-primary);
        }

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

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

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

            .category-hero h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                width: calc(100% - 32px);
                top: 10px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-links {
                position: absolute;
                top: calc(var(--nav-height) + 10px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: rgba(17, 24, 32, 0.98);
                backdrop-filter: blur(16px);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-nav);
                padding: 8px;
                display: none;
            }

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

            .nav-links li a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }

            .category-hero {
                min-height: 240px;
            }

            .category-hero .hero-content {
                padding: 32px 24px 28px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }

            .category-intro {
                padding: 20px 22px;
                flex-direction: column;
                gap: 12px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .data-summary {
                padding: 24px 22px;
            }

            .data-summary .summary-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }

            .data-summary .stat-item .stat-number {
                font-size: 24px;
            }

            .subscribe-cta {
                padding: 28px 22px;
                flex-direction: column;
                align-items: flex-start;
            }

            .subscribe-cta .cta-form input {
                min-width: 100%;
                width: 100%;
            }

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

            .subscribe-cta .cta-form button {
                width: 100%;
            }

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

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

            .footer-legal {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .breadcrumb-wrapper {
                padding-top: 82px;
            }

            .section-spacing {
                padding: 0;
            }
        }

        @media (max-width: 520px) {
            .data-summary .summary-stats {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .filter-toolbar .filter-tag {
                padding: 6px 14px;
                font-size: 12px;
            }

            .guide-card .card-body h3 {
                font-size: 17px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }

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

        a {
            color: var(--accent-primary);
            text-decoration: none;
            transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        a:hover {
            color: #5ee0d0;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        section {
            padding-top: var(--section-spacing);
            padding-bottom: var(--section-spacing);
            position: relative;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-primary);
            padding: 6px 14px;
            background: var(--accent-primary-dim);
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: 32px;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base), width var(--transition-base), max-width var(--transition-base);
        }

        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
            border-bottom: 1px solid var(--border-color);
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text-primary);
        }

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

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

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

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

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

        /* ============ BREADCRUMB / PAGE H1 BANNER ============ */
        .page-banner {
            padding-top: calc(var(--nav-height) + 96px);
            padding-bottom: 56px;
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 17, 22, 0.72) 0%, rgba(13, 17, 22, 0.92) 65%, var(--bg-primary) 100%);
            z-index: 1;
        }

        .page-banner .banner-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            opacity: 0.45;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

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

        .breadcrumb-nav a:hover {
            color: var(--accent-primary);
        }

        .breadcrumb-sep {
            color: var(--text-muted);
            font-size: 12px;
        }

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

        .page-banner h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .page-banner .banner-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* ============ CATEGORY INTRO ============ */
        .category-intro {
            background: var(--bg-primary);
            padding-top: 20px;
            padding-bottom: 12px;
        }

        .category-intro .intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            display: flex;
            align-items: flex-start;
            gap: 20px;
            transition: border-color var(--transition-base), background var(--transition-base);
        }

        .category-intro .intro-card:hover {
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }

        .intro-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-primary-dim);
            border: 1px solid rgba(45, 212, 191, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-primary);
            flex-shrink: 0;
        }

        .intro-text h2 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .intro-text p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* ============ FILTER TOOLBAR ============ */
        .filter-toolbar {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            margin-bottom: 12px;
        }

        .filter-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 14px;
        }

        .filter-row:last-child {
            margin-bottom: 0;
        }

        .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            min-width: 64px;
            flex-shrink: 0;
        }

        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .filter-tag {
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-tag:hover {
            color: var(--text-primary);
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }

        .filter-tag.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            border-color: rgba(45, 212, 191, 0.4);
            font-weight: 600;
        }

        .filter-sort-select {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            padding: 7px 14px;
            font-size: 13px;
            min-width: 140px;
            transition: border-color var(--transition-fast);
        }

        .filter-sort-select:focus {
            border-color: var(--border-color-hover);
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
        }

        /* ============ PLAYER CARDS ============ */
        .player-list .player-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .player-list .player-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }

        .player-card-img-wrap {
            position: relative;
            padding-top: 56.25%;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .player-card-img-wrap img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .player-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 17, 22, 0.85);
            color: var(--accent-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 16px;
            border: 1px solid rgba(45, 212, 191, 0.35);
            backdrop-filter: blur(8px);
        }

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

        .player-card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.3;
        }

        .player-card-team {
            font-size: 13px;
            color: var(--accent-secondary);
            font-weight: 500;
            margin-bottom: 10px;
        }

        .player-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
            flex: 1;
        }

        .player-card-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }

        .player-stat-item {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .player-stat-value {
            color: var(--accent-primary);
            font-weight: 700;
            font-family: var(--font-mono);
        }

        /* ============ DATA SUMMARY ============ */
        .data-summary {
            background: var(--bg-secondary);
        }

        .data-summary .summary-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .summary-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: border-color var(--transition-base), transform var(--transition-base);
        }

        .summary-card:hover {
            border-color: var(--border-color-hover);
            transform: translateY(-3px);
        }

        .summary-number {
            font-size: 36px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .summary-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .trend-line {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
            padding: 18px 22px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
        }

        .trend-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--accent-secondary-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 16px;
            flex-shrink: 0;
        }

        .trend-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .trend-text strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ============ RELATED TOPICS ============ */
        .related-topics .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-topics .topic-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-color-hover);
        }

        .topic-img-wrap {
            position: relative;
            padding-top: 52%;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .topic-img-wrap img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .topic-card:hover .topic-img-wrap img {
            transform: scale(1.05);
        }

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

        .topic-tag {
            font-size: 12px;
            color: var(--accent-secondary);
            font-weight: 600;
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .topic-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .topic-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 12px;
            flex: 1;
        }

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

        .topic-link:hover {
            color: #5ee0d0;
            gap: 10px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: var(--bg-secondary);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 40px;
            align-items: start;
        }

        .faq-list .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            user-select: none;
            transition: color var(--transition-fast);
            width: 100%;
            text-align: left;
            background: none;
            border: none;
        }

        .faq-question:hover {
            color: var(--accent-primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--accent-primary-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent-primary);
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 240px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }

        /* ============ SUBSCRIBE CTA ============ */
        .subscribe-cta {
            background: var(--bg-primary);
        }

        .subscribe-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            transition: border-color var(--transition-base);
        }

        .subscribe-box:hover {
            border-color: var(--border-color-hover);
        }

        .subscribe-info h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .subscribe-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }

        .subscribe-input {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            font-size: 14px;
            color: var(--text-primary);
            min-width: 260px;
            transition: border-color var(--transition-fast);
        }

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

        .subscribe-input:focus {
            border-color: var(--border-color-hover);
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
        }

        .btn-primary-accent {
            background: var(--accent-primary);
            color: #0D1116;
            font-weight: 700;
            font-size: 14px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary-accent:hover {
            background: #5ee0d0;
            color: #0D1116;
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(45, 212, 191, 0.3);
        }

        .btn-primary-accent:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
            width: 100%;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #090C10;
            border-top: 1px solid var(--border-color);
            padding-top: 56px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .logo-mark-small {
            width: 30px;
            height: 30px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 7px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .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-secondary);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }

        .footer-legal {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .footer-legal a:hover {
            color: var(--accent-primary);
        }

        .footer-bottom-links {
            display: flex;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

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

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .data-summary .summary-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            section {
                padding-top: var(--section-spacing-mobile);
                padding-bottom: var(--section-spacing-mobile);
            }

            .site-header {
                top: 10px;
                width: calc(100% - 32px);
            }

            .main-nav {
                height: 52px;
                border-radius: 14px;
                padding: 0 14px;
            }

            .nav-logo {
                font-size: 17px;
                gap: 8px;
            }

            .nav-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 14px;
                border-radius: 7px;
            }

            .nav-links {
                position: fixed;
                top: 66px;
                left: 16px;
                right: 16px;
                flex-direction: column;
                background: rgba(17, 24, 32, 0.98);
                border: 1px solid var(--border-color);
                border-radius: 14px;
                padding: 10px;
                gap: 2px;
                box-shadow: var(--shadow-nav);
                transform: translateY(-12px);
                opacity: 0;
                pointer-events: none;
                transition: transform var(--transition-base), opacity var(--transition-base);
                z-index: 999;
                max-height: calc(100vh - 90px);
                overflow-y: auto;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links li {
                width: 100%;
            }

            .nav-links li a {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 10px;
                white-space: normal;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding-top: calc(var(--nav-height) + 72px);
                padding-bottom: 40px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .page-banner .banner-desc {
                font-size: 15px;
            }

            .breadcrumb-nav {
                font-size: 13px;
                margin-bottom: 14px;
            }

            .category-intro .intro-card {
                flex-direction: column;
                gap: 14px;
                padding: 20px;
            }

            .filter-toolbar {
                padding: 16px 18px;
            }

            .filter-row {
                gap: 8px;
                margin-bottom: 10px;
            }

            .filter-label {
                min-width: 52px;
                font-size: 12px;
            }

            .filter-tag {
                padding: 5px 11px;
                font-size: 12px;
            }

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

            .summary-card {
                padding: 16px 12px;
            }

            .summary-number {
                font-size: 28px;
            }

            .summary-label {
                font-size: 12px;
            }

            .trend-line {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 14px 16px;
                margin-top: 16px;
            }

            .subscribe-box {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
                gap: 20px;
            }

            .subscribe-form {
                flex-direction: column;
                width: 100%;
            }

            .subscribe-input {
                width: 100%;
                min-width: 0;
            }

            .btn-primary-accent {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .footer-brand {
                grid-column: span 1;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .footer-legal {
                justify-content: center;
            }

            .footer-bottom-links {
                justify-content: center;
            }

            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner .banner-desc {
                font-size: 14px;
            }

            .filter-toolbar {
                padding: 12px 14px;
                border-radius: var(--radius-md);
            }

            .filter-tag {
                padding: 4px 9px;
                font-size: 11px;
                border-radius: 14px;
            }

            .filter-sort-select {
                min-width: 110px;
                padding: 5px 10px;
                font-size: 12px;
            }

            .player-card-body {
                padding: 14px 16px 16px;
            }

            .player-card-title {
                font-size: 17px;
            }

            .player-card-stats {
                gap: 6px;
            }

            .player-stat-item {
                font-size: 11px;
            }

            .data-summary .summary-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0D1116;
            --bg-secondary: #111820;
            --bg-card: #111A24;
            --bg-card-hover: #152230;
            --accent-primary: #2DD4BF;
            --accent-primary-dim: rgba(45, 212, 191, 0.14);
            --accent-secondary: #F59E0B;
            --accent-secondary-dim: rgba(245, 158, 11, 0.12);
            --text-primary: #F8FAFC;
            --text-secondary: #A0AEC0;
            --text-muted: #64748B;
            --border-color: rgba(148, 163, 184, 0.18);
            --border-color-hover: rgba(45, 212, 191, 0.45);
            --radius-lg: 18px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
            --container-max: 1200px;
            --nav-height: 60px;
            --section-spacing: 80px;
            --section-spacing-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ee0d0;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 64px);
            max-width: var(--container-max);
            z-index: 1000;
            transition: top var(--transition-base), border-radius var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            top: 0;
            width: 100%;
            max-width: 100%;
            border-radius: 0 0 8px 8px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            background: rgba(17, 24, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: var(--shadow-nav);
            transition: border-radius var(--transition-base), background var(--transition-base);
        }
        .site-header.scrolled .main-nav {
            border-radius: 0;
            background: rgba(13, 17, 22, 0.96);
            border-left: none;
            border-right: none;
            border-top: none;
        }
        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--text-primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-links li a.active {
            color: var(--accent-primary);
            background: var(--accent-primary-dim);
            font-weight: 600;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--accent-primary-dim);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }
        .nav-toggle.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.is-open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(17, 24, 32, 0.98);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 12px;
                box-shadow: var(--shadow-nav);
            }
            .nav-links.is-open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 15px;
            }
            .nav-toggle {
                display: flex;
            }
        }
        @media (max-width: 520px) {
            .site-header {
                top: 8px;
                width: calc(100% - 32px);
            }
            .main-nav {
                padding: 0 14px;
                height: 52px;
                border-radius: 14px;
            }
            .nav-logo {
                font-size: 17px;
                gap: 8px;
            }
            .nav-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 14px;
                border-radius: 6px;
            }
        }

        /* ============ BREADCRUMB / PAGE HEADER ============ */
        .page-head {
            padding-top: 130px;
            padding-bottom: 36px;
            background-color: var(--bg-primary);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--accent-primary);
            font-weight: 500;
        }
        .page-head h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .page-head .head-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .page-head {
                padding-top: 105px;
                padding-bottom: 24px;
            }
            .page-head h1 {
                font-size: 28px;
            }
            .page-head .head-sub {
                font-size: 15px;
            }
        }

        /* ============ SECTION COMMON ============ */
        .section {
            padding: var(--section-spacing-mobile) 0;
        }
        @media (min-width: 769px) {
            .section {
                padding: var(--section-spacing) 0;
            }
        }
        .section-alt {
            background: var(--bg-secondary);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
            color: var(--accent-primary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 18px;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 28px;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            .section-desc {
                font-size: 14px;
            }
        }

        /* ============ FILTER TOOLBAR ============ */
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 16px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 24px;
        }
        .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-right: 4px;
        }
        .filter-tag {
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: var(--text-primary);
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
        }
        .filter-tag.active {
            color: #0D1116;
            background: var(--accent-primary);
            border-color: var(--accent-primary);
            font-weight: 600;
        }
        .filter-sort {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .filter-sort select {
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 7px 12px;
            font-size: 13px;
            cursor: pointer;
            transition: border-color var(--transition-fast);
            appearance: auto;
        }
        .filter-sort select:focus {
            outline: 2px solid var(--accent-primary);
            outline-offset: 1px;
            border-color: var(--border-color-hover);
        }

        /* ============ NEWS LIST / CARDS ============ */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-card {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: all var(--transition-base);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .news-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-color-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .news-card .news-thumb {
            width: 160px;
            min-width: 160px;
            height: 110px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }
        .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.03);
        }
        .news-card .news-body {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
            flex-wrap: wrap;
        }
        .news-card .news-tag {
            padding: 2px 10px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 12px;
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
            white-space: nowrap;
        }
        .news-card .news-tag.orange {
            background: var(--accent-secondary-dim);
            color: var(--accent-secondary);
        }
        .news-card h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 6px;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        .news-card .news-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-link {
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
            align-self: flex-start;
        }
        .news-card .news-link::after {
            content: '→';
            transition: transform var(--transition-fast);
        }
        .news-card:hover .news-link::after {
            transform: translateX(4px);
        }
        .news-card .news-link:hover {
            color: #5ee0d0;
        }
        .view-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            background: transparent;
            transition: all var(--transition-fast);
            margin-top: 20px;
            white-space: nowrap;
        }
        .view-more-btn:hover {
            color: var(--accent-primary);
            border-color: var(--accent-primary);
            background: var(--accent-primary-dim);
        }
        @media (max-width: 768px) {
            .news-card {
                flex-direction: column;
                gap: 12px;
                padding: 14px;
            }
            .news-card .news-thumb {
                width: 100%;
                min-width: auto;
                height: 160px;
            }
            .news-card h3 {
                font-size: 16px;
            }
            .news-card .news-excerpt {
                font-size: 13px;
            }
        }

        /* ============ DATA SUMMARY ============ */
        .data-summary {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 32px;
        }
        .data-summary-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: all var(--transition-base);
        }
        .data-summary-card:hover {
            border-color: var(--border-color-hover);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-hover);
        }
        .data-summary-card .num {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--accent-primary);
            margin-bottom: 6px;
        }
        .data-summary-card .label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .data-summary {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .data-summary-card .num {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .data-summary {
                grid-template-columns: 1fr;
            }
        }

        /* ============ RELATED TOPICS ============ */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .topic-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .topic-card:hover {
            border-color: var(--border-color-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .topic-card .topic-img {
            height: 150px;
            overflow: hidden;
        }
        .topic-card .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .topic-card:hover .topic-img img {
            transform: scale(1.04);
        }
        .topic-card .topic-body {
            padding: 16px 18px;
        }
        .topic-card .topic-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .topic-card .topic-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .topics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .topic-card .topic-img {
                height: 110px;
            }
        }
        @media (max-width: 520px) {
            .topics-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 820px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-color-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: all var(--transition-fast);
        }
        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--accent-primary-dim);
            color: var(--accent-primary);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }
        .faq-item.is-open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.is-open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 20px;
        }
        .faq-answer p {
            margin-bottom: 0;
        }

        /* ============ CTA FORM ============ */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, var(--accent-primary-dim), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .cta-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 0;
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-primary);
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            outline: none;
        }
        .cta-form input::placeholder {
            color: var(--text-muted);
        }
        .cta-form input:focus {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 3px var(--accent-primary-dim);
        }
        .cta-form button {
            padding: 12px 28px;
            font-size: 14px;
            font-weight: 600;
            color: #0D1116;
            background: var(--accent-primary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-fast);
        }
        .cta-form button:hover {
            background: #3ae0cc;
            box-shadow: 0 4px 16px rgba(45, 212, 191, 0.3);
        }
        .cta-form button:active {
            transform: scale(0.97);
        }
        .form-tip {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
        }
        @media (max-width: 768px) {
            .cta-card {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 24px 20px;
            }
            .cta-card h2 {
                font-size: 20px;
            }
            .cta-form {
                flex-direction: column;
                gap: 10px;
            }
            .cta-form button {
                width: 100%;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand-name {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .logo-mark-small {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--accent-primary), #0d9488);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            color: #0D1116;
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-legal {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-legal a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-legal a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-primary);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ============ SCROLL REVEAL ============ */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity var(--transition-slow), transform var(--transition-slow);
        }
        .reveal.is-visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* 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}