/* roulang page: index */
:root {
            --primary: #FF6B00;
            --primary-dark: #E55D00;
            --primary-light: #FF8533;
            --secondary: #1A1A2E;
            --secondary-light: #2D2D44;
            --accent: #FFD700;
            --bg-dark: #0F0F1A;
            --bg-card: #1A1A2E;
            --bg-section: #14142A;
            --text-light: #FFFFFF;
            --text-muted: #B0B0C8;
            --text-dim: #6E6E8A;
            --border-color: rgba(255, 107, 0, 0.15);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 40px rgba(255, 107, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--secondary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-brand {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.5px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            font-weight: 900;
            flex-shrink: 0;
        }
        .logo span {
            background: linear-gradient(135deg, var(--text-light), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 24px;
            padding: 6px 16px 6px 20px;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            background: rgba(255, 107, 0, 0.06);
            box-shadow: 0 0 20px rgba(255, 107, 0, 0.08);
        }
        .search-box input {
            background: transparent;
            color: var(--text-light);
            font-size: 14px;
            padding: 6px 0;
            width: 160px;
        }
        .search-box input::placeholder {
            color: var(--text-dim);
        }
        .search-box button {
            color: var(--text-muted);
            font-size: 14px;
            padding: 4px 0 4px 12px;
            transition: var(--transition);
        }
        .search-box button:hover {
            color: var(--primary);
        }

        .header-channel {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .header-channel::-webkit-scrollbar {
            display: none;
        }

        .channel-item {
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .channel-item:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.05);
        }
        .channel-item.active {
            color: var(--text-light);
            background: rgba(255, 107, 0, 0.15);
        }
        .channel-item.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .mobile-menu-btn {
            display: none;
            color: var(--text-light);
            font-size: 22px;
            padding: 4px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        @media (max-width: 768px) {
            .search-box input {
                width: 100px;
            }
            .search-box {
                padding: 4px 12px 4px 16px;
            }
            .mobile-menu-btn {
                display: block;
            }
            .header-channel {
                display: none;
                flex-direction: column;
                gap: 2px;
                padding: 8px 0 16px;
                border-top: 1px solid var(--border-color);
            }
            .header-channel.open {
                display: flex;
            }
            .channel-item {
                width: 100%;
                padding: 10px 16px;
                border-radius: 10px;
            }
            .channel-item.active::after {
                display: none;
            }
            .channel-item.active {
                background: rgba(255, 107, 0, 0.12);
            }
            .logo {
                font-size: 18px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .search-box input {
                width: 80px;
                font-size: 13px;
            }
            .header-actions {
                gap: 8px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 80px 0 100px;
            overflow: hidden;
            background: linear-gradient(160deg, var(--bg-dark) 0%, var(--secondary) 60%, #0D0D1A 100%);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255, 107, 0, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.06) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 107, 0, 0.12);
            border: 1px solid rgba(255, 107, 0, 0.2);
            border-radius: 20px;
            padding: 6px 18px 6px 10px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary-light);
            width: fit-content;
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(0.8);
            }
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 480px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 8px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 24px rgba(255, 107, 0, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(255, 107, 0, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-light);
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            border: 1.5px solid rgba(255, 255, 255, 0.15);
            transition: var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(255, 107, 0, 0.06);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

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

        .hero-card-stack {
            width: 100%;
            max-width: 420px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: var(--transition);
            transform-origin: center;
        }
        .hero-card:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-2px);
        }
        .hero-card:nth-child(1) {
            transform: rotate(-2deg) translateX(-8px);
        }
        .hero-card:nth-child(2) {
            transform: rotate(1deg) translateX(8px);
        }
        .hero-card:nth-child(3) {
            transform: rotate(-1deg) translateX(-4px);
        }

        .hero-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
            background: rgba(255, 107, 0, 0.12);
            color: var(--primary-light);
        }
        .hero-card-icon.gold {
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent);
        }
        .hero-card-icon.blue {
            background: rgba(66, 133, 244, 0.12);
            color: #4285F4;
        }

        .hero-card-text h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .hero-card-text p {
            font-size: 13px;
            color: var(--text-dim);
        }

        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 40px;
            }
            .hero-grid {
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: 56px 0 72px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-visual {
                order: -1;
            }
            .hero-card-stack {
                max-width: 100%;
            }
            .hero-card:nth-child(1),
            .hero-card:nth-child(2),
            .hero-card:nth-child(3) {
                transform: none;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary,
            .btn-outline {
                justify-content: center;
                width: 100%;
            }
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header h2 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            margin: 16px auto 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 24px;
            }
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            border-color: rgba(255, 107, 0, 0.25);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 20px;
            background: rgba(255, 107, 0, 0.08);
            color: var(--primary-light);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(255, 107, 0, 0.15);
            transform: scale(1.05);
        }
        .feature-icon.gold {
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent);
        }
        .feature-card:hover .feature-icon.gold {
            background: rgba(255, 215, 0, 0.15);
        }
        .feature-icon.blue {
            background: rgba(66, 133, 244, 0.08);
            color: #4285F4;
        }
        .feature-card:hover .feature-icon.blue {
            background: rgba(66, 133, 244, 0.15);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

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

        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== Content List (CMS) ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px 28px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(255, 107, 0, 0.2);
        }

        .content-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-dim);
        }
        .content-meta .cat-tag {
            background: rgba(255, 107, 0, 0.1);
            color: var(--primary-light);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
        }
        .content-meta .cat-tag.gold {
            background: rgba(255, 215, 0, 0.1);
            color: var(--accent);
        }
        .content-meta .cat-tag.blue {
            background: rgba(66, 133, 244, 0.1);
            color: #4285F4;
        }

        .content-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            transition: var(--transition);
        }
        .content-card:hover h3 {
            color: var(--primary-light);
        }

        .content-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary-light);
            margin-top: 4px;
            transition: var(--transition);
        }
        .content-card .read-more i {
            font-size: 12px;
            transition: var(--transition);
        }
        .content-card:hover .read-more i {
            transform: translateX(4px);
        }

        .empty-list {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-dim);
            font-size: 16px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }

        @media (max-width: 768px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .content-card {
                padding: 20px;
            }
        }

        /* ===== Game Categories ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            border-color: rgba(255, 107, 0, 0.2);
        }

        .category-card .cat-icon {
            font-size: 40px;
            margin-bottom: 16px;
            display: block;
        }
        .category-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .category-card p {
            font-size: 13px;
            color: var(--text-dim);
        }
        .category-card .count-badge {
            display: inline-block;
            margin-top: 12px;
            background: rgba(255, 107, 0, 0.1);
            color: var(--primary-light);
            padding: 2px 14px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
        }

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

        @media (max-width: 520px) {
            .categories-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(255, 107, 0, 0.2);
            background: rgba(255, 107, 0, 0.03);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-number {
                font-size: 32px;
            }
            .stat-item {
                padding: 24px 12px;
            }
        }

        /* ===== How It Works ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 20px;
            color: #fff;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

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

        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .step-card {
                padding: 28px 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255, 107, 0, 0.15);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-light);
            text-align: left;
            background: transparent;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-dim);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 14px;
            }
            .faq-answer.open {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, var(--secondary), var(--bg-dark));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            text-align: center;
            padding: 60px 24px;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 32px;
        }
        .cta-box .btn-primary {
            font-size: 18px;
            padding: 16px 40px;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 16px;
            }
            .cta-box h2 {
                font-size: 28px;
            }
            .cta-box p {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-dim);
            max-width: 280px;
            line-height: 1.7;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-light);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-dim);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: rgba(255, 107, 0, 0.12);
            color: var(--primary-light);
            transform: translateY(-2px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-fade-up-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-fade-up-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-fade-up-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-fade-up-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Utilities ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .text-primary {
            color: var(--primary-light);
        }
        .bg-glass {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(8px);
        }
        .border-glow {
            border-color: rgba(255, 107, 0, 0.15);
        }
        .shadow-glow {
            box-shadow: var(--shadow-glow);
        }

        .tag {
            display: inline-block;
            background: rgba(255, 107, 0, 0.08);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 14px;
            font-size: 12px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag:hover {
            background: rgba(255, 107, 0, 0.15);
        }
        .tag.gold {
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent);
        }
        .tag.gold:hover {
            background: rgba(255, 215, 0, 0.15);
        }
        .tag.blue {
            background: rgba(66, 133, 244, 0.08);
            color: #4285F4;
        }
        .tag.blue:hover {
            background: rgba(66, 133, 244, 0.15);
        }

/* roulang page: article */
:root {
  --brand-50: #fff7ed;
  --brand-100: #ffedd5;
  --brand-200: #fed7aa;
  --brand-300: #fdba74;
  --brand-400: #fb923c;
  --brand-500: #f97316;
  --brand-600: #ea580c;
  --brand-700: #c2410c;
  --brand-800: #9a3412;
  --brand-900: #7c2d12;
  --dark-50: #f8fafc;
  --dark-100: #f1f5f9;
  --dark-200: #e2e8f0;
  --dark-300: #cbd5e1;
  --dark-400: #94a3b8;
  --dark-500: #64748b;
  --dark-600: #475569;
  --dark-700: #334155;
  --dark-800: #1e293b;
  --dark-900: #0f172a;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-hover: 0 12px 40px rgba(249,115,22,0.12), 0 4px 12px rgba(0,0,0,0.08);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;background:#fff;color:var(--dark-800);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,0,0,0.05);transition:var(--transition)}
.header-main{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.35rem;color:var(--dark-900)}
.logo-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;font-size:1.2rem;font-weight:800;box-shadow:0 4px 12px rgba(249,115,22,0.3)}
.logo span:last-child{background:linear-gradient(135deg,var(--dark-800),var(--brand-600));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.mobile-toggle{display:none;background:none;border:none;font-size:1.5rem;color:var(--dark-700);cursor:pointer;padding:8px;border-radius:8px;transition:var(--transition)}
.mobile-toggle:hover{background:var(--dark-100)}
.header-channel{background:var(--dark-800);border-bottom:2px solid var(--brand-500)}
.channel-nav{display:flex;align-items:center;gap:0;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channel-nav::-webkit-scrollbar{display:none}
.channel-item{display:flex;align-items:center;padding:0 24px;height:44px;font-size:0.95rem;font-weight:500;color:var(--dark-200);white-space:nowrap;position:relative;transition:var(--transition);border-bottom:3px solid transparent}
.channel-item:hover{color:#fff;background:rgba(255,255,255,0.06)}
.channel-item.active,.channel-item.active:hover{color:#fff;background:rgba(249,115,22,0.15);border-bottom-color:var(--brand-500);font-weight:600}
@media(max-width:768px){
  .header-main{height:56px}
  .logo{font-size:1.15rem}
  .logo-icon{width:32px;height:32px;font-size:1rem}
  .mobile-toggle{display:block}
  .channel-item{padding:0 16px;font-size:0.88rem;height:40px}
}
.article-hero{padding:48px 0 32px;background:linear-gradient(135deg,var(--dark-900),var(--dark-800));color:#fff;position:relative;overflow:hidden}
.article-hero::before{content:'';position:absolute;top:-60%;right:-20%;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(249,115,22,0.12) 0%,transparent 70%)}
.article-hero::after{content:'';position:absolute;bottom:-40%;left:-10%;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(234,88,12,0.08) 0%,transparent 70%)}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.85rem;color:var(--dark-400);margin-bottom:24px;flex-wrap:wrap}
.breadcrumb a{color:var(--dark-400);transition:var(--transition)}
.breadcrumb a:hover{color:var(--brand-400)}
.breadcrumb .sep{color:var(--dark-500)}
.article-hero h1{font-size:2.2rem;font-weight:800;line-height:1.3;margin-bottom:20px;letter-spacing:-0.02em;color:#fff}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;font-size:0.9rem;color:var(--dark-300)}
.article-meta .tag{display:inline-flex;align-items:center;gap:6px;padding:4px 14px;border-radius:20px;font-size:0.8rem;font-weight:500;background:rgba(249,115,22,0.2);color:var(--brand-300);border:1px solid rgba(249,115,22,0.2)}
.article-meta .date{display:flex;align-items:center;gap:6px}
.article-meta .date i{color:var(--brand-400)}
@media(max-width:768px){
  .article-hero{padding:32px 0 24px}
  .article-hero h1{font-size:1.5rem;margin-bottom:16px}
  .article-meta{gap:12px 16px;font-size:0.82rem}
}
.article-body{padding:48px 0 40px;background:#fafaf9}
.article-body .container{max-width:820px}
.article-content{background:#fff;border-radius:var(--radius);padding:40px 48px;box-shadow:var(--shadow-card);line-height:1.9;font-size:1.05rem;color:var(--dark-800)}
.article-content h2{font-size:1.6rem;font-weight:700;margin:36px 0 16px;color:var(--dark-900);padding-bottom:8px;border-bottom:2px solid var(--brand-100)}
.article-content h3{font-size:1.25rem;font-weight:600;margin:28px 0 12px;color:var(--dark-800)}
.article-content p{margin:0 0 18px}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:24px}
.article-content li{margin-bottom:8px}
.article-content a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-content a:hover{color:var(--brand-700)}
.article-content blockquote{margin:24px 0;padding:20px 24px;background:var(--brand-50);border-left:4px solid var(--brand-500);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:normal;color:var(--dark-700)}
.article-content img{border-radius:var(--radius-sm);margin:24px 0;box-shadow:0 4px 16px rgba(0,0,0,0.06)}
.article-content code{background:var(--dark-100);padding:2px 8px;border-radius:4px;font-size:0.92em;color:var(--dark-800)}
.article-content pre{background:var(--dark-900);color:#e2e8f0;padding:20px 24px;border-radius:var(--radius-sm);overflow-x:auto;font-size:0.92rem;margin:24px 0}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0}
.article-content th,.article-content td{padding:12px 16px;border:1px solid var(--dark-200);text-align:left}
.article-content th{background:var(--dark-100);font-weight:600}
.article-not-found{text-align:center;padding:60px 20px}
.article-not-found .icon{font-size:4rem;color:var(--dark-300);margin-bottom:20px}
.article-not-found h2{font-size:1.8rem;font-weight:700;color:var(--dark-700);margin-bottom:12px}
.article-not-found p{color:var(--dark-500);margin-bottom:24px}
.article-not-found .btn-back{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:30px;background:var(--brand-500);color:#fff;font-weight:600;transition:var(--transition)}
.article-not-found .btn-back:hover{background:var(--brand-600);transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,115,22,0.3)}
@media(max-width:768px){
  .article-body{padding:32px 0}
  .article-content{padding:24px 20px;font-size:0.98rem}
  .article-content h2{font-size:1.35rem}
}
.article-footer-bar{padding:24px 0 40px;background:#fafaf9}
.article-footer-bar .container{max-width:820px}
.tag-list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--dark-200)}
.tag-list .label{font-size:0.9rem;font-weight:600;color:var(--dark-600);margin-right:4px}
.tag-list .tag-item{display:inline-flex;align-items:center;gap:4px;padding:4px 16px;border-radius:20px;font-size:0.82rem;font-weight:500;background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-200);transition:var(--transition)}
.tag-list .tag-item:hover{background:var(--brand-100);border-color:var(--brand-400);transform:translateY(-1px)}
.share-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-bar .label{font-size:0.9rem;font-weight:600;color:var(--dark-600)}
.share-bar .share-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--dark-100);color:var(--dark-600);font-size:1.1rem;transition:var(--transition);border:none;cursor:pointer}
.share-bar .share-btn:hover{background:var(--brand-500);color:#fff;transform:translateY(-2px);box-shadow:0 4px 12px rgba(249,115,22,0.25)}
.related-section{padding:56px 0;background:#fff}
.related-section h2{font-size:1.6rem;font-weight:700;text-align:center;margin-bottom:8px;color:var(--dark-900)}
.related-section .subtitle{text-align:center;color:var(--dark-400);margin-bottom:36px;font-size:0.95rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--dark-200);box-shadow:var(--shadow-card);transition:var(--transition);display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--brand-200)}
.related-card .card-img{height:180px;background:linear-gradient(135deg,var(--dark-200),var(--dark-300));display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:var(--dark-400);position:relative;overflow:hidden}
.related-card .card-img .overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,0.4) 0%,transparent 60%)}
.related-card .card-body{padding:20px;flex:1;display:flex;flex-direction:column}
.related-card .card-cat{display:inline-block;font-size:0.75rem;font-weight:600;color:var(--brand-600);background:var(--brand-50);padding:2px 12px;border-radius:12px;margin-bottom:8px;align-self:flex-start;border:1px solid var(--brand-200)}
.related-card .card-title{font-size:1rem;font-weight:600;line-height:1.4;color:var(--dark-800);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card:hover .card-title{color:var(--brand-600)}
.related-card .card-excerpt{font-size:0.88rem;color:var(--dark-500);line-height:1.5;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:12px;font-size:0.8rem;color:var(--dark-400);border-top:1px solid var(--dark-100);padding-top:12px}
.related-card .card-meta .date{display:flex;align-items:center;gap:4px}
.related-empty{grid-column:1/-1;text-align:center;padding:40px;color:var(--dark-400);font-size:0.95rem}
@media(max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .related-grid{grid-template-columns:1fr;gap:16px}
  .related-section{padding:40px 0}
  .related-section h2{font-size:1.3rem}
}
.cta-section{padding:64px 0;background:linear-gradient(135deg,var(--dark-900),var(--dark-800));color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:-50%;left:-20%;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(249,115,22,0.1) 0%,transparent 70%)}
.cta-section::after{content:'';position:absolute;bottom:-30%;right:-10%;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(234,88,12,0.06) 0%,transparent 70%)}
.cta-section .container{position:relative;z-index:1}
.cta-section h2{font-size:1.8rem;font-weight:700;margin-bottom:12px}
.cta-section p{font-size:1.05rem;color:var(--dark-300);max-width:600px;margin:0 auto 28px}
.cta-btns{display:flex;flex-wrap:wrap;justify-content:center;gap:16px}
.cta-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:30px;font-weight:600;font-size:1rem;transition:var(--transition);border:none;cursor:pointer}
.cta-btn.primary{background:var(--brand-500);color:#fff;box-shadow:0 4px 16px rgba(249,115,22,0.3)}
.cta-btn.primary:hover{background:var(--brand-600);transform:translateY(-2px);box-shadow:0 8px 28px rgba(249,115,22,0.4)}
.cta-btn.outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.2)}
.cta-btn.outline:hover{background:rgba(255,255,255,0.08);border-color:var(--brand-400);transform:translateY(-2px)}
@media(max-width:640px){
  .cta-section{padding:48px 0}
  .cta-section h2{font-size:1.4rem}
  .cta-btn{padding:12px 24px;font-size:0.92rem}
}
.faq-section{padding:56px 0;background:#fafaf9}
.faq-section h2{font-size:1.6rem;font-weight:700;text-align:center;margin-bottom:8px;color:var(--dark-900)}
.faq-section .subtitle{text-align:center;color:var(--dark-400);margin-bottom:36px;font-size:0.95rem}
.faq-grid{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-card);overflow:hidden;transition:var(--transition);border:1px solid var(--dark-200)}
.faq-item:hover{border-color:var(--brand-200);box-shadow:var(--shadow-hover)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--dark-800);transition:var(--transition);gap:12px;background:none;border:none;width:100%;text-align:left}
.faq-question:hover{color:var(--brand-600)}
.faq-question .icon{flex-shrink:0;color:var(--brand-500);font-size:1.1rem;transition:var(--transition)}
.faq-item.active .faq-question .icon{transform:rotate(180deg)}
.faq-question .q-text{flex:1}
.faq-answer{padding:0 24px 18px;font-size:0.94rem;color:var(--dark-600);line-height:1.7;display:none}
.faq-item.active .faq-answer{display:block}
.faq-item.active{border-color:var(--brand-200)}
@media(max-width:640px){
  .faq-section{padding:40px 0}
  .faq-section h2{font-size:1.3rem}
  .faq-question{padding:14px 16px;font-size:0.92rem}
  .faq-answer{padding:0 16px 14px;font-size:0.88rem}
}
.site-footer{background:var(--dark-900);color:var(--dark-300);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,0.06)}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo span:last-child{-webkit-text-fill-color:#fff;background:none;color:#fff}
.footer-brand p{font-size:0.9rem;line-height:1.6;color:var(--dark-400);max-width:320px}
.footer-col h5{font-size:0.95rem;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{list-style:none;padding:0}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:0.88rem;color:var(--dark-400);transition:var(--transition);display:flex;align-items:center;gap:8px}
.footer-col ul li a:hover{color:var(--brand-400);padding-left:4px}
.footer-col ul li a i{font-size:1rem;width:18px;text-align:center;color:var(--brand-500)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding:20px 0;flex-wrap:wrap;gap:12px}
.footer-bottom span{font-size:0.85rem;color:var(--dark-500)}
.footer-social{display:flex;gap:12px}
.footer-social a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.06);color:var(--dark-400);font-size:1rem;transition:var(--transition)}
.footer-social a:hover{background:var(--brand-500);color:#fff;transform:translateY(-2px)}
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .site-footer{padding:32px 0 0}
  .footer-bottom{flex-direction:column;text-align:center}
}
/* scroll to top */
.scroll-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;border-radius:50%;background:var(--brand-500);color:#fff;border:none;font-size:1.2rem;cursor:pointer;box-shadow:0 4px 16px rgba(249,115,22,0.3);transition:var(--transition);opacity:0;visibility:hidden;transform:translateY(20px);z-index:99}
.scroll-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top:hover{background:var(--brand-600);transform:translateY(-3px);box-shadow:0 8px 24px rgba(249,115,22,0.4)}
/* skeleton loading */
.skeleton{background:linear-gradient(90deg,var(--dark-100) 25%,var(--dark-200) 50%,var(--dark-100) 75%);background-size:200% 100%;animation:skeleton 1.5s infinite;border-radius:4px}
@keyframes skeleton{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* roulang page: category1 */
:root {
            --primary: #1a3a84;
            --primary-light: #3d5794;
            --primary-dark: #08183a;
            --accent: #f9a825;
            --accent-light: #fbc25e;
            --accent-dark: #e6951f;
            --bg-body: #f5f7fb;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0d2250;
            --text-primary: #1a1a2e;
            --text-body: #3d3d5c;
            --text-weak: #7a7a9e;
            --text-white: #ffffff;
            --border-light: #e8ecf4;
            --border-card: #edf0f7;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.10);
            --shadow-glow: 0 0 30px rgba(249, 168, 37, 0.20);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --spacing-section: 80px;
            --max-width: 1200px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 16px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

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

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --spacing-section: 48px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 36px;
            }
        }

        /* ===== HEADER & NAV ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.03);
        }

        .header-brand {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 22px;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(249, 168, 37, 0.35);
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 30px;
            padding: 4px 16px 4px 20px;
            border: 1px solid var(--border-light);
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(249, 168, 37, 0.12);
        }
        .header-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-primary);
            min-width: 180px;
            outline: none;
        }
        .header-search input::placeholder {
            color: var(--text-weak);
        }
        .header-search button {
            background: none;
            border: none;
            color: var(--text-weak);
            cursor: pointer;
            padding: 6px 8px;
            font-size: 15px;
            transition: color 0.2s;
        }
        .header-search button:hover {
            color: var(--accent);
        }

        .header-channel {
            display: flex;
            align-items: center;
            gap: 2px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px 10px 24px;
            width: 100%;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-wrap: nowrap;
        }
        .header-channel::-webkit-scrollbar {
            display: none;
        }

        .channel-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 30px;
            white-space: nowrap;
            transition: background 0.25s, color 0.25s, transform 0.2s;
            cursor: pointer;
        }
        .channel-item:hover {
            background: rgba(249, 168, 37, 0.10);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .channel-item.active {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(249, 168, 37, 0.30);
        }
        .channel-item.active:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(249, 168, 37, 0.40);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .mobile-toggle:hover {
            background: var(--bg-body);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0 24px 16px 24px;
            gap: 4px;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
        }
        .mobile-menu .channel-item {
            width: 100%;
            justify-content: center;
            padding: 12px 20px;
        }

        @media (max-width: 768px) {
            .header-brand {
                padding: 10px 16px;
            }
            .header-search input {
                min-width: 120px;
            }
            .header-channel {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 18px;
                gap: 8px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .header-search input {
                min-width: 80px;
                font-size: 13px;
            }
        }

        /* ===== HERO ===== */
        .hero-category {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(249, 168, 37, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -8%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(76, 175, 80, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
        }
        .hero-category h1 {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .hero-category h1 span {
            background: linear-gradient(135deg, var(--accent-light), #ffd54f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .hero-tags .tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.90);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.25s, transform 0.2s;
        }
        .hero-tags .tag:hover {
            background: rgba(255, 255, 255, 0.22);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 44px 0 40px;
            }
            .hero-category h1 {
                font-size: 30px;
            }
            .hero-category p {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 26px;
            }
            .hero-category p {
                font-size: 15px;
            }
        }

        /* ===== SECTION ===== */
        .section-block {
            padding: var(--spacing-section) 0;
        }
        .section-block.bg-white {
            background: var(--bg-white);
        }
        .section-block.bg-light {
            background: var(--bg-body);
        }
        .section-block.bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title.light {
            color: #fff;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 600px;
            line-height: 1.6;
            margin-bottom: 36px;
        }
        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.70);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle {
            margin: 0 auto 36px;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== CARDS ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: #eef1f8;
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 10px;
        }
        .card-badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(249, 168, 37, 0.12);
            color: var(--accent-dark);
        }
        .card-badge.green {
            background: rgba(76, 175, 80, 0.12);
            color: #2e7d32;
        }
        .card-badge.blue {
            background: rgba(26, 58, 132, 0.10);
            color: var(--primary);
        }
        .card-badge.purple {
            background: rgba(156, 39, 176, 0.10);
            color: #7b1fa2;
        }

        /* ===== GRID ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .grid-3,
            .grid-2 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .grid-3,
            .grid-2,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* ===== FEATURE ICON CARDS ===== */
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            font-size: 28px;
            margin-bottom: 18px;
            color: #fff;
        }
        .feature-icon.orange {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            box-shadow: 0 6px 20px rgba(249, 168, 37, 0.30);
        }
        .feature-icon.blue {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 6px 20px rgba(26, 58, 132, 0.25);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #4caf50, #2e7d32);
            box-shadow: 0 6px 20px rgba(76, 175, 80, 0.25);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== TIMELINE ===== */
        .timeline {
            position: relative;
            padding-left: 36px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 8px;
            bottom: 8px;
            width: 3px;
            background: linear-gradient(to bottom, var(--accent), var(--primary-light));
            border-radius: 6px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 28px 24px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 4px rgba(249, 168, 37, 0.25);
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item .time {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-dark);
            margin-bottom: 4px;
        }
        .timeline-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        @media (max-width: 520px) {
            .timeline {
                padding-left: 24px;
            }
            .timeline-item {
                padding: 0 0 20px 16px;
            }
            .timeline-item::before {
                left: -22px;
                width: 12px;
                height: 12px;
            }
        }

        /* ===== FILTER TABS ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 32px;
        }
        .filter-tab {
            padding: 8px 22px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            color: var(--text-body);
            cursor: pointer;
            transition: all 0.25s;
        }
        .filter-tab:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: rgba(249, 168, 37, 0.05);
        }
        .filter-tab.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(249, 168, 37, 0.30);
        }

        /* ===== STATS ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.3s, transform 0.3s;
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 28px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.25s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(249, 168, 37, 0.04);
        }
        .faq-question .icon {
            font-size: 18px;
            color: var(--accent);
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px 24px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(249, 168, 37, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .cta-block p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 6px 20px rgba(249, 168, 37, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(249, 168, 37, 0.45);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            color: #fff;
            transform: translateY(-3px);
        }
        .btn-secondary {
            background: var(--bg-white);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            color: var(--primary-dark);
        }

        @media (max-width: 768px) {
            .cta-block h2 {
                font-size: 26px;
            }
            .cta-block p {
                font-size: 15px;
            }
            .btn {
                padding: 12px 26px;
                font-size: 14px;
            }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
            font-size: 20px;
        }
        .footer-brand .logo .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 18px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 280px;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 14px;
            transition: color 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
        }
        .footer-col ul li a i {
            font-size: 16px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.60);
            font-size: 16px;
            transition: background 0.25s, color 0.25s, transform 0.2s;
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== MISC ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-primary {
            color: var(--primary);
        }
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .gap-section {
            height: 2px;
            background: var(--border-light);
            margin: 0;
        }

        .empty-state {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-weak);
        }
        .empty-state i {
            font-size: 48px;
            color: var(--border-light);
            margin-bottom: 16px;
        }

        /* ===== ANIMATIONS ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }