/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0F172A;
            --primary-light: #1E293B;
            --primary-lighter: #334155;
            --secondary: #3B82F6;
            --secondary-hover: #2563EB;
            --secondary-light: #EFF6FF;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --accent-light: #FEF3C7;
            --bg: #FFFFFF;
            --bg-alt: #F1F5F9;
            --bg-dark: #0F172A;
            --text: #0F172A;
            --text-light: #475569;
            --text-lighter: #94A3B8;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.12);
            --shadow-hover: 0 20px 56px rgba(15, 23, 42, 0.16);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
        h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 900px;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .section-dark .section-subtitle {
            color: var(--text-lighter);
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(15, 23, 42, 0.96);
            box-shadow: 0 2px 32px rgba(0,0,0,0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .header-logo i {
            color: var(--secondary);
            font-size: 1.5rem;
        }
        .header-logo span {
            background: linear-gradient(135deg, #60A5FA, #A78BFA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(255,255,255,0.08);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(59,130,246,0.2);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--secondary);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-cta .btn-search {
            color: rgba(255,255,255,0.7);
            font-size: 1.15rem;
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            transition: var(--transition);
        }
        .header-cta .btn-search:hover {
            color: var(--text-white);
            background: rgba(255,255,255,0.08);
        }
        .header-cta .btn-download {
            background: var(--secondary);
            color: var(--text-white);
            padding: 10px 24px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-cta .btn-download:hover {
            background: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59,130,246,0.35);
        }
        .nav-toggle {
            display: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 8px;
            border-radius: var(--radius-xs);
            background: rgba(255,255,255,0.1);
            cursor: pointer;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark);
            overflow: hidden;
            padding-top: var(--header-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% { transform: scale(1.05); }
            100% { transform: scale(1.15); }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 40%, rgba(15,23,42,0.6) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(59,130,246,0.2);
            border: 1px solid rgba(59,130,246,0.3);
            border-radius: 999px;
            padding: 6px 18px;
            color: #93C5FD;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
            color: var(--accent);
        }
        .hero-title {
            color: var(--text-white);
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title span {
            background: linear-gradient(135deg, #60A5FA, #A78BFA, #F472B6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            color: rgba(255,255,255,0.75);
            font-size: 1.2rem;
            font-weight: 400;
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: var(--text-white);
            padding: 16px 36px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 8px 32px rgba(59,130,246,0.35);
        }
        .hero-actions .btn-primary:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(59,130,246,0.5);
        }
        .hero-actions .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255,255,255,0.1);
            color: var(--text-white);
            padding: 16px 36px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 1px solid rgba(255,255,255,0.2);
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255,255,255,0.18);
            transform: translateY(-3px);
            border-color: rgba(255,255,255,0.3);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .hero-stat-number i {
            color: var(--accent);
            font-size: 1.4rem;
            margin-right: 4px;
        }
        .hero-stat-label {
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
            font-weight: 400;
            margin-top: 4px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--secondary);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
            transition: var(--transition);
        }
        .feature-card:nth-child(1) .feature-icon {
            background: var(--secondary-light);
            color: var(--secondary);
        }
        .feature-card:nth-child(2) .feature-icon {
            background: var(--accent-light);
            color: var(--accent);
        }
        .feature-card:nth-child(3) .feature-icon {
            background: #F3E8FF;
            color: #9333EA;
        }
        .feature-card:nth-child(4) .feature-icon {
            background: #DCFCE7;
            color: #16A34A;
        }
        .feature-card h3 {
            margin-bottom: 12px;
            font-size: 1.15rem;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Game Categories ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
            gap: 20px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            aspect-ratio: 3 / 4;
            display: flex;
            align-items: flex-end;
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid var(--border);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover img {
            transform: scale(1.08);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15,23,42,0.85) 20%, rgba(15,23,42,0.1) 70%);
            transition: var(--transition);
        }
        .category-card:hover .overlay {
            background: linear-gradient(0deg, rgba(15,23,42,0.9) 20%, rgba(15,23,42,0.2) 70%);
        }
        .category-card-info {
            position: relative;
            z-index: 2;
            padding: 20px;
            width: 100%;
        }
        .category-card-info h3 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .category-card-info .tag {
            display: inline-block;
            background: rgba(59,130,246,0.3);
            backdrop-filter: blur(4px);
            color: #93C5FD;
            font-size: 0.7rem;
            padding: 2px 12px;
            border-radius: 999px;
            font-weight: 500;
        }
        .category-card-info .rating {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-top: 8px;
            color: var(--accent);
            font-size: 0.8rem;
        }
        .category-card-info .rating span {
            color: rgba(255,255,255,0.6);
            font-size: 0.8rem;
            margin-left: 4px;
        }

        /* ===== CMS News ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .news-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .news-card-img img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-img .news-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(59,130,246,0.9);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            font-size: 0.7rem;
            padding: 4px 14px;
            border-radius: 999px;
            font-weight: 600;
        }
        .news-card-body {
            padding: 20px;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-lighter);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .news-card-meta i {
            margin-right: 4px;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            background: var(--bg-alt);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--text-lighter);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-card {
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius);
            padding: 36px 24px;
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255,255,255,0.08);
            transform: translateY(-4px);
            border-color: rgba(59,130,246,0.3);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .stat-number i {
            color: var(--accent);
            font-size: 1.6rem;
            margin-right: 6px;
        }
        .stat-label {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            font-weight: 400;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--text-white);
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(59,130,246,0.3);
        }
        .step-icon {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-card h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--secondary);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--secondary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-lighter);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 240px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
            border-radius: var(--radius);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section h2 {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--text);
            padding: 16px 40px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 8px 32px rgba(245,158,11,0.35);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(245,158,11,0.5);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand h3 {
            color: var(--text-white);
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-brand h3 i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            max-width: 320px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer ul li a:hover {
            color: var(--secondary);
            transform: translateX(4px);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--text-white);
            transform: translateY(-3px);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Buttons / Tags / Badges ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--text-white);
        }
        .btn-primary:hover {
            background: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59,130,246,0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--secondary);
            border: 2px solid var(--secondary);
        }
        .btn-outline:hover {
            background: var(--secondary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--secondary-light);
            color: var(--secondary);
        }
        .tag-accent {
            background: var(--accent-light);
            color: var(--accent);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 600;
            background: rgba(59,130,246,0.15);
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section {
                padding: 60px 0;
            }
            .hero-title {
                font-size: clamp(2rem, 5vw, 3rem);
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15,23,42,0.98);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                backdrop-filter: blur(16px);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-xs);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .header-cta .btn-download span {
                display: none;
            }
            .header-cta .btn-download {
                padding: 10px 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: 48px 0;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .header-logo {
                font-size: 1.1rem;
            }
            .cta-section {
                padding: 32px 16px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-lighter);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--secondary);
            color: var(--text-white);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-light: #a29bfe;
            --primary-dark: #4834d4;
            --secondary: #fd79a8;
            --secondary-light: #fab1c8;
            --accent: #fdcb6e;
            --bg-main: #0f0e17;
            --bg-card: #1a1932;
            --bg-card-hover: #222145;
            --bg-section-alt: #15132b;
            --text-primary: #f5f3ff;
            --text-secondary: #c0bcdd;
            --text-muted: #7c78a0;
            --border-color: rgba(108, 92, 231, 0.2);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 20px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 40px rgba(108,92,231,0.15);
            --shadow-lg: 0 16px 60px rgba(108,92,231,0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::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: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: #fff; }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: #fff; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 14, 23, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(15, 14, 23, 0.96);
            box-shadow: 0 4px 30px rgba(0,0,0,0.5);
        }
        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .header-logo i {
            font-size: 26px;
            color: var(--primary-light);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .header-logo span { background: linear-gradient(135deg, #fff 60%, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .header-logo:hover { opacity: 0.9; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a:hover { color: #fff; background: rgba(108,92,231,0.15); }
        .nav-list a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 20px rgba(108,92,231,0.3);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn-search {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 18px;
            transition: var(--transition);
            background: rgba(255,255,255,0.05);
        }
        .btn-search:hover { background: rgba(108,92,231,0.2); color: #fff; }
        .btn-download {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108,92,231,0.3);
        }
        .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108,92,231,0.4);
            color: #fff;
        }
        .btn-download i { font-size: 16px; }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-size: 22px;
            background: rgba(255,255,255,0.05);
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(108,92,231,0.2); }

        @media (max-width: 900px) {
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(15,14,23,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 60px rgba(0,0,0,0.6);
                z-index: 999;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; }
            .nav-list a {
                width: 100%;
                text-align: center;
                padding: 14px 18px;
                font-size: 16px;
            }
            .nav-toggle { display: flex; }
            .btn-download span { display: none; }
            .btn-download { padding: 10px 16px; }
        }
        @media (max-width: 480px) {
            .header-inner { padding: 0 12px; gap: 10px; }
            .header-logo { font-size: 18px; }
            .header-logo i { font-size: 20px; }
        }

        /* ===== Article Hero / Banner ===== */
        .article-hero {
            padding-top: calc(var(--nav-height) + 60px);
            padding-bottom: 60px;
            background: linear-gradient(160deg, #0f0e17 0%, #1a1932 50%, #15132b 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary-light); }
        .article-breadcrumb .sep { color: var(--text-muted); opacity: 0.4; }
        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            background: linear-gradient(135deg, rgba(108,92,231,0.2), rgba(253,121,168,0.15));
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(108,92,231,0.2);
            width: fit-content;
        }
        .article-category-badge i { font-size: 12px; }
        .article-hero h1 {
            font-size: clamp(28px, 4.5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            max-width: 900px;
            background: linear-gradient(135deg, #fff 60%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 8px;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 14px; color: var(--primary-light); }
        .article-meta .divider { width: 1px; height: 18px; background: var(--border-color); }

        @media (max-width: 768px) {
            .article-hero { padding-top: calc(var(--nav-height) + 30px); padding-bottom: 40px; }
            .article-hero h1 { font-size: clamp(22px, 6vw, 32px); }
            .article-meta { gap: 12px; font-size: 13px; }
            .article-meta .divider { display: none; }
        }

        /* ===== Article Main Content ===== */
        .article-main {
            padding: 50px 0 80px;
            background: var(--bg-main);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 40px;
            overflow: hidden;
        }
        .article-content .cover-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
        }
        .article-content .cover-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-content .cover-image:hover img { transform: scale(1.02); }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-body h2, .article-body h3, .article-body h4 {
            color: #fff;
            margin-top: 36px;
            margin-bottom: 16px;
        }
        .article-body h2 { font-size: 24px; }
        .article-body h3 { font-size: 20px; }
        .article-body p { margin-bottom: 18px; }
        .article-body ul, .article-body ol {
            margin: 0 0 18px 24px;
        }
        .article-body li { margin-bottom: 8px; list-style: disc; }
        .article-body a { color: var(--primary-light); text-decoration: underline; }
        .article-body a:hover { color: #fff; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(108,92,231,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .highlight-box {
            background: rgba(108,92,231,0.08);
            border: 1px solid rgba(108,92,231,0.15);
            border-radius: var(--radius-sm);
            padding: 24px 28px;
            margin: 24px 0;
        }
        .article-body .highlight-box h4 { margin-top: 0; }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(108,92,231,0.1);
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(108,92,231,0.15);
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: rgba(108,92,231,0.2); color: #fff; }
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
            max-width: 48%;
        }
        .article-nav a:hover { background: rgba(108,92,231,0.1); color: #fff; border-color: rgba(108,92,231,0.2); }
        .article-nav .next { text-align: right; flex-direction: row-reverse; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 28px;
            transition: var(--transition);
        }
        .sidebar-card:hover { border-color: rgba(108,92,231,0.2); }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i { color: var(--primary-light); font-size: 18px; }
        .sidebar-list { display: flex; flex-direction: column; gap: 14px; }
        .sidebar-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list-item:last-child { border-bottom: none; padding-bottom: 0; }
        .sidebar-list-item .thumb {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-main);
        }
        .sidebar-list-item .thumb img { width: 100%; height: 100%; object-fit: cover; }
        .sidebar-list-item .info { flex: 1; min-width: 0; }
        .sidebar-list-item .info .title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
            transition: var(--transition);
        }
        .sidebar-list-item .info .title:hover { color: var(--primary-light); }
        .sidebar-list-item .info .date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .sidebar-cta {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-cta .btn-block {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }
        .sidebar-cta .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(108,92,231,0.3);
        }
        .sidebar-cta .btn-primary-custom:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(108,92,231,0.4); color: #fff; }
        .sidebar-cta .btn-outline {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        .sidebar-cta .btn-outline:hover { border-color: var(--primary); color: #fff; background: rgba(108,92,231,0.1); }

        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; gap: 40px; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 640px) {
            .article-content { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .article-nav { flex-direction: column; }
            .article-nav a { max-width: 100%; }
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section-alt);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
            text-align: center;
        }
        .related-section .section-sub {
            color: var(--text-muted);
            text-align: center;
            margin-bottom: 40px;
            font-size: 16px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); border-color: rgba(108,92,231,0.2); box-shadow: var(--shadow-md); }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-main);
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-body .cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
            display: block;
        }
        .related-card .card-body h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
        .related-card .card-body h4 a { color: #fff; }
        .related-card .card-body h4 a:hover { color: var(--primary-light); }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .related-card .card-body .meta i { font-size: 12px; color: var(--primary-light); }

        @media (max-width: 900px) {
            .related-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section .section-title { font-size: 22px; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-box h2 { font-size: 28px; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(108,92,231,0.4); color: #fff; }

        /* ===== Footer ===== */
        .footer {
            background: #0a0915;
            border-top: 1px solid var(--border-light);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-light);
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand h3 i { color: var(--primary-light); font-size: 24px; }
        .footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 380px; }
        .footer-social { display: flex; gap: 12px; margin-top: 20px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.05);
            color: var(--text-muted);
            font-size: 18px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }
        .footer h4 { font-size: 16px; font-weight: 700; margin-bottom: 18px; color: #fff; }
        .footer ul { display: flex; flex-direction: column; gap: 10px; }
        .footer ul li a { color: var(--text-muted); font-size: 14px; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
        .footer ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-bottom span { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

        @media (max-width: 900px) {
            .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: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-main); }
        ::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--primary); }

        /* ===== Selection ===== */
        ::selection { background: rgba(108,92,231,0.4); color: #fff; }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-up { animation: fadeUp 0.6s ease forwards; }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
        }

/* roulang page: category1 */
/* ===== CSS Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --primary-bg: #F8F7FF;
            --secondary: #FD79A8;
            --secondary-dark: #E86A8F;
            --accent: #00CEC9;
            --accent-dark: #00B5B0;
            --bg: #FFFFFF;
            --bg-alt: #F9F9FB;
            --bg-card: #FFFFFF;
            --text: #2D3436;
            --text-secondary: #636E72;
            --text-light: #B2BEC3;
            --border: #E8E8ED;
            --border-light: #F0F0F5;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { font: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
        h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
        h3 { font-size: 1.25rem; }
        h4 { font-size: 1.1rem; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            flex-shrink: 0;
        }
        .header-logo i { font-size: 1.5rem; color: var(--secondary); }
        .header-logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 0.95rem;
            position: relative;
        }
        .nav-list a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-list a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn-search {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .btn-search:hover { background: var(--primary-bg); color: var(--primary); }
        .btn-download {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(108,92,231,0.3);
        }
        .btn-download:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(108,92,231,0.4); }
        .btn-download i { font-size: 1rem; }
        .nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; font-size: 1.4rem; color: var(--text); border-radius: var(--radius-sm); transition: var(--transition); }
        .nav-toggle:hover { background: var(--primary-bg); color: var(--primary); }

        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-md);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-list a.active::after { display: none; }
            .nav-list a.active { background: var(--primary-bg); }
            .nav-toggle { display: flex; }
            .btn-download span { display: none; }
            .btn-download { padding: 10px 14px; }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: var(--header-height);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-bg) 0%, #E8F8F5 100%);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }
        .page-banner-text { flex: 1; min-width: 280px; }
        .page-banner-text h1 { margin-bottom: 16px; color: var(--text); }
        .page-banner-text h1 span { color: var(--primary); }
        .page-banner-text p { color: var(--text-secondary); font-size: 1.05rem; max-width: 560px; line-height: 1.7; }
        .page-banner-stats {
            display: flex;
            gap: 32px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .page-banner-stats .stat-item { text-align: center; }
        .page-banner-stats .stat-item .num { font-size: 1.8rem; font-weight: 800; color: var(--primary); display: block; }
        .page-banner-stats .stat-item .label { font-size: 0.85rem; color: var(--text-light); }
        .page-banner-image { flex: 0 0 300px; height: 200px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); background: var(--bg); }
        .page-banner-image img { width: 100%; height: 100%; object-fit: cover; }
        @media (max-width: 768px) {
            .page-banner { padding: 60px 0 40px; }
            .page-banner-image { flex: 0 0 100%; height: 180px; }
            .page-banner-stats { gap: 20px; }
            .page-banner-stats .stat-item .num { font-size: 1.4rem; }
        }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { margin-bottom: 12px; }
        .section-title h2 span { color: var(--primary); }
        .section-title p { color: var(--text-secondary); font-size: 1rem; max-width: 600px; margin: 0 auto; }
        .section-subtitle { display: inline-block; font-size: 0.85rem; font-weight: 600; color: var(--primary); background: var(--primary-bg); padding: 6px 16px; border-radius: 20px; margin-bottom: 12px; letter-spacing: 0.5px; }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { margin-bottom: 32px; }
        }

        /* ===== Filter / Tag Bar ===== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .filter-bar .tag {
            padding: 8px 24px;
            border-radius: 20px;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-bar .tag:hover { border-color: var(--primary-light); color: var(--primary); background: var(--primary-bg); }
        .filter-bar .tag.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 4px 12px rgba(108,92,231,0.25); }

        /* ===== Game Card Grid ===== */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .game-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .game-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .game-card-img {
            width: 100%;
            height: 180px;
            background: var(--bg-alt);
            overflow: hidden;
            position: relative;
        }
        .game-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .game-card:hover .game-card-img img { transform: scale(1.05); }
        .game-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--secondary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
            letter-spacing: 0.3px;
        }
        .game-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .game-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--text); }
        .game-card-body .meta { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--text-light); margin-bottom: 12px; flex-wrap: wrap; }
        .game-card-body .meta i { color: var(--primary-light); }
        .game-card-body .desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin-bottom: 16px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .game-card-body .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
        .game-card-body .tags .tag-sm { padding: 4px 12px; border-radius: 12px; background: var(--primary-bg); color: var(--primary); font-size: 0.75rem; font-weight: 500; }
        .game-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--border-light); }
        .game-card-footer .rating { color: #F39C12; font-size: 0.85rem; }
        .game-card-footer .rating span { color: var(--text-light); margin-left: 4px; }
        .game-card-footer .btn-sm { padding: 8px 20px; border-radius: var(--radius-sm); background: var(--primary); color: #fff; font-size: 0.85rem; font-weight: 600; transition: var(--transition); }
        .game-card-footer .btn-sm:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(108,92,231,0.3); }

        /* ===== Rank List ===== */
        .rank-list { max-width: 800px; margin: 0 auto; }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .rank-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); transform: translateX(4px); }
        .rank-num { font-size: 1.5rem; font-weight: 800; color: var(--primary-light); min-width: 40px; text-align: center; }
        .rank-num.top { color: var(--secondary); }
        .rank-info { flex: 1; }
        .rank-info h4 { font-size: 1rem; margin-bottom: 4px; }
        .rank-info p { font-size: 0.85rem; color: var(--text-secondary); }
        .rank-score { text-align: right; }
        .rank-score .score { font-size: 1.2rem; font-weight: 700; color: var(--primary); display: block; }
        .rank-score .label { font-size: 0.75rem; color: var(--text-light); }
        @media (max-width: 600px) {
            .rank-item { padding: 16px; gap: 12px; flex-wrap: wrap; }
            .rank-num { min-width: 28px; font-size: 1.2rem; }
            .rank-score { width: 100%; text-align: left; margin-top: 8px; }
            .rank-score .score { display: inline; margin-right: 6px; }
        }

        /* ===== Feature / Why Section ===== */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .why-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .why-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); transform: translateY(-4px); }
        .why-card .icon { width: 64px; height: 64px; border-radius: 50%; background: var(--primary-bg); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: var(--primary); }
        .why-card h4 { margin-bottom: 10px; }
        .why-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

        /* ===== Testimonials ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .testimonial-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
        .testimonial-card .stars { color: #F39C12; font-size: 0.9rem; margin-bottom: 12px; }
        .testimonial-card blockquote { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; margin-bottom: 16px; font-style: italic; }
        .testimonial-card .author { display: flex; align-items: center; gap: 12px; }
        .testimonial-card .author .avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--primary-bg); display: flex; align-items: center; justify-content: center; color: var(--primary); font-weight: 700; font-size: 1rem; }
        .testimonial-card .author .name { font-weight: 600; font-size: 0.9rem; }
        .testimonial-card .author .role { font-size: 0.8rem; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question i { color: var(--primary-light); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; margin-bottom: 16px; font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.05rem; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-buttons .btn-primary {
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.15);
        }
        .cta-buttons .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.2); }
        .cta-buttons .btn-outline {
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.4);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .cta-buttons .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-3px); }

        /* ===== Footer ===== */
        .footer {
            background: #1E1E2E;
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 { color: #fff; font-size: 1.3rem; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
        .footer-brand h3 i { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 20px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 20px; }
        .footer ul li { margin-bottom: 10px; }
        .footer ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; transition: var(--transition); }
        .footer ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 768px) {
            .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; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .game-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
        }
        @media (max-width: 600px) {
            .game-grid { grid-template-columns: 1fr; }
            .game-card-img { height: 160px; }
            .filter-bar .tag { padding: 6px 16px; font-size: 0.8rem; }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .fade-in-up { animation: fadeInUp 0.6s ease forwards; }
        .fade-in-up-d1 { animation-delay: 0.1s; }
        .fade-in-up-d2 { animation-delay: 0.2s; }
        .fade-in-up-d3 { animation-delay: 0.3s; }