/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --primary-bg: rgba(99, 102, 241, 0.08);
            --secondary: #f97316;
            --secondary-dark: #ea580c;
            --accent: #06b6d4;
            --bg: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-nav: rgba(15, 15, 26, 0.92);
            --bg-footer: #0a0a14;
            --text: #f1f5f9;
            --text-muted: #94a3b8;
            --text-weak: #64748b;
            --border: rgba(99, 102, 241, 0.2);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --gap: 24px;
            --section-pad: 80px 0;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: var(--text);
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 4rem);
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            margin-bottom: 12px;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 40px;
            text-align: center;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            background: transparent;
            color: var(--text);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 8px 32px rgba(99, 102, 241, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary {
            background: transparent;
            border-color: var(--border);
            color: var(--text);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: var(--primary-bg);
            color: var(--primary-light);
            transform: translateY(-2px);
        }
        .btn-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            border-color: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
        }
        .btn-cta:hover {
            box-shadow: 0 8px 32px rgba(249, 115, 22, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.875rem;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary-light);
            border: 1px solid var(--border);
        }
        .badge-hot {
            background: rgba(249, 115, 22, 0.15);
            color: var(--secondary);
            border-color: rgba(249, 115, 22, 0.3);
        }
        .badge-new {
            background: rgba(6, 182, 212, 0.15);
            color: var(--accent);
            border-color: rgba(6, 182, 212, 0.3);
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary-light);
            font-size: 1.2rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-list a.active {
            color: #fff;
            background: var(--primary-bg);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0f0f1a 0%, #1a1a3e 50%, #0f0f1a 100%);
            position: relative;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 50px;
            background: var(--primary-bg);
            border: 1px solid var(--border);
            color: var(--primary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .hero h1 {
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 540px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border-light);
        }
        .hero-stat h4 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
        }
        .hero-stat p {
            color: var(--text-weak);
            font-size: 0.85rem;
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            max-height: 400px;
            width: 100%;
            object-fit: cover;
        }
        .hero-floating {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            box-shadow: var(--shadow);
            backdrop-filter: blur(10px);
        }
        .hero-floating span {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .hero-floating strong {
            color: var(--secondary);
            font-size: 1.1rem;
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-pad);
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header .badge {
            margin-bottom: 16px;
        }
        .section-dark {
            background: var(--bg-card);
        }
        .section-dark-alt {
            background: #12122a;
        }

        /* ===== Feature / Capability Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--gap);
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
            cursor: default;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            border-color: var(--border);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            background: var(--bg-card-hover);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: var(--primary-bg);
            color: var(--primary-light);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .feature-card .badge {
            margin-top: 16px;
        }

        /* ===== Category / Entry Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--gap);
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .category-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }
        .category-card-body {
            padding: 20px 24px 24px;
        }
        .category-card-body h3 {
            margin-bottom: 8px;
            font-size: 1.15rem;
        }
        .category-card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .category-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* ===== Content / Post List ===== */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .content-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .content-item:hover {
            border-color: var(--border);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .content-item .item-index {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .content-item .item-body {
            flex: 1;
            min-width: 0;
        }
        .content-item .item-body h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .content-item .item-body h4 a {
            color: var(--text);
        }
        .content-item .item-body h4 a:hover {
            color: var(--primary-light);
        }
        .content-item .item-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-item .item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 8px;
            font-size: 0.8rem;
            color: var(--text-weak);
        }
        .content-item .item-meta .cat {
            color: var(--primary-light);
        }
        .content-item .item-arrow {
            color: var(--text-weak);
            font-size: 1.2rem;
            flex-shrink: 0;
            align-self: center;
            transition: var(--transition);
        }
        .content-item:hover .item-arrow {
            color: var(--primary-light);
            transform: translateX(4px);
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--gap);
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-item .num .accent {
            color: var(--primary-light);
        }
        .stat-item .label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        /* ===== Flow / Steps ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--gap);
            position: relative;
        }
        .flow-step {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .flow-step:hover {
            border-color: var(--border);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .flow-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 16px;
            border: 1px solid var(--border);
        }
        .flow-step h4 {
            margin-bottom: 8px;
        }
        .flow-step p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .flow-arrow {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
            gap: 16px;
        }
        .faq-question i {
            color: var(--text-weak);
            transition: var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary-light);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a3e, #0f0f1a);
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section h2 {
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }
        .cta-section p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            position: relative;
            z-index: 2;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            position: relative;
            z-index: 2;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: #fff;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-weak);
        }
        .footer-bottom a {
            color: var(--text-weak);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: var(--primary-bg);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-desc {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-floating {
                left: 50%;
                transform: translateX(-50%);
                bottom: -30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-nav);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid var(--border-light);
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
            }
            .nav-toggle {
                display: block;
            }
            .nav-cta .btn {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
            .hero {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stat h4 {
                font-size: 1.4rem;
            }
            .hero-visual img {
                max-height: 260px;
            }
            .hero-floating {
                display: none;
            }
            .section {
                padding: 50px 0;
            }
            .feature-grid,
            .category-grid,
            .flow-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .content-item {
                flex-direction: column;
                gap: 12px;
                padding: 16px 18px;
            }
            .content-item .item-arrow {
                align-self: flex-end;
            }
            .cta-section {
                padding: 50px 0;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .num {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
            --secondary: #7c3aed;
            --accent: #f59e0b;
            --bg-body: #0f172a;
            --bg-card: #1e293b;
            --bg-section: #1a2236;
            --bg-elevated: #2d3a50;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(148, 163, 184, 0.15);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 16px 48px rgba(37, 99, 235, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        p {
            color: var(--text-secondary);
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
        }
        .logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list li a.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.2);
        }
        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-gradient);
            border-radius: 4px;
        }
        .nav-list li.nav-cta a {
            background: var(--primary-gradient);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
        }
        .nav-list li.nav-cta a:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
            background: linear-gradient(135deg, #1d4ed8 0%, #6d28d9 100%);
        }
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 34, 54, 0.88)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            margin-bottom: 16px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 24px;
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: var(--text-secondary);
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 620px;
            margin: 0 auto 48px;
        }

        /* ===== Guide Steps ===== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 16px;
        }
        .step-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== Content Cards ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .content-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .content-card .card-body {
            padding: 22px 24px 26px;
        }
        .content-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(37, 99, 235, 0.2);
            color: var(--primary-light);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }
        .content-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .content-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .content-card .card-meta i {
            margin-right: 4px;
        }
        .card-link {
            color: var(--primary-light);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .card-link:hover {
            color: var(--accent);
            gap: 10px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.25);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            background: transparent;
            transition: var(--transition);
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            color: var(--primary-light);
            font-size: 18px;
            transition: var(--transition);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 34px;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }
        .footer-social a {
            display: inline-block;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-muted);
            margin-right: 8px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary-gradient);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

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

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list li a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
            }
            .nav-list li.nav-cta a {
                justify-content: center;
                margin-top: 8px;
            }
            .nav-toggle {
                display: block;
            }
            .page-hero {
                padding: 110px 0 60px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .guide-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .content-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }
            .step-card {
                padding: 24px 18px;
            }
            .content-card .card-body {
                padding: 16px 18px 20px;
            }
        }

        /* ===== Utilities ===== */
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .gap-4 {
            gap: 4px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #6c5ce7;
        --primary-dark: #5a4bd1;
        --primary-light: #a29bfe;
        --secondary: #fd79a8;
        --accent: #00cec9;
        --bg-dark: #0f0b1a;
        --bg-body: #0f0b1a;
        --bg-card: #1a1530;
        --bg-card-hover: #221d3a;
        --bg-section: #14102a;
        --bg-section-alt: #1a1530;
        --text-main: #f0ecf9;
        --text-secondary: #b8b0d4;
        --text-muted: #7a72a0;
        --border-color: #2d2650;
        --border-light: #3d3570;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 22px;
        --radius-xl: 30px;
        --shadow-sm: 0 2px 12px rgba(108,92,231,0.08);
        --shadow-md: 0 8px 32px rgba(108,92,231,0.15);
        --shadow-lg: 0 16px 56px rgba(108,92,231,0.22);
        --shadow-glow: 0 0 40px rgba(108,92,231,0.18);
        --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --max-width: 1200px;
        --header-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-body);
        color: var(--text-main);
        line-height: 1.7;
        font-size: 16px;
        min-height: 100vh;
        overflow-x: hidden;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: #fff; }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) {
        .container { padding: 0 16px; }
    }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: var(--header-height);
        background: rgba(15, 11, 26, 0.92);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border-color);
        z-index: 1000;
        transition: background var(--transition), border-color var(--transition);
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: #fff;
        letter-spacing: -0.3px;
    }
    .logo i {
        color: var(--primary-light);
        font-size: 26px;
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo span {
        background: linear-gradient(135deg, #fff 60%, var(--primary-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo:hover { color: #fff; }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-list li a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-size: 15px;
        font-weight: 500;
        transition: all var(--transition);
        position: relative;
    }
    .nav-list li a::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%) scaleX(0);
        width: 60%;
        height: 2px;
        background: var(--primary-light);
        border-radius: 2px;
        transition: transform var(--transition);
    }
    .nav-list li a:hover::after,
    .nav-list li a.active::after { transform: translateX(-50%) scaleX(1); }
    .nav-list li a:hover { color: #fff; background: rgba(108,92,231,0.1); }
    .nav-list li a.active { color: #fff; background: rgba(108,92,231,0.15); }
    .nav-list li.nav-cta { margin-left: 8px; }
    .nav-list li.nav-cta a::after { display: none; }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: var(--radius-md);
        font-weight: 600;
        font-size: 15px;
        cursor: pointer;
        transition: all var(--transition);
        border: none;
        line-height: 1.2;
        letter-spacing: 0.2px;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        box-shadow: 0 4px 20px rgba(108,92,231,0.35);
    }
    .btn-primary:hover {
        background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 32px rgba(108,92,231,0.45);
    }
    .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 12px rgba(108,92,231,0.3); }
    .btn-secondary {
        background: rgba(108,92,231,0.12);
        color: var(--primary-light);
        border: 1px solid var(--border-color);
    }
    .btn-secondary:hover {
        background: rgba(108,92,231,0.22);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
    }
    .btn-sm { padding: 8px 20px; font-size: 14px; border-radius: var(--radius-sm); }
    .btn-lg { padding: 16px 38px; font-size: 17px; border-radius: var(--radius-md); }
    .btn .fa-arrow-right { font-size: 13px; transition: transform var(--transition); }
    .btn:hover .fa-arrow-right { transform: translateX(4px); }

    .nav-toggle {
        display: none;
        background: transparent;
        color: var(--text-main);
        font-size: 24px;
        cursor: pointer;
        padding: 8px 12px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
        transition: all var(--transition);
    }
    .nav-toggle:hover { background: rgba(108,92,231,0.1); border-color: var(--primary); }

    @media (max-width: 768px) {
        .nav-toggle { display: block; }
        .nav-list {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: rgba(15, 11, 26, 0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 20px 24px 28px;
            gap: 6px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-110%);
            opacity: 0;
            pointer-events: none;
            transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .nav-list.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .nav-list li { width: 100%; }
        .nav-list li a { display: block; padding: 12px 16px; text-align: center; }
        .nav-list li a::after { display: none; }
        .nav-list li.nav-cta { margin-left: 0; margin-top: 8px; }
        .nav-list li.nav-cta a { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: var(--radius-sm); }
        .logo { font-size: 19px; }
        .logo i { font-size: 22px; }
    }

    /* ===== Page Hero / Banner ===== */
    .page-banner {
        padding: 140px 0 60px;
        background: linear-gradient(135deg, rgba(15,11,26,0.95), rgba(26,21,48,0.9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        border-bottom: 1px solid var(--border-color);
        position: relative;
    }
    .page-banner::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 80px;
        background: linear-gradient(to top, var(--bg-body), transparent);
        pointer-events: none;
    }
    .page-banner .container {
        position: relative;
        z-index: 1;
        text-align: center;
    }
    .page-banner h1 {
        font-size: 34px;
        font-weight: 800;
        color: #fff;
        line-height: 1.3;
        margin-bottom: 12px;
        letter-spacing: -0.5px;
    }
    .page-banner .meta {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
        color: var(--text-secondary);
        font-size: 14px;
    }
    .page-banner .meta span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .page-banner .meta i { color: var(--primary-light); font-size: 14px; }
    .page-banner .breadcrumb {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        margin-bottom: 16px;
        font-size: 14px;
        color: var(--text-muted);
    }
    .page-banner .breadcrumb a { color: var(--text-secondary); }
    .page-banner .breadcrumb a:hover { color: #fff; }
    .page-banner .breadcrumb .sep { color: var(--text-muted); font-size: 12px; }

    @media (max-width: 768px) {
        .page-banner { padding: 120px 0 40px; }
        .page-banner h1 { font-size: 24px; }
        .page-banner .meta { gap: 12px; font-size: 13px; }
    }

    /* ===== Article Content ===== */
    .article-section {
        padding: 50px 0 80px;
    }
    .article-wrapper {
        display: grid;
        grid-template-columns: 1fr 340px;
        gap: 48px;
        align-items: start;
    }
    .article-main {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 40px 44px;
        box-shadow: var(--shadow-sm);
    }
    .article-main .content {
        font-size: 16.5px;
        line-height: 1.9;
        color: var(--text-main);
    }
    .article-main .content p {
        margin-bottom: 20px;
    }
    .article-main .content h2, .article-main .content h3 {
        margin-top: 36px;
        margin-bottom: 16px;
        color: #fff;
        font-weight: 700;
        letter-spacing: -0.3px;
    }
    .article-main .content h2 { font-size: 24px; }
    .article-main .content h3 { font-size: 20px; }
    .article-main .content ul, .article-main .content ol {
        margin-bottom: 20px;
        padding-left: 24px;
    }
    .article-main .content ul li {
        list-style: disc;
        margin-bottom: 6px;
        color: var(--text-secondary);
    }
    .article-main .content ol li {
        list-style: decimal;
        margin-bottom: 6px;
        color: var(--text-secondary);
    }
    .article-main .content a { color: var(--primary-light); text-decoration: underline; }
    .article-main .content a:hover { color: #fff; }
    .article-main .content img {
        border-radius: var(--radius-md);
        margin: 24px 0;
        box-shadow: var(--shadow-md);
    }
    .article-main .content blockquote {
        border-left: 4px solid var(--primary);
        background: rgba(108,92,231,0.08);
        padding: 16px 24px;
        margin: 20px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-main .content code {
        background: rgba(108,92,231,0.15);
        padding: 2px 10px;
        border-radius: 4px;
        font-size: 14px;
        color: var(--primary-light);
    }
    .article-main .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
    }
    .article-main .tag-list .tag {
        padding: 4px 16px;
        border-radius: 20px;
        background: rgba(108,92,231,0.12);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        font-size: 13px;
        transition: all var(--transition);
    }
    .article-main .tag-list .tag:hover {
        background: rgba(108,92,231,0.22);
        border-color: var(--primary);
        color: #fff;
    }
    .article-main .not-found {
        text-align: center;
        padding: 60px 20px;
    }
    .article-main .not-found i { font-size: 48px; color: var(--text-muted); margin-bottom: 20px; }
    .article-main .not-found h2 { color: var(--text-main); margin-bottom: 12px; }
    .article-main .not-found p { color: var(--text-muted); margin-bottom: 24px; }

    /* ===== Sidebar ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 28px 24px;
        box-shadow: var(--shadow-sm);
    }
    .sidebar-card h3 {
        font-size: 17px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-card h3 i { color: var(--primary-light); font-size: 16px; }
    .sidebar-card .side-list li {
        padding: 10px 0;
        border-bottom: 1px solid rgba(45,38,80,0.5);
    }
    .sidebar-card .side-list li:last-child { border-bottom: none; }
    .sidebar-card .side-list li a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.5;
        transition: all var(--transition);
    }
    .sidebar-card .side-list li a:hover { color: #fff; }
    .sidebar-card .side-list li a i { color: var(--primary-light); font-size: 12px; margin-top: 4px; flex-shrink: 0; }
    .sidebar-card .side-list li a .side-date {
        font-size: 12px;
        color: var(--text-muted);
        display: block;
        margin-top: 2px;
    }
    .sidebar-cta {
        background: linear-gradient(135deg, rgba(108,92,231,0.12), rgba(253,121,168,0.08));
        border: 1px solid var(--border-color);
        text-align: center;
        padding: 32px 20px;
    }
    .sidebar-cta h3 { border-bottom: none; justify-content: center; }
    .sidebar-cta p { color: var(--text-secondary); font-size: 14px; margin-bottom: 20px; }
    .sidebar-cta .btn { width: 100%; justify-content: center; }

    @media (max-width: 1024px) {
        .article-wrapper { grid-template-columns: 1fr; gap: 32px; }
        .article-main { padding: 28px 24px; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    }
    @media (max-width: 640px) {
        .article-main { padding: 20px 16px; }
        .article-main .content { font-size: 15px; }
        .article-sidebar { grid-template-columns: 1fr; }
    }

    /* ===== Related Section ===== */
    .related-section {
        padding: 60px 0 80px;
        background: var(--bg-section);
    }
    .related-section .section-title {
        text-align: center;
        font-size: 28px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 12px;
        letter-spacing: -0.5px;
    }
    .related-section .section-sub {
        text-align: center;
        color: var(--text-secondary);
        font-size: 16px;
        margin-bottom: 40px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .related-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition);
    }
    .related-card:hover {
        transform: translateY(-6px);
        border-color: var(--primary);
        box-shadow: var(--shadow-lg);
    }
    .related-card .card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: 0;
    }
    .related-card .card-body {
        padding: 20px 22px 24px;
    }
    .related-card .card-body h4 {
        font-size: 17px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .related-card .card-body h4 a { color: #fff; }
    .related-card .card-body h4 a:hover { color: var(--primary-light); }
    .related-card .card-body p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .related-card .card-body .meta-sm {
        display: flex;
        align-items: center;
        gap: 14px;
        font-size: 12px;
        color: var(--text-muted);
    }
    .related-card .card-body .meta-sm i { color: var(--primary-light); font-size: 12px; margin-right: 3px; }

    @media (max-width: 1024px) {
        .related-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
        .related-grid { grid-template-columns: 1fr; }
        .related-section .section-title { font-size: 22px; }
    }

    /* ===== FAQ Section ===== */
    .faq-section {
        padding: 70px 0 80px;
        background: var(--bg-section-alt);
    }
    .faq-section .section-title {
        text-align: center;
        font-size: 28px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 12px;
    }
    .faq-section .section-sub {
        text-align: center;
        color: var(--text-secondary);
        font-size: 16px;
        margin-bottom: 44px;
    }
    .faq-grid {
        max-width: 780px;
        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-md);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--border-light); }
    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        background: transparent;
        color: var(--text-main);
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        text-align: left;
        transition: all var(--transition);
        gap: 16px;
    }
    .faq-question:hover { color: #fff; background: rgba(108,92,231,0.04); }
    .faq-question .fa-chevron-down {
        color: var(--text-muted);
        font-size: 14px;
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-item.open .faq-question .fa-chevron-down { transform: rotate(180deg); color: var(--primary-light); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease;
        padding: 0 24px;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }
    .faq-answer p {
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.7;
    }

    /* ===== CTA Section ===== */
    .cta-section {
        padding: 70px 0 80px;
        background: linear-gradient(135deg, rgba(108,92,231,0.08), rgba(253,121,168,0.04)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .cta-section .container {
        text-align: center;
        max-width: 680px;
    }
    .cta-section h2 {
        font-size: 30px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: -0.5px;
    }
    .cta-section p {
        color: var(--text-secondary);
        font-size: 17px;
        margin-bottom: 30px;
        line-height: 1.6;
    }
    .cta-section .btn-group {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }

    @media (max-width: 640px) {
        .cta-section h2 { font-size: 22px; }
        .cta-section p { font-size: 15px; }
        .cta-section .btn-group { flex-direction: column; }
        .cta-section .btn-group .btn { width: 100%; justify-content: center; }
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-dark);
        border-top: 1px solid var(--border-color);
        padding: 60px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .logo { margin-bottom: 14px; font-size: 20px; }
    .footer-brand p { color: var(--text-secondary); font-size: 14px; line-height: 1.7; max-width: 320px; }
    .footer-col h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 16px;
        letter-spacing: 0.3px;
    }
    .footer-col a {
        display: block;
        color: var(--text-secondary);
        font-size: 14px;
        padding: 5px 0;
        transition: all var(--transition);
    }
    .footer-col a:hover { color: #fff; padding-left: 4px; }
    .footer-col a i { width: 20px; color: var(--primary-light); }
    .footer-social { display: flex; gap: 12px; }
    .footer-social a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background: rgba(108,92,231,0.1);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        font-size: 16px;
        padding: 0;
        transition: all var(--transition);
    }
    .footer-social a:hover {
        background: rgba(108,92,231,0.25);
        border-color: var(--primary);
        color: #fff;
        transform: translateY(-3px);
    }
    .footer-bottom {
        border-top: 1px solid var(--border-color);
        padding-top: 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        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); }

    @media (max-width: 1024px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 640px) {
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    /* ===== Utilities ===== */
    .text-center { text-align: center; }
    .mt-8 { margin-top: 8px; }
    .mt-16 { margin-top: 16px; }
    .mb-16 { margin-bottom: 16px; }
    .gap-8 { gap: 8px; }

    /* ===== Scrollbar ===== */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg-dark); }
    ::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--primary); }

    /* ===== Focus ===== */
    a:focus-visible, button:focus-visible, input:focus-visible {
        outline: 2px solid var(--primary-light);
        outline-offset: 2px;
        border-radius: 4px;
    }