/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a45;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a1e;
            --bg-body: #f5f6fa;
            --bg-card: #ffffff;
            --bg-dark: #121828;
            --bg-dark-card: #1e2640;
            --text: #1c1e2e;
            --text-light: #5a5e7a;
            --text-white: #f0f2f8;
            --border: #e0e3ed;
            --border-light: #f0f2f8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 8px 32px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --nav-width: 260px;
            --nav-width-collapsed: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2.0rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; color: var(--text-light); }

        /* ===== Layout ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar (App Shell Left Nav) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition), width var(--transition);
            box-shadow: 2px 0 20px rgba(0,0,0,0.2);
            overflow-y: auto;
        }
        .sidebar-logo {
            padding: 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--bg-dark);
            flex-shrink: 0;
        }
        .sidebar-logo .logo-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
        }
        .sidebar-logo .logo-text span {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255,255,255,0.3);
            padding: 12px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255,255,255,0.4);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: rgba(255,255,255,0.06);
            color: var(--text-white);
        }
        .sidebar-nav a:hover i { color: var(--accent); }
        .sidebar-nav a.active {
            background: rgba(232,168,56,0.12);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active i { color: var(--accent); }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.3);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            transition: margin-left var(--transition);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-header .menu-toggle:hover { background: rgba(255,255,255,0.06); }
        .mobile-header .mobile-logo {
            font-weight: 700;
            font-size: 1.0rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-header .mobile-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: var(--bg-dark);
        }

        /* ===== Overlay ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a5c 100%);
            overflow: hidden;
            min-height: 460px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(232,168,56,0.15);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(232,168,56,0.2);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.0rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--bg-dark);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--bg-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232,168,56,0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.25);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.85rem;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 70px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .label {
            display: inline-block;
            background: rgba(26,42,108,0.06);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-light);
        }

        /* ===== Features / Cards Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }
        .card .icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(26,42,108,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .card:hover .icon { background: var(--accent); color: var(--bg-dark); }
        .card h3 { margin-bottom: 8px; font-size: 1.15rem; }
        .card p { font-size: 0.92rem; }
        .card .badge {
            display: inline-block;
            background: rgba(232,168,56,0.1);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-top: 10px;
        }

        /* ===== Cover Card (分类入口) ===== */
        .cover-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            cursor: pointer;
        }
        .cover-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .cover-card .cover-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: var(--transition);
        }
        .cover-card:hover .cover-img { transform: scale(1.03); }
        .cover-card .cover-body {
            padding: 18px 20px 22px;
        }
        .cover-card .cover-body h3 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .cover-card .cover-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .cover-card .cover-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--bg-dark);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.3px;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
            z-index: 2;
        }
        .stats-item {
            text-align: center;
            padding: 20px;
        }
        .stats-item .num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stats-item .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
        }

        /* ===== Latest Posts / List ===== */
        .post-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .post-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            padding: 18px 22px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .post-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .post-item .post-rank {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            width: 40px;
            flex-shrink: 0;
            text-align: center;
            line-height: 1.2;
        }
        .post-item .post-content { flex: 1; }
        .post-item .post-content h4 {
            font-size: 1.0rem;
            margin-bottom: 4px;
        }
        .post-item .post-content h4 a { color: var(--text); }
        .post-item .post-content h4 a:hover { color: var(--accent); }
        .post-item .post-meta {
            display: flex;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-light);
        }
        .post-item .post-meta .cat {
            background: rgba(26,42,108,0.06);
            padding: 0 10px;
            border-radius: 4px;
            color: var(--primary);
        }
        .post-empty {
            text-align: center;
            padding: 40px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            color: var(--text-light);
            border: 1px dashed var(--border);
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 14px;
        }
        .step-card h4 { margin-bottom: 6px; font-size: 1.05rem; }
        .step-card p { font-size: 0.85rem; }
        .step-card .step-arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.4rem;
            color: var(--border);
        }
        .steps-grid .step-card:last-child .step-arrow { display: none; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i { color: var(--accent); transition: var(--transition); }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.92rem;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a5c 100%);
            padding: 70px 0;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.6);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary { font-size: 1.1rem; padding: 16px 44px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.5);
            padding: 48px 0 32px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-grid h4 {
            color: var(--text-white);
            font-size: 1.0rem;
            margin-bottom: 16px;
        }
        .footer-grid p { color: rgba(255,255,255,0.4); font-size: 0.85rem; }
        .footer-grid ul li { margin-bottom: 8px; }
        .footer-grid ul li a {
            color: rgba(255,255,255,0.45);
            font-size: 0.85rem;
        }
        .footer-grid ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
        }
        .footer-bottom span { color: rgba(255,255,255,0.3); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open { transform: translateX(0); }
            .sidebar-overlay.active { display: block; }
            .main-content { margin-left: 0; }
            .mobile-header { display: flex; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .hero { padding: 60px 0 50px; min-height: auto; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .section { padding: 50px 0; }
            .container { padding: 0 18px; }
            .post-item { flex-direction: column; gap: 8px; }
            .post-item .post-rank { width: auto; text-align: left; }
            .step-card .step-arrow { display: none; }
            .cta-section h2 { font-size: 1.6rem; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.5rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn { width: 100%; justify-content: center; }
            .stats-item .num { font-size: 2.0rem; }
            .section-header h2 { font-size: 1.4rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a1628;
            --primary-light: #1a2d4a;
            --primary-mid: #0f1f3a;
            --accent: #d4a843;
            --accent-hover: #e8bc5a;
            --accent-glow: rgba(212, 168, 67, 0.25);
            --blue-accent: #2e7be6;
            --blue-hover: #4a92f5;
            --bg-body: #0a1628;
            --bg-card: #112240;
            --bg-card-hover: #1a2d4a;
            --bg-section-alt: #0d1e33;
            --text-primary: #f0f4f8;
            --text-secondary: #c8d0dc;
            --text-muted: #8896a8;
            --border-color: rgba(212, 168, 67, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 220px;
            --header-height: 0px;
        }

        /* ===== 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-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-hover); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Left Sidebar Navigation ===== */
        .app-shell {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-light);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 24px;
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .sidebar-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.5px;
            margin-bottom: 32px;
            padding: 0 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo i { font-size: 1.6rem; color: var(--accent); }
        .sidebar-logo span { background: linear-gradient(135deg, var(--accent), #f0d080); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--text-muted);
            margin: 20px 0 8px 8px;
            font-weight: 600;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 2px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1rem; color: var(--text-muted); transition: color var(--transition); }
        .sidebar-nav a:hover { background: rgba(212, 168, 67, 0.08); color: var(--text-primary); }
        .sidebar-nav a:hover i { color: var(--accent); }
        .sidebar-nav a.active {
            background: rgba(212, 168, 67, 0.12);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active i { color: var(--accent); }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 4px 4px 0;
        }
        .sidebar-nav .nav-divider {
            border-top: 1px solid var(--border-light);
            margin: 16px 8px;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--sidebar-width));
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--primary);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .logo-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
        }
        .mobile-menu-btn {
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-btn:hover { background: rgba(255,255,255,0.06); }
        .mobile-menu-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 50%, #0d1e33 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(212,168,67,0.08) 0%, transparent 70%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .page-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212,168,67,0.12);
            border: 1px solid rgba(212,168,67,0.2);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent);
            margin-bottom: 20px;
            font-weight: 500;
        }
        .hero-stats-row {
            display: flex;
            gap: 40px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1rem;
        }
        .section-header .accent-line {
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Sport Categories Grid ===== */
        .sport-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .sport-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 20px 24px;
            text-align: center;
            transition: all var(--transition);
            cursor: default;
        }
        .sport-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212,168,67,0.2);
            background: var(--bg-card-hover);
        }
        .sport-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(212,168,67,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .sport-card:hover .icon-wrap { background: rgba(212,168,67,0.2); transform: scale(1.05); }
        .sport-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; color: var(--text-primary); }
        .sport-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
        .sport-card .badge {
            display: inline-block;
            background: rgba(46, 123, 230, 0.15);
            color: var(--blue-accent);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
            margin-top: 12px;
        }

        /* ===== Featured Cards (Hot Events) ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .featured-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212,168,67,0.15);
        }
        .featured-card .thumb {
            height: 180px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .featured-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .featured-card:hover .thumb img { transform: scale(1.05); }
        .featured-card .thumb .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 50px;
            text-transform: uppercase;
        }
        .featured-card .body {
            padding: 20px;
        }
        .featured-card .body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .featured-card .body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .featured-card .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .featured-card .meta i { color: var(--accent); margin-right: 4px; }

        /* ===== Stats / Data Section ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(212,168,67,0.2);
            box-shadow: var(--shadow-sm);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-card .num sup { font-size: 1rem; font-weight: 500; color: var(--text-muted); }
        .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        .stat-card .icon {
            font-size: 1.8rem;
            color: rgba(212,168,67,0.2);
            margin-bottom: 12px;
        }

        /* ===== Steps / Guide ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), rgba(212,168,67,0.1));
            z-index: 0;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            position: relative;
            z-index: 1;
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: rgba(212,168,67,0.2);
        }
        .step-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
        .step-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            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: border-color var(--transition);
        }
        .faq-item:hover { border-color: rgba(212,168,67,0.15); }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            list-style: none;
            transition: color var(--transition);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--accent);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after { transform: rotate(180deg); }
        .faq-item[open] summary { color: var(--accent); }
        .faq-item .answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-mid), var(--primary));
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .cta-box {
            text-align: center;
            padding: 56px 24px;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,22,40,0.88), rgba(13,30,51,0.92));
            z-index: 0;
        }
        .cta-box > * { position: relative; z-index: 1; }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .cta-box p {
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 1rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px var(--accent-glow);
        }
        .btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-grid h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-grid p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-grid ul li { margin-bottom: 8px; }
        .footer-grid ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-grid ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom i { color: var(--accent); margin-right: 4px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .sport-grid { grid-template-columns: repeat(2, 1fr); }
            .featured-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .page-hero h1 { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            :root { --sidebar-width: 0px; }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open { transform: translateX(0); }
            .main-content {
                margin-left: 0;
                width: 100%;
            }
            .mobile-header { display: flex; }
            .page-hero { padding: 56px 0 48px; }
            .page-hero h1 { font-size: 1.8rem; }
            .page-hero p { font-size: 0.95rem; }
            .hero-stats-row { gap: 24px; }
            .hero-stat-item .num { font-size: 1.4rem; }
            .section { padding: 48px 0; }
            .section-header h2 { font-size: 1.5rem; }
            .sport-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .featured-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .steps-grid { grid-template-columns: 1fr; gap: 16px; }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-box h2 { font-size: 1.5rem; }
            .btn-group { flex-direction: column; align-items: center; }
            .stat-card .num { font-size: 1.8rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.5rem; }
            .sport-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .hero-stats-row { flex-direction: column; gap: 14px; }
            .section-header h2 { font-size: 1.3rem; }
            .sport-card { padding: 20px 16px; }
            .featured-card .thumb { height: 140px; }
            .stat-card { padding: 20px 16px; }
            .step-card { padding: 24px 16px; }
            .faq-item summary { padding: 14px 16px; font-size: 0.9rem; }
            .faq-item .answer { padding: 0 16px 14px; font-size: 0.85rem; }
            .cta-box { padding: 36px 16px; }
            .btn { padding: 12px 28px; font-size: 0.88rem; }
        }

        /* ===== Overlay for mobile menu ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 998;
        }
        .sidebar-overlay.active { display: block; }
        @media (max-width: 768px) {
            .sidebar-overlay.active { display: block; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .text-muted { color: var(--text-muted); }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2d4a;
            --primary-dark: #080f1a;
            --accent: #d4a853;
            --accent-light: #e8c26a;
            --accent-dark: #b8923e;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-sidebar: #0f1b2d;
            --bg-footer: #0a1424;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-on-dark: #e8edf2;
            --text-on-accent: #1a2332;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-accent: 0 4px 20px rgba(212, 168, 83, 0.3);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 260px;
            --header-height: 0px;
            --max-width: 1200px;
        }

        /* ===== 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-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

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

        /* ===== Layout: Sidebar + Main ===== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-on-dark);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 28px 0 20px;
            overflow-y: auto;
            transition: transform var(--transition);
            border-right: 1px solid var(--border-light);
        }
        .sidebar-logo {
            padding: 0 24px 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
        }
        .sidebar-logo a {
            font-size: 22px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo a i {
            color: var(--accent);
            font-size: 26px;
        }
        .sidebar-logo a:hover {
            color: var(--accent-light);
        }
        .sidebar-logo .logo-sub {
            font-size: 12px;
            color: var(--text-light);
            font-weight: 400;
            margin-top: 2px;
            letter-spacing: 0.5px;
        }
        .sidebar-nav {
            padding: 0 12px;
            flex: 1;
        }
        .sidebar-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--text-light);
            padding: 12px 12px 8px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-on-dark);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            background: rgba(212, 168, 83, 0.12);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active i {
            color: var(--accent);
        }
        .sidebar-footer-nav {
            padding: 16px 12px 0;
            border-top: 1px solid var(--border-light);
            margin-top: auto;
        }
        .sidebar-footer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-size: 13px;
            transition: var(--transition);
        }
        .sidebar-footer-nav a:hover {
            color: var(--text-on-dark);
            background: rgba(255, 255, 255, 0.04);
        }

        /* ===== Mobile Menu Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            color: #ffffff;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: 100%;
        }

        /* ===== Article Hero / Banner ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #ffffff;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.88) 0%, rgba(15, 27, 45, 0.72) 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .article-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        .article-hero .article-category {
            display: inline-block;
            background: var(--accent);
            color: var(--text-on-accent);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            max-width: 800px;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-hero .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            flex-wrap: wrap;
        }
        .article-hero .article-meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        .article-hero .article-meta span {
            display: flex;
            align-items: center;
        }
        .article-hero .article-excerpt {
            margin-top: 20px;
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 720px;
            line-height: 1.7;
            border-left: 3px solid var(--accent);
            padding-left: 20px;
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 48px 0 40px;
            background: #ffffff;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-content {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-content .featured-image {
            margin-bottom: 32px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .article-content .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .article-content h2 {
            font-size: 26px;
            margin: 40px 0 16px;
            color: var(--text-primary);
        }
        .article-content h3 {
            font-size: 21px;
            margin: 32px 0 12px;
            color: var(--text-primary);
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 24px;
            list-style: disc;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--bg-body);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-content a {
            color: var(--accent-dark);
            text-decoration: underline;
        }
        .article-content a:hover {
            color: var(--accent);
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-widget {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
        }
        .sidebar-widget h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            display: inline-block;
        }
        .sidebar-widget ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-widget ul li:last-child {
            border-bottom: none;
        }
        .sidebar-widget ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget ul li a:hover {
            color: var(--accent-dark);
        }
        .sidebar-widget ul li a i {
            color: var(--accent);
            font-size: 12px;
        }
        .sidebar-widget .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-widget .tag-cloud a {
            background: #ffffff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .sidebar-widget .tag-cloud a:hover {
            background: var(--accent);
            color: var(--text-on-accent);
            border-color: var(--accent);
        }

        /* ===== Article Tags & Share ===== */
        .article-tags-share {
            padding: 24px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            margin: 32px 0 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-tags .tag-label {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 500;
        }
        .article-tags .tag-item {
            background: var(--bg-body);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        .article-tags .tag-item:hover {
            background: var(--accent);
            color: var(--text-on-accent);
            border-color: var(--accent);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share .share-label {
            font-size: 14px;
            color: var(--text-light);
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-body);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-share a:hover {
            background: var(--accent);
            color: var(--text-on-accent);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== Article Navigation (prev/next) ===== */
        .article-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 32px;
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            padding: 20px 24px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-nav a:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .article-nav .nav-direction {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-nav .nav-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .article-nav a:hover .nav-title {
            color: var(--accent-dark);
        }
        .article-nav .nav-next {
            text-align: right;
        }
        .article-nav .nav-next .nav-direction {
            justify-content: flex-end;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 48px;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .related-section .section-sub {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 32px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--accent);
        }
        .related-card .card-img {
            height: 180px;
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .card-cat {
            font-size: 12px;
            color: var(--accent-dark);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 60px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #ffffff;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 45, 0.75);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-on-accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--text-on-accent);
            box-shadow: var(--shadow-accent);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            transform: translateY(-2px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 60px 0 48px;
            background: #ffffff;
        }
        .faq-section .section-title {
            font-size: 28px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 8px;
        }
        .faq-section .section-sub {
            text-align: center;
            color: var(--text-light);
            margin-bottom: 40px;
            font-size: 16px;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            padding: 18px 24px;
            background: var(--bg-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            font-size: 14px;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: var(--bg-body);
        }
        .faq-answer.open {
            padding: 18px 24px;
            max-height: 300px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box i {
            font-size: 56px;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-box .btn {
            display: inline-flex;
        }

        /* ===== Footer ===== */
        .site-footer {
            padding: 48px 0 0;
            background: var(--bg-footer);
            color: var(--text-on-dark);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-light);
        }
        .footer-grid h4 {
            font-size: 16px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-grid h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-grid p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-grid ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-grid ul li a i {
            font-size: 10px;
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom i {
            color: var(--accent);
            margin-right: 6px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .mobile-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 0;
            }
            .article-hero {
                padding: 60px 0 40px;
            }
            .article-hero h1 {
                font-size: 26px;
            }
            .article-hero .article-excerpt {
                font-size: 15px;
                padding-left: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .article-nav {
                grid-template-columns: 1fr;
            }
            .article-tags-share {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .sidebar-logo a {
                font-size: 20px;
            }
            .container {
                padding: 0 16px;
            }
            .article-content {
                font-size: 16px;
            }
            .article-content h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 22px;
            }
            .article-hero .article-meta {
                font-size: 13px;
                gap: 12px;
            }
            .related-card .card-body h4 {
                font-size: 15px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-section .section-title {
                font-size: 24px;
            }
            .related-section .section-title {
                font-size: 24px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }