/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #2d2d4a;
            --secondary: #e94560;
            --accent: #f5a623;
            --accent-glow: #f5a623cc;
            --bg-dark: #0f0f1a;
            --bg-card: #1a1a2ecc;
            --bg-card-hover: #2a2a44cc;
            --bg-section: #12121f;
            --bg-section-alt: #1a1a2f;
            --text-light: #f0eef6;
            --text-muted: #a8a5c0;
            --text-soft: #c8c4e0;
            --border-subtle: #2d2d4a;
            --border-glow: #e9456044;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(233, 69, 96, 0.08);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(233, 69, 96, 0.2);
            --shadow-glow: 0 0 40px rgba(245, 166, 35, 0.15);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-heading: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-h: 0px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
            padding-left: var(--sidebar-width);
            min-height: 100vh;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        ::selection {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary);
        }

        /* ===== Sidebar Navigation (App Shell) ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-subtle);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 0;
            overflow-y: auto;
            backdrop-filter: blur(12px);
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.5);
        }
        .sidebar-brand {
            padding: 24px 20px 16px;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 20px rgba(233, 69, 96, 0.3);
        }
        .sidebar-brand .brand-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 0.5px;
            font-family: var(--font-heading);
            line-height: 1.3;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            list-style: none;
        }
        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-soft);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
            text-decoration: none;
        }
        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .sidebar-nav .nav-link:hover {
            background: var(--bg-card);
            color: var(--text-light);
            transform: translateX(4px);
        }
        .sidebar-nav .nav-link:hover i {
            color: var(--accent);
        }
        .sidebar-nav .nav-link.active {
            background: linear-gradient(135deg, rgba(233, 69, 96, 0.2), rgba(245, 166, 35, 0.1));
            color: var(--accent);
            border: 1px solid var(--border-glow);
            box-shadow: 0 0 20px rgba(233, 69, 96, 0.08);
        }
        .sidebar-nav .nav-link.active i {
            color: var(--accent);
        }
        .sidebar-nav .nav-link.active::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 4px 4px 0;
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--primary);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 1035;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            backdrop-filter: blur(12px);
        }
        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-light);
        }
        .mobile-header .mobile-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
        }
        .mobile-toggle {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--bg-card);
        }
        .mobile-toggle:focus-visible {
            outline: 2px solid var(--accent);
        }

        /* ===== Mobile Drawer Overlay ===== */
        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1045;
            backdrop-filter: blur(4px);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .drawer-overlay.show {
            opacity: 1;
        }

        /* ===== Main Content ===== */
        .main-content {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-custom-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 48px 0;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-section .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.55;
            transform: scale(1.04);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1.04);
            }
            100% {
                transform: scale(1.12);
            }
        }
        .hero-section .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(15, 15, 26, 0.4) 0%, rgba(15, 15, 26, 0.85) 70%, var(--bg-dark) 100%);
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 60px 0;
        }
        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(233, 69, 96, 0.15);
            border: 1px solid rgba(233, 69, 96, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent);
            margin-bottom: 24px;
            backdrop-filter: blur(6px);
        }
        .hero-section .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-section h1 {
            font-family: var(--font-heading);
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            color: var(--text-light);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            max-width: 720px;
        }
        .hero-section h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-section .hero-sub {
            font-size: 1.15rem;
            color: var(--text-soft);
            max-width: 580px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-section .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), #d63850);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: all var(--transition);
            box-shadow: 0 4px 24px rgba(233, 69, 96, 0.35);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 40px rgba(233, 69, 96, 0.5);
            color: #fff;
            background: linear-gradient(135deg, #e94560, #c42d48);
        }
        .btn-primary-custom:active {
            transform: translateY(0);
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            backdrop-filter: blur(6px);
        }
        .btn-secondary-custom:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-muted);
            color: var(--text-light);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-subtle);
            flex-wrap: wrap;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            font-family: var(--font-heading);
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== Section Titles ===== */
        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-header-centered {
            text-align: center;
        }
        .section-header-centered .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(8px);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(233, 69, 96, 0.2);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-subtle);
        }
        .card-custom .card-body {
            padding: 24px;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
            font-family: var(--font-heading);
        }
        .card-custom .card-text {
            color: var(--text-soft);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .card-custom .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            margin-top: 12px;
            flex-wrap: wrap;
        }
        .card-custom .card-meta i {
            margin-right: 4px;
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: 500;
        }

        /* ===== Category Cards (Grid) ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            background: var(--bg-card);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(233, 69, 96, 0.2);
        }
        .category-card .cat-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.6;
            transition: opacity var(--transition), transform var(--transition);
        }
        .category-card:hover .cat-bg {
            opacity: 0.75;
            transform: scale(1.05);
        }
        .category-card .cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 15, 26, 0.95) 0%, rgba(15, 15, 26, 0.3) 60%, transparent 100%);
        }
        .category-card .cat-content {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            width: 100%;
        }
        .category-card .cat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(233, 69, 96, 0.2);
            border: 1px solid rgba(233, 69, 96, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .category-card .cat-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-light);
            font-family: var(--font-heading);
            margin-bottom: 6px;
        }
        .category-card .cat-desc {
            font-size: 0.88rem;
            color: var(--text-soft);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .category-card .cat-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card .cat-link i {
            transition: transform var(--transition);
        }
        .category-card:hover .cat-link i {
            transform: translateX(4px);
        }

        /* ===== Info / List Items ===== */
        .info-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            cursor: default;
        }
        .info-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .info-item .info-icon {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 12px;
            background: rgba(245, 166, 35, 0.1);
            border: 1px solid rgba(245, 166, 35, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent);
        }
        .info-item .info-body {
            flex: 1;
        }
        .info-item .info-title {
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 4px;
        }
        .info-item .info-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .info-item .info-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .step-card .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 30px rgba(233, 69, 96, 0.2);
        }
        .step-card .step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
            font-family: var(--font-heading);
        }
        .step-card .step-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 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-subtle);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(233, 69, 96, 0.15);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-light);
            font-size: 0.98rem;
            transition: background var(--transition);
            user-select: none;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-main);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 0.85rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-soft);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #0f0f1a);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(233, 69, 96, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .cta-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            font-family: var(--font-heading);
        }
        .cta-section .cta-desc {
            font-size: 1.05rem;
            color: var(--text-soft);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 24px;
            margin-top: auto;
        }
        .site-footer .footer-brand {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-light);
            font-family: var(--font-heading);
        }
        .site-footer .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            max-width: 360px;
            line-height: 1.7;
            margin-top: 8px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer .footer-links a {
            color: var(--text-soft);
            font-size: 0.9rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            margin-top: 32px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a {
            color: var(--text-soft);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 16px;
            opacity: 0.5;
        }
        .empty-state p {
            font-size: 1rem;
        }

        /* ===== Badge / Tag ===== */
        .badge-custom {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(233, 69, 96, 0.12);
            color: var(--secondary);
            border: 1px solid rgba(233, 69, 96, 0.15);
        }
        .badge-custom.accent {
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent);
            border-color: rgba(245, 166, 35, 0.15);
        }

        /* ===== Divider ===== */
        .divider-glow {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
            margin: 0;
            border: none;
            opacity: 0.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-section h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-left: 0;
                padding-top: 64px;
            }
            .app-sidebar {
                transform: translateX(-100%);
                transition: transform var(--transition);
                box-shadow: none;
            }
            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 8px 0 40px rgba(0, 0, 0, 0.7);
            }
            .mobile-header {
                display: flex;
            }
            .drawer-overlay.show {
                display: block;
            }
            .hero-section {
                min-height: 70vh;
            }
            .hero-section h1 {
                font-size: 2.2rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .category-card {
                min-height: 240px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section .cta-title {
                font-size: 1.5rem;
            }
            .section-padding {
                padding: 48px 0;
            }
            .hero-section .hero-content {
                padding: 40px 0;
            }
            .info-item {
                flex-direction: column;
                gap: 8px;
                padding: 16px 18px;
            }
            .info-item .info-meta {
                white-space: normal;
            }
            .container-custom {
                padding: 0 16px;
            }
            .container-custom-wide {
                padding: 0 16px;
            }
            .hero-stats {
                margin-top: 32px;
                padding-top: 24px;
            }
        }

        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.7rem;
            }
            .hero-section .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-section .hero-actions .btn-primary-custom,
            .hero-section .hero-actions .btn-secondary-custom {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
                align-items: center;
            }
            .category-card {
                min-height: 200px;
            }
            .card-custom .card-img-top {
                height: 160px;
            }
            .sidebar-brand {
                padding: 16px 16px 12px;
            }
            .sidebar-nav {
                padding: 12px 8px;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .cta-section {
                padding: 32px 16px;
            }
            .cta-section .cta-title {
                font-size: 1.3rem;
            }
        }

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

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-secondary-custom {
            color: var(--secondary);
        }
        .bg-section-dark {
            background: var(--bg-section);
        }
        .bg-section-alt {
            background: var(--bg-section-alt);
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --secondary: #0f3460;
            --accent: #e94560;
            --accent2: #f5a623;
            --bg-dark: #0a0a1a;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3a;
            --text-light: #f0f0f0;
            --text-body: #c8c8d8;
            --text-muted: #8888a0;
            --border-color: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --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 20px 60px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 240px;
            --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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-dark);
            padding-left: var(--sidebar-width);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: var(--accent2);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ===== 左侧导航 ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
        }
        .sidebar-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-light);
            line-height: 1.2;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .sidebar-nav {
            list-style: none;
            padding: 16px 12px;
            flex: 1;
            overflow-y: auto;
        }
        .sidebar-nav .nav-item {
            margin-bottom: 4px;
        }
        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 15px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            position: relative;
        }
        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-link:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            transform: translateX(4px);
        }
        .sidebar-nav .nav-link:focus-visible {
            outline: 2px solid var(--accent2);
            outline-offset: 2px;
        }
        .sidebar-nav .nav-link.active {
            background: linear-gradient(135deg, rgba(233, 69, 96, 0.15), rgba(245, 166, 35, 0.08));
            color: var(--accent2);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent2);
        }
        .sidebar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent2);
            box-shadow: 0 0 8px var(--accent2);
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            background: rgba(0, 0, 0, 0.15);
        }

        /* ===== 移动端导航 ===== */
        .mobile-navbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--primary);
            border-bottom: 1px solid var(--border-color);
            z-index: 1060;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .mobile-navbar .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
        }
        .mobile-navbar .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-light);
        }
        .mobile-navbar .hamburger {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 24px;
            padding: 6px 10px;
            border-radius: 8px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .mobile-navbar .hamburger:hover,
        .mobile-navbar .hamburger:focus-visible {
            background: rgba(255, 255, 255, 0.08);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1045;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Hero / 分类Banner ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(233, 69, 96, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(233, 69, 96, 0.12);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(233, 69, 96, 0.2);
        }
        .category-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 24px;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-light);
            display: block;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 64px 0;
        }
        .section-block-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 40px;
        }
        .section-title i {
            color: var(--accent2);
            margin-right: 8px;
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(233, 69, 96, 0.2);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .card-custom .card-body {
            padding: 20px 24px 24px;
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent2);
            border: 1px solid rgba(245, 166, 35, 0.2);
        }
        .card-custom .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-custom .card-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .card-custom .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 16px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }
        .card-custom .card-meta i {
            margin-right: 4px;
        }

        /* ===== 特色卡片（装备/地点） ===== */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(245, 166, 35, 0.15);
        }
        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
        }
        .feature-card .feature-icon.accent {
            background: linear-gradient(135deg, var(--accent), #ff6b81);
        }
        .feature-card .feature-icon.gold {
            background: linear-gradient(135deg, var(--accent2), #f7c948);
        }
        .feature-card .feature-icon.teal {
            background: linear-gradient(135deg, #0f3460, #1a6f7a);
        }
        .feature-card h5 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .feature-card .feature-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent2);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .feature-card .feature-link:hover {
            color: var(--accent);
        }

        /* ===== 时间线 / 流程 ===== */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent2), var(--accent), transparent);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item .timeline-dot {
            position: absolute;
            left: -40px;
            top: 4px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--accent2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent2);
            box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.1);
        }
        .timeline-item .timeline-content {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: border-color var(--transition);
        }
        .timeline-item .timeline-content:hover {
            border-color: rgba(245, 166, 35, 0.2);
        }
        .timeline-item .timeline-content h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 4px;
        }
        .timeline-item .timeline-content p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(245, 166, 35, 0.15);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 15px;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover,
        .faq-item .faq-question:focus-visible {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--accent2);
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 64px 0;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
            background: linear-gradient(135deg, var(--accent), #ff6b81);
            color: #fff;
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
        }
        .btn-custom:hover,
        .btn-custom:focus-visible {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
            background: linear-gradient(135deg, #ff6b81, var(--accent));
            color: #fff;
        }
        .btn-custom-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            border: 2px solid var(--accent2);
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
            background: transparent;
            color: var(--accent2);
        }
        .btn-custom-outline:hover,
        .btn-custom-outline:focus-visible {
            transform: translateY(-2px);
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.2);
            background: rgba(245, 166, 35, 0.08);
            color: var(--accent2);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 360px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent2);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 32px;
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            body {
                padding-left: 0;
                padding-top: 60px;
            }
            .app-sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }
            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.5);
            }
            .mobile-navbar {
                display: flex;
            }
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .category-hero .hero-stats {
                gap: 20px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 22px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-block {
                padding: 40px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .cta-content {
                padding: 40px 0;
            }
        }
        @media (max-width: 767px) {
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .hero-stats {
                gap: 16px;
            }
            .category-hero .hero-stats .stat-item {
                flex: 1;
                min-width: 80px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
            }
            .card-custom .card-img-top {
                height: 180px;
            }
            .timeline {
                padding-left: 32px;
            }
            .timeline-item .timeline-dot {
                left: -32px;
                width: 26px;
                height: 26px;
                font-size: 11px;
            }
            .feature-card {
                padding: 20px 18px;
            }
            .btn-custom,
            .btn-custom-outline {
                padding: 12px 28px;
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding: 0 12px;
            }
            .category-hero {
                padding: 32px 0 28px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 18px;
            }
            .section-title {
                font-size: 20px;
            }
            .card-custom .card-body {
                padding: 16px 18px 20px;
            }
            .card-custom .card-img-top {
                height: 150px;
            }
            .timeline-item .timeline-content {
                padding: 14px 16px;
            }
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .site-footer {
                padding: 32px 0 16px;
            }
        }

        /* ===== 滚动条美化 ===== */
        .sidebar-nav::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        .sidebar-nav::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent) !important;
        }
        .text-accent2 {
            color: var(--accent2) !important;
        }
        .bg-glass {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-color);
        }
        .gap-grid {
            gap: 24px;
        }
        .mt-section {
            margin-top: 64px;
        }
        @media (max-width: 767px) {
            .mt-section {
                margin-top: 40px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e8a87c;
            --accent-hover: #d4895a;
            --accent-glow: rgba(232, 168, 124, 0.25);
            --bg-body: #f8f6f2;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --text-primary: #2d2d3a;
            --text-secondary: #5a5a6e;
            --text-muted: #8888a0;
            --text-light: #f0ede8;
            --text-dark: #1a1a2e;
            --border-light: #e8e3dc;
            --border-card: #f0ece6;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 26, 46, 0.08);
            --shadow-lg: 0 12px 48px rgba(26, 26, 46, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-height: 64px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== 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-primary);
            line-height: 1.7;
            font-size: 16px;
            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: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ===== Layout: Sidebar + Main ===== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            color: var(--text-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 0;
            overflow-y: auto;
            transition: transform var(--transition);
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--sidebar-width));
        }
        @media (max-width: 992px) {
            .app-sidebar {
                transform: translateX(-100%);
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
                width: 100%;
            }
            .sidebar-overlay {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 1035;
            }
            .sidebar-overlay.open {
                display: block;
            }
        }

        /* ===== Sidebar Brand ===== */
        .sidebar-brand {
            padding: 28px 20px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .sidebar-brand .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent), #c9734a);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #1a1a2e;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-weight: 700;
            font-size: 18px;
            color: var(--text-light);
            line-height: 1.2;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-weight: 400;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== Sidebar Nav ===== */
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            margin: 0;
        }
        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 15px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.4);
            transition: color var(--transition);
        }
        .sidebar-nav .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-light);
        }
        .sidebar-nav .nav-link:hover i {
            color: var(--accent);
        }
        .sidebar-nav .nav-link.active {
            background: rgba(232, 168, 124, 0.15);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav .nav-link.active i {
            color: var(--accent);
        }
        .sidebar-nav .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Sidebar Footer ===== */
        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--primary);
            padding: 12px 16px;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 22px;
            padding: 6px 8px;
            cursor: pointer;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .mobile-header .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-header .mobile-brand {
            font-weight: 700;
            color: var(--text-light);
            font-size: 17px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .mobile-brand i {
            color: var(--accent);
        }
        @media (max-width: 992px) {
            .mobile-header {
                display: flex;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary-dark);
            color: var(--text-light);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.3;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.92) 0%, rgba(22, 33, 62, 0.80) 100%);
            z-index: 1;
        }
        .article-hero .container-custom {
            position: relative;
            z-index: 2;
        }
        .article-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(232, 168, 124, 0.18);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(232, 168, 124, 0.2);
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 800px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }
        .article-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .hero-meta i {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .article-hero {
                padding: 60px 0 40px;
                min-height: 260px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-hero .hero-meta {
                gap: 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 576px) {
            .article-hero h1 {
                font-size: 1.3rem;
            }
            .article-hero .hero-badge {
                font-size: 12px;
                padding: 4px 12px;
            }
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 48px 0;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 48px 56px;
            border: 1px solid var(--border-card);
        }
        .article-body .article-summary {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 20px 24px;
            background: var(--bg-body);
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--accent);
            margin-bottom: 36px;
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .article-content p {
            margin-bottom: 1.4em;
        }
        .article-body .article-content h2,
        .article-body .article-content h3,
        .article-body .article-content h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--text-primary);
        }
        .article-body .article-content h2 {
            font-size: 1.6rem;
        }
        .article-body .article-content h3 {
            font-size: 1.3rem;
        }
        .article-body .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            background: var(--bg-body);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            padding-left: 24px;
            margin-bottom: 1.4em;
        }
        .article-body .article-content li {
            margin-bottom: 0.4em;
            list-style: disc;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: 28px 20px;
            }
            .article-body .article-summary {
                font-size: 1rem;
                padding: 16px 18px;
            }
            .article-body .article-content {
                font-size: 1rem;
            }
        }

        /* ===== Tags Section ===== */
        .article-tags {
            padding: 24px 0 8px;
            border-top: 1px solid var(--border-light);
            margin-top: 36px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }
        .article-tags .tag-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-tags .tag-item {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: 50px;
            font-size: 13px;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-tags .tag-item:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        /* ===== Post Navigation ===== */
        .post-nav {
            padding: 40px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
        }
        .post-nav .nav-prev,
        .post-nav .nav-next {
            flex: 1;
            min-width: 200px;
        }
        .post-nav .nav-link-item {
            display: flex;
            flex-direction: column;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .post-nav .nav-link-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--accent);
        }
        .post-nav .nav-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .post-nav .nav-title {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.4;
        }
        .post-nav .nav-next {
            text-align: right;
        }
        .post-nav .nav-prev .nav-label i {
            margin-right: 4px;
        }
        .post-nav .nav-next .nav-label i {
            margin-left: 4px;
        }
        @media (max-width: 576px) {
            .post-nav {
                flex-direction: column;
            }
            .post-nav .nav-prev,
            .post-nav .nav-next {
                min-width: auto;
            }
        }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 56px 0;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .related-section .section-subtitle {
            color: var(--text-muted);
            margin-bottom: 36px;
            font-size: 15px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--accent);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--primary-light);
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-category {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 6px;
        }
        .related-card .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            flex: 1;
        }
        .related-card .card-title a {
            color: inherit;
            text-decoration: none;
        }
        .related-card .card-title a:hover {
            color: var(--accent);
        }
        .related-card .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        @media (max-width: 768px) {
            .related-card .card-img {
                height: 140px;
            }
            .related-card .card-body {
                padding: 16px 18px;
            }
            .related-card .card-title {
                font-size: 0.95rem;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--primary);
            color: var(--text-light);
            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;
            z-index: 0;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 16px;
        }
        .cta-section .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-section .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }
        .cta-section .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .cta-section .cta-form input:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
        }
        .cta-section .cta-form .btn-subscribe {
            padding: 14px 32px;
            border-radius: 50px;
            border: none;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all var(--transition);
        }
        .cta-section .cta-form .btn-subscribe:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 124, 0.3);
        }
        @media (max-width: 576px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section .cta-form input {
                min-width: 100%;
            }
            .cta-section .cta-form .btn-subscribe {
                width: 100%;
            }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box .nf-icon {
            font-size: 56px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .not-found-box h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            text-decoration: none;
        }
        .not-found-box .btn-back:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 124, 0.3);
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .site-footer h6 {
            color: var(--text-light);
            font-weight: 600;
            margin-bottom: 12px;
            font-size: 15px;
        }
        .site-footer .footer-links {
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: color var(--transition);
            text-decoration: none;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
        }

        /* ===== Scrollbar ===== */
        .app-sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .app-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .app-sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 992px) {
            body {
                flex-direction: column;
            }
            .app-sidebar {
                box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
            }
        }
        @media (max-width: 576px) {
            .article-section {
                padding: 32px 0;
            }
            .related-section {
                padding: 40px 0;
            }
            .cta-section {
                padding: 48px 0;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .bg-accent {
            background: var(--accent);
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }
        .me-1 {
            margin-right: 4px;
        }
        .me-2 {
            margin-right: 8px;
        }
        .ms-1 {
            margin-left: 4px;
        }
        .ms-2 {
            margin-left: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        .d-flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .align-items-center {
            align-items: center;
        }
        .justify-content-center {
            justify-content: center;
        }
        .justify-content-between {
            justify-content: space-between;
        }
        .text-center {
            text-align: center;
        }
        .w-100 {
            width: 100%;
        }
        .row {
            display: flex;
            flex-wrap: wrap;
            margin: 0 -12px;
        }
        .row>* {
            padding: 0 12px;
        }
        .col-lg-5 {
            flex: 0 0 41.6667%;
            max-width: 41.6667%;
        }
        .col-lg-4 {
            flex: 0 0 33.3333%;
            max-width: 33.3333%;
        }
        .col-lg-3 {
            flex: 0 0 25%;
            max-width: 25%;
        }
        .col-md-4 {
            flex: 0 0 33.3333%;
            max-width: 33.3333%;
        }
        .col-md-6 {
            flex: 0 0 50%;
            max-width: 50%;
        }
        .col-sm-6 {
            flex: 0 0 50%;
            max-width: 50%;
        }
        .col-12 {
            flex: 0 0 100%;
            max-width: 100%;
        }
        @media (max-width: 768px) {
            .col-lg-5,
            .col-lg-4,
            .col-lg-3,
            .col-md-4,
            .col-md-6 {
                flex: 0 0 100%;
                max-width: 100%;
            }
        }
        @media (min-width: 577px) and (max-width: 768px) {
            .col-sm-6 {
                flex: 0 0 50%;
                max-width: 50%;
            }
        }
        .g-4 {
            gap: 24px;
        }
        .g-3 {
            gap: 16px;
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --accent: #e94560;
            --accent-hover: #d63851;
            --accent-glow: rgba(233, 69, 96, 0.3);
            --bg-dark: #0f0f1a;
            --bg-card: #1c1c30;
            --bg-card-hover: #24243e;
            --text-light: #f0f0f5;
            --text-main: #c8c8d8;
            --text-muted: #8888a0;
            --border-color: #2a2a44;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 30px rgba(233, 69, 96, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ::selection {
            background: var(--accent);
            color: #fff;
        }
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Layout: Left Sidebar + Main ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .app-sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            background: var(--primary);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1000;
            padding: 24px 16px;
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .app-main {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Sidebar Brand ===== */
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 20px;
        }
        .sidebar-brand .brand-icon {
            width: 44px;
            height: 44px;
            background: var(--accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            box-shadow: 0 0 20px var(--accent-glow);
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            line-height: 1.3;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 1px;
        }

        /* ===== Sidebar Nav ===== */
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .sidebar-nav .nav-item {
            margin: 0;
        }
        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--border-radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            transition: all var(--transition);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            font-size: 0.95rem;
        }
        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-link:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
        }
        .sidebar-nav .nav-link.active {
            color: #fff;
            background: var(--accent);
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .sidebar-nav .nav-link.active i {
            color: #fff;
        }
        .sidebar-nav .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Sidebar Footer ===== */
        .sidebar-footer {
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.8rem;
            text-align: center;
            letter-spacing: 0.5px;
        }

        /* ===== Mobile Menu Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            border: 1px solid var(--border-color);
            color: var(--text-light);
            width: 44px;
            height: 44px;
            border-radius: 12px;
            font-size: 1.3rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
        }
        .mobile-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Page Header / Banner ===== */
        .category-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary-light);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 26, 0.85) 0%, rgba(15, 15, 26, 0.5) 100%);
            pointer-events: none;
        }
        .category-banner .container-custom {
            position: relative;
            z-index: 1;
        }
        .category-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .category-banner p {
            font-size: 1.1rem;
            color: var(--text-main);
            max-width: 640px;
            margin-bottom: 0;
            line-height: 1.8;
        }
        .breadcrumb-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            padding: 0;
            list-style: none;
        }
        .breadcrumb-bar li+li::before {
            content: "›";
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--text-muted);
        }
        .breadcrumb-bar a:hover {
            color: var(--accent);
        }

        /* ===== Section ===== */
        .section-block {
            padding: 70px 0;
        }
        .section-block-alt {
            background: var(--primary);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .section-divider {
            width: 48px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin-bottom: 24px;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(233, 69, 96, 0.2);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .card-custom .card-body {
            padding: 24px;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-custom .card-text {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: 4px;
        }
        .card-custom .card-meta i {
            margin-right: 4px;
        }
        .card-custom .badge-tag {
            display: inline-block;
            background: rgba(233, 69, 96, 0.15);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
        }

        /* ===== Badge / Label ===== */
        .badge-custom {
            display: inline-block;
            background: rgba(233, 69, 96, 0.18);
            color: var(--accent);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            border: 1px solid rgba(233, 69, 96, 0.15);
        }

        /* ===== Buttons ===== */
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            box-shadow: 0 4px 20px var(--accent-glow);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px var(--accent-glow);
            color: #fff;
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .btn-outline-accent {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }
        .btn-outline-accent:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 20px var(--accent-glow);
        }

        /* ===== Tags Cloud ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tags-cloud .tag-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 0.85rem;
            color: var(--text-main);
            transition: all var(--transition);
            cursor: default;
        }
        .tags-cloud .tag-item:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .tags-cloud .tag-item i {
            margin-right: 6px;
            font-size: 0.75rem;
        }

        /* ===== Featured Article (Large) ===== */
        .featured-article {
            display: flex;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .featured-article:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .featured-article .fa-img {
            width: 45%;
            min-height: 320px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .featured-article .fa-body {
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-article .fa-body .fa-tag {
            display: inline-block;
            background: rgba(233, 69, 96, 0.15);
            color: var(--accent);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
            width: fit-content;
        }
        .featured-article .fa-body h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .featured-article .fa-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .featured-article .fa-body .fa-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== Stats / Numbers ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 32px 16px;
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            opacity: 0.7;
        }

        /* ===== Timeline ===== */
        .timeline-list {
            list-style: none;
            padding: 0;
            margin: 0;
            position: relative;
        }
        .timeline-list::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
        }
        .timeline-item {
            position: relative;
            padding-left: 56px;
            padding-bottom: 36px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item .tl-dot {
            position: absolute;
            left: 12px;
            top: 4px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid var(--bg-dark);
            box-shadow: 0 0 0 2px var(--accent);
        }
        .timeline-item .tl-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 4px;
            font-weight: 500;
        }
        .timeline-item .tl-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 6px;
        }
        .timeline-item .tl-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(233, 69, 96, 0.15);
        }
        .faq-item .faq-q {
            font-weight: 600;
            color: var(--text-light);
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-item .faq-q i {
            color: var(--accent);
            font-size: 1.1rem;
        }
        .faq-item .faq-a {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-top: 10px;
            padding-left: 32px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary-light);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 56px 48px;
            text-align: center;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 15, 26, 0.7);
            border-radius: var(--border-radius);
            pointer-events: none;
        }
        .cta-block>* {
            position: relative;
            z-index: 1;
        }
        .cta-block h3 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 1.05rem;
            color: var(--text-main);
            max-width: 520px;
            margin: 0 auto 28px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 360px;
            line-height: 1.7;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 32px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media(max-width:1024px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-article {
                flex-direction: column;
            }
            .featured-article .fa-img {
                width: 100%;
                height: 220px;
            }
            .category-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media(max-width:768px) {
            .app-sidebar {
                transform: translateX(-100%);
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.show {
                display: block;
            }
            .mobile-toggle {
                display: flex;
            }
            .app-main {
                margin-left: 0;
                padding-top: 60px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-banner {
                padding: 60px 0 40px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .category-banner p {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h3 {
                font-size: 1.5rem;
            }
            .featured-article .fa-body {
                padding: 24px;
            }
            .featured-article .fa-body h3 {
                font-size: 1.3rem;
            }
            .timeline-item {
                padding-left: 44px;
            }
            .timeline-list::before {
                left: 14px;
            }
            .timeline-item .tl-dot {
                left: 6px;
                width: 16px;
                height: 16px;
            }
            .faq-item {
                padding: 16px 18px;
            }
            .faq-item .faq-a {
                padding-left: 0;
            }
            .site-footer .footer-brand {
                font-size: 1.1rem;
            }
        }

        @media(max-width:520px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner h1 i {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-accent,
            .btn-outline-accent {
                padding: 10px 22px;
                font-size: 0.85rem;
            }
            .tags-cloud .tag-item {
                padding: 4px 14px;
                font-size: 0.78rem;
            }
            .card-custom .card-body {
                padding: 18px;
            }
            .card-custom .card-img-top {
                height: 160px;
            }
            .cta-block {
                padding: 32px 16px;
            }
            .cta-block h3 {
                font-size: 1.3rem;
            }
            .featured-article .fa-img {
                height: 180px;
            }
            .featured-article .fa-body {
                padding: 18px;
            }
            .featured-article .fa-body h3 {
                font-size: 1.15rem;
            }
            .timeline-item .tl-title {
                font-size: 0.95rem;
            }
        }

/* roulang page: category2 */
/* ============================================
               Design Variables & Reset
               ============================================ */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --accent: #e8a838;
            --accent-hover: #d4952f;
            --accent-glow: rgba(232, 168, 56, 0.25);
            --bg-body: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #202040;
            --bg-section-alt: #12121f;
            --text-light: #f0ece4;
            --text-body: #c8c4bc;
            --text-muted: #8a867e;
            --border-color: rgba(232, 168, 56, 0.15);
            --border-hover: rgba(232, 168, 56, 0.35);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(232, 168, 56, 0.06);
            --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(232, 168, 56, 0.15);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-light);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

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

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

        /* --- Sidebar --- */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.3);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .sidebar-brand .brand-icon {
            width: 44px;
            height: 44px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.3rem;
            box-shadow: 0 0 20px var(--accent-glow);
            flex-shrink: 0;
        }

        .sidebar-brand .brand-text {
            color: var(--text-light);
            font-weight: 700;
            font-size: 1.1rem;
            line-height: 1.2;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-weight: 400;
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .sidebar-nav {
            list-style: none;
            padding: 16px 12px;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav .nav-item {
            margin-bottom: 4px;
        }

        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            position: relative;
        }

        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: inherit;
            transition: color var(--transition);
        }

        .sidebar-nav .nav-link:hover {
            color: var(--text-light);
            background: rgba(232, 168, 56, 0.08);
        }

        .sidebar-nav .nav-link.active {
            color: var(--accent);
            background: rgba(232, 168, 56, 0.12);
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .sidebar-nav .nav-link.active i {
            color: var(--accent);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 0.78rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.02em;
        }

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

        /* ============================================
               Mobile Toggle Button (hidden on desktop)
               ============================================ */
        .sidebar-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1060;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            border: 1px solid var(--border-color);
            color: var(--text-light);
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
            transition: all var(--transition);
        }
        .sidebar-toggle:hover {
            background: var(--primary-light);
            border-color: var(--accent);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.65);
            z-index: 1045;
            backdrop-filter: blur(4px);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ============================================
               Hero / Banner
               ============================================ */
        .category-hero {
            position: relative;
            padding: 80px 0 70px;
            background: var(--primary-light);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            isolation: isolate;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 26, 0.88) 30%, rgba(15, 15, 26, 0.60) 70%, rgba(15, 15, 26, 0.40) 100%);
            z-index: 1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            z-index: 2;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 3;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 168, 56, 0.15);
            border: 1px solid var(--border-color);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--accent);
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .category-hero h1 span {
            color: var(--accent);
        }

        .category-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--text-body);
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .category-hero .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .category-hero .hero-stat-item {
            text-align: center;
        }

        .category-hero .hero-stat-item .num {
            display: block;
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .category-hero .hero-stat-item .label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* ============================================
               Section Shared
               ============================================ */
        .section-block {
            padding: 70px 0;
        }

        .section-block .section-header {
            margin-bottom: 44px;
        }

        .section-block .section-header .section-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            background: rgba(232, 168, 56, 0.10);
            padding: 4px 14px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
        }

        .section-block .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .section-block .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 560px;
        }

        .section-block.bg-alt {
            background: var(--bg-section-alt);
        }

        /* ============================================
               Cards
               ============================================ */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .card-custom .card-img-top {
            border-radius: var(--radius-sm);
            margin-bottom: 18px;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: var(--primary-light);
        }

        .card-custom .card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 168, 56, 0.12);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            border: 1px solid var(--border-color);
            align-self: flex-start;
        }

        .card-custom h3,
        .card-custom .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 8px;
            line-height: 1.35;
        }

        .card-custom .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
            line-height: 1.6;
        }

        .card-custom .card-footer-link {
            margin-top: 16px;
            color: var(--accent);
            font-weight: 500;
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .card-custom:hover .card-footer-link {
            gap: 10px;
        }

        /* ============================================
               Equipment / Product Cards
               ============================================ */
        .equip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px 24px 24px;
            text-align: center;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            box-shadow: var(--shadow-card);
        }
        .equip-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .equip-card .equip-icon {
            width: 60px;
            height: 60px;
            background: rgba(232, 168, 56, 0.10);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 14px;
            border: 1px solid var(--border-color);
        }

        .equip-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 6px;
        }

        .equip-card .equip-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .equip-card .equip-badge {
            font-size: 0.72rem;
            color: var(--accent);
            background: rgba(232, 168, 56, 0.10);
            padding: 2px 14px;
            border-radius: 50px;
            margin-top: 12px;
            border: 1px solid var(--border-color);
        }

        /* ============================================
               Tutorial List
               ============================================ */
        .tutorial-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .tutorial-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 20px 24px;
            transition: all var(--transition);
            cursor: default;
        }

        .tutorial-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }

        .tutorial-item .tutorial-num {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent);
            opacity: 0.6;
            line-height: 1;
            min-width: 40px;
            font-feature-settings: "tnum";
        }

        .tutorial-item .tutorial-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 4px;
        }

        .tutorial-item .tutorial-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        .tutorial-item .tutorial-body .tutorial-meta {
            display: flex;
            gap: 16px;
            margin-top: 8px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .tutorial-item .tutorial-body .tutorial-meta i {
            margin-right: 4px;
            color: var(--accent);
            opacity: 0.7;
        }

        /* ============================================
               Data / Stats Section
               ============================================ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }

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

        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            font-feature-settings: "tnum";
        }

        .stat-card .stat-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ============================================
               FAQ
               ============================================ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            color: var(--text-light);
            font-size: 0.96rem;
            cursor: pointer;
            transition: background var(--transition);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            gap: 12px;
        }

        .faq-question:hover {
            background: rgba(232, 168, 56, 0.05);
        }

        .faq-question .faq-toggle {
            font-size: 1rem;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ============================================
               CTA
               ============================================ */
        .cta-section {
            background: var(--primary-light);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0;
            position: relative;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 26, 0.90) 40%, rgba(15, 15, 26, 0.60) 100%);
            z-index: 1;
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-body);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .btn-custom {
            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);
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 4px 24px var(--accent-glow);
        }

        .btn-custom:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(232, 168, 56, 0.35);
            color: var(--primary);
        }

        .btn-custom-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.92rem;
            border: 1px solid var(--accent);
            background: transparent;
            color: var(--accent);
            cursor: pointer;
            transition: all var(--transition);
        }

        .btn-custom-outline:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 20px var(--accent-glow);
        }

        /* ============================================
               Footer
               ============================================ */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
            margin-top: auto;
        }

        .site-footer .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }

        .site-footer .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 360px;
            line-height: 1.7;
        }

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

        .site-footer .footer-links li {
            margin-bottom: 6px;
        }

        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 36px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

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

        @media (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }

            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 20px 0 60px rgba(0, 0, 0, 0.6);
            }

            .sidebar-toggle {
                display: flex;
            }

            .main-content {
                margin-left: 0;
            }

            .category-hero {
                padding: 60px 0 50px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
            .category-hero .hero-stats {
                gap: 20px;
            }
            .category-hero .hero-stat-item .num {
                font-size: 1.4rem;
            }

            .section-block {
                padding: 48px 0;
            }
            .section-block .section-header h2 {
                font-size: 1.5rem;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }

            .tutorial-item {
                flex-direction: column;
                gap: 10px;
                padding: 16px 18px;
            }
            .tutorial-item .tutorial-num {
                font-size: 1.2rem;
                min-width: auto;
            }

            .equip-card {
                padding: 20px 16px;
            }

            .container-custom {
                padding: 0 18px;
            }

            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }

            .site-footer .footer-brand {
                justify-content: center;
            }
            .site-footer .footer-desc {
                max-width: 100%;
                text-align: center;
            }
            .site-footer .d-flex {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .category-hero .hero-stat-item {
                text-align: left;
                display: flex;
                align-items: baseline;
                gap: 8px;
            }
            .category-hero .hero-stat-item .num {
                font-size: 1.2rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 18px 12px;
            }
            .stat-card .stat-number {
                font-size: 1.4rem;
            }

            .card-custom {
                padding: 18px;
            }

            .section-block .section-header h2 {
                font-size: 1.3rem;
            }

            .btn-custom {
                padding: 12px 28px;
                font-size: 0.88rem;
            }
            .btn-custom-outline {
                padding: 10px 22px;
                font-size: 0.85rem;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.84rem;
            }

            .container-custom {
                padding: 0 14px;
            }
        }

        /* ============================================
               Utility
               ============================================ */
        .text-accent {
            color: var(--accent) !important;
        }
        .text-muted {
            color: var(--text-muted) !important;
        }
        .bg-accent-soft {
            background: rgba(232, 168, 56, 0.08);
        }
        .border-accent {
            border-color: var(--accent) !important;
        }

        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }

        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }

        .text-center {
            text-align: center;
        }

        .d-flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .align-items-center {
            align-items: center;
        }
        .justify-content-center {
            justify-content: center;
        }
        .justify-content-between {
            justify-content: space-between;
        }

        .w-100 {
            width: 100%;
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }