/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b0e1a;
            --primary-light: #131725;
            --primary-mid: #1a1f33;
            --accent: #d4a84b;
            --accent-hover: #e4bb5c;
            --accent-dim: rgba(212, 168, 75, 0.15);
            --blue-accent: #3b5de7;
            --blue-hover: #4d6df5;
            --text: #f0f0f5;
            --text-secondary: #c8ccd8;
            --text-muted: #8a92a8;
            --border: #2a2e3e;
            --border-light: #383d50;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--primary);
            min-height: 100vh;
        }

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

        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: 4px;
            border-radius: 4px;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 28px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--accent), #f0d080);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--text);
            background: var(--accent-dim);
        }
        .nav-main a.active {
            color: var(--accent);
            background: var(--accent-dim);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0 12px;
            transition: border var(--transition), box-shadow var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-dim);
        }
        .search-box input {
            background: transparent;
            color: var(--text);
            padding: 8px 8px;
            width: 140px;
            font-size: 14px;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            color: var(--text-muted);
            font-size: 16px;
            padding: 6px 4px;
            transition: color var(--transition);
        }
        .search-box button:hover {
            color: var(--accent);
        }

        .btn-login {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 14px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .btn-login:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        .btn-primary {
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), #c89a3a);
            color: #0b0e1a;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(212, 168, 75, 0.25);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 75, 0.35);
            color: #0b0e1a;
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            border: 2px solid var(--accent);
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
            background: transparent;
            transition: all var(--transition);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: #0b0e1a;
            transform: translateY(-2px);
        }

        .btn-white {
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);
            color: var(--primary);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            font-size: 24px;
            color: var(--text);
            padding: 8px;
            background: none;
            border: none;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: calc(var(--header-h) + 40px) 0 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(11, 14, 26, 0.88) 0%,
                    rgba(11, 14, 26, 0.70) 40%,
                    rgba(11, 14, 26, 0.50) 70%,
                    rgba(11, 14, 26, 0.30) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--primary), transparent);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: var(--accent-dim);
            border: 1px solid rgba(212, 168, 75, 0.25);
            border-radius: 50px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 14px;
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), #f0d080);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .hero-actions .btn-primary {
            padding: 14px 36px;
            font-size: 16px;
        }
        .hero-actions .btn-outline {
            padding: 14px 36px;
            font-size: 16px;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .hero-stat h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
        }
        .hero-stat p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== Section General ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .accent-line {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 16px auto 0;
        }

        .section-dark {
            background: var(--primary-light);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: all var(--transition);
        }
        .feature-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== Category Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
            background: var(--primary-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
            aspect-ratio: 4 / 3;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .category-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card:hover img {
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 14, 26, 0.85) 0%, rgba(11, 14, 26, 0.20) 60%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px;
        }
        .category-card .overlay h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .category-card .overlay p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .category-card .overlay .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--accent);
            color: #0b0e1a;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            align-self: flex-start;
        }

        /* ===== Recommended / Content Cards ===== */
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .rec-card {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .rec-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--accent);
        }
        .rec-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .rec-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .rec-card:hover .thumb img {
            transform: scale(1.05);
        }
        .rec-card .info {
            padding: 20px 22px 24px;
        }
        .rec-card .info .badge {
            display: inline-block;
            padding: 2px 12px;
            background: var(--accent-dim);
            color: var(--accent);
            border-radius: 50px;
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 8px;
        }
        .rec-card .info h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .rec-card .info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .rec-card .info .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .rec-card .info .meta i {
            margin-right: 4px;
        }

        /* ===== CMS List ===== */
        .cms-list {
            display: grid;
            gap: 16px;
        }
        .cms-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 24px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .cms-item:hover {
            border-color: var(--accent);
            transform: translateX(4px);
        }
        .cms-item .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            opacity: 0.5;
            min-width: 40px;
            line-height: 1;
        }
        .cms-item .body {
            flex: 1;
        }
        .cms-item .body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .cms-item .body h3 a {
            color: var(--text);
            transition: color var(--transition);
        }
        .cms-item .body h3 a:hover {
            color: var(--accent);
        }
        .cms-item .body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .cms-item .body .meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 8px;
        }
        .cms-item .body .meta .cat {
            color: var(--accent);
            font-weight: 500;
        }
        .cms-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--primary-light);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .stat-card .icon {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .stat-card .number {
            font-size: 36px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            position: relative;
            transition: all var(--transition);
        }
        .process-step:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #0b0e1a;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
        }
        .process-step .arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--accent);
            opacity: 0.4;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border var(--transition);
        }
        .faq-item.active {
            border-color: var(--accent);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            cursor: pointer;
            transition: background var(--transition);
            width: 100%;
            text-align: left;
            background: transparent;
        }
        .faq-question:hover {
            background: var(--accent-dim);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--accent);
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 26, 0.85) 0%, rgba(11, 14, 26, 0.65) 100%);
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }
        .cta-content .btn-primary {
            padding: 14px 40px;
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-light);
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            color: var(--text-muted);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #0b0e1a;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            z-index: 999;
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 44px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rec-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step .arrow {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }

            .nav-main {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(11, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                pointer-events: none;
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                font-size: 16px;
            }
            .nav-main a.active::after {
                display: none;
            }

            .menu-toggle {
                display: block;
            }

            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-login {
                display: none;
            }

            .hero {
                padding: calc(var(--header-h) + 24px) 0 48px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 20px;
            }
            .hero-stat h3 {
                font-size: 22px;
            }

            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .rec-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .cms-item {
                flex-direction: column;
                gap: 10px;
                padding: 16px 18px;
            }
            .cms-item .num {
                font-size: 20px;
                min-width: auto;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-content h2 {
                font-size: 28px;
            }

            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                text-align: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .number {
                font-size: 28px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .rec-card .info {
                padding: 16px 18px 20px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-light: #f9c784;
            --bg-dark: #0f1923;
            --bg-mid: #1a2634;
            --bg-card: #1e2d3d;
            --bg-card-hover: #263548;
            --bg-light: #f8f9fa;
            --text-white: #f1f5f9;
            --text-light: #cbd5e1;
            --text-muted: #8899aa;
            --text-dark: #0f172a;
            --border-color: #2a3a4a;
            --border-light: #3a4a5a;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.3);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
            --shadow-glow: 0 0 30px rgba(230,57,70,0.15);
            --font-main: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-white); font-weight: 700; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 25, 35, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(42, 58, 74, 0.5);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            white-space: nowrap;
            transition: var(--transition);
        }
        .logo i { color: var(--primary); font-size: 26px; }
        .logo span { background: linear-gradient(135deg, var(--primary-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.85; transform: scale(0.98); }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a i { font-size: 14px; opacity: 0.7; }
        .nav-main a:hover { color: var(--text-white); background: rgba(230,57,70,0.12); }
        .nav-main a.active {
            color: var(--text-white);
            background: rgba(230,57,70,0.18);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: var(--primary);
            border-radius: 4px 4px 0 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.07);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 16px;
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); background: rgba(255,255,255,0.1); box-shadow: 0 0 0 3px rgba(230,57,70,0.15); }
        .search-box input {
            background: none;
            border: none;
            outline: none;
            color: var(--text-white);
            padding: 8px 0;
            width: 160px;
            font-size: 14px;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box button {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 6px 0 6px 10px;
            transition: var(--transition);
        }
        .search-box button:hover { color: var(--primary-light); }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(230,57,70,0.3);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.4); color: var(--text-white); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            border: 2px solid var(--border-light);
            background: transparent;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--text-white); background: rgba(230,57,70,0.08); }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 24px;
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15,25,35,0.85) 0%, rgba(15,25,35,0.4) 100%);
            z-index: 1;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-white), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary-light); }
        .breadcrumb span { color: var(--text-light); }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-title-left { text-align: left; margin-bottom: 8px; }
        .section-subtitle-left { text-align: left; margin-bottom: 40px; margin-left: 0; }

        /* ===== Category Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover { transform: translateY(-6px); border-color: var(--border-light); box-shadow: var(--shadow-md); background: var(--bg-card-hover); }
        .category-card:hover::before { opacity: 1; }
        .category-card .icon { font-size: 36px; color: var(--primary); margin-bottom: 16px; }
        .category-card h3 { font-size: 20px; margin-bottom: 10px; }
        .category-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
        .category-card .tag-count {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(230,57,70,0.12);
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 500;
        }

        /* ===== Guide Cards ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .guide-card:hover { transform: translateY(-6px); border-color: var(--border-light); box-shadow: var(--shadow-md); }
        .guide-card .card-img {
            height: 200px;
            background: var(--bg-mid);
            position: relative;
            overflow: hidden;
        }
        .guide-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .guide-card:hover .card-img img { transform: scale(1.05); }
        .guide-card .card-img .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: var(--text-white);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
        }
        .guide-card .card-body { padding: 22px 24px 24px; }
        .guide-card .card-body h3 { font-size: 19px; margin-bottom: 10px; }
        .guide-card .card-body h3 a { color: var(--text-white); }
        .guide-card .card-body h3 a:hover { color: var(--primary-light); }
        .guide-card .card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }
        .guide-card .card-meta .rating { color: var(--accent); }
        .guide-card .card-meta .rating i { margin-right: 2px; }

        /* ===== Featured Article ===== */
        .featured-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
        }
        .featured-wrap .featured-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 320px;
            background: var(--bg-mid);
        }
        .featured-wrap .featured-img img { width: 100%; height: 100%; object-fit: cover; }
        .featured-wrap .featured-content h2 { font-size: 28px; margin-bottom: 16px; }
        .featured-wrap .featured-content p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
        .featured-wrap .featured-content .tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
        .featured-wrap .featured-content .tags span {
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(69, 123, 157, 0.15);
            color: var(--secondary-light);
            font-size: 13px;
            font-weight: 500;
        }

        /* ===== Tips List ===== */
        .tips-list {
            display: grid;
            gap: 20px;
        }
        .tips-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tips-item:hover { border-color: var(--border-light); background: var(--bg-card-hover); }
        .tips-item .num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            color: var(--text-white);
        }
        .tips-item .content h4 { font-size: 17px; margin-bottom: 6px; }
        .tips-item .content p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

        /* ===== Comparison Table ===== */
        .compare-table-wrap {
            overflow-x: auto;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 560px;
        }
        .compare-table thead th {
            background: var(--bg-mid);
            color: var(--text-white);
            font-weight: 700;
            padding: 16px 20px;
            text-align: left;
            font-size: 15px;
            border-bottom: 2px solid var(--border-color);
        }
        .compare-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
            color: var(--text-light);
        }
        .compare-table tbody tr:hover { background: var(--bg-card-hover); }
        .compare-table tbody td:first-child { font-weight: 600; color: var(--text-white); }
        .compare-table .check { color: #2ecc71; }
        .compare-table .cross { color: var(--primary); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-white);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 14px; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary-light); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-mid), var(--bg-card));
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            border: 1px solid var(--border-color);
            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: 0.06;
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 34px; margin-bottom: 14px; }
        .cta-section p { font-size: 17px; color: var(--text-muted); max-width: 560px; margin: 0 auto 28px; }
        .cta-section .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-mid);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 20px; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.8; max-width: 360px; }
        .footer-col h4 { font-size: 16px; margin-bottom: 18px; color: var(--text-white); }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-3px); }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .page-banner h1 { font-size: 34px; }
            .featured-wrap { grid-template-columns: 1fr; padding: 28px; }
            .featured-wrap .featured-img { height: 240px; }
        }

        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .nav-main { display: none; }
            .mobile-toggle { display: block; }
            .header-actions .search-box { display: none; }
            .header-actions .btn-outline { display: none; }

            .nav-main.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15, 25, 35, 0.98);
                backdrop-filter: blur(16px);
                padding: 16px 20px 24px;
                border-bottom: 1px solid var(--border-color);
                gap: 4px;
                box-shadow: var(--shadow-lg);
            }
            .nav-main.open a { padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-main.open a.active::after { display: none; }
            .nav-main.open a.active { background: rgba(230,57,70,0.2); }

            .page-banner { padding: 100px 0 40px; min-height: 240px; }
            .page-banner h1 { font-size: 28px; }
            .page-banner p { font-size: 15px; }
            .section { padding: 56px 0; }
            .section-title { font-size: 26px; }
            .section-subtitle { font-size: 15px; margin-bottom: 32px; }
            .category-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .guide-grid { grid-template-columns: 1fr; gap: 20px; }
            .featured-wrap { padding: 20px; }
            .featured-wrap .featured-content h2 { font-size: 22px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section { padding: 40px 20px; }
            .cta-section h2 { font-size: 26px; }
            .compare-table-wrap { border-radius: var(--radius-sm); }
            .tips-item { padding: 16px 18px; }
            .tips-item .num { width: 34px; height: 34px; font-size: 15px; }
        }

        @media (max-width: 520px) {
            .category-grid { grid-template-columns: 1fr; }
            .guide-card .card-img { height: 170px; }
            .page-banner h1 { font-size: 24px; }
            .section-title { font-size: 22px; }
            .featured-wrap .featured-img { height: 190px; }
            .faq-question { font-size: 15px; padding: 14px 18px; }
            .faq-answer { font-size: 14px; }
            .btn-primary { padding: 8px 18px; font-size: 13px; }
            .btn-outline { padding: 7px 16px; font-size: 13px; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-glow: #e9c46a;
            --bg-body: #0b0c10;
            --bg-card: #1a1d23;
            --bg-section: #13161b;
            --bg-elevated: #22262e;
            --text-primary: #f1f3f5;
            --text-secondary: #c8ccd0;
            --text-muted: #8a8f96;
            --border-color: #2e333b;
            --border-light: #3a3f48;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::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-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }
        ::selection { background: var(--primary); color: #fff; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--header-h);
            background: rgba(11, 12, 16, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .logo i {
            font-size: 28px;
            color: var(--primary);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: linear-gradient(135deg, #f1f3f5, #c8ccd0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a i { margin-right: 6px; font-size: 14px; }
        .nav-main a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 20px rgba(230, 57, 70, 0.35);
        }
        .nav-main a.active:hover { background: var(--primary-dark); }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(230,57,70,0.15); }
        .search-box i { color: var(--text-muted); font-size: 15px; }
        .search-box input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            padding: 0 10px;
            width: 140px;
            font-size: 14px;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .btn-header {
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            background: var(--primary);
            color: #fff;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            box-shadow: 0 4px 16px rgba(230,57,70,0.3);
        }
        .btn-header:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(230,57,70,0.4); }
        .btn-header-outline {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            box-shadow: none;
        }
        .btn-header-outline:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(230,57,70,0.06); }

        /* Mobile Menu Toggle */
        .menu-toggle { display: none; background: none; color: var(--text-primary); font-size: 24px; cursor: pointer; padding: 4px; }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--bg-section);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--primary-light); }
        .breadcrumb .sep { color: var(--text-muted); font-size: 12px; }
        .breadcrumb .current { color: var(--text-primary); font-weight: 500; }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 48px 0 32px;
            background: var(--bg-section);
            border-bottom: 1px solid var(--border-color);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.07;
            pointer-events: none;
        }
        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(230,57,70,0.15);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .article-category i { font-size: 12px; }
        .article-hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            max-width: 900px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 14px;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 13px; color: var(--text-muted); }

        /* ===== Article Body ===== */
        .article-body-wrap {
            padding: 48px 0 64px;
            background: var(--bg-body);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .article-content .featured-img {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 32px;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .article-content .content-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-content .content-body p {
            margin-bottom: 20px;
        }
        .article-content .content-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-color);
        }
        .article-content .content-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 28px 0 12px;
        }
        .article-content .content-body ul, .article-content .content-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }
        .article-content .content-body li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230,57,70,0.06);
            padding: 16px 24px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content .content-body a { color: var(--primary-light); text-decoration: underline; }
        .article-content .content-body a:hover { color: var(--primary); }

        /* Article Tags */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 50px;
            background: var(--bg-elevated);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(230,57,70,0.06); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); font-size: 16px; }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            background: var(--bg-section);
            transition: var(--transition);
            color: var(--text-secondary);
        }
        .sidebar-list a:hover { background: var(--bg-elevated); color: var(--text-primary); }
        .sidebar-list a .thumb {
            width: 48px; height: 48px;
            border-radius: 6px;
            background: var(--bg-elevated);
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-list a .info { flex: 1; }
        .sidebar-list a .info .title { font-size: 14px; font-weight: 600; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .sidebar-list a .info .date { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(230,57,70,0.12), rgba(230,57,70,0.04));
            border: 1px solid rgba(230,57,70,0.2);
            text-align: center;
        }
        .sidebar-cta h3 { justify-content: center; }
        .sidebar-cta p { font-size: 14px; color: var(--text-muted); margin-bottom: 16px; }
        .sidebar-cta .btn-cta {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(230,57,70,0.3);
        }
        .sidebar-cta .btn-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(230,57,70,0.4); }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found i { font-size: 64px; color: var(--text-muted); margin-bottom: 24px; opacity: 0.5; }
        .not-found h2 { font-size: 28px; color: var(--text-primary); margin-bottom: 12px; }
        .not-found p { color: var(--text-muted); font-size: 16px; margin-bottom: 24px; }
        .not-found .btn-back {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .not-found .btn-back:hover { background: var(--primary-dark); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-section);
            padding: 48px 0;
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section h2 i { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-light); }
        .related-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .related-card .card-body {
            padding: 16px 20px 20px;
        }
        .related-card .card-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary-light); }
        .related-card .card-body p { font-size: 13px; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo { font-size: 20px; margin-bottom: 14px; }
        .footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; max-width: 360px; }
        .footer-col h4 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 40px; height: 40px;
            border-radius: 50%;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-muted);
            font-size: 18px;
            transition: var(--transition);
            padding: 0;
        }
        .footer-social a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-3px); }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-main { display: none; }
            .nav-main.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(11,12,16,0.98); backdrop-filter: blur(20px); padding: 16px 24px; border-bottom: 1px solid var(--border-color); gap: 4px; }
            .menu-toggle { display: block; }
            .nav-actions .search-box { display: none; }
            .article-hero h1 { font-size: 26px; }
            .article-content { padding: 24px 20px; }
            .article-content .content-body { font-size: 16px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .breadcrumb-wrap { display: none; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero { padding: 32px 0 24px; }
            .article-hero h1 { font-size: 22px; }
            .article-meta { gap: 12px; font-size: 13px; flex-wrap: wrap; }
            .article-content { padding: 16px; border-radius: var(--radius-md); }
            .article-content .content-body { font-size: 15px; }
            .article-content .content-body h2 { font-size: 20px; }
            .article-content .content-body h3 { font-size: 17px; }
            .sidebar-card { padding: 20px 16px; }
            .related-section h2 { font-size: 22px; }
            .nav-main.open { padding: 12px 16px; }
            .nav-main a { padding: 10px 14px; font-size: 14px; }
            .btn-header { padding: 6px 16px; font-size: 13px; }
        }