/* roulang page: index */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #8b5cf6;
            --accent: #a78bfa;
            --bg-dark: #0b0f1a;
            --bg-card: #1a1f2e;
            --bg-card-hover: #232a3e;
            --text-primary: #ffffff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 16px 48px rgba(99, 102, 241, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 3px;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .glass-nav {
            background: rgba(11, 15, 26, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .glass-nav.scrolled {
            background: rgba(11, 15, 26, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .nav-link {
            position: relative;
            padding: 6px 0;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--text-primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 1px;
            transition: var(--transition);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--text-primary);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(99, 102, 241, 0.45);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(99, 102, 241, 0.08);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            background: var(--bg-card-hover);
        }
        .card-img {
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            overflow: hidden;
            margin: -24px -24px 16px -24px;
        }
        .card-img img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: rgba(99, 102, 241, 0.15);
            color: var(--accent);
            border: 1px solid rgba(99, 102, 241, 0.2);
        }
        .badge-green {
            background: rgba(34, 197, 94, 0.15);
            color: #4ade80;
            border-color: rgba(34, 197, 94, 0.2);
        }
        .badge-amber {
            background: rgba(251, 191, 36, 0.15);
            color: #fbbf24;
            border-color: rgba(251, 191, 36, 0.2);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
        }
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding-top: 80px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 15, 26, 0.88) 0%, rgba(11, 15, 26, 0.60) 50%, rgba(99, 102, 241, 0.20) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 800px;
            padding: 40px 24px;
        }
        .hero-content h1 {
            font-size: 4rem;
            font-weight: 800;
            letter-spacing: -1.5px;
            line-height: 1.1;
            background: linear-gradient(135deg, #ffffff 30%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-top: 20px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-top: 32px;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 20px 12px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .category-card .card-bg {
            height: 180px;
            overflow: hidden;
        }
        .category-card .card-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-bg img {
            transform: scale(1.08);
        }
        .category-card .card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 15, 26, 0.92) 0%, rgba(11, 15, 26, 0.30) 70%);
            pointer-events: none;
        }
        .category-card .card-body {
            position: relative;
            z-index: 1;
            padding: 20px 24px 24px;
        }
        .category-card .card-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
        }
        .category-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        .content-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .content-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .content-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .content-item .item-index {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.12);
            color: var(--accent);
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .content-item .item-info {
            flex: 1;
            min-width: 0;
        }
        .content-item .item-info h4 {
            font-size: 1rem;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .content-item .item-info .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .content-item .item-tag {
            flex-shrink: 0;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            padding: 28px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .feature-card .icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(99, 102, 241, 0.12);
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }
        .feature-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
            line-height: 1.6;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-color);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 4px 0;
            user-select: none;
            gap: 16px;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 12px;
        }
        .cta-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.08));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 12px auto 28px;
        }
        .footer {
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, #fff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 12px;
            max-width: 300px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 4px 0;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px;
        }
        .mobile-menu {
            display: none;
            background: rgba(11, 15, 26, 0.96);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
        }
        .mobile-menu a {
            display: block;
            padding: 10px 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        .mobile-menu a.active {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .nav-links {
                display: none !important;
            }
            .nav-actions .btn-outline {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero-content h1 {
                font-size: 2.6rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .content-item {
                flex-wrap: wrap;
            }
            .content-item .item-tag {
                width: 100%;
                margin-top: 8px;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
        }
        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

/* roulang page: category1 */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #818cf8;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --surface: #0f0f1a;
            --surface-light: #1a1a2e;
            --surface-card: #1e1e35;
            --text-main: #f1f1f6;
            --text-muted: #9490b8;
            --border-glass: rgba(255, 255, 255, 0.06);
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::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: 'Inter', 'PingFang SC', system-ui, -apple-system, sans-serif;
            background: var(--surface);
            color: var(--text-main);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* Glass Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0.75rem 0;
            background: rgba(15, 15, 26, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            transition: all var(--transition);
        }

        .header.scrolled {
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-glass);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.4rem 0;
            position: relative;
            transition: color var(--transition);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-light);
            border-radius: 2px;
            transition: width var(--transition);
        }

        .nav-link:hover {
            color: var(--text-main);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--text-main);
        }

        .nav-link.active::after {
            width: 100%;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 0.5rem 1.25rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.45);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            width: 26px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15, 15, 26, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 2rem 1.5rem;
                gap: 1.25rem;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border-glass);
                pointer-events: none;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .nav-cta-mobile {
                display: inline-block;
                margin-top: 0.5rem;
            }
        }

        @media (min-width: 769px) {
            .nav-cta-mobile {
                display: none;
            }
        }

        /* Hero Banner (inner page) */
        .page-hero {
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(245, 158, 11, 0.05)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 15, 26, 0.7) 0%, rgba(15, 15, 26, 0.4) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary-light);
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.2);
        }

        .breadcrumb .current {
            color: var(--primary-light);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 6rem 0 3rem;
                min-height: 240px;
            }
            .page-hero h1 {
                font-size: 1.75rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
        }

        /* Section common */
        .section {
            padding: 5rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary-light);
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1rem;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
        }

        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 2.5rem;
        }

        .card {
            background: var(--surface-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }

        .card:hover {
            transform: translateY(-6px);
            border-color: rgba(99, 102, 241, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 40px rgba(99, 102, 241, 0.05);
        }

        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--surface-light);
        }

        .card-body {
            padding: 1.5rem;
        }

        .card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            background: rgba(99, 102, 241, 0.15);
            color: var(--primary-light);
            margin-bottom: 0.75rem;
            letter-spacing: 0.03em;
        }

        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

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

        .card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .card-meta i {
            margin-right: 0.3rem;
            opacity: 0.6;
        }

        /* Badge / Tag */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.9rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
            border: 1px solid var(--border-glass);
            transition: all var(--transition);
        }

        .badge:hover {
            background: rgba(99, 102, 241, 0.12);
            color: var(--primary-light);
            border-color: rgba(99, 102, 241, 0.2);
        }

        .badge-primary {
            background: rgba(99, 102, 241, 0.15);
            color: var(--primary-light);
            border-color: transparent;
        }

        .badge-accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
            border-color: transparent;
        }

        /* Step / Timeline */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            margin-top: 2.5rem;
        }

        .step-item {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--surface-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glass);
            transition: all var(--transition);
            position: relative;
        }

        .step-item:hover {
            border-color: rgba(99, 102, 241, 0.2);
            transform: translateY(-4px);
        }

        .step-number {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 1.25rem;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
        }

        .step-title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .step-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            margin-top: 2rem;
            max-width: 800px;
        }

        .faq-item {
            background: var(--surface-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-glass);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(99, 102, 241, 0.15);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.5rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            background: none;
            border: none;
            cursor: pointer;
            transition: background var(--transition);
            text-align: left;
            gap: 1rem;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-question .icon {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(180deg);
            color: var(--primary-light);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 1.5rem 1.25rem;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(245, 158, 11, 0.05));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-xl);
            padding: 3.5rem 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.04), transparent 70%);
            pointer-events: none;
        }

        .cta-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            position: relative;
        }

        .cta-desc {
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 2rem;
            font-size: 1rem;
            line-height: 1.7;
            position: relative;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 0.85rem 2.2rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.25);
            position: relative;
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(99, 102, 241, 0.4);
        }

        .cta-btn i {
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 2.5rem 1.5rem;
            }
            .cta-title {
                font-size: 1.35rem;
            }
        }

        /* Footer */
        .footer {
            background: var(--surface-light);
            border-top: 1px solid var(--border-glass);
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand .logo {
            font-size: 1.25rem;
            margin-bottom: 1rem;
            display: inline-block;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--text-main);
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 0.3rem 0;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Responsive card grid */
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
        }

        /* List style */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .content-list-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 1.25rem;
            background: var(--surface-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-glass);
            transition: all var(--transition);
        }

        .content-list-item:hover {
            border-color: rgba(99, 102, 241, 0.15);
            transform: translateX(4px);
        }

        .content-list-item .num {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--primary-light);
            min-width: 32px;
            opacity: 0.7;
        }

        .content-list-item .info {
            flex: 1;
        }

        .content-list-item .info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }

        .content-list-item .info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Glass decoration */
        .glass-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glass), transparent);
            margin: 0 auto;
            max-width: 80%;
        }

        /* Animations */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --primary-bg: rgba(99, 102, 241, 0.08);
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-dark: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #1e1e36;
            --bg-elevated: #22223a;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(99, 102, 241, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 48px rgba(99, 102, 241, 0.15);
            --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;
        }

        *,
        *::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);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
        }

        /* ===== Glass Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            background: rgba(15, 15, 26, 0.72);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .header.scrolled {
            background: rgba(15, 15, 26, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
            border-bottom-color: var(--border-color);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.2px;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--text-primary);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--text-primary);
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--accent);
        }

        .nav-cta {
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.4);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
                pointer-events: none;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-link {
                font-size: 17px;
                padding: 10px 0;
                width: 100%;
                text-align: center;
            }

            .nav-cta {
                margin-top: 8px;
                width: 100%;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 18px;
            }
            .nav-cta {
                padding: 8px 18px;
                font-size: 13px;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 60px;
            background: linear-gradient(160deg, #0f0f1a 0%, #1a1a2e 40%, #0f0f1a 100%);
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero .container {
            position: relative;
            z-index: 1;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .article-breadcrumb a:hover {
            color: var(--primary-light);
        }

        .article-breadcrumb .sep {
            color: var(--text-muted);
            opacity: 0.5;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--primary-bg);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .article-title {
            font-size: clamp(28px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            max-width: 900px;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 14px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            font-size: 13px;
            color: var(--primary);
        }

        /* ===== Article Body ===== */
        .article-section {
            padding: 60px 0 80px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 40px;
            box-shadow: var(--shadow-card);
        }

        .article-content {
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--primary);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-sm);
            margin: 28px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content .content-image-caption {
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: -16px;
            margin-bottom: 28px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }

        .article-tag {
            padding: 6px 16px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-light);
            border-radius: 50px;
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .article-tag:hover {
            background: var(--primary-bg);
            border-color: var(--border-color);
            color: var(--primary-light);
        }

        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
        }

        .article-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 22px;
            background: var(--bg-elevated);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            max-width: 380px;
        }

        .article-nav a:hover {
            background: var(--primary-bg);
            border-color: var(--border-color);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        .article-nav a i {
            font-size: 16px;
            color: var(--primary);
        }

        .article-nav .nav-next {
            text-align: right;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h4 i {
            color: var(--accent);
        }

        .sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .sidebar-list li {
            border-bottom: 1px solid var(--border-light);
        }

        .sidebar-list li:last-child {
            border-bottom: none;
        }

        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 0;
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
        }

        .sidebar-list a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }

        .sidebar-list a .num {
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            border-radius: 50%;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary-light);
            flex-shrink: 0;
        }

        .sidebar-list a .num.top {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
        }

        .sidebar-cta {
            background: linear-gradient(145deg, var(--bg-card), var(--bg-elevated));
            border: 1px solid var(--border-color);
            text-align: center;
            padding: 32px 24px;
        }

        .sidebar-cta h4 {
            color: var(--text-primary);
            font-size: 20px;
            margin-bottom: 8px;
            justify-content: center;
        }

        .sidebar-cta p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .sidebar-cta .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
        }

        .sidebar-cta .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.4);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--border-light);
        }

        .related-section .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .related-section .section-sub {
            color: var(--text-muted);
            margin-bottom: 36px;
            font-size: 15px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-color);
        }

        .related-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .related-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: rgba(15, 15, 26, 0.8);
            backdrop-filter: blur(8px);
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .related-card .card-body {
            padding: 20px 22px 24px;
        }

        .related-card .card-body h5 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .related-card .card-body .meta i {
            font-size: 11px;
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .footer {
            background: #0a0a14;
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 24px;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 14px;
            padding: 6px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 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:hover {
            color: var(--primary-light);
        }

        @media (max-width: 968px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 110px 0 40px;
            }

            .article-main {
                padding: 24px 20px;
            }

            .article-content {
                font-size: 15px;
            }

            .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;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 24px;
            }
            .article-meta {
                gap: 12px;
                font-size: 13px;
            }
            .article-main {
                padding: 16px;
            }
            .article-nav {
                flex-direction: column;
            }
            .article-nav a {
                max-width: 100%;
            }
            .nav-cta {
                display: none;
            }
        }

        /* ===== Not Found State ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }

        .not-found-box i {
            font-size: 56px;
            color: var(--primary);
            margin-bottom: 20px;
            opacity: 0.6;
        }

        .not-found-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .not-found-box .back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
        }

        .not-found-box .back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.4);
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C3BF5;
            --primary-light: #8B5CF6;
            --primary-dark: #4F2BC2;
            --primary-glow: rgba(108, 59, 245, 0.35);
            --accent: #F59E0B;
            --accent-light: #FBBF24;
            --bg-dark: #0B0D17;
            --bg-card: #12142A;
            --bg-card-hover: #1A1D3A;
            --bg-section: #0F1123;
            --text-main: #F1F5F9;
            --text-muted: #94A3B8;
            --text-dim: #64748B;
            --border-color: rgba(108, 59, 245, 0.18);
            --border-glow: rgba(108, 59, 245, 0.25);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(108, 59, 245, 0.06);
            --shadow-card-hover: 0 16px 48px rgba(108, 59, 245, 0.20), 0 0 0 1px rgba(108, 59, 245, 0.12);
            --shadow-glow: 0 0 60px rgba(108, 59, 245, 0.10);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

        /* ===== 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);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }

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

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

        button {
            cursor: pointer;
        }

        ::selection {
            background: var(--primary);
            color: #fff;
        }

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

        /* ===== Glass Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(11, 13, 23, 0.55);
            backdrop-filter: blur(28px) saturate(1.3);
            -webkit-backdrop-filter: blur(28px) saturate(1.3);
            border-bottom: 1px solid rgba(108, 59, 245, 0.10);
            transition: var(--transition);
        }

        .header.scrolled {
            background: rgba(11, 13, 23, 0.88);
            backdrop-filter: blur(32px) saturate(1.5);
            border-bottom-color: rgba(108, 59, 245, 0.18);
            box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(135deg, #A78BFA, #6C3BF5, #F59E0B);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 6px 4px;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.2px;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--text-main);
        }
        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            width: 100%;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            box-shadow: 0 0 12px var(--primary-glow);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108, 59, 245, 0.30);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px rgba(108, 59, 245, 0.45);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            width: 26px;
            height: 2px;
            background: var(--text-main);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 140px 0 80px;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, #0B0D17 0%, #1A0D2E 40%, #0F1123 100%);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: screen;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 59, 245, 0.25) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 30%, rgba(245, 158, 11, 0.10) 0%, transparent 50%);
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .banner-breadcrumb a {
            color: var(--text-muted);
        }
        .banner-breadcrumb a:hover {
            color: var(--primary-light);
        }
        .banner-breadcrumb .sep {
            color: var(--text-dim);
            font-size: 12px;
        }
        .banner-breadcrumb .current {
            color: var(--text-main);
        }

        .banner-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff 30%, #A78BFA 70%, #F59E0B 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
            max-width: 700px;
        }

        .banner-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.8;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-light);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            background: rgba(108, 59, 245, 0.10);
            padding: 6px 16px;
            border-radius: 50px;
            border: 1px solid rgba(108, 59, 245, 0.12);
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #fff;
        }

        .section-title .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
        }

        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

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

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

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

        .card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(108, 59, 245, 0.12);
            color: var(--primary-light);
            font-size: 22px;
            margin-bottom: 18px;
            transition: var(--transition);
        }

        .card:hover .card-icon {
            background: rgba(108, 59, 245, 0.22);
            transform: scale(1.05);
        }

        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .card .badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(108, 59, 245, 0.12);
            color: var(--primary-light);
            border: 1px solid rgba(108, 59, 245, 0.10);
            margin-top: 12px;
        }

        .card .badge.accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
            border-color: rgba(245, 158, 11, 0.10);
        }

        /* ===== Step / Flow ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }

        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .step-number {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 20px rgba(108, 59, 245, 0.30);
        }

        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Tutorial List ===== */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .tutorial-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }

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

        .tutorial-item .num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(108, 59, 245, 0.10);
            color: var(--primary-light);
            font-weight: 700;
            font-size: 16px;
        }

        .tutorial-item .content h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .tutorial-item .content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .tutorial-item .tag {
            font-size: 11px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 50px;
            background: rgba(245, 158, 11, 0.10);
            color: var(--accent);
            border: 1px solid rgba(245, 158, 11, 0.08);
            margin-top: 6px;
            display: inline-block;
        }

        /* ===== 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-glow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--primary-light);
        }

        .faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(108, 59, 245, 0.08);
            color: var(--primary-light);
            transition: var(--transition);
            font-size: 14px;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
            background: rgba(108, 59, 245, 0.18);
        }

        .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: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, #1A0D2E, #0B0D17 60%);
            border-top: 1px solid rgba(108, 59, 245, 0.08);
            border-bottom: 1px solid rgba(108, 59, 245, 0.08);
            text-align: center;
        }

        .cta-section .cta-box {
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: 0 6px 30px rgba(108, 59, 245, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 48px rgba(108, 59, 245, 0.50);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: transparent;
            color: var(--text-main);
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.10);
        }

        .btn-secondary:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            transform: translateY(-2px);
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .footer {
            background: #080A14;
            border-top: 1px solid rgba(108, 59, 245, 0.06);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 24px;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            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-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 13px;
            color: var(--text-dim);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: var(--text-dim);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .banner-title {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(11, 13, 23, 0.96);
                backdrop-filter: blur(32px);
                padding: 24px 28px;
                gap: 16px;
                border-bottom: 1px solid rgba(108, 59, 245, 0.10);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            }

            .nav-links.open {
                display: flex;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .header .container .nav-cta-mobile {
                display: inline-flex;
                padding: 8px 18px;
                font-size: 13px;
            }

            .page-banner {
                padding: 120px 0 60px;
                min-height: 260px;
            }

            .banner-title {
                font-size: 30px;
            }

            .banner-desc {
                font-size: 16px;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 28px;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }

            .tutorial-grid {
                grid-template-columns: 1fr;
            }

            .step-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

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

            .btn-primary,
            .btn-secondary {
                padding: 14px 28px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .banner-title {
                font-size: 26px;
            }

            .section-title {
                font-size: 24px;
            }

            .step-grid {
                grid-template-columns: 1fr;
            }

            .card {
                padding: 20px;
            }

            .logo {
                font-size: 18px;
            }

            .page-banner {
                padding: 100px 0 48px;
                min-height: 220px;
            }
        }

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

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6366f1;
            --primary-hover: #4f46e5;
            --primary-light: rgba(99, 102, 241, 0.15);
            --primary-glow: rgba(99, 102, 241, 0.3);
            --accent: #06b6d4;
            --accent-hover: #0891b2;
            --bg-dark: #08080e;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-glass: rgba(8, 8, 14, 0.72);
            --bg-glass-scrolled: rgba(8, 8, 14, 0.96);
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-light: rgba(255, 255, 255, 0.06);
            --border-hover: rgba(255, 255, 255, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
        }

        /* ===== 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);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }

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

        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;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Glass Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: var(--bg-glass-scrolled);
            box-shadow: 0 4px 40px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            background: linear-gradient(135deg, #f1f5f9, #a5b4fc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--text-primary);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--text-primary);
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
        }

        .nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: var(--transition);
            letter-spacing: 0.02em;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: 0 0 30px var(--primary-glow);
            transform: translateY(-1px);
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            z-index: 0;
            filter: brightness(0.35) saturate(0.9);
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 8, 14, 0.4) 0%, rgba(8, 8, 14, 0.85) 70%, var(--bg-dark) 100%);
            z-index: 1;
        }

        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: #a5b4fc;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(99, 102, 241, 0.2);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero h1 {
            font-size: clamp(2.4rem, 6vw, 4.2rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #f1f5f9 30%, #a5b4fc 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 20px;
        }

        .hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 30px rgba(99, 102, 241, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 50px var(--primary-glow);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--border-hover);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }

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

        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .hero-stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 90px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: #a5b4fc;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            border: 1px solid rgba(99, 102, 241, 0.15);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }

        .text-center .section-sub {
            margin: 0 auto;
        }

        /* ===== Service Cards ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

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

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #a5b4fc;
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .service-card:hover .service-icon {
            background: rgba(99, 102, 241, 0.25);
            transform: scale(1.05);
        }

        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .service-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }

        .category-card:hover {
            transform: translateY(-5px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-card);
        }

        .category-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }

        .category-card:hover .card-img {
            transform: scale(1.04);
        }

        .category-card .card-body {
            padding: 20px 20px 24px;
        }

        .category-card .tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 500;
            color: #a5b4fc;
            background: var(--primary-light);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            border: 1px solid rgba(99, 102, 241, 0.1);
        }

        .category-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .category-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Tools Section ===== */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .tool-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            transition: var(--transition);
        }

        .tool-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .tool-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(6, 182, 212, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #22d3ee;
        }

        .tool-item .info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .tool-item .info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .tool-item .info .tool-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 500;
            margin-top: 8px;
            transition: var(--transition);
        }

        .tool-item .info .tool-link:hover {
            color: #a5b4fc;
            gap: 10px;
        }

        /* ===== Data Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
        }

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

        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 700;
            background: linear-gradient(135deg, #f1f5f9, #a5b4fc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 48px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-size: 0.98rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
            user-select: none;
        }

        .faq-question:hover {
            color: #a5b4fc;
        }

        .faq-question .icon {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(6, 182, 212, 0.06) 100%);
            border: 1px solid rgba(99, 102, 241, 0.1);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(99, 102, 241, 0.04) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
        }

        .cta-section .btn-primary {
            position: relative;
        }

        /* ===== Related Content ===== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .related-card .rc-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: var(--transition);
        }

        .related-card:hover .rc-img {
            transform: scale(1.04);
        }

        .related-card .rc-body {
            padding: 20px 20px 24px;
        }

        .related-card .rc-tag {
            font-size: 0.72rem;
            font-weight: 500;
            color: #22d3ee;
            background: rgba(6, 182, 212, 0.1);
            padding: 2px 12px;
            border-radius: 50px;
            display: inline-block;
            margin-bottom: 8px;
        }

        .related-card h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .related-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .related-card .rc-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 12px;
            display: flex;
            gap: 16px;
        }

        /* ===== Footer ===== */
        .footer {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-light);
        }

        .footer-brand .logo {
            font-size: 1.2rem;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--text-primary);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }

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

        .footer-bottom a:hover {
            color: var(--text-primary);
        }

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

            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-glass-scrolled);
                backdrop-filter: blur(24px);
                flex-direction: column;
                gap: 0;
                padding: 12px 24px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links .nav-link {
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--border-light);
            }

            .nav-links .nav-link:last-child {
                border-bottom: none;
            }

            .nav-links .nav-cta {
                margin-top: 12px;
                text-align: center;
                width: 100%;
            }

            .mobile-toggle {
                display: flex;
            }

            .hero {
                min-height: 70vh;
                padding: 100px 20px 60px;
            }

            .hero h1 {
                font-size: clamp(1.8rem, 8vw, 2.6rem);
            }

            .hero p {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 24px;
            }

            .hero-stat-item .num {
                font-size: 1.5rem;
            }

            .section {
                padding: 60px 0;
            }

            .service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .category-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .tools-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

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

            .stat-card .num {
                font-size: 1.8rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 40px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 16px;
            }

            .logo {
                font-size: 1.1rem;
            }

            .hero {
                padding: 80px 16px 40px;
                min-height: 60vh;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .service-card {
                padding: 24px 20px;
            }

            .category-card .card-img {
                height: 140px;
            }

            .tool-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px;
            }

            .faq-question {
                padding: 14px 18px;
                font-size: 0.9rem;
            }

            .cta-section {
                padding: 32px 18px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.7s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }