/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #7c3aed;
            --accent: #f59e0b;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --text: #0f172a;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: all 0.25s ease;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input:focus,
        textarea:focus,
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1.1rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }

        .nav-links li a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-links li a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

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

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 16px;
            height: 40px;
            width: 200px;
            transition: var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .search-box input {
            background: transparent;
            border: none;
            padding: 0 8px;
            flex: 1;
            font-size: 0.9rem;
            color: var(--text);
            min-width: 0;
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.30);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.40);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
        }

        .mobile-toggle {
            display: none;
            background: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }

        .mobile-toggle:hover {
            background: var(--bg-alt);
        }

        /* Mobile nav */
        .mobile-nav {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 12px 16px 20px;
            background: var(--bg);
            border-top: 1px solid var(--border);
        }

        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-muted);
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
        }

        .mobile-nav .mobile-search {
            margin-top: 8px;
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 16px;
            height: 44px;
        }

        .mobile-nav .mobile-search input {
            background: transparent;
            border: none;
            padding: 0 8px;
            flex: 1;
            font-size: 0.95rem;
            color: var(--text);
        }

        .mobile-nav .mobile-search input::placeholder {
            color: var(--text-light);
        }

        .mobile-nav .mobile-search i {
            color: var(--text-light);
        }

        @media (max-width: 900px) {
            .nav-links,
            .nav-right .search-box,
            .nav-right .btn-primary {
                display: none;
            }

            .mobile-toggle {
                display: block;
            }

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

            .header-inner {
                height: 64px;
            }
        }

        @media (min-width: 901px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            padding: 80px 0 60px;
            background: linear-gradient(160deg, #eff6ff 0%, #f5f3ff 50%, #fefce8 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            color: var(--text);
            margin: 0 0 16px;
        }

        .hero-content h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 0 32px;
            line-height: 1.7;
        }

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

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .hero-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 32px 28px;
            width: 100%;
            max-width: 420px;
            border: 1px solid rgba(226, 232, 240, 0.5);
        }

        .hero-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .hero-card-item {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            padding: 18px 16px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .hero-card-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .hero-card-item i {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .hero-card-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 4px;
        }

        .hero-card-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        @media (max-width: 1024px) {
            .hero-content h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: 48px 0 40px;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

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

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

        /* ===== Sections ===== */
        .section {
            padding: 72px 0;
        }

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

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

        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
            letter-spacing: -0.3px;
        }

        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .section-title h2 {
                font-size: 1.6rem;
            }
        }

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

        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 0 0 10px;
        }

        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

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

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .category-card .cat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .category-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 0 0 8px;
        }

        .category-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0 0 16px;
            line-height: 1.6;
        }

        .category-card .cat-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-card .cat-link i {
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .category-card .cat-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Latest Posts ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .post-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .post-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-category {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0 0 8px;
            line-height: 1.4;
            flex: 1;
        }

        .post-card h3 a {
            color: var(--text);
        }

        .post-card h3 a:hover {
            color: var(--primary);
        }

        .post-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0 0 12px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: auto;
        }

        .post-meta i {
            margin-right: 4px;
        }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        .empty-posts i {
            font-size: 2rem;
            margin-bottom: 12px;
            opacity: 0.4;
        }

        @media (max-width: 768px) {
            .posts-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: var(--transition);
        }

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

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 14px;
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0 0 8px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 480px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            gap: 12px;
            user-select: none;
        }

        .faq-question i {
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 72px 0;
            text-align: center;
            color: #fff;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 0 0 12px;
        }

        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }

        .cta-section .btn-white:hover {
            background: #f1f5f9;
        }

        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            margin: 0 0 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: #60a5fa;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom a:hover {
            color: #60a5fa;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

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

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Utilities ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }

        .badge i {
            font-size: 0.7rem;
        }

        .gap-section {
            margin-top: 0;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeInUp 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: #4F46E5;
            --primary-light: #6366F1;
            --primary-dark: #3730A3;
            --accent: #06B6D4;
            --accent-light: #22D3EE;
            --bg: #F8FAFC;
            --bg-card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(79,70,229,0.08);
            --shadow-hover: 0 12px 40px rgba(79,70,229,0.14);
            --shadow-card: 0 2px 16px rgba(0,0,0,0.04);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid rgba(226,232,240,0.6);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0;
            height: 72px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .logo:hover { color: var(--primary); }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 4px;
            margin: 0 24px;
        }
        .nav-links li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background: rgba(79,70,229,0.06);
        }
        .nav-links li a.active {
            color: var(--primary);
            background: rgba(79,70,229,0.1);
            font-weight: 600;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 16px;
            height: 40px;
            gap: 8px;
            transition: var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
            background: #fff;
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.88rem;
            color: var(--text);
            width: 100%;
        }
        .search-box input::placeholder { color: var(--text-light); }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-size: 0.92rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 4px 14px rgba(79,70,229,0.3);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(79,70,229,0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--border);
            color: var(--text-secondary);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(79,70,229,0.04);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            flex-direction: column;
            gap: 8px;
            z-index: 99;
            max-height: calc(100vh - 72px);
            overflow-y: auto;
        }
        .mobile-nav.open { display: flex; }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active { background: rgba(79,70,229,0.08); color: var(--primary); }
        .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 16px;
            height: 44px;
            gap: 10px;
            margin-top: 4px;
        }
        .mobile-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.95rem;
            width: 100%;
            color: var(--text);
        }
        @media (max-width: 1024px) {
            .nav-links { gap: 2px; }
            .nav-links li a { padding: 8px 12px; font-size: 0.85rem; }
            .search-box { min-width: 140px; }
        }
        @media (max-width: 820px) {
            .nav-links, .nav-right .search-box, .nav-right .btn-primary { display: none; }
            .mobile-toggle { display: flex; }
            .site-header { height: 64px; }
            .logo { font-size: 1.2rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 0.95rem; }
        }

        /* ===== Article Page ===== */
        .article-wrapper {
            max-width: 820px;
            margin: 0 auto;
            padding: 48px 0 80px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-light);
            font-weight: 500;
        }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); }
        .article-header {
            margin-bottom: 32px;
        }
        .article-category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79,70,229,0.08);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .article-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--text-light);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta i { margin-right: 6px; }
        .article-meta span { display: flex; align-items: center; }
        .article-image {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: var(--shadow);
            background: var(--border);
            aspect-ratio: 16/9;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 3rem;
        }
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-body {
            font-size: 1.08rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            letter-spacing: -0.01em;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body blockquote {
            border-left: 4px solid var(--primary-light);
            background: rgba(79,70,229,0.04);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow-card);
        }
        .article-body pre {
            background: #1E293B;
            color: #E2E8F0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 24px 0;
            line-height: 1.6;
        }
        .article-body code {
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            font-size: 0.9em;
            background: rgba(79,70,229,0.06);
            padding: 2px 8px;
            border-radius: 4px;
            color: var(--primary-dark);
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }
        .article-body hr {
            border: none;
            height: 1px;
            background: var(--border);
            margin: 36px 0;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(79,70,229,0.04);
        }
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.88rem;
            color: var(--text-light);
            max-width: 45%;
        }
        .article-nav a span:first-child {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .article-nav a span:last-child {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
        }
        .article-nav a:hover span:last-child { color: var(--primary); }
        .article-nav .next { text-align: right; align-items: flex-end; }

        /* ===== Related / CTA ===== */
        .related-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 60px 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .related-card .cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }
        .related-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .meta {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 12px;
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius);
            padding: 48px 56px;
            text-align: center;
            color: #fff;
            margin: 48px 0 0;
            box-shadow: 0 12px 40px rgba(79,70,229,0.25);
        }
        .cta-banner h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-banner p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 24px;
        }
        .cta-banner .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            font-size: 1.05rem;
            padding: 14px 36px;
        }
        .cta-banner .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.2);
            background: #f8fafc;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 360px;
            margin-top: 8px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #94A3B8;
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #64748B;
        }
        .footer-bottom a {
            color: #94A3B8;
        }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: span 2; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-brand { grid-column: span 1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Article Responsive ===== */
        @media (max-width: 768px) {
            .article-title { font-size: 1.7rem; }
            .article-body { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-banner { padding: 32px 24px; }
            .cta-banner h2 { font-size: 1.5rem; }
            .article-nav { flex-direction: column; gap: 16px; }
            .article-nav a { max-width: 100%; }
            .article-nav .next { text-align: left; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .article-title { font-size: 1.4rem; }
            .article-wrapper { padding: 24px 0 48px; }
            .breadcrumb { font-size: 0.8rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

/* roulang page: category1 */
:root {
            --primary-500: #1a8cff;
            --primary-600: #0073e6;
            --primary-700: #005bb8;
            --accent-500: #d946ef;
            --surface-50: #f8fafc;
            --surface-100: #f1f5f9;
            --surface-200: #e2e8f0;
            --surface-700: #334155;
            --surface-800: #1e293b;
            --surface-900: #0f172a;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            color: var(--surface-800);
            background: #ffffff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px -8px rgba(0, 0, 0, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--surface-900);
            flex-shrink: 0;
        }

        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--surface-600);
            border-radius: 8px;
            transition: all 0.2s ease;
            position: relative;
        }

        .nav-links li a:hover {
            color: var(--primary-600);
            background: var(--surface-50);
        }

        .nav-links li a.active {
            color: var(--primary-600);
            background: rgba(26, 140, 255, 0.08);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--surface-50);
            border: 1px solid var(--surface-200);
            border-radius: 100px;
            padding: 0 16px;
            height: 40px;
            width: 200px;
            transition: all 0.25s ease;
        }

        .search-box:focus-within {
            border-color: var(--primary-400);
            box-shadow: 0 0 0 3px rgba(26, 140, 255, 0.1);
            background: #fff;
            width: 240px;
        }

        .search-box i {
            color: var(--surface-400);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--surface-800);
            width: 100%;
            font-family: inherit;
        }

        .search-box input::placeholder {
            color: var(--surface-400);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 100px;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            font-family: inherit;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
            color: #fff;
            box-shadow: 0 4px 14px -4px rgba(26, 140, 255, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px -6px rgba(26, 140, 255, 0.45);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px -2px rgba(26, 140, 255, 0.3);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--surface-200);
            color: var(--surface-700);
        }

        .btn-outline:hover {
            border-color: var(--primary-400);
            color: var(--primary-600);
            background: rgba(26, 140, 255, 0.04);
        }

        .btn-sm {
            padding: 6px 16px;
            font-size: 0.85rem;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--surface-700);
            cursor: pointer;
            padding: 4px;
            border-radius: 6px;
            transition: background 0.2s;
        }

        .mobile-toggle:hover {
            background: var(--surface-100);
        }

        .mobile-nav {
            display: none;
            padding: 16px 24px 24px;
            border-top: 1px solid var(--surface-100);
            background: #fff;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-nav a {
            display: block;
            padding: 10px 14px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--surface-700);
            border-radius: 8px;
            transition: all 0.2s;
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: var(--surface-50);
            color: var(--primary-600);
        }

        .mobile-nav .mobile-search {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--surface-50);
            border: 1px solid var(--surface-200);
            border-radius: 100px;
            padding: 0 16px;
            height: 44px;
            margin-top: 8px;
        }

        .mobile-nav .mobile-search i {
            color: var(--surface-400);
        }

        .mobile-nav .mobile-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.95rem;
            width: 100%;
            font-family: inherit;
            color: var(--surface-800);
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-right .search-box {
                display: none;
            }
            .nav-right .btn {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .header-inner {
                height: 64px;
            }
        }

        @media (min-width: 1025px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding: 80px 0 60px;
            background: linear-gradient(170deg, #f0f7ff 0%, #ffffff 100%);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26, 140, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--surface-900);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .page-hero p {
            font-size: 1.15rem;
            color: var(--surface-500);
            max-width: 640px;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--surface-400);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--surface-500);
            transition: color 0.2s;
        }

        .breadcrumb a:hover {
            color: var(--primary-600);
        }

        .breadcrumb span {
            color: var(--surface-700);
            font-weight: 500;
        }

        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--surface-300);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 1.75rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
        }

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

        .section-sm {
            padding: 48px 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--surface-900);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--surface-500);
            max-width: 600px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 4px 20px -6px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: all 0.3s ease;
            overflow: hidden;
        }

        .card:hover {
            box-shadow: 0 12px 40px -12px rgba(0, 0, 0, 0.1);
            transform: translateY(-4px);
            border-color: rgba(26, 140, 255, 0.15);
        }

        .card-body {
            padding: 28px;
        }

        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--surface-100);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--surface-900);
            margin-bottom: 8px;
        }

        .card p {
            font-size: 0.95rem;
            color: var(--surface-500);
            line-height: 1.7;
        }

        .card .tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 100px;
            background: var(--surface-50);
            color: var(--surface-600);
            border: 1px solid var(--surface-200);
            transition: all 0.2s;
        }

        .card .tag:hover {
            background: rgba(26, 140, 255, 0.08);
            border-color: rgba(26, 140, 255, 0.2);
            color: var(--primary-600);
        }

        .card .tag-primary {
            background: rgba(26, 140, 255, 0.08);
            border-color: rgba(26, 140, 255, 0.15);
            color: var(--primary-600);
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Feature Block ===== */
        .feature-block {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 24px;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--surface-100);
            transition: all 0.3s ease;
        }

        .feature-block:hover {
            border-color: rgba(26, 140, 255, 0.15);
            box-shadow: 0 8px 28px -10px rgba(0, 0, 0, 0.06);
        }

        .feature-block .icon-wrap {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
        }

        .feature-block h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--surface-900);
            margin-bottom: 4px;
        }

        .feature-block p {
            font-size: 0.92rem;
            color: var(--surface-500);
            line-height: 1.6;
        }

        /* ===== Steps ===== */
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--surface-100);
            transition: all 0.3s ease;
            position: relative;
        }

        .step-item:hover {
            border-color: rgba(26, 140, 255, 0.12);
            box-shadow: 0 4px 16px -6px rgba(0, 0, 0, 0.04);
        }

        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--surface-900);
            margin-bottom: 4px;
        }

        .step-item p {
            font-size: 0.92rem;
            color: var(--surface-500);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--surface-100);
            padding: 20px 0;
        }

        .faq-item:first-child {
            padding-top: 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--surface-800);
            cursor: pointer;
            padding: 4px 0;
            transition: color 0.2s;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--primary-600);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--surface-400);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding-top: 12px;
            font-size: 0.95rem;
            color: var(--surface-500);
            line-height: 1.7;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            padding: 80px 0;
            border-radius: 24px;
            margin: 0 24px;
        }

        .cta-section h2 {
            font-size: 2.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 540px;
            margin: 0 auto 32px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 24px;
                margin: 0 16px;
                border-radius: 16px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--surface-900);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .site-footer {
                margin-top: 48px;
                padding: 40px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .bg-soft-primary {
            background: rgba(26, 140, 255, 0.04);
        }

        .border-soft {
            border: 1px solid var(--surface-100);
        }

        .rounded-2xl {
            border-radius: 1rem;
        }

        .shadow-card {
            box-shadow: 0 4px 20px -6px rgba(0, 0, 0, 0.06);
        }

        .gap-6 {
            gap: 24px;
        }
        .gap-8 {
            gap: 32px;
        }

        @media (max-width: 768px) {
            .text-center-mobile {
                text-align: center;
            }
        }

        /* ===== Content List ===== */
        .content-list-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--surface-100);
            align-items: flex-start;
        }

        .content-list-item:first-child {
            padding-top: 0;
        }

        .content-list-item .thumb {
            flex-shrink: 0;
            width: 120px;
            height: 80px;
            border-radius: 12px;
            background: var(--surface-100);
            object-fit: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--surface-300);
        }

        .content-list-item .info h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--surface-900);
            margin-bottom: 4px;
            transition: color 0.2s;
        }

        .content-list-item .info h4:hover {
            color: var(--primary-600);
        }

        .content-list-item .info p {
            font-size: 0.9rem;
            color: var(--surface-500);
            line-height: 1.6;
        }

        .content-list-item .info .meta {
            font-size: 0.8rem;
            color: var(--surface-400);
            margin-top: 6px;
            display: flex;
            gap: 16px;
            align-items: center;
        }

        @media (max-width: 768px) {
            .content-list-item {
                flex-direction: column;
            }
            .content-list-item .thumb {
                width: 100%;
                height: 160px;
            }
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 100px;
            background: var(--surface-50);
            color: var(--surface-600);
            border: 1px solid var(--surface-200);
        }

        .badge-primary {
            background: rgba(26, 140, 255, 0.08);
            border-color: rgba(26, 140, 255, 0.15);
            color: var(--primary-600);
        }

        .badge-accent {
            background: rgba(217, 70, 239, 0.08);
            border-color: rgba(217, 70, 239, 0.15);
            color: var(--accent-500);
        }

        /* ===== Stats ===== */
        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--surface-900);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--surface-500);
            margin-top: 4px;
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Base Reset ===== */
        *,
        *::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-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }

        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;
            outline: none;
            border: none;
        }

        ul {
            list-style: none;
        }

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

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation (SaaS style) ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        /* Nav links */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-links li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }

        .nav-links li a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-links li a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }

        /* Right section */
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 6px 16px 6px 14px;
            gap: 8px;
            transition: all var(--transition);
            width: 200px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            background: var(--bg-white);
        }

        .search-box i {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .search-box input {
            background: transparent;
            border: none;
            padding: 4px 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.30);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-primary);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .btn-secondary:hover {
            background: var(--bg-body);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #f97316);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.30);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 6px 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: var(--primary-light);
        }

        /* Mobile nav */
        .mobile-nav {
            display: none;
            flex-direction: column;
            padding: 12px 24px 20px;
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            gap: 4px;
        }

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

        .mobile-nav a {
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 8px 16px;
            gap: 8px;
            margin-top: 8px;
        }

        .mobile-search i {
            color: var(--text-muted);
        }

        .mobile-search input {
            background: transparent;
            border: none;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 60px 0 30px;
            margin-top: 60px;
        }

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

        .footer-brand .logo {
            color: #f1f5f9;
            margin-bottom: 14px;
        }

        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #f1f5f9;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.15);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #64748b;
        }

        .footer-bottom a {
            color: #94a3b8;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links li a {
                padding: 6px 12px;
                font-size: 0.85rem;
            }
            .search-box {
                width: 150px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-right .search-box,
            .nav-right .btn {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .header-inner {
                height: 60px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
            }
            .logo {
                font-size: 1rem;
            }
            .logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
            .mobile-nav {
                padding: 12px 16px 16px;
            }
            .container {
                padding: 0 12px;
            }
        }

        /* ===== Page-specific styles ===== */
        .page-hero {
            padding: 60px 0 40px;
            background: linear-gradient(135deg, #eff6ff 0%, #f0f0ff 100%);
        }

        .page-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 16px;
        }

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

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 560px;
            margin-bottom: 32px;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }

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

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 16px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.20);
        }

        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .download-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            text-align: center;
            transition: all var(--transition);
        }

        .download-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .download-card .icon-big {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 16px;
            color: #fff;
        }

        .download-card .icon-big.ios {
            background: linear-gradient(135deg, #1a1a2e, #16213e);
        }

        .download-card .icon-big.android {
            background: linear-gradient(135deg, #0f9b0f, #16a34a);
        }

        .download-card .icon-big.web {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
        }

        .download-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .download-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
        }

        .badge.green {
            background: #dcfce7;
            color: #16a34a;
        }

        .badge.amber {
            background: #fef3c7;
            color: #d97706;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
        }

        .faq-item:first-child {
            padding-top: 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            transition: color var(--transition);
            padding: 4px 0;
        }

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

        .faq-question i {
            color: var(--text-muted);
            transition: transform var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s 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, #1e3a8a, #312e81);
            border-radius: var(--radius);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: #c7d2fe;
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--bg-body);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

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

        @media (max-width: 640px) {
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }

        /* Smooth transitions for all interactive */
        .btn,
        .step-card,
        .download-card,
        .tag,
        .nav-links li a {
            transition: all var(--transition);
        }

/* roulang page: category3 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-alt: #1e293b;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.16);
            --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;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

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

        /* ===== Header & Navigation ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .nav-links {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 4px;
            align-items: center;
            flex: 1;
            justify-content: center;
        }

        .nav-links li a {
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.94rem;
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .nav-links li a.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.1);
            font-weight: 600;
        }

        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            padding: 8px 18px;
            gap: 10px;
            transition: all var(--transition);
            min-width: 180px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            background: #fff;
        }

        .search-box i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
            font-family: inherit;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.92rem;
            font-family: inherit;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.4);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .btn-secondary {
            background: var(--bg-body);
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background: var(--border-color);
            transform: translateY(-1px);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #059669);
            color: #fff;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(16, 185, 129, 0.4);
            color: #fff;
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: var(--bg-body);
        }

        .mobile-nav {
            display: none;
            padding: 16px 24px 24px;
            background: #fff;
            border-top: 1px solid var(--border-color);
            flex-direction: column;
            gap: 6px;
        }

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

        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .mobile-nav a:hover {
            background: rgba(37, 99, 235, 0.06);
            color: var(--primary);
        }

        .mobile-nav a.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.1);
            font-weight: 600;
        }

        .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            padding: 10px 18px;
            gap: 10px;
            margin-top: 8px;
        }

        .mobile-search i {
            color: var(--text-muted);
        }

        .mobile-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
            font-family: inherit;
        }

        /* ===== Hero (Category Page) ===== */
        .category-hero {
            padding: 64px 0 56px;
            background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 50%, #fefce8 100%);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 0 0 16px;
            letter-spacing: -0.03em;
            line-height: 1.2;
        }

        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .category-hero .hero-badges {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 500;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, 0.12);
        }

        .badge i {
            font-size: 0.75rem;
        }

        .badge-warning {
            background: rgba(245, 158, 11, 0.1);
            color: var(--secondary-dark);
            border-color: rgba(245, 158, 11, 0.2);
        }

        .badge-success {
            background: rgba(16, 185, 129, 0.1);
            color: #059669;
            border-color: rgba(16, 185, 129, 0.2);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

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

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

        .section-dark .section-title {
            color: var(--text-light);
        }

        .section-dark .section-subtitle {
            color: rgba(241, 245, 249, 0.7);
        }

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

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }

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

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
        }

        .card-icon.green {
            background: linear-gradient(135deg, var(--accent), #059669);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.25);
        }

        .card-icon.amber {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.25);
        }

        .card-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
            box-shadow: 0 6px 20px rgba(139, 92, 246, 0.25);
        }

        .card-icon.rose {
            background: linear-gradient(135deg, #f43f5e, #e11d48);
            box-shadow: 0 6px 20px rgba(244, 63, 94, 0.25);
        }

        .card-icon.cyan {
            background: linear-gradient(135deg, #06b6d4, #0891b2);
            box-shadow: 0 6px 20px rgba(6, 182, 212, 0.25);
        }

        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .card .card-tag {
            display: inline-block;
            margin-top: 16px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 14px;
            border-radius: 100px;
        }

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

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

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

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }

        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== 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-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.2);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            gap: 16px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(37, 99, 235, 0.02);
        }

        .faq-question i {
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            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;
            color: var(--text-secondary);
            font-size: 0.94rem;
            line-height: 1.7;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2332 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(241, 245, 249, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(241, 245, 249, 0.7);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(226, 232, 240, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 320px;
            color: rgba(241, 245, 249, 0.6);
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            color: rgba(241, 245, 249, 0.6);
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(241, 245, 249, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(241, 245, 249, 0.5);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

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

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

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

            .category-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-right {
                display: none;
            }

            .mobile-toggle {
                display: block;
            }

            .header-inner {
                height: 64px;
            }

            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

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

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

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

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

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

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

            .cta-section h2 {
                font-size: 1.6rem;
            }

            .cta-section p {
                font-size: 0.95rem;
            }

            .btn-lg {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

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

            .category-hero h1 {
                font-size: 1.5rem;
            }

            .logo {
                font-size: 1.1rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .card {
                padding: 24px 20px;
            }

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

            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }

            .faq-answer {
                font-size: 0.88rem;
            }
        }

        /* ===== Utility Animations ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 0.6s ease forwards;
        }

        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }
        .delay-5 {
            animation-delay: 0.5s;
        }
        .delay-6 {
            animation-delay: 0.6s;
        }