/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --secondary: #7c3aed;
            --secondary-light: #a78bfa;
            --accent: #06b6d4;
            --surface: #f8fafc;
            --surface-dark: #0f172a;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--surface);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.625rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
        }

        .card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            line-height: 1.5;
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(30, 64, 175, 0.35);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            box-shadow: 0 6px 20px rgba(30, 64, 175, 0.45);
            transform: translateY(-1px);
            color: #ffffff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.25);
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.4);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #ffffff;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 500;
            line-height: 1.4;
        }

        .badge-primary {
            background: rgba(30, 64, 175, 0.1);
            color: var(--primary);
        }

        .badge-secondary {
            background: rgba(124, 58, 237, 0.1);
            color: var(--secondary);
        }

        .badge-accent {
            background: rgba(6, 182, 212, 0.1);
            color: #0891b2;
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            padding: 0.5rem 0.25rem;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

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

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

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

        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #1e40af 100%);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(30, 64, 175, 0.3) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(124, 58, 237, 0.2) 0%, transparent 60%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 4rem 0;
        }

        .step-card {
            position: relative;
            padding: 2rem;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 3rem;
            height: 3rem;
            border-radius: 9999px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            font-weight: 700;
            font-size: 1.25rem;
            flex-shrink: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 1.25rem 0;
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            text-align: left;
            font-weight: 600;
            font-size: 1.0625rem;
            color: var(--text-primary);
            padding: 0.5rem 0;
            cursor: pointer;
            background: none;
            border: none;
            transition: color 0.2s ease;
        }

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

        .faq-question .icon {
            font-size: 1.25rem;
            transition: transform 0.3s ease;
            color: var(--text-light);
            flex-shrink: 0;
            margin-left: 1rem;
        }

        .faq-question.open .icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0.5rem 0 0;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0.75rem 0.5rem 0.5rem 0;
        }

        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }

        .stat-number {
            font-size: 2.75rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
        }

        .footer {
            background: var(--surface-dark);
            color: #cbd5e1;
        }

        .footer a {
            color: #94a3b8;
            transition: color 0.2s ease;
        }

        .footer a:hover {
            color: #ffffff;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: -0.02em;
        }

        .news-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .news-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 1.25rem;
        }

        .news-card-title {
            font-weight: 600;
            font-size: 1.0625rem;
            color: var(--text-primary);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.8125rem;
            color: var(--text-light);
            margin-top: 0.75rem;
        }

        .feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 3.5rem;
            height: 3.5rem;
            border-radius: var(--radius);
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        .feature-icon.blue {
            background: rgba(30, 64, 175, 0.1);
            color: var(--primary);
        }

        .feature-icon.violet {
            background: rgba(124, 58, 237, 0.1);
            color: var(--secondary);
        }

        .feature-icon.cyan {
            background: rgba(6, 182, 212, 0.1);
            color: #0891b2;
        }

        .feature-icon.emerald {
            background: rgba(16, 185, 129, 0.1);
            color: #059669;
        }

        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #ffffff;
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
            z-index: 1000;
            padding: 2rem 1.5rem;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
        }

        .mobile-nav.open {
            right: 0;
        }

        .mobile-nav-backdrop {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(4px);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }

        .mobile-nav-backdrop.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav-link {
            display: block;
            padding: 0.75rem 0;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border);
            transition: color 0.2s ease;
        }

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

        @media (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
            }
            .stat-number {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                min-height: 60vh;
            }
            .btn {
                padding: 0.625rem 1.25rem;
                font-size: 0.9375rem;
            }
            .stat-number {
                font-size: 1.75rem;
            }
        }

        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 3rem;
            height: 3rem;
            border-radius: 9999px;
            background: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            box-shadow: var(--shadow-md);
            z-index: 50;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: all 0.3s ease;
        }

        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .scroll-top:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            color: #ffffff;
        }

        .cms-list-empty {
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--text-light);
            font-size: 1.0625rem;
        }

        .glow-card {
            position: relative;
            overflow: hidden;
        }

        .glow-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.06), transparent 60%);
            opacity: 0;
            transition: opacity 0.5s ease;
            pointer-events: none;
        }

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

        .cover-img-wrapper {
            border-radius: var(--radius);
            overflow: hidden;
        }

        .cover-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .cover-img-wrapper:hover img {
            transform: scale(1.05);
        }

/* roulang page: category1 */
:root {
            --primary: #4F46E5;
            --primary-dark: #3730A3;
            --primary-light: #818CF8;
            --secondary: #0EA5E9;
            --secondary-dark: #0284C7;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --bg-light: #F8FAFC;
            --bg-card: #FFFFFF;
            --border-light: #E2E8F0;
            --radius-card: 0.75rem;
            --radius-btn: 0.5rem;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            color: var(--text-primary);
            background: #FFFFFF;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* Navigation */
        .nav-link {
            position: relative;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.35rem 0.1rem;
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }

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

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

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

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
            outline: none;
            font-size: 0.9rem;
            padding: 0.65rem 1.5rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: var(--shadow-btn, 0 2px 6px rgba(79, 70, 229, 0.25));
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 1px 4px rgba(79, 70, 229, 0.2);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.2);
        }

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

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            background: #f8f9ff;
        }

        /* Cards */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
        }

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

        /* Badge */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.25rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            border: 1px solid rgba(79, 70, 229, 0.12);
        }

        .badge-success {
            background: rgba(16, 185, 129, 0.1);
            color: #059669;
            border-color: rgba(16, 185, 129, 0.15);
        }

        .badge-warning {
            background: rgba(245, 158, 11, 0.1);
            color: #D97706;
            border-color: rgba(245, 158, 11, 0.15);
        }

        /* Footer */
        .footer {
            background: #0F172A;
            color: #94A3B8;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #818CF8, #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            background: #fff;
            transition: all 0.25s ease;
        }

        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 2px 12px rgba(79, 70, 229, 0.06);
        }

        .faq-question {
            cursor: pointer;
            user-select: none;
        }

        .faq-question::-webkit-details-marker {
            display: none;
        }

        .faq-item[open] .faq-question .fa-chevron-down {
            transform: rotate(180deg);
        }

        /* Step connector */
        .step-connector {
            width: 2px;
            height: 40px;
            background: linear-gradient(to bottom, var(--primary-light), var(--secondary));
            margin: 0 auto;
            border-radius: 2px;
        }

        /* Hero overlay */
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.7) 100%);
        }

        /* Feature icon circle */
        .icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .card:hover .icon-circle {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #312E81 100%);
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }

        ::-webkit-scrollbar-thumb {
            background: #94A3B8;
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #64748B;
        }

        /* Focus visible */
        *:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Mobile nav */
        @media (max-width: 767px) {
            .container {
                padding: 0 1rem;
            }

            .mobile-nav-open .mobile-menu {
                transform: translateX(0);
                opacity: 1;
                visibility: visible;
            }

            .mobile-menu {
                position: fixed;
                top: 0;
                right: 0;
                width: 280px;
                height: 100vh;
                background: #fff;
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.12);
                z-index: 100;
                transform: translateX(100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                padding: 1.5rem;
                display: flex;
                flex-direction: column;
            }

            .mobile-overlay {
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 99;
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
            }

            .mobile-nav-open .mobile-overlay {
                opacity: 1;
                visibility: visible;
            }

            .hero-title {
                font-size: 2rem !important;
                line-height: 1.2 !important;
            }

            .hero-sub {
                font-size: 1rem !important;
            }

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

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr !important;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr) !important;
            }

            .grid-4 {
                grid-template-columns: repeat(2, 1fr) !important;
            }

            .hero-title {
                font-size: 2.6rem !important;
            }
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            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-dark: #4338CA;
            --primary-light: #818CF8;
            --secondary: #7C3AED;
            --secondary-light: #A78BFA;
            --text-primary: #1E1B4B;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --bg-light: #F9FAFB;
            --bg-card: #FFFFFF;
            --border-light: #F3F4F6;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.375rem 0;
            transition: color var(--transition-base);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 2px;
            transition: width var(--transition-base);
        }

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

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

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            outline: none;
            white-space: nowrap;
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.35);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.2);
        }

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

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
        }

        .badge-secondary {
            background: rgba(124, 58, 237, 0.08);
            color: var(--secondary);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

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

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
        }

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

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.25rem;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid transparent;
        }

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

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary-light);
            padding-left: 1.25rem;
            margin: 1.5rem 0;
            color: var(--text-secondary);
            font-style: italic;
            background: rgba(79, 70, 229, 0.04);
            padding: 1rem 1.25rem;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }

        .article-content code {
            background: rgba(79, 70, 229, 0.08);
            padding: 0.15rem 0.5rem;
            border-radius: 0.25rem;
            font-size: 0.9em;
        }

        .article-content pre {
            background: #1E1B4B;
            color: #E5E7EB;
            padding: 1.25rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5rem 0;
        }

        .article-content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.25rem 0;
        }

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

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            cursor: pointer;
            transition: color var(--transition-base);
            user-select: none;
        }

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

        .faq-question .icon {
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
            margin-left: 1rem;
        }

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

        .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-item.active .faq-answer {
            max-height: 300px;
            padding-top: 0.75rem;
        }

        .footer {
            background: #0F0A2E;
            color: #9CA3AF;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer a {
            transition: color var(--transition-base);
        }

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

        .footer h4 {
            color: #fff;
        }

        .hero-overlay {
            position: relative;
        }

        .hero-overlay::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 10, 46, 0.88) 0%, rgba(79, 70, 229, 0.3) 100%);
            z-index: 1;
        }

        .hero-overlay>* {
            position: relative;
            z-index: 2;
        }

        .cta-gradient {
            background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4F46E5 100%);
        }

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

        .recommend-card {
            transition: all var(--transition-base);
        }

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

        .recommend-card img {
            transition: transform 0.5s ease;
        }

        .recommend-card:hover img {
            transform: scale(1.05);
        }

        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            padding: 2rem 1.5rem;
            box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
        }

        .mobile-nav-panel.open {
            right: 0;
        }

        .mobile-nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 99;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }

        .mobile-nav-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav-link {
            display: block;
            padding: 0.75rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border-light);
            transition: color var(--transition-base);
        }

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

        .mobile-nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .not-found-card {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            padding: 3rem 2rem;
            max-width: 560px;
            margin: 0 auto;
            text-align: center;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 1.4rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .not-found-card {
                padding: 2rem 1.25rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .recommend-grid {
                grid-template-columns: 1fr;
            }
        }

        .skip-link {
            position: absolute;
            top: -100px;
            left: 1rem;
            background: var(--primary);
            color: #fff;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            z-index: 1000;
            transition: top 0.3s ease;
        }

        .skip-link:focus {
            top: 0.5rem;
        }