/* roulang page: index */
:root {
            --brand: #7C3AED;
            --brand-dark: #5b21b6;
            --brand-light: #b08aff;
            --accent: #F59E0B;
            --accent-dark: #d97706;
            --bg-dark: #0B0B1A;
            --bg-card: #12122A;
            --border-dark: #1E1E3A;
            --text-white: #FFFFFF;
            --text-muted: #9CA3AF;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-btn: 0 4px 16px rgba(124, 58, 237, 0.35);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #0B0B1A;
            color: #F3F4F6;
            line-height: 1.6;
            -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;
            outline: none;
            border: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            color: #FFFFFF;
        }
        .section-sub {
            font-size: 1.05rem;
            color: #9CA3AF;
            max-width: 600px;
            line-height: 1.7;
        }
        .section-head {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-head .section-sub {
            margin: 0 auto;
        }
        .card {
            background: #12122A;
            border: 1px solid #1E1E3A;
            border-radius: var(--radius);
            padding: 1.5rem;
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: linear-gradient(135deg, #7C3AED, #6d28d9);
            color: #FFFFFF;
            box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(124, 58, 237, 0.5);
            background: linear-gradient(135deg, #8c5aff, #7C3AED);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: #FFFFFF;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            border-color: #7C3AED;
            background: rgba(124, 58, 237, 0.12);
        }
        .btn-accent {
            background: linear-gradient(135deg, #F59E0B, #d97706);
            color: #0B0B1A;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.45);
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }
        .badge-hot {
            background: rgba(239, 68, 68, 0.18);
            color: #FCA5A5;
            border: 1px solid rgba(239, 68, 68, 0.25);
        }
        .badge-new {
            background: rgba(16, 185, 129, 0.18);
            color: #6EE7B7;
            border: 1px solid rgba(16, 185, 129, 0.25);
        }
        .badge-brand {
            background: rgba(124, 58, 237, 0.18);
            color: #c4b5fd;
            border: 1px solid rgba(124, 58, 237, 0.25);
        }
        .divider {
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.3), transparent);
            margin: 2rem 0;
        }
        .glow {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
            opacity: 0.35;
        }
        .section-alt {
            background: #0F0F24;
        }
        .text-muted {
            color: #9CA3AF;
        }
        .input-field {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 9999px;
            padding: 0.75rem 1.5rem;
            color: #FFFFFF;
            font-size: 0.95rem;
            transition: var(--transition);
            width: 100%;
        }
        .input-field:focus {
            border-color: #7C3AED;
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }
        .input-field::placeholder {
            color: #6B7280;
        }
        .nav-link {
            position: relative;
            padding: 0.5rem 0;
            font-weight: 500;
            color: #D1D5DB;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: #7C3AED;
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-link:hover {
            color: #FFFFFF;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: #FFFFFF;
        }
        .nav-link.active::after {
            width: 100%;
            background: linear-gradient(90deg, #7C3AED, #b08aff);
        }
        .mobile-nav {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .mobile-nav.open {
            max-height: 400px;
        }
        .step-card {
            position: relative;
            padding-left: 3rem;
        }
        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 2.25rem;
            height: 2.25rem;
            border-radius: 50%;
            background: linear-gradient(135deg, #7C3AED, #6d28d9);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: #FFFFFF;
            box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
        }
        .step-line {
            position: absolute;
            left: 1.05rem;
            top: 2.75rem;
            bottom: -1.5rem;
            width: 2px;
            background: linear-gradient(180deg, rgba(124, 58, 237, 0.4), transparent);
        }
        .step-card:last-child .step-line {
            display: none;
        }
        .faq-q {
            cursor: pointer;
            padding: 1.25rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: var(--transition);
        }
        .faq-q:hover {
            color: #c4b5fd;
        }
        .faq-q .icon {
            font-size: 1.2rem;
            color: #7C3AED;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: #9CA3AF;
            line-height: 1.7;
        }
        .faq-a.open {
            max-height: 300px;
            padding-bottom: 1.25rem;
        }
        .faq-item.active .faq-q .icon {
            transform: rotate(45deg);
        }
        .footer-link {
            color: #9CA3AF;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: #c4b5fd;
        }
        .hero-search-wrap {
            position: relative;
            max-width: 520px;
            width: 100%;
        }
        .hero-search-wrap .input-field {
            padding-right: 3.5rem;
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.15);
        }
        .hero-search-wrap .search-btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            background: linear-gradient(135deg, #7C3AED, #6d28d9);
            color: #fff;
            border-radius: 9999px;
            padding: 0.45rem 1rem;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .hero-search-wrap .search-btn:hover {
            background: linear-gradient(135deg, #8c5aff, #7C3AED);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #FFFFFF, #c4b5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .tag {
            padding: 0.25rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.06);
            color: #D1D5DB;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
            cursor: default;
        }
        .tag:hover {
            background: rgba(124, 58, 237, 0.12);
            border-color: rgba(124, 58, 237, 0.2);
        }
        .news-card {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }
        .news-card:last-child {
            border-bottom: none;
        }
        .news-card:hover {
            padding-left: 0.5rem;
        }
        .news-card .news-date {
            flex-shrink: 0;
            min-width: 60px;
            font-size: 0.85rem;
            color: #6B7280;
        }
        .news-card .news-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #F3F4F6;
            transition: var(--transition);
        }
        .news-card:hover .news-info h4 {
            color: #c4b5fd;
        }
        .news-card .news-info p {
            font-size: 0.9rem;
            color: #9CA3AF;
            line-height: 1.6;
        }
        .news-card .news-cat {
            font-size: 0.75rem;
            color: #7C3AED;
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        .cover-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: #12122A;
            border: 1px solid #1E1E3A;
            transition: var(--transition);
        }
        .cover-card:hover {
            transform: translateY(-6px);
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
        }
        .cover-card .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .cover-card:hover .cover-img {
            transform: scale(1.03);
        }
        .cover-card .cover-body {
            padding: 1.25rem 1.25rem 1.5rem;
        }
        .cover-card .cover-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: #FFFFFF;
        }
        .cover-card .cover-body p {
            font-size: 0.9rem;
            color: #9CA3AF;
            line-height: 1.6;
        }
        .cover-card .cover-tags {
            display: flex;
            gap: 0.4rem;
            flex-wrap: wrap;
            margin-bottom: 0.75rem;
        }
        .cta-section {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-lg);
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.3;
        }
        .cta-section .cta-overlay {
            position: relative;
            z-index: 1;
            padding: 4rem 2rem;
            text-align: center;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(11, 11, 26, 0.85));
        }
        @media (max-width: 1024px) {
            .container {
                padding: 0 1.25rem;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.5rem;
            }
            .section-head {
                margin-bottom: 2rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .hero-search-wrap {
                max-width: 100%;
            }
            .stat-number {
                font-size: 1.75rem;
            }
            .cover-card .cover-img {
                height: 160px;
            }
            .news-card {
                flex-direction: column;
                gap: 0.5rem;
                padding: 1rem 0;
            }
            .news-card .news-date {
                min-width: auto;
            }
            .cta-section .cta-overlay {
                padding: 2.5rem 1.25rem;
            }
            .step-card {
                padding-left: 2.5rem;
            }
            .step-number {
                width: 1.85rem;
                height: 1.85rem;
                font-size: 0.75rem;
            }
            .step-line {
                left: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .btn {
                padding: 0.6rem 1.5rem;
                font-size: 0.85rem;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .cover-card .cover-img {
                height: 140px;
            }
            .cover-card .cover-body {
                padding: 1rem;
            }
        }
        @media (max-width: 380px) {
            .section-title {
                font-size: 1.15rem;
            }
            .cover-card .cover-body h4 {
                font-size: 0.95rem;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            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;
        }
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #0B0B1A;
        }
        ::-webkit-scrollbar-thumb {
            background: #7C3AED;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #6d28d9;
        }
        :focus-visible {
            outline: 2px solid #7C3AED;
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: category1 */
:root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-400: #f472b6;
            --accent-500: #ec4899;
            --accent-600: #db2777;
            --dark-bg: #070712;
            --dark-surface: #0f0f1f;
            --dark-card: #14142a;
            --dark-border: #1e1e3a;
            --text-primary: #f1f1f9;
            --text-secondary: #9ca3af;
            --text-muted: #6b7280;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(99, 102, 241, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(7, 7, 18, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30, 30, 58, 0.6);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(7, 7, 18, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .nav-link {
            position: relative;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 0.5rem 0;
            transition: var(--transition);
            text-decoration: none;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
            border-radius: 2px;
            transition: var(--transition);
        }

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

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

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

        .nav-link.active::after {
            width: 100%;
            background: linear-gradient(90deg, var(--brand-400), var(--accent-400));
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: none;
            font-size: 0.9rem;
            padding: 0.7rem 1.5rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            color: #fff;
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.45);
            background: linear-gradient(135deg, var(--brand-400), var(--brand-600));
        }

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

        .btn-outline {
            border: 1.5px solid rgba(99, 102, 241, 0.4);
            color: var(--brand-400);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--brand-500);
            background: rgba(99, 102, 241, 0.1);
            transform: translateY(-2px);
        }

        .btn-sm {
            font-size: 0.8rem;
            padding: 0.5rem 1.2rem;
        }

        .btn-lg {
            font-size: 1rem;
            padding: 0.9rem 2rem;
        }

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

        @media (max-width: 768px) {
            .section-padding {
                padding: 3.5rem 0;
            }
        }

        /* Cards */
        .card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .card-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
        }

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(99, 102, 241, 0.15);
            color: var(--brand-400);
            border: 1px solid rgba(99, 102, 241, 0.2);
        }

        .badge-accent {
            background: rgba(236, 72, 153, 0.15);
            color: var(--accent-400);
            border-color: rgba(236, 72, 153, 0.2);
        }

        .badge-gold {
            background: rgba(251, 191, 36, 0.15);
            color: #fbbf24;
            border-color: rgba(251, 191, 36, 0.2);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, #fff, var(--brand-400));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 1.5rem;
            }
        }

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

        /* Footer */
        .footer-link {
            color: var(--text-muted);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-link:hover {
            color: var(--brand-400);
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(7, 7, 18, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

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

        .mobile-menu a {
            font-size: 1.25rem;
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--text-primary);
        }

        .hamburger {
            display: flex;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            z-index: 1001;
            background: none;
            border: none;
        }

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

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

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

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

        /* Hero inner */
        .hero-inner {
            position: relative;
            padding: 10rem 0 5rem;
            min-height: 40vh;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.3;
            z-index: 0;
        }

        .hero-inner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 7, 18, 0.92) 0%, rgba(7, 7, 18, 0.7) 50%, rgba(7, 7, 18, 0.92) 100%);
            z-index: 1;
        }

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

        /* Timeline / Steps */
        .step-item {
            position: relative;
            padding-left: 3rem;
            padding-bottom: 2.5rem;
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: 0.7rem;
            top: 0.4rem;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--brand-500), rgba(99, 102, 241, 0.1));
        }

        .step-item:last-child::before {
            display: none;
        }

        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 1.6rem;
            height: 1.6rem;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            color: #fff;
            z-index: 2;
        }

        /* FAQ */
        .faq-item {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(99, 102, 241, 0.2);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
        }

        .faq-question i {
            transition: var(--transition);
            color: var(--brand-400);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 1rem;
        }

        /* Grid helpers */
        .grid-cards {
            display: grid;
            gap: 1.5rem;
        }

        @media (min-width: 640px) {
            .grid-cards-2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 768px) {
            .grid-cards-3 {
                grid-template-columns: repeat(3, 1fr);
            }
        }

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

        /* Stats */
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #fff, var(--brand-400));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Tags */
        .tag {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(99, 102, 241, 0.08);
            color: var(--text-secondary);
            border: 1px solid rgba(30, 30, 58, 0.8);
            transition: var(--transition);
            text-decoration: none;
        }

        .tag:hover {
            background: rgba(99, 102, 241, 0.15);
            color: var(--brand-400);
            border-color: rgba(99, 102, 241, 0.3);
        }

        /* Divider */
        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--dark-border), transparent);
            margin: 2rem 0;
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--dark-bg);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--dark-border);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--brand-600);
        }

        @media (max-width: 640px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .hero-inner {
                padding: 8rem 0 3rem;
                min-height: 30vh;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .card {
                padding: 1.25rem;
            }
            .step-item {
                padding-left: 2.5rem;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
            --dark-bg: #070712;
            --dark-card: #0f0f2a;
            --dark-border: #1E1E3A;
            --text-muted: #9ca3af;
            --text-light: #f3f4f6;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.5rem;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(99, 102, 241, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--dark-bg);
            color: #e5e7eb;
            line-height: 1.7;
            -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;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.375rem 0.125rem;
            letter-spacing: 0.01em;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: #fff;
        }
        .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);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            padding: 0.75rem 1.75rem;
            font-size: 0.95rem;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            color: #fff;
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(99, 102, 241, 0.5);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--dark-border);
            color: var(--text-light);
        }
        .btn-outline:hover {
            border-color: var(--brand-500);
            color: var(--brand-400);
            background: rgba(99, 102, 241, 0.08);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .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(99, 102, 241, 0.15);
            color: var(--brand-400);
            border: 1px solid rgba(99, 102, 241, 0.25);
            transition: var(--transition);
        }
        .badge:hover {
            background: rgba(99, 102, 241, 0.25);
            border-color: var(--brand-500);
        }
        .badge-accent {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent-500);
            border-color: rgba(245, 158, 11, 0.25);
        }
        .badge-accent:hover {
            background: rgba(245, 158, 11, 0.25);
            border-color: var(--accent-500);
        }
        .card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            border-color: rgba(99, 102, 241, 0.3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 1.5rem;
        }
        .footer-link {
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .footer-link:hover {
            color: var(--brand-400);
            padding-left: 4px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #fff 40%, var(--brand-400));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.25;
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            line-height: 1.6;
        }
        .divider-gradient {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--dark-border), transparent);
            margin: 2.5rem 0;
        }
        .article-content h2 {
            font-size: 1.65rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: #f3f4f6;
            border-bottom: 1px solid var(--dark-border);
            padding-bottom: 0.6rem;
        }
        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #e5e7eb;
        }
        .article-content p {
            margin-bottom: 1.25rem;
            color: #d1d5db;
            line-height: 1.85;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
            color: #d1d5db;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .article-content a {
            color: var(--brand-400);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--brand-300);
        }
        .article-content blockquote {
            border-left: 4px solid var(--brand-500);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(99, 102, 241, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: #9ca3af;
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.75rem auto;
            box-shadow: var(--shadow-card);
        }
        .article-content code {
            background: rgba(99, 102, 241, 0.12);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--brand-400);
        }
        .article-content pre {
            background: #0a0a1a;
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .article-content pre code {
            background: none;
            padding: 0;
            color: #e5e7eb;
        }
        .pagination-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.25rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--dark-border);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .pagination-link:hover {
            border-color: var(--brand-500);
            color: var(--brand-400);
            background: rgba(99, 102, 241, 0.06);
        }
        .pagination-link.disabled {
            opacity: 0.4;
            pointer-events: none;
        }
        .tag-chip {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            border-radius: 9999px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .tag-chip:hover {
            background: rgba(99, 102, 241, 0.12);
            border-color: rgba(99, 102, 241, 0.3);
            color: var(--brand-400);
        }
        .related-card .card-img {
            aspect-ratio: 16/10;
        }
        .related-card .card-body {
            padding: 1.25rem;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .slide-up {
            opacity: 0;
            transform: translateY(30px);
            animation: slideUp 0.6s ease forwards;
        }
        @keyframes slideUp {
            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;
        }
        .mobile-nav-open {
            max-height: 500px !important;
            opacity: 1 !important;
            padding-top: 1rem !important;
            padding-bottom: 1rem !important;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
            .container-narrow {
                padding: 0 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .article-content p {
                font-size: 0.95rem;
            }
            .card-body {
                padding: 1.15rem;
            }
            .related-card .card-body {
                padding: 1rem;
            }
            .related-card .card-body h4 {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.35rem;
            }
            .badge {
                font-size: 0.7rem;
                padding: 0.2rem 0.65rem;
            }
            .btn {
                padding: 0.6rem 1.25rem;
                font-size: 0.85rem;
            }
            .article-content h2 {
                font-size: 1.2rem;
            }
            .article-content h3 {
                font-size: 1rem;
            }
        }
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--dark-border);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--brand-600);
        }
        :focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 3px;
            border-radius: 4px;
        }