/* roulang page: index */
:root {
            --color-primary: #4f46e5;
            --color-primary-dark: #3730a3;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-dark: #1e1b4b;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --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;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--color-text);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 600px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.45);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--color-accent);
            color: #1e293b;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.45);
        }
        .btn-accent:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 2px;
        }
        .card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--color-bg-alt);
            color: var(--color-primary);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .badge-accent {
            background: #fef3c7;
            color: #92400e;
            border-color: #fde68a;
        }
        .badge-primary {
            background: #eef2ff;
            color: #4338ca;
            border-color: #c7d2fe;
        }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: #f1f5f9;
            color: #475569;
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--color-primary);
            color: #fff;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.03em;
            color: var(--color-primary);
        }
        @media (max-width: 768px) {
            .stat-number {
                font-size: 2rem;
            }
        }
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            margin: 16px 0 24px 0;
        }
        .hero-overlay {
            position: relative;
        }
        .hero-overlay::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 27, 75, 0.88) 0%, rgba(79, 70, 229, 0.72) 100%);
            z-index: 1;
        }
        .hero-overlay>* {
            position: relative;
            z-index: 2;
        }
        .faq-summary {
            cursor: pointer;
            padding: 18px 24px;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
        }
        .faq-summary::-webkit-details-marker {
            display: none;
        }
        .faq-summary:hover {
            border-color: var(--color-primary);
            background: #f8faff;
        }
        .faq-summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--color-text-light);
            transition: var(--transition);
        }
        details[open] .faq-summary::after {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        details[open] .faq-summary {
            border-color: var(--color-primary);
            border-bottom-left-radius: 0;
            border-bottom-right-radius: 0;
        }
        .faq-content {
            padding: 18px 24px 24px 24px;
            border: 1px solid var(--color-primary);
            border-top: 0;
            border-radius: 0 0 var(--radius) var(--radius);
            color: var(--color-text-light);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 18px;
            border-radius: 10px;
            font-weight: 500;
            color: #c7d2fe;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-link.active {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
        }
        .mobile-nav-link {
            display: block;
            padding: 14px 20px;
            font-weight: 500;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .mobile-nav-link:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary);
        }
        .mobile-nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
            background: #eef2ff;
        }
        .footer-link {
            color: #a5b4fc;
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: #fff;
        }
        .gradient-text {
            background: linear-gradient(135deg, #fcd34d, #f59e0b, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .bg-grid {
            background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        @media (max-width: 1024px) {
            .desktop-nav {
                display: none !important;
            }
            .mobile-header {
                display: flex !important;
            }
            .main-content {
                margin-left: 0 !important;
            }
        }
        @media (min-width: 1025px) {
            .desktop-nav {
                display: flex !important;
            }
            .mobile-header {
                display: none !important;
            }
            .main-content {
                margin-left: 260px;
            }
        }
        .mobile-menu-open {
            display: block !important;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-100 {
            animation-delay: 0.1s;
        }
        .delay-200 {
            animation-delay: 0.2s;
        }
        .delay-300 {
            animation-delay: 0.3s;
        }
        .delay-400 {
            animation-delay: 0.4s;
        }
        .feature-card {
            padding: 32px 28px;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: var(--color-primary);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin: 0 auto 20px auto;
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
        }
        .step-card {
            padding: 32px 24px;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            background: var(--color-primary);
            margin-bottom: 16px;
        }
        .cta-section {
            background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 50%, #4f46e5 100%);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius);
            }
        }
        .post-card {
            padding: 24px;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }
        .post-card .post-title {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text);
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card:hover .post-title {
            color: var(--color-primary);
        }
        .post-card .post-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-top: 8px;
        }
        .post-card .post-meta {
            font-size: 0.8rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
        }
        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            position: relative;
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .category-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover img {
            transform: scale(1.05);
        }
        .category-card .cat-body {
            padding: 20px 24px 24px;
        }
        .category-card .cat-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
        }
        .category-card .cat-desc {
            font-size: 0.9rem;
            color: var(--color-text-light);
            margin-top: 6px;
            line-height: 1.6;
        }
        @media (max-width: 640px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .step-card {
                padding: 24px 20px;
            }
            .post-card {
                padding: 18px;
            }
        }
        .scrollbar-thin::-webkit-scrollbar {
            width: 4px;
        }
        .scrollbar-thin::-webkit-scrollbar-track {
            background: transparent;
        }
        .scrollbar-thin::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 8px;
        }
        .scrollbar-thin::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.35);
        }
        .hero-title {
            font-size: clamp(1.8rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
        }
        .hero-sub {
            font-size: clamp(0.95rem, 2vw, 1.15rem);
            line-height: 1.7;
            opacity: 0.9;
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
        }
        .glass-card:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.20);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            color: #a5b4fc;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary-50: #f0f4ff;
            --primary-100: #dbe4ff;
            --primary-200: #bac8ff;
            --primary-300: #91a7ff;
            --primary-400: #748ffc;
            --primary-500: #5c7cfa;
            --primary-600: #4c6ef5;
            --primary-700: #4263eb;
            --primary-800: #3b5bdb;
            --primary-900: #364fc7;
            --primary-950: #1e2a5e;
            --accent-300: #fbbf24;
            --accent-400: #f59e0b;
            --accent-500: #d97706;
            --accent-600: #b45309;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Base Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background: var(--gray-50);
            color: var(--gray-800);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; transition: var(--transition); }
        ul { list-style: none; }

        /* ===== Container ===== */
        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) { .container-custom { padding-left: 2rem; padding-right: 2rem; } }

        /* ===== Layout: Left Nav + Content ===== */
        .page-wrap {
            display: flex;
            min-height: 100vh;
        }
        .main-content {
            margin-left: 260px;
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ===== Desktop Nav ===== */
        .desktop-nav {
            width: 260px;
            background: linear-gradient(180deg, #0f1a3e 0%, #1e2a5e 100%);
            display: flex;
            flex-direction: column;
            z-index: 50;
            box-shadow: 4px 0 24px rgba(0,0,0,0.08);
            position: fixed;
            left: 0;
            top: 0;
            height: 100vh;
            overflow-y: auto;
        }
        .desktop-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .desktop-nav .nav-link i { width: 20px; text-align: center; font-size: 1rem; }
        .desktop-nav .nav-link:hover {
            background: rgba(255,255,255,0.10);
            color: #fff;
        }
        .desktop-nav .nav-link.active {
            background: rgba(245,158,11,0.20);
            color: var(--accent-400);
            font-weight: 600;
        }
        .desktop-nav .nav-link.active i { color: var(--accent-400); }

        /* ===== Mobile Nav ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            background: #0f1a3e;
            padding: 0 1.25rem;
            height: 64px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(0,0,0,0.15);
        }
        .mobile-header .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
        }
        .mobile-header .logo-wrap .icon {
            width: 34px; height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
            display: flex; align-items: center; justify-content: center;
            color: #1e2a5e; font-weight: 700; font-size: 1.1rem;
        }
        .mobile-menu-btn {
            background: none; border: none; color: #fff; font-size: 1.5rem;
            cursor: pointer; padding: 4px;
        }
        .mobile-drawer {
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #0f1a3e;
            z-index: 55;
            padding: 1.5rem 1.25rem;
            display: none;
            overflow-y: auto;
        }
        .mobile-drawer.open { display: block; }
        .mobile-drawer .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 12px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.75);
            font-size: 1rem;
            font-weight: 500;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-drawer .nav-link i { width: 22px; text-align: center; }
        .mobile-drawer .nav-link.active { color: var(--accent-400); background: rgba(245,158,11,0.12); }

        @media (max-width: 1023px) {
            .desktop-nav { display: none; }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: 64px; }
        }

        /* ===== Article Styles ===== */
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--gray-700);
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gray-900);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-200);
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        .article-body p {
            margin-bottom: 1.25rem;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
            list-style: disc;
        }
        .article-body a {
            color: var(--primary-600);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover { color: var(--accent-500); }
        .article-body blockquote {
            border-left: 4px solid var(--accent-400);
            background: var(--gray-100);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--gray-600);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.5rem auto;
            box-shadow: var(--shadow);
        }
        .article-body code {
            background: var(--gray-100);
            padding: 0.2em 0.5em;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-700);
        }
        .article-body pre {
            background: #1e2a5e;
            color: #e5e7eb;
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-100);
            color: var(--primary-700);
        }
        .badge-accent {
            background: rgba(245,158,11,0.15);
            color: var(--accent-600);
        }

        /* ===== Footer Links ===== */
        .footer-link {
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .footer-link:hover { color: var(--accent-400); padding-left: 4px; }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--gray-500);
        }
        .breadcrumb a { color: var(--gray-500); }
        .breadcrumb a:hover { color: var(--primary-600); }
        .breadcrumb .sep { color: var(--gray-300); }

        /* ===== Skeleton / Empty ===== */
        .empty-state {
            text-align: center;
            padding: 4rem 2rem;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .empty-state i { font-size: 3rem; color: var(--gray-300); margin-bottom: 1rem; }
        .empty-state h3 { font-size: 1.3rem; color: var(--gray-600); margin-bottom: 0.5rem; }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 639px) {
            .container-custom { padding-left: 1rem; padding-right: 1rem; }
            .article-body { font-size: 1rem; }
            .article-body h2 { font-size: 1.3rem; }
        }

        /* ===== Scrollbar ===== */
        .scrollbar-thin::-webkit-scrollbar { width: 4px; }
        .scrollbar-thin::-webkit-scrollbar-track { background: transparent; }
        .scrollbar-thin::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

        /* ===== Tailwind custom additions ===== */
        .bg-primary-950 { background-color: #1e2a5e; }
        .text-primary-300 { color: #91a7ff; }
        .text-primary-950 { color: #1e2a5e; }
        .bg-accent-400 { background-color: #f59e0b; }
        .text-accent-400 { color: #f59e0b; }
        .border-accent-400 { border-color: #f59e0b; }
        .hover\:bg-accent-500:hover { background-color: #d97706; }
        .from-accent-400 { --tw-gradient-from: #f59e0b; }
        .to-accent-600 { --tw-gradient-to: #b45309; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary-950: #0b0f1a;
            --primary-900: #141b2b;
            --primary-800: #1e2840;
            --primary-700: #2c3b5a;
            --primary-600: #3d5078;
            --primary-500: #526a96;
            --primary-400: #7b92bc;
            --primary-300: #a8b9d6;
            --primary-200: #d3dceb;
            --primary-100: #eef1f7;
            --accent-400: #f0b429;
            --accent-500: #e8a820;
            --accent-600: #d4951a;
            --accent-700: #b87d14;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: #f8f9fc;
            color: #1a1f36;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 0.75rem;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ::selection {
            background: var(--accent-400);
            color: var(--primary-950);
        }
        :focus-visible {
            outline: 2px solid var(--accent-400);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 左侧导航 ===== */
        .desktop-nav {
            width: 260px;
            background: var(--primary-950);
            color: #fff;
            display: flex;
            flex-direction: column;
            position: fixed;
            left: 0;
            top: 0;
            height: 100vh;
            z-index: 50;
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.25);
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
        }
        .desktop-nav::-webkit-scrollbar {
            width: 4px;
        }
        .desktop-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .desktop-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 0.875rem;
            padding: 0.7rem 1rem;
            border-radius: 0.75rem;
            color: var(--primary-300);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .nav-link i {
            width: 1.25rem;
            text-align: center;
            font-size: 1.05rem;
            color: var(--primary-400);
            transition: var(--transition);
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-link:hover i {
            color: var(--accent-400);
        }
        .nav-link.active {
            background: rgba(240, 180, 41, 0.15);
            color: var(--accent-400);
            font-weight: 600;
        }
        .nav-link.active i {
            color: var(--accent-400);
        }

        /* ===== 主内容区域 ===== */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 页脚链接 ===== */
        .footer-link {
            color: var(--primary-300);
            font-size: 0.9rem;
            transition: var(--transition);
            position: relative;
        }
        .footer-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 1px;
            background: var(--accent-400);
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--accent-400);
        }
        .footer-link:hover::after {
            width: 100%;
        }

        /* ===== 板块标题 ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--primary-950);
            line-height: 1.25;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: #5a6a82;
            max-width: 600px;
            margin-top: 0.5rem;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
        }

        /* ===== 卡片通用 ===== */
        .card-base {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            overflow: hidden;
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.25rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            text-transform: uppercase;
            background: rgba(240, 180, 41, 0.12);
            color: var(--accent-700);
            border: 1px solid rgba(240, 180, 41, 0.2);
        }
        .badge-primary {
            background: rgba(11, 15, 26, 0.06);
            color: var(--primary-700);
            border-color: rgba(11, 15, 26, 0.08);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
            color: var(--primary-950);
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(240, 180, 41, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(240, 180, 41, 0.45);
            color: var(--primary-950);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.7rem 1.8rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--primary-300);
            color: var(--primary-700);
            transition: var(--transition);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--accent-400);
            color: var(--accent-700);
            background: rgba(240, 180, 41, 0.05);
            transform: translateY(-2px);
        }

        /* ===== 分页 ===== */
        .pagination-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 0.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary-600);
            background: #fff;
            border: 1px solid #e2e8f0;
            transition: var(--transition);
        }
        .pagination-link:hover {
            border-color: var(--accent-400);
            color: var(--accent-700);
            background: rgba(240, 180, 41, 0.06);
        }
        .pagination-link.active {
            background: var(--accent-400);
            border-color: var(--accent-400);
            color: var(--primary-950);
        }

        /* ===== 移动端导航切换 ===== */
        .mobile-nav-open .mobile-menu-panel {
            transform: translateX(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: var(--primary-950);
            z-index: 60;
            transform: translateX(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            overflow-y: auto;
            padding: 2rem 1.5rem;
        }
        .mobile-menu-panel .nav-link {
            font-size: 1.1rem;
            padding: 0.9rem 1rem;
        }

        /* ===== 响应式折叠 ===== */
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
        }
        @media (min-width: 1024px) {
            .mobile-header {
                display: none;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.6rem;
            font-size: 0.85rem;
            color: var(--primary-400);
        }
        .breadcrumb a {
            color: var(--primary-500);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent-600);
        }
        .breadcrumb .sep {
            color: var(--primary-300);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--primary-700);
            font-weight: 600;
        }

        /* ===== 流程步骤 ===== */
        .step-card {
            position: relative;
            padding: 2rem 1.5rem;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            text-align: center;
        }
        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .step-number {
            width: 3rem;
            height: 3rem;
            border-radius: 9999px;
            background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
            color: var(--primary-950);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem auto;
            box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        @media (max-width: 768px) {
            .media-block {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }

        /* ===== 列表装饰 ===== */
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.5rem 0;
        }
        .check-list li i {
            color: var(--accent-500);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid #eef1f7;
            padding: 1.25rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary-900);
            cursor: pointer;
            padding: 0.25rem 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-700);
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--primary-400);
            transition: var(--transition);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: #4a5a72;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.75rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }

        /* ===== 动画 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .anim-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .anim-delay-1 {
            animation-delay: 0.1s;
        }
        .anim-delay-2 {
            animation-delay: 0.2s;
        }
        .anim-delay-3 {
            animation-delay: 0.3s;
        }
        .anim-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== 滚动栏 ===== */
        .scrollbar-thin::-webkit-scrollbar {
            width: 4px;
        }
        .scrollbar-thin::-webkit-scrollbar-track {
            background: transparent;
        }
        .scrollbar-thin::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }

        /* ===== 额外实用 ===== */
        .text-balance {
            text-wrap: balance;
        }
        .bg-gradient-soft {
            background: linear-gradient(135deg, #f8f9fc 0%, #eef1f7 100%);
        }
        .bg-grid {
            background-image: radial-gradient(rgba(11, 15, 26, 0.04) 1px, transparent 1px);
            background-size: 24px 24px;
        }