/* roulang page: index */
/* ===== CSS Design System ===== */
        :root {
            --primary: #8B5CF6;
            --primary-light: #A78BFA;
            --primary-dark: #7C3AED;
            --secondary: #F59E0B;
            --secondary-light: #FBBF24;
            --accent: #EC4899;
            --bg-white: #FFFFFF;
            --bg-light: #F9F5FF;
            --bg-dark: #1E1B2E;
            --bg-card: #FFFFFF;
            --text-primary: #1F1A2E;
            --text-secondary: #4B4563;
            --text-muted: #8B85A6;
            --text-white: #FFFFFF;
            --border: #E8E2F5;
            --border-light: #F0ECF8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(139, 92, 246, 0.08);
            --shadow-md: 0 8px 28px rgba(139, 92, 246, 0.12);
            --shadow-lg: 0 16px 48px rgba(139, 92, 246, 0.18);
            --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 76px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
        }

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

        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 24px rgba(139, 92, 246, 0.08);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
        }

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

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }

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

        .nav-list a.active {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(139, 92, 246, 0.4);
            color: #fff !important;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        }

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

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px 28px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.4s ease, opacity 0.4s ease;
                box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                width: 100%;
                padding: 14px 18px;
                font-size: 16px;
                justify-content: center;
            }
            .nav-list a.active::after { display: none; }
            .nav-list a.active { background: var(--bg-light); border-radius: var(--radius-sm); }
            .nav-cta { margin-top: 8px; width: 100%; justify-content: center; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: linear-gradient(135deg, #1E1B2E 0%, #2D2A4A 50%, #1E1B2E 100%);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(139, 92, 246, 0.25) 0%, transparent 70%),
                        radial-gradient(ellipse at 70% 50%, rgba(236, 72, 153, 0.15) 0%, transparent 70%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(139, 92, 246, 0.2);
            border: 1px solid rgba(139, 92, 246, 0.3);
            border-radius: 50px;
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
            backdrop-filter: blur(8px);
            margin-bottom: 28px;
        }

        .hero-badge i { font-size: 12px; }

        .hero h1 {
            font-size: clamp(38px, 7vw, 72px);
            font-weight: 800;
            line-height: 1.12;
            letter-spacing: -1.5px;
            color: var(--text-white);
            margin-bottom: 20px;
        }

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

        .hero p {
            font-size: clamp(17px, 2vw, 22px);
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            max-width: 620px;
            margin: 0 auto 36px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-md);
            box-shadow: 0 8px 28px rgba(139, 92, 246, 0.35);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 40px rgba(139, 92, 246, 0.45);
            color: #fff;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: transparent;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            border: 2px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-md);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: center;
            color: #fff;
        }

        .hero-stat .num {
            font-size: 34px;
            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;
        }

        .hero-stat .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 2px;
        }

        @media (max-width: 768px) {
            .hero { padding: 100px 16px 60px; min-height: 90vh; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 28px; }
            .hero-actions .btn-primary, .hero-actions .btn-outline-light { width: 100%; justify-content: center; }
        }

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

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

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

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-header h2 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            letter-spacing: -0.8px;
            margin-bottom: 14px;
            line-height: 1.2;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-header.light h2 { color: var(--text-white); }
        .section-header.light p { color: rgba(255, 255, 255, 0.6); }

        .section-subtitle {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(139, 92, 246, 0.12);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }

        /* ===== Features / Core ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .feature-card .icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--bg-light), var(--border-light));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

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

        @media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Category Entry ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .category-card .card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }

        .category-card .card-body {
            padding: 24px 28px 28px;
        }

        .category-card .badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(139, 92, 246, 0.1);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 50px;
            margin-bottom: 10px;
        }

        .category-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .category-card .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .category-card .btn-text i { transition: transform var(--transition); }
        .category-card:hover .btn-text i { transform: translateX(4px); }

        @media (max-width: 768px) {
            .category-grid { grid-template-columns: 1fr; }
            .category-card .card-img { height: 180px; }
        }

        /* ===== News / Post List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .news-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }

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

        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-card .meta .tag {
            padding: 2px 12px;
            background: rgba(139, 92, 246, 0.08);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 500;
        }

        .news-card h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
        }

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

        .news-card .excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--bg-light);
            border-radius: var(--radius-lg);
        }

        @media (max-width: 1024px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .news-grid { grid-template-columns: 1fr; } }

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

        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: transform var(--transition), background var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.1);
        }

        .stat-card .num {
            font-size: 40px;
            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;
        }

        .stat-card .label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }

        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

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

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

        .faq-item:hover { box-shadow: var(--shadow-sm); }

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

        .faq-question i {
            font-size: 14px;
            color: var(--primary);
            transition: transform var(--transition);
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark), #2D2A4A);
            padding: 80px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 32px;
        }

        .cta-content .btn-primary {
            font-size: 17px;
            padding: 18px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 28px;
        }

        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .footer-brand {
            max-width: 300px;
        }

        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.7;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .footer-links .col h4 {
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-links .col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.35);
            padding: 4px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            max-width: var(--max-width);
            margin: 32px auto 0;
            padding: 20px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }

        .footer-bottom a { color: rgba(255, 255, 255, 0.3); }
        .footer-bottom a:hover { color: var(--primary-light); }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 15px;
            transition: background var(--transition), color var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

        @media (max-width: 768px) {
            .footer-inner { flex-direction: column; gap: 24px; }
            .footer-links { gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 6px 20px rgba(139, 92, 246, 0.3);
            z-index: 999;
            opacity: 0;
            transform: translateY(20px);
            transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .back-top:hover {
            box-shadow: 0 10px 32px rgba(139, 92, 246, 0.45);
            transform: translateY(-3px);
            color: #fff;
        }

        @media (max-width: 520px) {
            .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 16px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c3cf1;
            --primary-dark: #5228c9;
            --primary-light: #8b6cf7;
            --primary-gradient: linear-gradient(135deg, #6c3cf1 0%, #a855f7 100%);
            --primary-soft: #f3efff;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-body: #fafafe;
            --bg-white: #ffffff;
            --bg-light: #f4f1fe;
            --bg-dark: #0f0a1a;
            --bg-card: #ffffff;
            --text-primary: #1a0a3e;
            --text-body: #2d1b69;
            --text-muted: #7c6ba0;
            --text-white: #f8f7fc;
            --border-light: #e8e2f5;
            --border-card: #ede8f8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(108, 60, 241, 0.06);
            --shadow-md: 0 8px 30px rgba(108, 60, 241, 0.10);
            --shadow-lg: 0 20px 60px rgba(108, 60, 241, 0.15);
            --shadow-card: 0 4px 20px rgba(108, 60, 241, 0.07);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-body);
            background: var(--bg-body);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
        }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(18px) saturate(1.4);
            -webkit-backdrop-filter: blur(18px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 4px 30px rgba(108, 60, 241, 0.08);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -0.3px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: var(--primary-gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(108, 60, 241, 0.25);
        }
        .logo span {
            font-size: 20px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 50px;
            transition: background var(--transition), color var(--transition);
        }
        .nav-list a:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 6px;
            background: var(--primary-gradient);
        }
        .nav-list a.nav-cta {
            background: var(--primary-gradient);
            color: #fff !important;
            padding: 10px 24px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(108, 60, 241, 0.25);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 60, 241, 0.35);
        }
        .nav-list a.nav-cta::after {
            display: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: var(--radius-sm);
            background: var(--primary-soft);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-area {
            padding-top: calc(var(--header-h) + 28px);
            padding-bottom: 12px;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-area .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-area a {
            color: var(--text-muted);
        }
        .breadcrumb-area a:hover {
            color: var(--primary);
        }
        .breadcrumb-area .sep {
            color: var(--border-light);
            font-weight: 300;
        }
        .breadcrumb-area .current {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ===== Hero / Page Banner ===== */
        .page-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 10, 26, 0.88) 0%, rgba(108, 60, 241, 0.70) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-white);
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 8px 28px rgba(108, 60, 241, 0.30);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(108, 60, 241, 0.40);
            color: #fff;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.30);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-title .badge-label {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 功能分类卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .feature-card .tag {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-num {
            counter-increment: step;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 20px rgba(108, 60, 241, 0.25);
        }
        .step-card .step-num::before {
            content: counter(step);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 平台优势 / 数据块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
            transition: transform var(--transition), background var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.10);
        }
        .stat-item .num {
            font-size: 42px;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
        }

        /* ===== 图文区块 ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-block.reverse {
            direction: rtl;
        }
        .split-block.reverse>* {
            direction: ltr;
        }
        .split-block .text h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .split-block .text p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .split-block .text .list-check {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 16px;
        }
        .split-block .text .list-check li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-body);
        }
        .split-block .text .list-check li i {
            color: var(--primary);
            font-size: 16px;
            width: 20px;
        }
        .split-block .media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .split-block .media img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-soft);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 14px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-block {
            text-align: center;
            padding: 64px 40px;
            background: var(--primary-gradient);
            border-radius: var(--radius-xl);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-block h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .cta-block p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 12px auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.20);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.4fr 2fr;
            gap: 48px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .footer-links .col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-links .col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links .col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 40px auto 0;
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.60);
            font-size: 16px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-block.reverse {
                direction: ltr;
            }
            .split-block .media img {
                height: 280px;
            }
            .page-hero h1 {
                font-size: 38px;
            }
            .section-title h2 {
                font-size: 28px;
            }
            .cta-block h2 {
                font-size: 28px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.35s ease;
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 16px;
            }
            .nav-list a.active::after {
                bottom: 4px;
            }
            .nav-list a.nav-cta {
                margin-top: 8px;
            }
            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 80px 0 60px;
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }
            .section-title {
                margin-bottom: 36px;
            }
            .section-title h2 {
                font-size: 24px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .num {
                font-size: 34px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .breadcrumb-area {
                padding-top: calc(var(--header-h) + 16px);
                padding-bottom: 8px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 16px;
            }
            .logo span {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-outline-light {
                width: 100%;
                justify-content: center;
                max-width: 280px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .split-block .media img {
                height: 200px;
            }
            .section-title h2 {
                font-size: 22px;
            }
            .cta-block h2 {
                font-size: 22px;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6D28D9;
            --primary-dark: #4C1D95;
            --primary-light: #8B5CF6;
            --primary-bg: #F5F0FF;
            --accent: #F5A623;
            --accent-dark: #D48A0E;
            --accent-light: #FFD166;
            --bg: #FAFAFE;
            --bg-card: #FFFFFF;
            --bg-dark: #1A0A2E;
            --text: #1A0A2E;
            --text-light: #6B5B7B;
            --text-lighter: #9A8AA8;
            --border: #E8E0F0;
            --shadow: 0 4px 24px rgba(109, 40, 217, 0.08);
            --shadow-hover: 0 8px 40px rgba(109, 40, 217, 0.16);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --content-width: 740px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.25rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .content-container {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(109, 40, 217, 0.15);
        }
        .badge-accent {
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-dark);
            border-color: rgba(245, 166, 35, 0.2);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(109, 40, 217, 0.3);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-accent {
            background: var(--accent);
            color: #1A0A2E;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(109, 40, 217, 0.2);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(109, 40, 217, 0.1);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Header / Nav (极简高端文字导航) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(232, 224, 240, 0.6);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 1px 20px rgba(109, 40, 217, 0.06);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--text);
            text-decoration: none;
        }
        .logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            box-shadow: 0 2px 12px rgba(109, 40, 217, 0.25);
        }
        .logo span {
            color: var(--text);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-list a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-bg);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            border: 2px solid var(--primary);
        }
        .nav-list a.nav-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(109, 40, 217, 0.3);
        }
        .nav-list a.nav-cta.active {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }
        .nav-list a.nav-cta.active::after {
            display: none;
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, rgba(109, 40, 217, 0.06) 0%, rgba(245, 166, 35, 0.04) 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .article-hero .hero-glow {
            position: absolute;
            top: -20%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(109, 40, 217, 0.12), transparent 70%);
            pointer-events: none;
        }
        .article-hero .hero-glow-2 {
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 166, 35, 0.08), transparent 70%);
            pointer-events: none;
        }
        .article-hero .content-container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-lighter);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }
        .article-hero .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .article-hero .breadcrumb span {
            color: var(--text-lighter);
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text);
            max-width: 800px;
            margin: 0 auto 20px;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            color: var(--primary-light);
            font-size: 0.85rem;
        }
        .article-hero .meta .badge {
            font-size: 0.8rem;
        }

        /* ===== Article Content ===== */
        .article-body {
            padding: 60px 0 40px;
        }
        .article-body .content-container {
            max-width: var(--content-width);
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.5rem;
            color: var(--text-light);
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .article-content h2 {
            font-size: 1.6rem;
        }
        .article-content h3 {
            font-size: 1.3rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
            color: var(--text-light);
        }
        .article-content ul {
            list-style: disc;
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .article-content img {
            border-radius: var(--radius);
            margin: 2rem auto;
            box-shadow: var(--shadow);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 3rem;
            color: var(--text-lighter);
            margin-bottom: 20px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--text);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }

        /* ===== Article Footer (Tags & Share) ===== */
        .article-footer-bar {
            padding: 32px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-top: 40px;
        }
        .article-footer-bar .content-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .article-tags span {
            font-weight: 600;
            color: var(--text);
            font-size: 0.95rem;
        }
        .article-tags .tag {
            font-size: 0.85rem;
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .article-share span {
            font-weight: 600;
            color: var(--text);
            font-size: 0.95rem;
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(109, 40, 217, 0.25);
        }

        /* ===== Post Navigation ===== */
        .post-navigation {
            padding: 40px 0;
        }
        .post-navigation .content-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .post-navigation .nav-item {
            padding: 20px 24px;
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .post-navigation .nav-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .post-navigation .nav-item .label {
            font-size: 0.8rem;
            color: var(--text-lighter);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            font-weight: 600;
        }
        .post-navigation .nav-item .title {
            font-weight: 600;
            color: var(--text);
            font-size: 1rem;
            line-height: 1.4;
        }
        .post-navigation .nav-item.next {
            text-align: right;
        }

        /* ===== Related Posts ===== */
        .related-posts {
            padding: 60px 0;
            background: var(--primary-bg);
        }
        .related-posts .section-title h2 {
            font-size: 1.8rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .related-card .card-img {
            height: 180px;
            background: var(--primary-bg);
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body .badge {
            align-self: flex-start;
            margin-bottom: 10px;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.35;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 12px;
            flex: 1;
        }
        .related-card .card-body .card-link {
            font-weight: 600;
            color: var(--primary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-body .card-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .faq-section .section-title h2 {
            font-size: 1.8rem;
        }
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-item .faq-question:hover {
            background: var(--primary-bg);
        }
        .faq-item .faq-question i {
            color: var(--primary-light);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.05;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-accent {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-section .btn-accent:hover {
            background: var(--accent);
            color: #1A0A2E;
            border-color: var(--accent);
        }
        .cta-section .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.5fr 2fr;
            gap: 60px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .footer-links .col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-links .col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-links .col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 24px 24px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #1A0A2E;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .article-hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            section {
                padding: 50px 0;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                pointer-events: none;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 14px 18px;
                font-size: 1.05rem;
                border-radius: 10px;
                width: 100%;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
            .header-inner {
                height: 64px;
            }
            .article-hero {
                padding: 110px 0 40px;
                min-height: auto;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-hero .meta {
                font-size: 0.85rem;
                gap: 12px;
            }
            .article-body {
                padding: 40px 0 20px;
            }
            .article-content {
                font-size: 1rem;
                line-height: 1.8;
            }
            .post-navigation .content-container {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .post-navigation .nav-item.next {
                text-align: left;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-card .card-img {
                height: 160px;
            }
            .article-footer-bar .content-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .container,
            .content-container,
            .header-inner,
            .footer-inner,
            .footer-bottom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .meta {
                flex-direction: column;
                gap: 8px;
            }
            .article-content {
                font-size: 0.95rem;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .cta-buttons {
                flex-direction: column;
                gap: 12px;
            }
            .cta-buttons .btn {
                width: 100%;
                justify-content: center;
            }
        }