/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3cf1;
            --primary-light: #8b5cf6;
            --primary-dark: #4f2db8;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #ec4899;
            --accent-light: #f472b6;
            --bg-dark: #0b0e1a;
            --bg-card: #13182b;
            --bg-section: #0f1424;
            --bg-input: #1a2038;
            --text-white: #f1f5f9;
            --text-light: #cbd5e1;
            --text-muted: #6b7280;
            --border-color: #1e2a4a;
            --border-light: #2a3a5e;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 20px rgba(108,60,241,0.3);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3.5rem;
            --spacing-xl: 6rem;
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        /* ===== 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: 1.7;
            color: var(--text-light);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        button, input, textarea, select { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        
        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        @media (min-width: 768px) { .container { padding: 0 var(--spacing-md); } }
        @media (min-width: 1024px) { .container { padding: 0 2rem; } }
        
        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition), border-color var(--transition);
        }
        .site-header.scrolled { background: rgba(11, 14, 26, 0.98); border-color: var(--primary-dark); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo a {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo a i { font-size: 1.5rem; -webkit-text-fill-color: initial; color: var(--secondary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-list li a {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list li a:hover { color: var(--text-white); background: rgba(108,60,241,0.12); }
        .nav-list li a.active {
            color: var(--text-white);
            background: rgba(108,60,241,0.2);
        }
        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .nav-cta a {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: var(--text-white) !important;
            padding: 0.5rem 1.5rem !important;
            border-radius: var(--radius-xl) !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(108,60,241,0.35);
        }
        .nav-cta a:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(108,60,241,0.5); }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.25rem;
        }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-list {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(11, 14, 26, 0.98);
                backdrop-filter: blur(14px);
                border-bottom: 1px solid var(--border-color);
                padding: 1rem 0;
                gap: 0;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list li { width: 100%; text-align: center; }
            .nav-list li a { display: block; padding: 0.8rem 1rem; }
            .nav-list li a.active::after { display: none; }
            .nav-cta a { margin: 0.5rem 1rem; }
        }
        
        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 7rem 0 4rem;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(108,60,241,0.15) 0%, transparent 70%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 0 var(--spacing-sm);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(108,60,241,0.18);
            border: 1px solid rgba(108,60,241,0.3);
            padding: 0.4rem 1.2rem;
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            color: var(--primary-light);
            margin-bottom: 1.5rem;
            letter-spacing: 0.3px;
        }
        .hero-badge i { color: var(--secondary); }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-white);
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }
        .hero h1 span { background: linear-gradient(135deg, var(--secondary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 2rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: var(--text-white); box-shadow: 0 4px 20px rgba(108,60,241,0.4); }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(108,60,241,0.55); color: var(--text-white); }
        .btn-secondary { background: rgba(255,255,255,0.08); color: var(--text-white); border: 1px solid var(--border-light); backdrop-filter: blur(4px); }
        .btn-secondary:hover { background: rgba(255,255,255,0.14); border-color: var(--primary-light); transform: translateY(-3px); color: var(--text-white); }
        .btn-sm { padding: 0.55rem 1.4rem; font-size: 0.9rem; }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: center;
            margin-top: 3rem;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 1.8rem; font-weight: 800; color: var(--text-white); }
        .hero-stat .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.2rem; }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 1.2rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-actions .btn { width: 100%; justify-content: center; }
        }
        
        /* ===== 板块通用 ===== */
        .section { padding: var(--spacing-xl) 0; }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            letter-spacing: -0.3px;
        }
        .section-title h2 i { color: var(--secondary); margin-right: 0.4rem; }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .section-dark { background: var(--bg-section); }
        .section-card { background: var(--bg-card); }
        @media (max-width: 768px) {
            .section { padding: var(--spacing-lg) 0; }
            .section-title h2 { font-size: 1.7rem; }
        }
        
        /* ===== 核心说明板块 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-md);
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(45deg, rgba(108,60,241,0.2), transparent);
            pointer-events: none;
        }
        .intro-text h3 { font-size: 1.8rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; }
        .intro-text h3 span { color: var(--secondary); }
        .intro-text p { margin-bottom: 1.2rem; color: var(--text-light); line-height: 1.8; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; margin-top: 1.5rem; }
        .intro-features li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .intro-features li i { color: var(--secondary); font-size: 1rem; }
        @media (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; }
            .intro-image { order: -1; }
            .intro-text h3 { font-size: 1.4rem; }
            .intro-features { grid-template-columns: 1fr; }
        }
        
        /* ===== 分类卡片入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--spacing-md);
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            text-align: center;
        }
        .category-card:hover { border-color: var(--primary); transform: translateY(-6px); box-shadow: var(--shadow-glow); }
        .category-card .icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 1.2rem;
            background: rgba(108,60,241,0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary-light);
        }
        .category-card h4 { font-size: 1.15rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.5rem; }
        .category-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 1rem; }
        .category-card .tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            background: rgba(245,158,11,0.12);
            color: var(--secondary);
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        /* ===== 内容 / 资讯列表 ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .post-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
        .post-card .thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .post-card .body { padding: 1.2rem 1.4rem 1.4rem; }
        .post-card .cat {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            background: rgba(108,60,241,0.12);
            color: var(--primary-light);
            border-radius: var(--radius-xl);
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
        }
        .post-card h4 { font-size: 1.05rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.5rem; line-height: 1.4; }
        .post-card h4 a { color: var(--text-white); }
        .post-card h4 a:hover { color: var(--primary-light); }
        .post-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 0.8rem; }
        .post-card .meta { display: flex; align-items: center; gap: 1rem; font-size: 0.8rem; color: var(--text-muted); }
        .post-card .meta i { margin-right: 0.25rem; }
        .empty-msg {
            text-align: center;
            padding: 2rem 1rem;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        
        /* ===== 数据 / 流程板块 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--spacing-md);
            position: relative;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
        }
        .step-card .step-num {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: var(--text-white);
            margin: 0 auto 1rem;
            font-size: 1.2rem;
        }
        .step-card h5 { font-size: 1.05rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.4rem; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        .step-card::after {
            content: '→';
            position: absolute;
            right: -1.2rem;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.8rem;
            color: var(--primary);
            opacity: 0.4;
        }
        .step-card:last-child::after { display: none; }
        @media (max-width: 768px) { .step-card::after { display: none; } }
        
        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            padding: 1.2rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-white);
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question i { color: var(--primary-light); transition: transform var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }
        
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-card), var(--bg-section));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            text-align: center;
            padding: var(--spacing-lg) 0;
        }
        .cta-box h2 { font-size: 2rem; font-weight: 800; color: var(--text-white); margin-bottom: 0.8rem; }
        .cta-box p { color: var(--text-muted); max-width: 560px; margin: 0 auto 2rem; font-size: 1.05rem; }
        .cta-box .btn-group { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
        
        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
        }
        .footer-brand .logo a { font-size: 1.2rem; }
        .footer-brand p { margin-top: 0.8rem; font-size: 0.9rem; color: var(--text-muted); max-width: 320px; line-height: 1.7; }
        .footer-col h5 { font-size: 0.95rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; }
        .footer-col ul li a { font-size: 0.9rem; color: var(--text-muted); padding: 0.25rem 0; display: inline-block; }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: var(--spacing-sm);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.8rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { margin: 0.8rem auto 0; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        
        /* ===== 辅助 ===== */
        .text-gradient { background: linear-gradient(135deg, var(--secondary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .mb-1 { margin-bottom: var(--spacing-sm); }
        .mb-2 { margin-bottom: var(--spacing-md); }
        .mt-2 { margin-top: var(--spacing-md); }
        .gap-1 { gap: var(--spacing-sm); }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c3cf0;
            --primary-dark: #5228d0;
            --primary-light: #8b6cf7;
            --secondary: #f0b53c;
            --secondary-dark: #d99a2a;
            --accent: #ff6b9d;
            --bg-dark: #0b0a1a;
            --bg-card: #13112b;
            --bg-card-hover: #1c1940;
            --bg-section: #0f0e22;
            --bg-input: #1a1735;
            --text-primary: #f0edff;
            --text-secondary: #b8b0e0;
            --text-muted: #7a7299;
            --border-color: #2a2555;
            --border-glow: rgba(108, 60, 240, 0.3);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(108, 60, 240, 0.08);
            --shadow-hover: 0 16px 48px rgba(108, 60, 240, 0.18), 0 0 0 1px rgba(108, 60, 240, 0.2);
            --shadow-glow: 0 0 40px rgba(108, 60, 240, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
        }

        /* ===== 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: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 10, 26, 0.85);
            backdrop-filter: blur(18px) saturate(1.4);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            height: 72px;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary-light);
            font-size: 1.7rem;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .logo a {
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover { color: var(--primary-light); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list li a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-list li a:hover::after,
        .nav-list li a.active::after { width: 100%; }
        .nav-list li a:hover { color: var(--text-primary); }
        .nav-list li a.active { color: var(--text-primary); }
        .nav-cta a {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px rgba(108, 60, 240, 0.3);
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .nav-cta a i { font-size: 0.8rem; }
        .nav-cta a:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(108, 60, 240, 0.45);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .nav-cta a::after { display: none !important; }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            width: 28px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Hero / Banner ===== */
        .article-banner {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, rgba(11,10,26,0.92), rgba(15,14,34,0.85)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--primary-light); }
        .article-breadcrumb a:hover { color: var(--secondary); }
        .article-breadcrumb span { color: var(--text-muted); }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            max-width: 900px;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta i { margin-right: 6px; color: var(--primary-light); }
        .article-meta .category-badge {
            background: rgba(108, 60, 240, 0.2);
            color: var(--primary-light);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(108, 60, 240, 0.2);
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--shadow-card);
        }
        .article-main .featured-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 32px;
        }
        .article-main .featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body h2, .article-body h3 {
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .article-body h2 { font-size: 1.6rem; }
        .article-body h3 { font-size: 1.25rem; }
        .article-body p { margin-bottom: 1.2rem; }
        .article-body ul, .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            list-style: disc;
            color: var(--text-secondary);
        }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5rem; }
        .article-body a { color: var(--primary-light); text-decoration: underline; }
        .article-body a:hover { color: var(--secondary); }
        .article-body blockquote {
            border-left: 4px solid var(--primary-light);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(108, 60, 240, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }
        .article-body code {
            background: rgba(108, 60, 240, 0.12);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
        }
        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .article-tags .tag {
            background: rgba(108, 60, 240, 0.1);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            border: 1px solid rgba(108, 60, 240, 0.15);
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: rgba(108, 60, 240, 0.2); transform: translateY(-1px); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .article-share span { font-size: 0.85rem; color: var(--text-muted); }
        .article-share a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-input);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h4 i { color: var(--primary-light); }
        .sidebar-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(42, 37, 85, 0.4);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list li a {
            color: var(--text-secondary);
            font-size: 0.92rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            transition: var(--transition);
        }
        .sidebar-list li a:hover { color: var(--text-primary); }
        .sidebar-list li a i {
            color: var(--primary-light);
            font-size: 0.7rem;
            margin-top: 6px;
            flex-shrink: 0;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, rgba(108,60,240,0.12), rgba(255,107,157,0.06));
            border: 1px solid rgba(108,60,240,0.2);
            text-align: center;
        }
        .sidebar-cta h4 { justify-content: center; }
        .sidebar-cta p { font-size: 0.9rem; margin-bottom: 20px; }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(108, 60, 240, 0.3);
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .sidebar-cta .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(108,60,240,0.45); }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 0 0 80px;
        }
        .related-section h2 {
            font-size: 1.8rem;
            margin-bottom: 36px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section h2 i { color: var(--primary-light); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(108,60,240,0.2); }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .related-card .card-body h4 a { color: var(--text-primary); }
        .related-card .card-body h4 a:hover { color: var(--primary-light); }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .card-meta .cat { color: var(--primary-light); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box h2 { margin-bottom: 16px; }
        .not-found-box p { margin-bottom: 24px; }
        .not-found-box .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(108,60,240,0.4); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 420px;
            line-height: 1.7;
        }
        .footer-col h5 {
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--primary-light); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-list {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(11, 10, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 32px 24px;
                gap: 20px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: 0 32px 64px rgba(0,0,0,0.6);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-list li a { font-size: 1.1rem; }
            .nav-cta a { justify-content: center; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-main { padding: 24px; }
            .article-layout { gap: 32px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-banner { padding: 120px 0 40px; }
            .article-section { padding: 40px 0 60px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-meta { gap: 16px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-main { padding: 16px; }
            .article-banner h1 { font-size: 1.4rem; }
            .related-card img { height: 160px; }
            .article-breadcrumb { font-size: 0.75rem; }
            .article-body { font-size: 0.95rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #00d4ff;
            --color-primary-dark: #009bb5;
            --color-primary-light: #66e5ff;
            --color-secondary: #7c3aed;
            --color-secondary-light: #a855f7;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #0a0e27;
            --color-bg-alt: #111827;
            --color-bg-card: rgba(30, 41, 59, 0.85);
            --color-bg-card-hover: rgba(40, 55, 80, 0.95);
            --color-text: #f8fafc;
            --color-text-muted: #94a3b8;
            --color-text-dim: #64748b;
            --color-border: rgba(0, 212, 255, 0.2);
            --color-border-hover: rgba(0, 212, 255, 0.5);
            --color-glow: rgba(0, 212, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px var(--color-glow);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text);
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.8rem, 4.5vw, 2.8rem);
        }
        h3 {
            font-size: clamp(1.3rem, 3vw, 1.75rem);
        }
        h4 {
            font-size: clamp(1.1rem, 2vw, 1.35rem);
        }
        p {
            color: var(--color-text-muted);
            max-width: 70ch;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            margin: 0 auto;
            font-size: 1.1rem;
            max-width: 640px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.1);
            padding: 4px 16px;
            border-radius: 100px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            margin-bottom: 16px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 14, 39, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.08);
            transition: background var(--transition), border-color var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.02em;
            transition: color var(--transition);
        }
        .logo a i {
            color: var(--color-primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.3));
        }
        .logo a:hover {
            color: var(--color-primary-light);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-list>li>a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list>li>a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-list>li>a.active {
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.08);
            box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.15);
        }
        .nav-list .nav-cta a {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
            color: #fff !important;
            padding: 8px 24px;
            border-radius: 100px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
            transition: all var(--transition);
        }
        .nav-list .nav-cta a:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
        }
        .nav-list .nav-cta a i {
            font-size: 0.85rem;
            transition: transform var(--transition);
        }
        .nav-list .nav-cta a:hover i {
            transform: translateX(4px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-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);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(10, 14, 39, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 20px 24px 32px;
                gap: 4px;
                border-bottom: 1px solid rgba(0, 212, 255, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
                box-shadow: var(--shadow-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list>li>a {
                width: 100%;
                padding: 12px 20px;
                font-size: 1rem;
            }
            .nav-list .nav-cta {
                margin-top: 12px;
                width: 100%;
            }
            .nav-list .nav-cta a {
                width: 100%;
                justify-content: center;
                padding: 12px 24px;
            }
        }

        /* ===== Hero ===== */
        .hero-category {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 80px;
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 39, 0.92) 30%, rgba(10, 14, 39, 0.6) 70%, rgba(0, 212, 255, 0.15) 100%);
            z-index: 0;
        }
        .hero-category .container {
            position: relative;
            z-index: 1;
        }
        .hero-category .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.1);
            padding: 6px 20px;
            border-radius: 100px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero-category .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-category h1 {
            font-size: clamp(2.4rem, 7vw, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #f8fafc 40%, var(--color-primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category p {
            font-size: 1.15rem;
            max-width: 620px;
            margin-bottom: 32px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        .hero-category .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 100px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
            border: none;
            box-shadow: 0 4px 24px rgba(0, 212, 255, 0.25);
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 40px rgba(0, 212, 255, 0.35);
            color: #fff;
        }
        .btn-primary i {
            font-size: 0.9rem;
            transition: transform var(--transition);
        }
        .btn-primary:hover i {
            transform: translateX(4px);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: 100px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition);
            cursor: pointer;
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--color-text);
            transform: translateY(-2px);
        }
        .btn-secondary i {
            color: var(--color-primary);
        }

        @media (max-width: 768px) {
            .hero-category {
                min-height: 400px;
                padding-top: calc(var(--header-height) + 24px);
                padding-bottom: 56px;
            }
            .hero-category h1 {
                font-size: clamp(1.8rem, 8vw, 2.6rem);
            }
            .hero-category p {
                font-size: 1rem;
            }
            .hero-category .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-category .hero-actions .btn-primary,
            .hero-category .hero-actions .btn-secondary {
                justify-content: center;
            }
        }

        /* ===== Features Section ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
            background: var(--color-bg-card-hover);
        }
        .feature-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-primary);
            margin-bottom: 20px;
            border: 1px solid rgba(0, 212, 255, 0.1);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--color-text-dim);
            max-width: 100%;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== Steps / Guide Section ===== */
        .steps-section {
            background: var(--color-bg-alt);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--color-border);
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-card .step-num {
            counter-increment: step;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin: 0 auto 18px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }
        .step-card .step-num::after {
            content: counter(step);
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-dim);
            max-width: 100%;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 24px 18px;
            }
        }

        /* ===== Games / Cards Grid ===== */
        .games-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .game-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .game-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
        }
        .game-card .game-img {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .game-card .game-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .game-card:hover .game-img img {
            transform: scale(1.05);
        }
        .game-card .game-img .game-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 14, 39, 0.8) 0%, transparent 60%);
            opacity: 0;
            transition: opacity var(--transition);
            display: flex;
            align-items: flex-end;
            padding: 20px;
        }
        .game-card:hover .game-img .game-overlay {
            opacity: 1;
        }
        .game-card .game-img .game-overlay .tag {
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 100px;
            background: rgba(0, 212, 255, 0.15);
            color: var(--color-primary);
            border: 1px solid rgba(0, 212, 255, 0.2);
            backdrop-filter: blur(4px);
        }
        .game-card .game-body {
            padding: 22px 24px 24px;
        }
        .game-card .game-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .game-card .game-body p {
            font-size: 0.9rem;
            color: var(--color-text-dim);
            max-width: 100%;
            margin-bottom: 16px;
        }
        .game-card .game-body .game-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--color-text-dim);
        }
        .game-card .game-body .game-meta i {
            color: var(--color-primary);
            width: 16px;
            margin-right: 4px;
        }
        @media (max-width: 1024px) {
            .games-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .games-grid {
                grid-template-columns: 1fr;
            }
            .game-card .game-body {
                padding: 18px 18px 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-bg-alt);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border-hover);
        }
        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text);
            background: none;
            border: none;
            text-align: left;
            cursor: pointer;
            gap: 16px;
            transition: color var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--color-primary-light);
        }
        .faq-item .faq-question i {
            font-size: 0.85rem;
            color: var(--color-primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--color-text-dim);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        @media (max-width: 640px) {
            .faq-item .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 39, 0.92) 40%, rgba(0, 212, 255, 0.2) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            font-size: clamp(1.8rem, 5vw, 2.8rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            margin: 0 auto 32px;
            font-size: 1.1rem;
            max-width: 560px;
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 100px;
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            box-shadow: 0 4px 24px rgba(245, 158, 11, 0.3);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-cta:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 40px rgba(245, 158, 11, 0.4);
            color: #fff;
        }
        .btn-cta i {
            font-size: 0.9rem;
            transition: transform var(--transition);
        }
        .btn-cta:hover i {
            transform: translateX(4px);
        }
        @media (max-width: 640px) {
            .cta-section .container {
                padding: 56px 16px;
            }
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-section .cta-actions .btn-cta {
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-alt);
            border-top: 1px solid rgba(0, 212, 255, 0.06);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo a {
            font-size: 1.25rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer-brand .logo a i {
            color: var(--color-primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--color-text-dim);
            margin-top: 12px;
            max-width: 360px;
            line-height: 1.8;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--color-text-dim);
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 0.85rem;
            color: var(--color-text-dim);
        }
        .footer-bottom a {
            color: var(--color-primary);
        }
        .footer-bottom a:hover {
            color: var(--color-primary-light);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utilities ===== */
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Fade-in animation ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.6s ease forwards;
        }
        .fade-in:nth-child(2) {
            animation-delay: 0.1s;
        }
        .fade-in:nth-child(3) {
            animation-delay: 0.2s;
        }
        .fade-in:nth-child(4) {
            animation-delay: 0.3s;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 24px rgba(0, 212, 255, 0.25);
            border: none;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 36px rgba(0, 212, 255, 0.35);
        }
        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }