/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --bg-primary: #0a0e1a;
            --bg-secondary: #111627;
            --bg-card: #161c30;
            --bg-elevated: #1c2340;
            --bg-input: #0f1423;
            --border-color: #2a3350;
            --border-light: #3a4568;
            --neon-primary: #6c5ce7;
            --neon-secondary: #00d4ff;
            --neon-accent: #ff6b9d;
            --neon-glow: rgba(108, 92, 231, 0.35);
            --neon-glow-cyan: rgba(0, 212, 255, 0.3);
            --text-primary: #f0f4ff;
            --text-secondary: #b8c8e8;
            --text-muted: #7a8aaa;
            --text-dark: #d0d8e8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(108, 92, 231, 0.08);
            --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.2);
            --shadow-cyan-glow: 0 0 30px rgba(0, 212, 255, 0.15);
            --transition: 0.3s 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);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }
        a {
            color: var(--neon-secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--neon-primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--neon-primary);
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(20px) saturate(1.3);
            border-bottom: 1px solid rgba(108, 92, 231, 0.15);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 1px;
            position: relative;
        }
        .header-logo i {
            color: var(--neon-primary);
            font-size: 26px;
            filter: drop-shadow(0 0 8px var(--neon-glow));
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-logo:hover {
            opacity: 0.9;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-list a i {
            font-size: 14px;
            opacity: 0.7;
        }
        .nav-list a:hover {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.1);
        }
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(108, 92, 231, 0.18);
            box-shadow: inset 0 -2px 0 var(--neon-primary), 0 0 20px rgba(108, 92, 231, 0.1);
        }
        .nav-list a.active i {
            color: var(--neon-primary);
            opacity: 1;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--neon-primary), #8b5cf6) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.25);
            transition: var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 35px rgba(108, 92, 231, 0.4) !important;
        }
        .nav-cta i {
            color: #fff !important;
            opacity: 1 !important;
        }

        /* 汉堡按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: transparent;
            border: none;
            border-radius: 6px;
            transition: var(--transition);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger:hover span {
            background: var(--neon-primary);
        }

        /* 移动端导航 */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(10, 14, 26, 0.97);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(108, 92, 231, 0.15);
            padding: 18px 24px 28px;
            z-index: 999;
            flex-direction: column;
            gap: 6px;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-nav a i {
            width: 22px;
            text-align: center;
            color: var(--neon-primary);
        }
        .mobile-nav a:hover {
            background: rgba(108, 92, 231, 0.1);
            color: var(--text-primary);
        }
        .mobile-nav a.active {
            background: rgba(108, 92, 231, 0.18);
            color: var(--text-primary);
            border-left: 3px solid var(--neon-primary);
        }
        .mobile-nav .nav-cta-mobile {
            background: linear-gradient(135deg, var(--neon-primary), #8b5cf6);
            color: #fff !important;
            justify-content: center;
            margin-top: 8px;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero {
            padding-top: calc(var(--header-h) + 20px);
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--bg-primary);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
            mask-image: linear-gradient(to bottom, #000 50%, transparent 95%);
            -webkit-mask-image: linear-gradient(to bottom, #000 50%, transparent 95%);
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse 70% 60% at 50% 30%, rgba(108, 92, 231, 0.12), transparent 70%);
            z-index: 0;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            padding-top: 30px;
            padding-bottom: 60px;
        }
        .hero-content h1 {
            font-size: clamp(34px, 5.2vw, 60px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .hero-content p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--neon-primary), #8b5cf6);
            color: #fff;
            box-shadow: 0 0 30px rgba(108, 92, 231, 0.3);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 50px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: var(--text-primary);
            border: 1.5px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover {
            border-color: var(--neon-primary);
            color: var(--neon-primary);
            box-shadow: 0 0 25px rgba(108, 92, 231, 0.1);
            transform: translateY(-2px);
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card), var(--shadow-glow);
            max-height: 480px;
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .hero-badge {
            position: absolute;
            bottom: -10px;
            left: -10px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 14px 22px;
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hero-badge i {
            font-size: 28px;
            color: var(--neon-secondary);
            filter: drop-shadow(0 0 10px var(--neon-glow-cyan));
        }
        .hero-badge .badge-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .hero-badge .badge-sub {
            font-size: 12px;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 30px;
            }
            .hero-content p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual img {
                max-height: 360px;
            }
            .hero-badge {
                left: 50%;
                transform: translateX(-50%);
                bottom: -10px;
            }
        }
        @media (max-width: 520px) {
            .hero {
                min-height: 80vh;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
            }
            .hero-badge {
                padding: 10px 16px;
                position: relative;
                bottom: auto;
                left: auto;
                transform: none;
                margin-top: 16px;
                width: fit-content;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 14px;
        }
        .section-header h2 i {
            color: var(--neon-primary);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-primary), var(--neon-secondary));
            border-radius: 4px;
            margin: 14px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== 核心说明 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-text h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .intro-text p {
            color: var(--text-secondary);
            margin-bottom: 18px;
            font-size: 16px;
            line-height: 1.8;
        }
        .intro-text .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(108, 92, 231, 0.12);
            color: var(--neon-secondary);
            border: 1px solid rgba(108, 92, 231, 0.2);
        }
        .tag i {
            font-size: 12px;
        }
        .intro-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            width: 100%;
            aspect-ratio: 5/4;
            object-fit: cover;
        }
        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .intro-text h3 {
                font-size: 24px;
            }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 24px;
        }
        .category-card {
            position: relative;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px 24px 32px;
            transition: var(--transition);
            overflow: hidden;
            cursor: pointer;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-primary), var(--neon-secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.35);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card .icon-wrap {
            width: 54px;
            height: 54px;
            border-radius: var(--radius-sm);
            background: rgba(108, 92, 231, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--neon-primary);
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .category-card:hover .icon-wrap {
            background: rgba(108, 92, 231, 0.22);
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.15);
        }
        .category-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }
        .category-card .card-link {
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--neon-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .category-card:hover .card-link {
            gap: 12px;
            color: var(--neon-primary);
        }
        @media (max-width: 520px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 最新资讯 / CMS 列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: var(--shadow-card);
        }
        .news-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .news-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card .card-meta .cat {
            background: rgba(0, 212, 255, 0.12);
            color: var(--neon-secondary);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        .news-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-body h3 a {
            color: var(--text-primary);
        }
        .news-card .card-body h3 a:hover {
            color: var(--neon-secondary);
        }
        .news-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .news-card .card-body .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--neon-primary);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            margin-top: auto;
        }
        .news-card .card-body .read-more:hover {
            gap: 12px;
            color: var(--neon-secondary);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 50px 20px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .news-empty i {
            font-size: 40px;
            color: var(--border-light);
            margin-bottom: 16px;
            display: block;
        }
        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据 / 流程 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .stat-card .number {
            font-size: clamp(32px, 3vw, 44px);
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }
        .stat-card i {
            font-size: 24px;
            color: var(--neon-primary);
            margin-bottom: 12px;
            display: block;
            opacity: 0.7;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 420px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 流程步骤 */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 20px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 32px 28px;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .step-card .step-num {
            font-size: 48px;
            font-weight: 800;
            color: rgba(108, 92, 231, 0.12);
            line-height: 1;
            margin-bottom: 4px;
            position: absolute;
            top: 16px;
            right: 22px;
            pointer-events: none;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .step-card .step-icon {
            font-size: 28px;
            color: var(--neon-secondary);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 特色亮点 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px 24px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .feature-card:hover {
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-4px);
        }
        .feature-card .f-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--neon-secondary);
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .feature-card:hover .f-icon {
            background: rgba(0, 212, 255, 0.16);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
        }
        .feature-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }
        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.25);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--neon-secondary);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--neon-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer p {
            margin-bottom: 8px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.08), rgba(0, 212, 255, 0.05));
            border-top: 1px solid rgba(108, 92, 231, 0.12);
            border-bottom: 1px solid rgba(108, 92, 231, 0.12);
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(108, 92, 231, 0.06), transparent);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        @media (max-width: 520px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo i {
            color: var(--neon-primary);
            filter: drop-shadow(0 0 8px var(--neon-glow));
        }
        .footer-brand .footer-logo span {
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--neon-secondary);
            padding-left: 4px;
        }
        .footer-col a i {
            margin-right: 6px;
            font-size: 12px;
            color: var(--neon-primary);
            opacity: 0.6;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--neon-secondary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--neon-primary);
            color: var(--neon-primary);
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.15);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 星星粒子装饰 ===== */
        .star-particle {
            position: fixed;
            border-radius: 50%;
            background: #fff;
            pointer-events: none;
            z-index: 0;
            opacity: 0.3;
            animation: twinkle var(--dur, 4s) ease-in-out infinite alternate;
        }
        @keyframes twinkle {
            0% {
                opacity: 0.15;
                transform: scale(0.8);
            }
            100% {
                opacity: 0.6;
                transform: scale(1.2);
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-10 {
            gap: 10px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #6c2bd9;
        --primary-light: #8b5cf6;
        --primary-dark: #4c1d95;
        --accent: #f59e0b;
        --accent-light: #fbbf24;
        --accent-glow: rgba(245, 158, 11, 0.4);
        --bg-dark: #0a0a1a;
        --bg-card: #12122a;
        --bg-card-hover: #1a1a3e;
        --bg-nav: rgba(10, 10, 26, 0.95);
        --text-light: #f1f5f9;
        --text-muted: #94a3b8;
        --text-dim: #64748b;
        --border-color: rgba(139, 92, 246, 0.2);
        --border-glow: rgba(139, 92, 246, 0.4);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
        --shadow-glow: 0 0 40px rgba(108, 43, 217, 0.3);
        --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-font-smoothing: antialiased; }
    body {
        font-family: var(--font-sans);
        background: var(--bg-dark);
        color: var(--text-light);
        line-height: 1.7;
        font-size: 16px;
        overflow-x: hidden;
    }
    a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
    button, input, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }

    /* ===== Container ===== */
    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) {
        .container { padding: 0 16px; }
    }

    /* ===== Header / Nav ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: var(--bg-nav);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        height: var(--header-height);
        transition: var(--transition);
    }
    .header.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.6); }
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--text-light);
        letter-spacing: -0.5px;
    }
    .logo i { color: var(--accent); font-size: 1.6rem; }
    .logo span { background: linear-gradient(135deg, var(--text-light) 30%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .logo:hover span { -webkit-text-fill-color: var(--accent); }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-list a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        color: var(--text-muted);
        font-weight: 500;
        font-size: 0.92rem;
        transition: var(--transition);
        position: relative;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-list a i { font-size: 0.85rem; opacity: 0.7; }
    .nav-list a:hover {
        color: var(--text-light);
        background: rgba(139, 92, 246, 0.12);
    }
    .nav-list a.active {
        color: var(--accent);
        background: rgba(245, 158, 11, 0.1);
        text-shadow: 0 0 20px var(--accent-glow);
    }
    .nav-list a.active::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 50%;
        transform: translateX(-50%);
        width: 60%;
        height: 2px;
        background: var(--accent);
        box-shadow: 0 0 12px var(--accent-glow);
        border-radius: 2px;
    }
    .nav-cta {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
        color: var(--text-light) !important;
        border: 1px solid var(--border-glow) !important;
        box-shadow: 0 0 20px rgba(108, 43, 217, 0.3);
        padding: 8px 22px !important;
        border-radius: var(--radius-sm) !important;
        font-weight: 600 !important;
    }
    .nav-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 40px rgba(108, 43, 217, 0.5) !important;
        background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
        color: var(--text-light) !important;
    }
    .nav-toggle { display: none; background: none; border: none; color: var(--text-light); font-size: 1.6rem; cursor: pointer; padding: 4px; }
    @media (max-width: 820px) {
        .nav-toggle { display: block; }
        .nav-list {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-nav);
            backdrop-filter: blur(30px);
            flex-direction: column;
            padding: 16px 20px 24px;
            gap: 4px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-110%);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        .nav-list.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .nav-list a { width: 100%; justify-content: center; padding: 12px; font-size: 1rem; }
        .nav-list a.active::after { display: none; }
        .nav-cta { margin-top: 8px; text-align: center; }
    }

    /* ===== Page Banner ===== */
    .page-banner {
        position: relative;
        padding: 120px 0 60px;
        background: linear-gradient(135deg, rgba(10,10,26,0.9), rgba(18,18,42,0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        border-bottom: 1px solid var(--border-color);
        text-align: center;
        overflow: hidden;
    }
    .page-banner::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle at 30% 50%, rgba(108,43,217,0.15), transparent 60%);
        pointer-events: none;
        animation: bannerGlow 12s ease-in-out infinite alternate;
    }
    @keyframes bannerGlow {
        0% { transform: translate(0,0) scale(1); opacity: 0.4; }
        100% { transform: translate(5%,5%) scale(1.1); opacity: 0.8; }
    }
    .page-banner .container { position: relative; z-index: 1; }
    .page-banner .breadcrumb {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        color: var(--text-dim);
        font-size: 0.9rem;
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .page-banner .breadcrumb a { color: var(--primary-light); }
    .page-banner .breadcrumb a:hover { color: var(--accent); }
    .page-banner .breadcrumb i { font-size: 0.7rem; color: var(--text-dim); }
    .page-banner .banner-category {
        display: inline-block;
        background: rgba(245,158,11,0.15);
        color: var(--accent);
        padding: 4px 16px;
        border-radius: 20px;
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 16px;
        border: 1px solid rgba(245,158,11,0.2);
    }
    .page-banner h1 {
        font-size: 2.6rem;
        font-weight: 800;
        max-width: 800px;
        margin: 0 auto 12px;
        background: linear-gradient(135deg, var(--text-light) 40%, var(--accent-light) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .page-banner .banner-meta {
        color: var(--text-muted);
        font-size: 0.95rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
    }
    .page-banner .banner-meta i { margin-right: 4px; color: var(--primary-light); }
    @media (max-width: 768px) {
        .page-banner { padding: 100px 0 40px; }
        .page-banner h1 { font-size: 1.8rem; }
        .page-banner .banner-meta { gap: 12px; font-size: 0.85rem; }
    }

    /* ===== Article Content ===== */
    .article-section {
        padding: 60px 0 80px;
    }
    .article-wrapper {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
        align-items: start;
    }
    .article-main {
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
        padding: 40px 44px;
        box-shadow: var(--shadow-card);
    }
    .article-main .article-body {
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--text-light);
    }
    .article-main .article-body p {
        margin-bottom: 1.4em;
    }
    .article-main .article-body h2, .article-main .article-body h3 {
        margin-top: 1.8em;
        margin-bottom: 0.6em;
        color: var(--accent-light);
    }
    .article-main .article-body h2 { font-size: 1.6rem; }
    .article-main .article-body h3 { font-size: 1.3rem; }
    .article-main .article-body ul, .article-main .article-body ol {
        padding-left: 1.5em;
        margin-bottom: 1.4em;
    }
    .article-main .article-body li {
        margin-bottom: 0.5em;
        list-style: disc;
        color: var(--text-muted);
    }
    .article-main .article-body a { color: var(--accent); text-decoration: underline; }
    .article-main .article-body blockquote {
        border-left: 4px solid var(--primary-light);
        padding: 12px 20px;
        margin: 1.5em 0;
        background: rgba(139,92,246,0.06);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-muted);
        font-style: italic;
    }
    .article-main .article-body img {
        border-radius: var(--radius-md);
        margin: 1.5em 0;
        box-shadow: var(--shadow-card);
    }
    .article-main .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
    }
    .article-main .article-tags .tag {
        background: rgba(139,92,246,0.1);
        color: var(--primary-light);
        padding: 4px 14px;
        border-radius: 20px;
        font-size: 0.82rem;
        border: 1px solid rgba(139,92,246,0.15);
    }
    .article-main .article-tags .tag:hover { background: rgba(139,92,246,0.2); }

    .article-notfound {
        text-align: center;
        padding: 80px 20px;
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
    }
    .article-notfound i { font-size: 3.6rem; color: var(--text-dim); margin-bottom: 20px; }
    .article-notfound h2 { font-size: 1.8rem; color: var(--text-light); margin-bottom: 12px; }
    .article-notfound p { color: var(--text-muted); margin-bottom: 20px; }
    .article-notfound .btn-back { display: inline-block; padding: 10px 28px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-weight: 600; }
    .article-notfound .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); }

    /* ===== Sidebar ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        padding: 24px 22px;
        box-shadow: var(--shadow-card);
    }
    .sidebar-card h3 {
        font-size: 1.1rem;
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--accent);
    }
    .sidebar-card h3 i { font-size: 1rem; }
    .sidebar-list a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 10px 0;
        border-bottom: 1px solid rgba(255,255,255,0.04);
        color: var(--text-muted);
        transition: var(--transition);
    }
    .sidebar-list a:last-child { border-bottom: none; }
    .sidebar-list a:hover { color: var(--accent); padding-left: 6px; }
    .sidebar-list a .s-num { color: var(--primary-light); font-weight: 700; font-size: 0.85rem; min-width: 28px; }
    .sidebar-list a .s-text { font-size: 0.92rem; line-height: 1.4; }
    .sidebar-cta {
        background: linear-gradient(135deg, rgba(108,43,217,0.15), rgba(245,158,11,0.08));
        border: 1px solid var(--border-glow);
        text-align: center;
        padding: 28px 20px;
    }
    .sidebar-cta i { font-size: 2.2rem; color: var(--accent); margin-bottom: 12px; }
    .sidebar-cta h4 { color: var(--text-light); margin-bottom: 6px; }
    .sidebar-cta p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
    .sidebar-cta .btn-side { display: inline-block; padding: 8px 24px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: var(--radius-sm); font-weight: 600; border: 1px solid var(--border-glow); }
    .sidebar-cta .btn-side:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(108,43,217,0.4); }

    @media (max-width: 1024px) {
        .article-wrapper { grid-template-columns: 1fr; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .sidebar-cta { grid-column: 1 / -1; }
    }
    @media (max-width: 600px) {
        .article-main { padding: 24px 18px; }
        .article-sidebar { grid-template-columns: 1fr; }
    }

    /* ===== Related Posts ===== */
    .related-section {
        padding: 60px 0 80px;
        background: rgba(255,255,255,0.02);
        border-top: 1px solid var(--border-color);
    }
    .related-section h2 {
        text-align: center;
        font-size: 1.8rem;
        margin-bottom: 40px;
        color: var(--text-light);
    }
    .related-section h2 i { color: var(--accent); margin-right: 10px; }
    .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);
    }
    .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow); border-color: var(--border-glow); }
    .related-card .rc-img {
        height: 180px;
        background: var(--bg-card-hover);
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }
    .related-card .rc-img img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
    .related-card .rc-body { padding: 18px 20px 22px; }
    .related-card .rc-body h4 { font-size: 1.05rem; margin-bottom: 8px; }
    .related-card .rc-body h4 a { color: var(--text-light); }
    .related-card .rc-body h4 a:hover { color: var(--accent); }
    .related-card .rc-body p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card .rc-meta { display: flex; align-items: center; gap: 14px; margin-top: 12px; font-size: 0.8rem; color: var(--text-dim); }
    .related-card .rc-meta i { margin-right: 4px; }
    @media (max-width: 820px) {
        .related-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
        .related-grid { grid-template-columns: 1fr; }
    }

    /* ===== Footer ===== */
    .footer {
        background: linear-gradient(180deg, rgba(10,10,26,1), rgba(5,5,16,1));
        border-top: 1px solid var(--border-color);
        padding: 60px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 700; margin-bottom: 16px; }
    .footer-brand .footer-logo i { color: var(--accent); }
    .footer-brand p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; max-width: 340px; }
    .footer-col h4 { font-size: 1rem; color: var(--accent); margin-bottom: 16px; font-weight: 600; }
    .footer-col a { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.9rem; padding: 5px 0; }
    .footer-col a i { font-size: 0.65rem; color: var(--primary-light); }
    .footer-col a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 16px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
        color: var(--text-dim);
        font-size: 0.85rem;
    }
    .footer-social { display: flex; gap: 14px; }
    .footer-social a { color: var(--text-muted); font-size: 1.2rem; }
    .footer-social a:hover { color: var(--accent); }
    .footer-bottom a { color: var(--primary-light); }
    .footer-bottom a:hover { color: var(--accent); }
    @media (max-width: 820px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    /* ===== Utility ===== */
    .text-center { text-align: center; }
    .mt-20 { margin-top: 20px; }
    .mb-20 { margin-bottom: 20px; }
    .gap-8 { gap: 8px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3cf0;
            --primary-dark: #4a1db8;
            --primary-light: #8b6cf7;
            --primary-glow: rgba(108, 60, 240, 0.4);
            --accent: #f0c43c;
            --accent-glow: rgba(240, 196, 60, 0.3);
            --dark-bg: #0b0a1a;
            --dark-card: #13102e;
            --dark-card-hover: #1c1845;
            --dark-border: #2a2560;
            --text-light: #f0edff;
            --text-muted: #a8a0d0;
            --text-dim: #6a6290;
            --body-font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 40px rgba(108,60,240,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--body-font);
            background: var(--dark-bg);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: #fff; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 10, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--dark-border);
            height: var(--header-h);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.6); }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .header-logo i {
            color: var(--accent);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 10px var(--accent-glow));
        }
        .header-logo span { background: linear-gradient(135deg, #fff, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i { font-size: 0.9rem; }
        .nav-list a:hover { color: #fff; background: rgba(108,60,240,0.12); }
        .nav-list a.active {
            color: #fff;
            background: rgba(108,60,240,0.18);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--primary-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            box-shadow: 0 0 20px rgba(108,60,240,0.2);
        }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(108,60,240,0.4) !important; background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important; }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.8rem; cursor: pointer; padding: 4px; }

        /* ===== Banner 内页横幅 ===== */
        .banner {
            margin-top: var(--header-h);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(11,10,26,0.92), rgba(19,16,46,0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--dark-border);
            overflow: hidden;
        }
        .banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 40%, rgba(108,60,240,0.06), transparent 60%);
            pointer-events: none;
        }
        .banner-content { position: relative; z-index: 2; max-width: 720px; padding: 60px 20px; }
        .banner-content h1 { font-size: 3rem; margin-bottom: 16px; background: linear-gradient(135deg, #fff, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .banner-content p { font-size: 1.15rem; color: var(--text-muted); max-width: 560px; margin: 0 auto; }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(108,60,240,0.2);
            border: 1px solid rgba(108,60,240,0.3);
            border-radius: 40px;
            padding: 4px 16px 4px 8px;
            font-size: 0.8rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .banner-badge i { font-size: 0.75rem; }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; position: relative; }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header h2 { font-size: 2.2rem; margin-bottom: 12px; }
        .section-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
        .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-light);
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-subtitle i { font-size: 0.8rem; }

        /* ===== 卡片网格 ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover { background: var(--dark-card-hover); border-color: rgba(108,60,240,0.3); transform: translateY(-6px); box-shadow: var(--shadow-glow); }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(108,60,240,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .card:hover .card-icon { background: rgba(108,60,240,0.25); box-shadow: 0 0 20px rgba(108,60,240,0.15); }
        .card h3 { font-size: 1.3rem; margin-bottom: 10px; }
        .card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
        .card .tag {
            display: inline-block;
            background: rgba(108,60,240,0.12);
            color: var(--primary-light);
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 14px;
            border: 1px solid rgba(108,60,240,0.15);
        }

        /* ===== 图文列表 ===== */
        .list-card {
            display: flex;
            gap: 24px;
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
            align-items: flex-start;
        }
        .list-card:hover { background: var(--dark-card-hover); border-color: rgba(108,60,240,0.25); transform: translateX(4px); }
        .list-card .num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(108,60,240,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: var(--primary-light);
            font-size: 1.1rem;
        }
        .list-card .content h4 { font-size: 1.1rem; margin-bottom: 4px; }
        .list-card .content p { color: var(--text-muted); font-size: 0.92rem; }

        /* ===== 图文封面卡片 ===== */
        .cover-card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .cover-card:hover { transform: translateY(-6px); border-color: rgba(108,60,240,0.3); box-shadow: var(--shadow-glow); }
        .cover-card .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--dark-border);
        }
        .cover-card .cover-body { padding: 20px 22px 24px; }
        .cover-card .cover-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .cover-card .cover-body p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
        .cover-card .cover-meta { display: flex; align-items: center; gap: 16px; margin-top: 12px; font-size: 0.8rem; color: var(--text-dim); }
        .cover-card .cover-meta i { margin-right: 4px; }

        /* ===== 数据 / 统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-item {
            text-align: center;
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius);
            padding: 32px 16px;
            transition: var(--transition);
        }
        .stat-item:hover { border-color: rgba(108,60,240,0.3); background: var(--dark-card-hover); }
        .stat-item .stat-num { font-size: 2.8rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .stat-item .stat-label { color: var(--text-muted); font-size: 0.95rem; margin-top: 6px; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-sm);
            padding: 0;
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item:hover { border-color: rgba(108,60,240,0.2); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            color: #fff;
            font-size: 1.05rem;
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i { color: var(--primary-light); transition: var(--transition); font-size: 0.9rem; }
        .faq-question.active i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(108,60,240,0.08), rgba(19,16,46,0.6)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-top: 1px solid var(--dark-border);
            border-bottom: 1px solid var(--dark-border);
            text-align: center;
            padding: 80px 0;
        }
        .cta-section h2 { font-size: 2.4rem; margin-bottom: 16px; }
        .cta-section p { color: var(--text-muted); max-width: 520px; margin: 0 auto 32px; font-size: 1.05rem; }
        .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: transparent;
            color: #fff;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 0 24px rgba(108,60,240,0.25);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 40px rgba(108,60,240,0.4); background: linear-gradient(135deg, var(--primary-light), var(--primary)); }
        .btn-outline {
            border: 1.5px solid var(--dark-border);
            color: var(--text-light);
        }
        .btn-outline:hover { border-color: var(--primary); background: rgba(108,60,240,0.1); transform: translateY(-3px); }

        /* ===== Footer ===== */
        .footer {
            background: #06050f;
            border-top: 1px solid var(--dark-border);
            padding: 60px 0 30px;
        }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 16px; }
        .footer-logo i { color: var(--accent); filter: drop-shadow(0 0 8px var(--accent-glow)); }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; max-width: 340px; }
        .footer-col h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 18px; letter-spacing: 0.5px; }
        .footer-col a { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.9rem; padding: 5px 0; transition: var(--transition); }
        .footer-col a i { font-size: 0.65rem; color: var(--text-dim); }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--dark-border);
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a { color: var(--text-muted); font-size: 1.2rem; transition: var(--transition); }
        .footer-social a:hover { color: var(--accent); transform: scale(1.15); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(11,10,26,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                border-bottom: 1px solid var(--dark-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 12px 18px; font-size: 1rem; }
            .nav-list a.active::after { display: none; }
            .nav-list a.active { background: rgba(108,60,240,0.2); }
            .nav-cta { text-align: center; justify-content: center; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .banner-content h1 { font-size: 2.2rem; }
            .banner { min-height: 240px; }
            .section { padding: 56px 0; }
            .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .list-card { flex-direction: column; gap: 12px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
            .cover-card .cover-img { height: 160px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .banner-content h1 { font-size: 1.7rem; }
            .banner-content p { font-size: 0.95rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item { padding: 20px 12px; }
            .stat-item .stat-num { font-size: 2rem; }
            .btn-group { flex-direction: column; align-items: center; }
            .btn { width: 100%; justify-content: center; }
        }