/* roulang page: index */
:root {
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: '"Noto Sans SC"', '"PingFang SC"', '"Microsoft YaHei"', system-ui, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
        }
        .side-nav {
            width: 16rem;
            height: 100vh;
            position: fixed;
            left: 0;
            top: 0;
            background: linear-gradient(180deg, #1e1b4b 0%, #312e81 50%, #3730a3 100%);
            color: #fff;
            z-index: 50;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
            box-shadow: 4px 0 20px rgba(0,0,0,0.15);
        }
        .side-nav .logo-area {
            padding: 2rem 1.5rem 1.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .side-nav .logo-area .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, #fcd34d, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .side-nav .logo-area .logo-sub {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.5);
            margin-top: 0.25rem;
            letter-spacing: 0.05em;
        }
        .side-nav .nav-links {
            flex: 1;
            padding: 1.5rem 1rem;
            display: flex;
            flex-direction: column;
            gap: 0.35rem;
        }
        .side-nav .nav-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: 0.75rem;
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .side-nav .nav-links a:hover {
            background: rgba(255,255,255,0.1);
            color: #fff;
        }
        .side-nav .nav-links a.active {
            background: rgba(255,255,255,0.15);
            color: #fcd34d;
            font-weight: 600;
        }
        .side-nav .nav-links a i {
            width: 1.25rem;
            text-align: center;
            font-size: 1.05rem;
        }
        .side-nav .nav-footer {
            padding: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.7rem;
            color: rgba(255,255,255,0.35);
            text-align: center;
        }
        .main-content {
            margin-left: 16rem;
            min-height: 100vh;
        }
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 4rem;
            background: #1e1b4b;
            z-index: 60;
            padding: 0 1.25rem;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(0,0,0,0.2);
        }
        .mobile-header .logo-text {
            font-size: 1.1rem;
            font-weight: 700;
            background: linear-gradient(135deg, #fcd34d, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mobile-header .menu-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem;
        }
        .mobile-menu-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 70;
        }
        .mobile-menu-overlay.open {
            display: block;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 16rem;
            background: #1e1b4b;
            z-index: 80;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            padding: 2rem 1.25rem;
            display: flex;
            flex-direction: column;
        }
        .mobile-menu-panel.open {
            transform: translateX(0);
        }
        .mobile-menu-panel .close-btn {
            align-self: flex-end;
            background: none;
            border: none;
            color: rgba(255,255,255,0.6);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
        }
        .mobile-menu-panel .m-links {
            margin-top: 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .mobile-menu-panel .m-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: 0.75rem;
            color: rgba(255,255,255,0.7);
            font-size: 1rem;
            font-weight: 500;
            transition: all 0.2s;
        }
        .mobile-menu-panel .m-links a:hover {
            background: rgba(255,255,255,0.1);
            color: #fff;
        }
        .mobile-menu-panel .m-links a.active {
            background: rgba(255,255,255,0.15);
            color: #fcd34d;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #1e293b;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: #64748b;
            max-width: 32rem;
        }
        .card-shadow {
            box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }
        .card-shadow:hover {
            box-shadow: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.05);
            transform: translateY(-2px);
        }
        .stat-card {
            background: #fff;
            border-radius: 1rem;
            padding: 1.75rem 1.5rem;
            text-align: center;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
            transition: all 0.25s ease;
        }
        .stat-card:hover {
            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
            transform: translateY(-3px);
        }
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .faq-item {
            border-bottom: 1px solid #e2e8f0;
            padding: 1.25rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 0.25rem 0;
        }
        .faq-question i {
            color: #94a3b8;
            transition: transform 0.2s;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            color: #475569;
            padding-top: 0.75rem;
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(30,27,75,0.85) 0%, rgba(55,48,163,0.7) 50%, rgba(79,70,229,0.5) 100%);
        }
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: #e0e7ff;
            color: #4338ca;
        }
        .badge-accent {
            background: #fef3c7;
            color: #92400e;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            background: linear-gradient(135deg, #4f46e5, #6366f1);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(79,70,229,0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79,70,229,0.4);
        }
        .btn-primary:focus {
            outline: 2px solid #818cf8;
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            background: #fff;
            color: #4f46e5;
            border: 2px solid #e0e7ff;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            border-color: #4f46e5;
            background: #f8fafc;
            transform: translateY(-2px);
        }
        .btn-secondary:focus {
            outline: 2px solid #818cf8;
            outline-offset: 2px;
        }
        .grid-card {
            background: #fff;
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
            transition: all 0.25s ease;
        }
        .grid-card:hover {
            box-shadow: 0 12px 28px rgba(0,0,0,0.08);
            transform: translateY(-4px);
        }
        .grid-card .card-img {
            height: 12rem;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .grid-card .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .grid-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #1e293b;
            margin-bottom: 0.4rem;
        }
        .grid-card .card-body p {
            font-size: 0.9rem;
            color: #64748b;
        }
        .tag {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            border-radius: 0.375rem;
            font-size: 0.7rem;
            font-weight: 500;
            background: #f1f5f9;
            color: #475569;
            margin-right: 0.25rem;
            margin-bottom: 0.25rem;
        }
        .tag-accent {
            background: #fef3c7;
            color: #92400e;
        }
        .footer-link {
            color: #94a3b8;
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: #fcd34d;
        }
        @media (max-width: 1023px) {
            .side-nav {
                display: none;
            }
            .main-content {
                margin-left: 0;
                padding-top: 4rem;
            }
            .mobile-header {
                display: flex;
            }
            .section-title {
                font-size: 1.65rem;
            }
        }
        @media (min-width: 1024px) {
            .mobile-header {
                display: none !important;
            }
            .mobile-menu-overlay, .mobile-menu-panel {
                display: none !important;
            }
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.4rem;
            }
            .stat-card .number {
                font-size: 1.8rem;
            }
            .hero-content h1 {
                font-size: 1.8rem !important;
            }
            .hero-content p {
                font-size: 0.95rem !important;
            }
        }
        @media (max-width: 480px) {
            .grid-card .card-img {
                height: 9rem;
            }
            .btn-primary, .btn-secondary {
                padding: 0.6rem 1.25rem;
                font-size: 0.9rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1341b0;
            --secondary: #7c3aed;
            --secondary-light: #a78bfa;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-dark: #0b1121;
            --bg-card: #1a2332;
            --bg-card-hover: #1f2a3d;
            --bg-section: #0f172a;
            --text-light: #f1f5f9;
            --text-body: #e2e8f0;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-color: #2a3a52;
            --border-light: #3a4a62;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --nav-width: 230px;
            --header-height: 64px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧导航 ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: linear-gradient(180deg, #0c1322 0%, #111b2e 100%);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition), opacity var(--transition);
            padding: 0;
            overflow-y: auto;
        }
        .side-nav .logo-area {
            padding: 28px 20px 16px;
            border-bottom: 1px solid var(--border-color);
        }
        .side-nav .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .side-nav .logo-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 2px;
            letter-spacing: 0.3px;
        }
        .side-nav .nav-links {
            flex: 1;
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .side-nav .nav-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .side-nav .nav-links a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-dim);
            transition: color var(--transition);
        }
        .side-nav .nav-links a:hover {
            background: rgba(59, 130, 246, 0.1);
            color: var(--text-light);
        }
        .side-nav .nav-links a:hover i {
            color: var(--primary-light);
        }
        .side-nav .nav-links a.active {
            background: rgba(59, 130, 246, 0.18);
            color: #fff;
            box-shadow: inset 3px 0 0 var(--primary-light);
        }
        .side-nav .nav-links a.active i {
            color: var(--primary-light);
        }
        .side-nav .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 0.7rem;
            color: var(--text-dim);
            text-align: center;
            line-height: 1.5;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏（仅在移动端显示） ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: #0c1322;
            border-bottom: 1px solid var(--border-color);
            z-index: 1100;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .logo-text {
            font-size: 1.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mobile-header .hamburger {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .mobile-header .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 移动端菜单遮罩 ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1050;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.open {
            display: block;
        }

        /* ===== Hero 横幅 ===== */
        .page-hero {
            position: relative;
            padding: 80px 24px 70px;
            background: linear-gradient(135deg, #0b1121 0%, #162033 50%, #0b1121 100%);
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-hero .hero-glow {
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        .page-hero .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.3);
            border-radius: 50px;
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 6px 24px rgba(26, 86, 219, 0.35);
            border: none;
            cursor: pointer;
        }
        .page-hero .hero-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(26, 86, 219, 0.5);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .page-hero .hero-cta i {
            font-size: 1.1rem;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1rem;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 0 auto 16px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 12px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.15);
            color: var(--primary-light);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 16px;
            transition: background var(--transition);
        }
        .step-card:hover .step-number {
            background: rgba(59, 130, 246, 0.25);
        }
        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .step-card .step-icon {
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 特色功能卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .feature-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .feature-card .feature-icon.purple {
            background: linear-gradient(135deg, var(--secondary), #5b21b6);
        }
        .feature-card .feature-icon.amber {
            background: linear-gradient(135deg, var(--accent), #d97706);
        }
        .feature-card .feature-icon.teal {
            background: linear-gradient(135deg, #0d9488, #0f766e);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 内容资源卡片 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-light);
        }
        .content-card .card-img {
            height: 200px;
            background: #1a2332;
            position: relative;
            overflow: hidden;
        }
        .content-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.05);
        }
        .content-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(245, 158, 11, 0.9);
            color: #000;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .content-card .card-body {
            padding: 20px 22px 24px;
        }
        .content-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .content-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .content-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--text-dim);
        }
        .content-card .card-body .card-meta i {
            margin-right: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-light);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-item .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-question i {
            color: var(--accent);
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item .faq-answer-inner {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0b1121 0%, #162033 50%, #0b1121 100%);
            padding: 80px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            background: linear-gradient(135deg, var(--accent), #d97706);
            color: #000;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
            box-shadow: 0 6px 28px rgba(245, 158, 11, 0.3);
            border: none;
            cursor: pointer;
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(245, 158, 11, 0.45);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }

        /* ===== 统计数字条 ===== */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin: 0 auto;
            max-width: 960px;
        }
        .stat-item {
            text-align: center;
            padding: 24px 12px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== 页脚 ===== */
        footer {
            background: #080d1a;
            border-top: 1px solid var(--border-color);
        }
        footer .footer-link {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        footer .footer-link:hover {
            color: var(--accent-light);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            /* 移动端：隐藏左侧导航，显示顶部栏 */
            .side-nav {
                transform: translateX(-100%);
                opacity: 0;
                pointer-events: none;
                width: 270px;
                border-right: none;
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.6);
            }
            .side-nav.open {
                transform: translateX(0);
                opacity: 1;
                pointer-events: all;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .page-hero {
                padding: 52px 20px 48px;
                min-height: auto;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.92rem;
                margin-bottom: 32px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .content-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 1.7rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section .cta-btn {
                padding: 14px 32px;
                font-size: 0.95rem;
            }
            .feature-card {
                flex-direction: column;
                padding: 24px 20px;
            }
            .feature-card .feature-icon {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
            .faq-item .faq-question {
                font-size: 0.92rem;
                padding: 14px 16px;
            }
            .faq-item .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .content-card .card-img {
                height: 180px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero .hero-cta {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .stat-item {
                padding: 16px 8px;
            }
            .stat-item .stat-number {
                font-size: 1.4rem;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .content-card .card-body {
                padding: 16px 16px 20px;
            }
        }

        @media (min-width: 769px) {
            .side-nav {
                transform: translateX(0) !important;
                opacity: 1 !important;
                pointer-events: all !important;
            }
            .mobile-header {
                display: none !important;
            }
            .nav-overlay {
                display: none !important;
            }
        }

        /* ===== 实用辅助 ===== */
        .gap-1 {
            gap: 4px;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 12px;
        }
        .gap-4 {
            gap: 16px;
        }
        .gap-5 {
            gap: 20px;
        }
        .gap-6 {
            gap: 24px;
        }
        .text-center {
            text-align: center;
        }
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: article */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --accent: #f59e0b;
            --dark: #0f172a;
            --dark-surface: #1e293b;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --shadow-card: 0 4px 24px rgba(99, 102, 241, 0.08);
            --shadow-hover: 0 12px 40px rgba(99, 102, 241, 0.16);
            --radius-card: 1rem;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: #f8fafc;
            color: #0f172a;
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        /* 左侧竖向导航 */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.3);
        }
        .side-nav .logo-area {
            padding: 2rem 1.5rem 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .side-nav .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            background: linear-gradient(135deg, #a5b4fc 0%, #818cf8 50%, #fcd34d 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }
        .side-nav .logo-sub {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.45);
            margin-top: 0.25rem;
            letter-spacing: 0.4px;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.45);
        }
        .side-nav .nav-links {
            flex: 1;
            padding: 1.25rem 0.75rem;
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }
        .side-nav .nav-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.7rem 1rem;
            border-radius: 0.75rem;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .side-nav .nav-links a i {
            width: 1.25rem;
            text-align: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .side-nav .nav-links a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .side-nav .nav-links a:hover i {
            color: #818cf8;
        }
        .side-nav .nav-links a.active {
            background: rgba(99, 102, 241, 0.2);
            color: #fff;
            box-shadow: inset 3px 0 0 #6366f1;
        }
        .side-nav .nav-links a.active i {
            color: #818cf8;
        }
        .side-nav .nav-footer {
            padding: 1rem 1.5rem;
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.25);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            line-height: 1.5;
        }
        /* 右侧主内容区 */
        .main-content {
            margin-left: 260px;
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #0f172a;
            z-index: 999;
            padding: 0 1rem;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-header .logo-text {
            font-size: 1.1rem;
            font-weight: 800;
            background: linear-gradient(135deg, #a5b4fc 0%, #818cf8 50%, #fcd34d 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mobile-header .menu-toggle {
            color: #fff;
            font-size: 1.4rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0.25rem;
        }
        /* 移动端抽屉菜单 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #0f172a;
            z-index: 998;
            padding: 1.5rem;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .mobile-drawer .nav-links {
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }
        .mobile-drawer .nav-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.8rem 1rem;
            border-radius: 0.75rem;
            color: rgba(255, 255, 255, 0.65);
            font-size: 1rem;
            font-weight: 500;
        }
        .mobile-drawer .nav-links a i {
            width: 1.25rem;
            text-align: center;
            color: rgba(255, 255, 255, 0.3);
        }
        .mobile-drawer .nav-links a.active {
            background: rgba(99, 102, 241, 0.2);
            color: #fff;
        }
        .mobile-drawer .nav-links a.active i {
            color: #818cf8;
        }
        /* 文章页样式 */
        .article-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 41, 59, 0.78) 100%);
            z-index: 1;
        }
        .article-banner>* {
            position: relative;
            z-index: 2;
        }
        .article-content h1 {
            font-size: 2.25rem;
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .article-content .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: #1e293b;
        }
        .article-body p {
            margin-bottom: 1.25rem;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: #0f172a;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #1e293b;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .article-body img {
            border-radius: 0.75rem;
            margin: 1.5rem 0;
            box-shadow: var(--shadow-card);
        }
        .article-body blockquote {
            border-left: 4px solid #6366f1;
            padding: 0.75rem 1.25rem;
            margin: 1.5rem 0;
            background: #f1f5f9;
            border-radius: 0 0.5rem 0.5rem 0;
            color: #334155;
            font-style: italic;
        }
        .article-body a {
            color: #4f46e5;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: #6366f1;
        }
        .tag-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(99, 102, 241, 0.12);
            color: #4f46e5;
            transition: var(--transition);
        }
        .tag-badge:hover {
            background: rgba(99, 102, 241, 0.2);
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .side-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .article-content h1 {
                font-size: 1.75rem;
            }
            .article-banner {
                min-height: 240px;
            }
        }
        @media (max-width: 640px) {
            .article-content h1 {
                font-size: 1.4rem;
            }
            .article-banner {
                min-height: 200px;
                padding: 2rem 1rem !important;
            }
            .article-body {
                font-size: 0.98rem;
                line-height: 1.8;
            }
            .article-body h2 {
                font-size: 1.25rem;
            }
            .article-body h3 {
                font-size: 1.05rem;
            }
        }
        /* 页脚链接样式 */
        .footer-link {
            color: #94a3b8;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: #a5b4fc;
        }
        /* 加载动画 */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .fade-up-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-up-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-up-delay-3 {
            animation-delay: 0.3s;
        }