/* roulang page: index */
:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        .app-shell {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            width: 260px;
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            background: var(--bg-dark);
            color: #e2e8f0;
            display: flex;
            flex-direction: column;
            padding: 32px 0;
            z-index: 50;
            overflow-y: auto;
            transition: transform 0.3s ease;
        }
        .main-content {
            flex: 1;
            margin-left: 260px;
            min-width: 0;
        }
        .sidebar-brand {
            padding: 0 28px;
            margin-bottom: 40px;
        }
        .sidebar-brand a {
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 12px;
            line-height: 1.3;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .sidebar-nav {
            padding: 0 16px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: 12px;
            color: #94a3b8;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 4px;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.4);
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
        }
        .sidebar-footer {
            padding: 20px 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: #64748b;
        }
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--bg-dark);
            z-index: 60;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
        }
        .mobile-header .mobile-logo {
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-menu-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            border-radius: 8px;
            transition: background 0.3s;
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--bg-dark);
            padding: 16px;
            z-index: 55;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }
        .mobile-nav.open {
            display: block;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            color: #94a3b8;
            font-size: 16px;
            font-weight: 500;
            border-radius: 10px;
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: var(--primary);
            color: #fff;
        }
        .page-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .hero {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            color: #fff;
            padding: 100px 0;
            max-width: 760px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 100px;
            padding: 6px 18px;
            font-size: 14px;
            color: #e2e8f0;
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }
        .hero-title span {
            color: #a5b4fc;
        }
        .hero-subtitle {
            font-size: 18px;
            color: #c7d2fe;
            margin-bottom: 40px;
            line-height: 1.8;
            max-width: 620px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.4);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(79, 70, 229, 0.4);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.5);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(79, 70, 229, 0.4);
        }
        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
        }
        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .btn-outline-light:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }
        .section-block {
            padding: 96px 0;
        }
        .section-shaded {
            background: linear-gradient(180deg, #f8fafc, #eef2ff);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-block;
            background: #eef2ff;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .section-tag.light {
            background: rgba(255, 255, 255, 0.12);
            color: #c7d2fe;
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text);
        }
        .section-title.light {
            color: #fff;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section-subtitle.light {
            color: #94a3b8;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }
        .feature-icon.indigo {
            background: #eef2ff;
            color: var(--primary);
        }
        .feature-icon.amber {
            background: #fffbeb;
            color: #d97706;
        }
        .feature-icon.emerald {
            background: #ecfdf5;
            color: #059669;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: block;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-cover {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .category-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-cover img {
            transform: scale(1.05);
        }
        .category-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(15, 23, 42, 0.3));
        }
        .category-body {
            padding: 24px 28px;
        }
        .category-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-body p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            transition: gap 0.3s;
        }
        .category-card:hover .category-link {
            gap: 12px;
        }
        .post-list {
            display: grid;
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }
        .post-item {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .post-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateX(4px);
            border-color: var(--primary-light);
        }
        .post-content {
            flex: 1;
            min-width: 0;
        }
        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .post-category {
            background: #eef2ff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 100px;
        }
        .post-date {
            color: var(--text-muted);
            font-size: 14px;
        }
        .post-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.5;
            transition: color 0.3s;
        }
        .post-item h3 a:hover {
            color: var(--primary);
        }
        .post-item p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-arrow {
            margin-left: auto;
            color: var(--primary);
            opacity: 0;
            transform: translateX(-8px);
            transition: var(--transition);
            font-size: 18px;
            padding-top: 8px;
            flex-shrink: 0;
        }
        .post-item:hover .post-arrow {
            opacity: 1;
            transform: translateX(0);
        }
        .empty-list {
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            padding: 48px;
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
            max-width: 900px;
            margin: 0 auto;
        }
        .empty-list i {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }
        .stats-section {
            background: var(--bg-dark);
            color: #fff;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 32px 24px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 44px;
            font-weight: 800;
            color: #a5b4fc;
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .stat-label {
            color: #94a3b8;
            font-size: 15px;
            font-weight: 500;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            text-align: center;
            padding: 36px 20px 32px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .step-num {
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-section {
            padding: 96px 0;
            background: var(--bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: color 0.3s;
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--text-muted);
            transition: transform 0.3s;
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 15px;
            border-top: 1px solid var(--border);
            margin: 0 28px 0;
            padding: 16px 0 20px;
        }
        .cta-section {
            background: linear-gradient(135deg, #1e1b4b, #3730a3);
            padding: 80px 0;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: #94a3b8;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-contact {
            font-size: 14px;
            line-height: 2;
        }
        .footer-contact i {
            margin-right: 8px;
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: #64748b;
        }
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .page-container {
                padding: 0 20px;
            }
            .hero {
                min-height: 520px;
                padding-top: 64px;
            }
            .hero-content {
                padding: 80px 0;
            }
            .hero-title {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section-block {
                padding: 64px 0;
            }
            .section-title {
                font-size: 30px;
            }
        }
        @media (max-width: 520px) {
            .feature-grid,
            .stats-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .post-item {
                padding: 20px;
                flex-direction: column;
            }
            .post-arrow {
                display: none;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 26px;
            }
            .hero-title {
                font-size: 26px;
            }
            .category-cover {
                height: 180px;
            }
            .faq-item summary {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 20px 20px;
                margin: 0 20px 0;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 12px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul, ol {
            list-style: none;
        }

        .page-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        h1, h2, h3, h4, h5 {
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== 应用布局: 左侧导航 + 右侧内容 ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }

        /* ===== 左侧固定导航 ===== */
        .sidebar {
            width: 264px;
            flex-shrink: 0;
            background: linear-gradient(160deg, #111827 0%, #1e1b4b 55%, #312e81 100%);
            color: #fff;
            padding: 28px 20px;
            position: sticky;
            top: 0;
            height: 100vh;
            overflow-y: auto;
            z-index: 100;
            display: flex;
            flex-direction: column;
            border-right: 1px solid rgba(255,255,255,0.06);
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 8px 12px 22px;
            margin-bottom: 22px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .sidebar-brand .brand-icon {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: rgba(255,255,255,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary-light);
            flex-shrink: 0;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .sidebar-brand .brand-text {
            font-size: 15px;
            font-weight: 700;
            line-height: 1.4;
            letter-spacing: 0.3px;
            color: #fff;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 16px;
            border-radius: 12px;
            color: rgba(255,255,255,0.70);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.25s ease;
            border: 1px solid transparent;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

        .sidebar-nav a:hover {
            background: rgba(255,255,255,0.10);
            color: #fff;
            transform: translateX(4px);
        }

        .sidebar-nav a.active {
            background: rgba(255,255,255,0.16);
            border-color: rgba(255,255,255,0.12);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(0,0,0,0.18);
        }

        .sidebar-nav a.active i {
            color: var(--primary-light);
        }

        .sidebar-footer {
            margin-top: 24px;
            padding: 16px;
            background: rgba(255,255,255,0.05);
            border-radius: 12px;
            text-align: center;
        }

        .sidebar-footer p {
            font-size: 12px;
            color: rgba(255,255,255,0.45);
            line-height: 1.5;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1;
            min-width: 0;
            background: var(--bg);
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: linear-gradient(135deg, #111827 0%, #1e1b4b 100%);
            padding: 14px 20px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }

        .mobile-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
        }

        .mobile-brand i {
            color: var(--primary-light);
            font-size: 20px;
        }

        .mobile-menu-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }

        .mobile-menu-btn:hover {
            background: rgba(255,255,255,0.1);
        }

        .mobile-nav-panel {
            display: none;
            padding: 8px 20px 18px;
            background: #1e1b4b;
            border-top: 1px solid rgba(255,255,255,0.08);
        }

        .mobile-nav-panel.open {
            display: block;
        }

        .mobile-nav-panel a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 8px;
            border-radius: 10px;
            color: rgba(255,255,255,0.75);
            font-size: 15px;
            font-weight: 500;
            margin-bottom: 2px;
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: rgba(255,255,255,0.10);
            color: #fff;
        }

        /* ===== Hero Banner ===== */
        .news-hero {
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(49,46,129,0.88) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 88px 0 64px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .news-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: 20px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(245,158,11,0.08);
            pointer-events: none;
        }

        .news-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            pointer-events: none;
        }

        .news-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.14);
            border: 1px solid rgba(255,255,255,0.22);
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.4px;
            backdrop-filter: blur(8px);
            margin-bottom: 22px;
        }

        .news-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .news-hero h1 span {
            color: var(--primary-light);
        }

        .news-hero p {
            font-size: 16px;
            opacity: 0.85;
            max-width: 640px;
            margin-bottom: 30px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-hero {
            background: #fff;
            color: #1e1b4b;
            padding: 14px 30px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
            transition: all 0.3s;
        }

        .btn-hero:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.25);
            color: #1e1b4b;
        }

        .btn-hero-outline {
            background: transparent;
            border: 1.5px solid rgba(255,255,255,0.4);
            color: #fff;
            padding: 14px 30px;
            border-radius: 100px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s;
        }

        .btn-hero-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .section-header-left .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(99,102,241,0.08);
            padding: 4px 14px;
            border-radius: 100px;
            margin-bottom: 10px;
            letter-spacing: 0.4px;
        }

        .section-header-left h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 6px;
        }

        .section-header-left p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 480px;
        }

        .view-all-btn {
            color: var(--primary);
            font-weight: 500;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 100px;
            border: 1px solid var(--border);
            background: var(--surface);
            transition: all 0.25s;
        }

        .view-all-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 15px rgba(99,102,241,0.25);
        }

        /* ===== 资讯分类标签 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud .tag-item {
            padding: 10px 22px;
            border-radius: 100px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.25s;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag-cloud .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(99,102,241,0.04);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .tag-cloud .tag-item.hot {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 15px rgba(99,102,241,0.3);
        }

        /* ===== 资讯卡片网格 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(99,102,241,0.25);
        }

        .news-card .card-image {
            position: relative;
            height: 200px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .news-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .news-card:hover .card-image img {
            transform: scale(1.05);
        }

        .news-card .card-image .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255,255,255,0.92);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(4px);
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            z-index: 1;
        }

        .news-card .card-content {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .news-card .card-meta i {
            color: var(--primary-light);
            width: 14px;
        }

        .news-card .card-meta .divider {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: #cbd5e1;
        }

        .news-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.2s;
        }

        .news-card:hover .card-title {
            color: var(--primary);
        }

        .news-card .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-top: auto;
        }

        /* ===== 热门游戏排行 ===== */
        .trending-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .trending-card {
            background: var(--surface);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 22px 24px;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .trending-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: rgba(99,102,241,0.25);
        }

        .trending-card .trending-rank {
            font-size: 30px;
            font-weight: 800;
            color: rgba(99,102,241,0.15);
            min-width: 40px;
            text-align: center;
            line-height: 1;
            font-style: italic;
        }

        .trending-card:nth-child(-n+3) .trending-rank {
            color: rgba(245,158,11,0.45);
        }

        .trending-card .trending-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            background: rgba(99,102,241,0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .trending-card .trending-info {
            flex: 1;
            min-width: 0;
        }

        .trending-card .trending-info h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 3px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .trending-card .trending-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        .trending-card .trending-tag {
            background: rgba(99,102,241,0.06);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            flex-shrink: 0;
        }

        /* ===== 平台动态列表 ===== */
        .news-list-container {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 8px 32px;
        }

        .news-list-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
            transition: all 0.25s;
        }

        .news-list-item:last-child {
            border-bottom: none;
        }

        .news-list-item:hover {
            padding-left: 8px;
        }

        .news-list-item .list-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
            color: #fff;
        }

        .list-icon.blue { background: linear-gradient(135deg, #6366f1, #818cf8); }
        .list-icon.green { background: linear-gradient(135deg, #10b981, #34d399); }
        .list-icon.orange { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
        .list-icon.pink { background: linear-gradient(135deg, #ec4899, #f472b6); }

        .news-list-item .list-body {
            flex: 1;
            min-width: 0;
        }

        .news-list-item .list-body h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
            color: var(--text);
            transition: color 0.2s;
        }

        .news-list-item:hover .list-body h3 {
            color: var(--primary);
        }

        .news-list-item .list-body p {
            font-size: 14px;
            color: var(--text-muted);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .news-list-item .list-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, #111827 0%, #1e1b4b 100%);
            padding: 60px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-item .stat-number span {
            color: var(--accent);
        }

        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255,255,255,0.65);
        }

        /* ===== FAQ ===== */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-item:hover {
            border-color: rgba(99,102,241,0.3);
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            color: var(--text);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 22px;
            color: var(--primary);
            font-weight: 400;
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 22px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 15px;
            border-top: 1px solid var(--border);
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0 80px;
        }

        .cta-box {
            background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 60%, #4f46e5 100%);
            border-radius: 24px;
            padding: 50px;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(30,27,75,0.3);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            pointer-events: none;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 25%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(245,158,11,0.12);
            pointer-events: none;
        }

        .cta-content {
            flex: 1;
            min-width: 280px;
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 15px;
            opacity: 0.8;
            max-width: 460px;
        }

        .cta-buttons {
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        .btn-cta-light {
            background: #fff;
            color: #1e1b4b;
            padding: 14px 30px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            transition: all 0.3s;
            justify-content: center;
        }

        .btn-cta-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.22);
            color: #1e1b4b;
        }

        .btn-cta-outline {
            background: transparent;
            border: 1.5px solid rgba(255,255,255,0.35);
            color: #fff;
            padding: 14px 30px;
            border-radius: 100px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s;
            justify-content: center;
        }

        .btn-cta-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand h3 i {
            color: var(--primary-light);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            color: #94a3b8;
            padding: 5px 0;
            font-size: 14px;
            transition: all 0.2s;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .footer-contact p {
            font-size: 14px;
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--primary-light);
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #64748b;
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(99,102,241,0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .trending-list {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .news-hero h1 {
                font-size: 36px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }

            .mobile-header {
                display: block;
            }

            .main-content {
                padding-top: 0;
            }

            .news-hero {
                padding: 60px 0 48px;
            }

            .news-hero h1 {
                font-size: 30px;
            }

            .section {
                padding: 50px 0;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .news-card .card-image {
                height: 180px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .cta-box {
                padding: 36px 28px;
                flex-direction: column;
                text-align: center;
            }

            .cta-content p {
                margin: 0 auto;
            }

            .cta-buttons {
                width: 100%;
            }

            .btn-cta-light,
            .btn-cta-outline {
                width: 100%;
            }

            .trending-card {
                padding: 18px;
            }

            .news-list-container {
                padding: 4px 20px;
            }

            .news-list-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 16px 0;
            }

            .news-list-item .list-body p {
                white-space: normal;
            }

            .news-list-item .list-date {
                margin-left: 70px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .stat-item .stat-number {
                font-size: 32px;
            }
        }

        @media (max-width: 520px) {
            .page-container {
                padding: 0 16px;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }

            .section-header-left h2 {
                font-size: 23px;
            }

            .news-hero {
                padding: 48px 0 36px;
            }

            .news-hero h1 {
                font-size: 26px;
            }

            .news-hero p {
                font-size: 15px;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-hero,
            .btn-hero-outline {
                text-align: center;
                justify-content: center;
            }

            .news-card .card-content {
                padding: 18px;
            }

            .news-card .card-title {
                font-size: 16px;
            }

            .tag-cloud .tag-item {
                padding: 8px 14px;
                font-size: 13px;
            }

            .trending-card {
                flex-wrap: wrap;
            }

            .trending-card .trending-tag {
                margin-left: 0;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-box {
                border-radius: 16px;
                padding: 30px 20px;
            }

            .cta-box h2 {
                font-size: 22px;
            }

            .footer {
                padding: 40px 0 20px;
            }

            .footer-bottom {
                font-size: 12px;
                line-height: 1.6;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #6d5efc;
            --primary-dark: #4f46e5;
            --primary-light: #a78bfa;
            --accent: #10b981;
            --accent-dark: #059669;
            --ink: #0f172a;
            --mist: #f8fafc;
            --border: #e2e8f0;
            --muted: #64748b;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--mist);
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        .sidebar-nav a.active {
            background: rgba(109, 94, 252, 0.12);
            color: var(--primary-dark);
            border-left: 4px solid var(--primary);
            font-weight: 600;
        }
        .sidebar-nav a {
            border-left: 4px solid transparent;
            transition: all 0.3s ease;
            border-radius: 0 0.75rem 0.75rem 0;
        }
        .sidebar-nav a:hover {
            background: rgba(109, 94, 252, 0.08);
            color: var(--primary-dark);
            padding-left: 1rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .faq-item[open] summary {
            color: var(--primary-dark);
        }
        .faq-item[open] .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-icon {
            transition: transform 0.35s ease;
        }
        .step-line::before {
            content: '';
            position: absolute;
            left: 1.75rem;
            top: 3.5rem;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--primary-light), rgba(109, 94, 252, 0.1));
        }
        @media (max-width: 1023px) {
            .step-line::before {
                display: none;
            }
        }
        .hero-bg {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.65));
        }
        .security-bg {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .security-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.88);
        }
        .focus\:ring-primary:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(109, 94, 252, 0.15);
        }
        @media (max-width: 767px) {
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .desktop-header {
                display: none;
            }
        }
        @media (min-width: 768px) {
            .mobile-header {
                display: none;
            }
            .desktop-header {
                display: flex;
            }
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 48px rgba(109, 94, 252, 0.15);
        }
        .cta-btn {
            transition: all 0.3s ease;
        }
        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(109, 94, 252, 0.35);
        }

/* roulang page: article */
:root {
            --primary: #ff6b35;
            --primary-dark: #e85a2a;
            --primary-light: #ff8a5c;
            --secondary: #1e293b;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 10px 30px rgba(0,0,0,0.06);
            --shadow-lg: 0 20px 40px rgba(0,0,0,0.10);
            --transition: all .25s ease;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        button { font-family: inherit; cursor: pointer; }
        a:focus-visible, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

        .app-wrapper { display: flex; min-height: 100vh; }

        /* 侧边栏 */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 280px;
            background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
            color: #cbd5e1;
            z-index: 50;
            display: flex;
            flex-direction: column;
            padding: 28px 22px;
        }
        .sidebar-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255,255,255,.1);
            margin-bottom: 20px;
            letter-spacing: .5px;
        }
        .sidebar-brand i { color: var(--primary); font-size: 1.6rem; }
        .sidebar-nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            color: #cbd5e1;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-nav a i { width: 20px; text-align: center; }
        .sidebar-nav a:hover {
            background: rgba(255,255,255,.08);
            color: #fff;
            transform: translateX(4px);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(255,107,53,.35);
        }
        .sidebar-contact {
            border-top: 1px solid rgba(255,255,255,.1);
            padding-top: 20px;
            font-size: .85rem;
            color: #94a3b8;
        }
        .sidebar-contact p { margin-bottom: 6px; display: flex; gap: 8px; align-items: center; }
        .sidebar-contact i { color: var(--primary); width: 16px; text-align: center; }

        .content-area {
            margin-left: 280px;
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main { flex: 1; }

        /* 移动端顶部导航 */
        .mobile-header {
            display: none;
            background: var(--secondary);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 40;
        }
        .mobile-brand { color: #fff; font-weight: 700; font-size: .95rem; }
        .mobile-menu-btn { background: none; border: none; color: #fff; font-size: 1.4rem; }
        .mobile-sidebar {
            display: none;
            background: var(--secondary);
            padding: 10px 20px 20px;
            border-top: 1px solid rgba(255,255,255,.08);
        }
        .mobile-sidebar a {
            display: block;
            padding: 12px 8px;
            color: #cbd5e1;
            border-bottom: 1px solid rgba(255,255,255,.06);
            font-weight: 500;
        }
        .mobile-sidebar a:last-child { border-bottom: none; }
        .mobile-sidebar a.active { color: var(--primary); }
        .mobile-sidebar.show { display: block; }

        @media (max-width: 1024px) {
            .sidebar { display: none; }
            .content-area { margin-left: 0; }
            .mobile-header { display: flex; }
        }

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

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: .9rem;
            color: var(--text-muted);
            padding: 28px 0 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: #94a3b8; }

        /* 文章布局 */
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0,1fr) 340px;
            gap: 32px;
            margin-bottom: 24px;
        }
        @media (max-width: 1024px) { .article-layout { grid-template-columns: 1fr; } }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-header { padding: 32px 32px 16px; }
        .badge {
            display: inline-block;
            background: rgba(255,107,53,.12);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: .8rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .article-header h1 {
            font-size: 1.8rem;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 16px;
            font-weight: 800;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: .85rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }
        .article-meta i { margin-right: 6px; color: var(--primary); }

        .article-banner {
            height: 220px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent, rgba(15,23,42,.2));
        }

        .article-content {
            padding: 32px;
            color: #334155;
            font-size: 1rem;
            line-height: 1.9;
        }
        .article-content p { margin-bottom: 1.2em; }
        .article-content h2, .article-content h3 {
            margin: 1.5em 0 .6em;
            color: var(--text);
            font-weight: 700;
        }
        .article-content img {
            border-radius: 12px;
            margin: 1.5em 0;
        }
        .article-content ul, .article-content ol { margin: 0 0 1.5em 1.5em; }
        .article-content a { color: var(--primary); text-decoration: underline; }

        .not-found {
            padding: 60px 32px;
            text-align: center;
        }
        .not-found p { font-size: 1.15rem; color: var(--text-muted); margin-bottom: 8px; }
        .not-found .btn-primary { margin-top: 20px; }

        /* 侧边卡片 */
        .aside-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-bottom: 24px;
        }
        .aside-img { border-radius: 12px; margin-bottom: 16px; }
        .aside-card h3 { font-size: 1.05rem; margin-bottom: 8px; font-weight: 700; }
        .aside-card h4 { font-size: 1rem; margin-bottom: 12px; color: var(--text); font-weight: 700; }
        .aside-card p { font-size: .9rem; color: var(--text-muted); margin-bottom: 14px; }

        .aside-links { list-style: none; }
        .aside-links li { border-bottom: 1px solid var(--border); }
        .aside-links li:last-child { border-bottom: none; }
        .aside-links a {
            display: block;
            padding: 12px 4px;
            color: var(--text);
            transition: var(--transition);
        }
        .aside-links a:hover { color: var(--primary); padding-left: 10px; }
        .aside-links i { margin-right: 8px; color: var(--primary); }

        .cta-card {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border: none;
        }
        .cta-card h4 { color: #fff; }
        .cta-card p { color: rgba(255,255,255,.85); }
        .cta-card .btn-primary { background: #fff; color: var(--primary); }

        /* 按钮 */
        .btn-primary, .btn-secondary, .btn-white, .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: 30px;
            font-weight: 600;
            font-size: .95rem;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(255,107,53,.25);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: rgba(255,107,53,.1);
            color: var(--primary);
            border: 1px solid rgba(255,107,53,.2);
        }
        .btn-secondary:hover { background: var(--primary); color: #fff; }
        .btn-white { background: #fff; color: var(--secondary); }
        .btn-white:hover { background: var(--primary); color: #fff; }
        .btn-outline-white {
            border: 2px solid #fff;
            color: #fff;
            padding: 8px 24px;
            background: transparent;
        }
        .btn-outline-white:hover { background: #fff; color: var(--secondary); }

        /* 常见问题 */
        .faq-section {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px;
            margin: 32px 0 40px;
        }
        .faq-section h3 { font-size: 1.3rem; margin-bottom: 20px; font-weight: 800; }
        .faq-item { border-bottom: 1px solid var(--border); padding: 16px 0; }
        .faq-item:last-child { border-bottom: none; }
        .faq-item h4 { font-weight: 600; margin-bottom: 6px; font-size: 1rem; }
        .faq-item p { color: var(--text-muted); font-size: .92rem; }

        /* CTA */
        .cta-section {
            background-size: cover;
            background-position: center;
            border-radius: 24px;
            padding: 56px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            margin: 40px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15,23,42,.72);
            border-radius: 24px;
        }
        .cta-section h2, .cta-section p, .cta-section .btn-white, .cta-section .btn-outline-white {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 { font-size: 2rem; margin-bottom: 12px; font-weight: 800; }
        .cta-section p { max-width: 600px; margin: 0 auto 24px; opacity: .9; }
        .cta-section .btn-white, .cta-section .btn-outline-white { margin: 0 8px; }

        /* 页脚 */
        .footer {
            background: var(--secondary);
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand h3 { color: #fff; font-size: 1.2rem; margin-bottom: 12px; }
        .footer-brand p { font-size: .9rem; color: #94a3b8; max-width: 320px; }
        .footer-links { display: flex; flex-direction: column; gap: 8px; }
        .footer-links h4, .footer-contact h4 { color: #fff; margin-bottom: 10px; font-size: 1rem; }
        .footer-links a { color: #94a3b8; transition: var(--transition); font-size: .9rem; }
        .footer-links a:hover { color: var(--primary); }
        .footer-contact p { font-size: .9rem; margin-bottom: 8px; color: #94a3b8; }
        .footer-contact i { margin-right: 8px; color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.08);
            margin-top: 32px;
            padding-top: 24px;
            text-align: center;
            font-size: .85rem;
            color: #94a3b8;
        }
        @media (max-width:768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .article-header { padding: 24px 20px 12px; }
            .article-header h1 { font-size: 1.4rem; }
            .article-content { padding: 20px; }
            .cta-section { padding: 40px 20px; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section .btn-white, .cta-section .btn-outline-white { display: block; margin: 10px auto; max-width: 220px; }
            .faq-section { padding: 24px 20px; }
        }
        @media (max-width:520px) {
            .page-container { padding: 0 16px; }
            .article-meta { gap: 10px; }
            .article-layout { grid-template-columns: 1fr; }
            .breadcrumb { font-size: .8rem; padding: 16px 0 12px; }
        }