/* roulang page: index */
:root {
            --color-primary: #1e40af;
            --color-primary-light: #2563eb;
            --color-accent: #f59e0b;
            --color-accent-hover: #d97706;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-muted: #64748b;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 10px -4px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.1), 0 8px 16px -6px rgba(0, 0, 0, 0.05);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-lg);
        }

        .nav-brand {
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-brand-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, #2563eb, #1e40af);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            padding: 0.5rem 0.9rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--color-primary);
            background: #eff6ff;
        }

        .nav-link.active {
            color: var(--color-primary);
            background: #eff6ff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0.9rem;
            right: 0.9rem;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px 2px 0 0;
        }

        .nav-search-btn {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            background: #f8fafc;
            border: 1px solid var(--color-border);
            border-radius: 2rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .nav-search-btn:hover {
            border-color: #cbd5e1;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        /* 移动端导航 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0.5rem;
            color: var(--color-text);
            font-size: 1.4rem;
            line-height: 1;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 49;
            flex-direction: column;
            padding: 5rem 1.5rem 2rem;
            gap: 0.25rem;
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            font-size: 1.05rem;
            padding: 0.85rem 1rem;
            border-radius: var(--radius-md);
            display: block;
        }

        .mobile-menu .nav-link.active {
            background: #eff6ff;
        }

        .mobile-menu-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--color-text);
            padding: 0.5rem;
            line-height: 1;
        }

        /* Hero */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.78) 50%, rgba(15, 23, 42, 0.85) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #e2e8f0;
            padding: 0.4rem 1rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
        }

        .hero-badge-dot {
            width: 7px;
            height: 7px;
            background: #10b981;
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
            }
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: #ffffff;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            color: #cbd5e1;
            line-height: 1.6;
            max-width: 600px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
            text-decoration: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #1d4ed8, #1e40af);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: #fff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
        }

        .hero-stat-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 1rem 1.5rem;
            backdrop-filter: blur(6px);
            color: #fff;
            text-align: center;
        }

        .hero-stat-value {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fbbf24;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: #94a3b8;
            margin-top: 0.15rem;
        }

        /* 板块通用 */
        .section-padding {
            padding: 4rem 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            background: #eff6ff;
            padding: 0.35rem 0.9rem;
            border-radius: 2rem;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin-bottom: 0.75rem;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 640px;
            margin: 0 auto;
        }

        /* 卡片 */
        .feature-card {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #dbeafe;
            transform: translateY(-3px);
        }

        .feature-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 1.25rem;
            flex-shrink: 0;
        }

        .feature-card-icon.blue {
            background: #eff6ff;
            color: #2563eb;
        }
        .feature-card-icon.green {
            background: #ecfdf5;
            color: #059669;
        }
        .feature-card-icon.amber {
            background: #fffbeb;
            color: #d97706;
        }

        /* 分类卡片 */
        .category-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            cursor: pointer;
            transition: all var(--transition-base);
            aspect-ratio: 4/3;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-md);
        }

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

        .category-card-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .category-card:hover .category-card-img {
            transform: scale(1.06);
        }

        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.3) 50%, rgba(15, 23, 42, 0.05) 100%);
            z-index: 1;
        }

        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 1.5rem;
            width: 100%;
            color: #fff;
        }

        .category-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(255, 255, 255, 0.2);
            padding: 0.25rem 0.7rem;
            border-radius: 2rem;
            margin-bottom: 0.5rem;
            backdrop-filter: blur(4px);
        }

        .category-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        .category-card-desc {
            font-size: 0.85rem;
            color: #cbd5e1;
            line-height: 1.4;
        }

        /* 列表卡片 */
        .info-list-item {
            display: flex;
            gap: 1rem;
            padding: 1.25rem 1rem;
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            border-radius: var(--radius-sm);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }

        .info-list-item:hover {
            background: #f8fafc;
            border-bottom-color: #dbeafe;
        }

        .info-list-thumb {
            width: 80px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: #f1f5f9;
        }

        .info-list-content {
            flex: 1;
            min-width: 0;
        }

        .info-list-title {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text);
            margin-bottom: 0.3rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-list-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 1rem;
            align-items: center;
        }

        .info-list-badge {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 0.2rem 0.55rem;
            border-radius: 2rem;
            background: #eff6ff;
            color: #2563eb;
            white-space: nowrap;
        }

        /* 数据带 */
        .stats-band {
            background: var(--color-bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            position: relative;
        }

        .stats-band-overlay {
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.9);
            z-index: 1;
        }

        .stats-band-content {
            position: relative;
            z-index: 2;
        }

        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }

        .stat-number {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: #fbbf24;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.9rem;
            color: #94a3b8;
            margin-top: 0.3rem;
        }

        /* 流程 */
        .step-card {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 1.75rem 1.5rem;
            position: relative;
            transition: all var(--transition-base);
        }

        .step-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #dbeafe;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #2563eb, #1e40af);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all var(--transition-fast);
            background: #fff;
        }

        .faq-item:hover {
            border-color: #dbeafe;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            padding: 1.1rem 1.25rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            line-height: 1.5;
        }

        .faq-question i {
            transition: transform var(--transition-base);
            color: var(--color-text-muted);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 1.25rem 1.25rem;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 50%, #172554 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: #1e293b;
            background: #f59e0b;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            text-decoration: none;
        }

        .btn-accent:hover {
            background: #fbbf24;
            box-shadow: 0 6px 22px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }

        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: #fff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.7);
        }

        /* 页脚 */
        .site-footer {
            background: #f8fafc;
            border-top: 1px solid var(--color-border);
            padding: 3rem 0 1.5rem;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-primary);
        }

        .footer-link {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

        .footer-link:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border-light);
            padding-top: 1.25rem;
            margin-top: 2rem;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            text-align: center;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-section {
                min-height: 480px;
            }
            .hero-stat-card {
                padding: 0.8rem 1rem;
            }
            .hero-stat-value {
                font-size: 1.3rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav-links {
                display: none !important;
            }
            .desktop-search {
                display: none !important;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-section {
                min-height: 420px;
                text-align: center;
            }
            .hero-subtitle {
                margin: 0 auto;
            }
            .hero-stats-row {
                justify-content: center;
            }
            .hero-buttons {
                justify-content: center;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .category-card {
                aspect-ratio: 16/10;
                min-height: 200px;
            }
            .info-list-item {
                flex-direction: column;
            }
            .info-list-thumb {
                width: 100%;
                height: 140px;
                border-radius: var(--radius-sm);
            }
            .stats-band {
                background-attachment: scroll;
            }
            .stat-item {
                padding: 1rem 0.5rem;
            }
            .stat-number {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                min-height: 380px;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 0.6rem 1.2rem;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 0.6rem;
            }
            .hero-stats-row {
                flex-wrap: wrap;
                gap: 0.5rem;
            }
            .hero-stat-card {
                flex: 1 1 45%;
                min-width: 80px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .category-card {
                aspect-ratio: 3/2;
                min-height: 180px;
            }
            .step-card {
                padding: 1.25rem 1rem;
            }
            .faq-question {
                font-size: 0.85rem;
                padding: 0.9rem 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* 无障碍 */
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid #3b82f6;
            outline-offset: 2px;
            border-radius: 2px;
        }

        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }

        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--color-text-muted);
            background: #f8fafc;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: #cbd5e1;
        }

/* roulang page: category1 */
:root {
            --color-brand: #4f46e5;
            --color-brand-dark: #3730a3;
            --color-brand-light: #eef2ff;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-text: #1e293b;
            --color-text-muted: #64748b;
            --color-text-weak: #94a3b8;
            --color-border: #e2e8f0;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.04), 0 1px 2px -1px rgba(0,0,0,0.03);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.04);
            --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            font-size: 16px;
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid transparent;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-sm);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            border-bottom-color: var(--color-border);
            background: rgba(255, 255, 255, 0.97);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-brand);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-brand:hover {
            color: var(--color-brand-dark);
        }

        .nav-brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2rem;
            height: 2rem;
            background: linear-gradient(135deg, var(--color-brand), var(--color-brand-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 0.875rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--color-brand);
            background: var(--color-brand-light);
        }

        .nav-link.active {
            color: var(--color-brand);
            font-weight: 600;
            background: var(--color-brand-light);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--color-brand);
            border-radius: 2px;
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 0.9rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-muted);
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .nav-search-btn:hover {
            border-color: var(--color-brand);
            color: var(--color-brand);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .mobile-menu-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-size: 1.2rem;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: var(--color-bg-alt);
            border-color: var(--color-brand);
            color: var(--color-brand);
        }

        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            max-width: 85vw;
            height: 100vh;
            background: #fff;
            z-index: 200;
            box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
            transform: translateX(100%);
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 1.5rem;
            overflow-y: auto;
        }

        .mobile-menu-panel.open {
            transform: translateX(0);
        }

        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 199;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .mobile-menu-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu-close {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.25rem;
            height: 2.25rem;
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-size: 1rem;
            margin-bottom: 1.25rem;
            transition: all var(--transition-fast);
        }

        .mobile-menu-close:hover {
            background: #fee2e2;
            border-color: #fecaca;
            color: #dc2626;
        }

        .mobile-nav-link {
            display: block;
            padding: 0.75rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            margin-bottom: 0.25rem;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: var(--color-brand-light);
            color: var(--color-brand);
            font-weight: 600;
        }

        /* ========== Category Banner ========== */
        .category-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 4rem 0;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 41, 59, 0.88) 0%, rgba(30, 41, 59, 0.7) 40%, rgba(55, 48, 163, 0.65) 100%);
            z-index: 1;
        }

        .category-banner-content {
            position: relative;
            z-index: 2;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb-separator {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.7rem;
        }

        .breadcrumb-current {
            color: #fff;
            font-weight: 500;
        }

        /* ========== Article Cards ========== */
        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #c7d2fe;
        }

        .article-card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-bg-alt);
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .article-card:hover .article-card-image img {
            transform: scale(1.04);
        }

        .article-card-body {
            padding: 1.25rem 1.25rem 1rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin-bottom: 0.75rem;
        }

        .article-tag {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--color-brand);
            background: var(--color-brand-light);
            border-radius: 9999px;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .article-tag:hover {
            background: #c7d2fe;
            color: var(--color-brand-dark);
        }

        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-card-title {
            color: var(--color-brand);
        }

        .article-card-excerpt {
            font-size: 0.875rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 0.75rem;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-weak);
            padding-top: 0.75rem;
            border-top: 1px solid var(--color-border);
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .article-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* ========== Pagination ========== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.35rem;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 2.5rem;
            height: 2.5rem;
            padding: 0 0.5rem;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .pagination a {
            color: var(--color-text);
            background: #fff;
            border-color: var(--color-border);
        }

        .pagination a:hover {
            background: var(--color-brand-light);
            border-color: var(--color-brand);
            color: var(--color-brand);
        }

        .pagination .current {
            background: var(--color-brand);
            color: #fff;
            border-color: var(--color-brand);
            font-weight: 600;
            pointer-events: none;
        }

        .pagination .disabled {
            color: var(--color-text-weak);
            background: var(--color-bg-alt);
            border-color: var(--color-border);
            pointer-events: none;
            opacity: 0.5;
        }

        /* ========== Sidebar Card ========== */
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 1.25rem;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.875rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--color-brand-light);
        }

        .sidebar-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .sidebar-tag-cloud .article-tag {
            font-size: 0.78rem;
            padding: 0.3rem 0.7rem;
            cursor: pointer;
        }

        .sidebar-list-item {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            padding: 0.6rem 0;
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

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

        .sidebar-list-item:hover {
            color: var(--color-brand);
        }

        .sidebar-list-item .list-number {
            flex-shrink: 0;
            width: 1.5rem;
            height: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            color: #fff;
            background: var(--color-brand);
            border-radius: 4px;
        }

        .sidebar-list-item .list-title {
            font-size: 0.85rem;
            font-weight: 500;
            line-height: 1.4;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: linear-gradient(135deg, #1e293b 0%, #312e81 100%);
            border-radius: var(--radius-xl);
            overflow: hidden;
            position: relative;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: rgba(99, 102, 241, 0.2);
            border-radius: 50%;
            pointer-events: none;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 0 0;
            margin-top: 3rem;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .footer-link {
            font-size: 0.875rem;
            color: #94a3b8;
            transition: color var(--transition-fast);
            cursor: pointer;
        }

        a.footer-link:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding: 1.5rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        .footer-grid {
            row-gap: 2rem;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .category-banner {
                padding: 3rem 0;
            }
            .article-card-title {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 2.5rem 0;
            }
            .category-banner h1 {
                font-size: 1.6rem;
            }
            .article-card-body {
                padding: 1rem;
            }
            .article-card-title {
                font-size: 0.9rem;
            }
            .article-card-excerpt {
                font-size: 0.8rem;
                -webkit-line-clamp: 2;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .cta-section {
                border-radius: var(--radius-lg);
            }
        }

        @media (max-width: 520px) {
            .category-banner {
                padding: 2rem 0;
            }
            .category-banner h1 {
                font-size: 1.35rem;
            }
            .category-banner p {
                font-size: 0.85rem;
            }
            .article-card-image {
                aspect-ratio: 16 / 9;
            }
            .pagination a,
            .pagination span {
                min-width: 2rem;
                height: 2rem;
                font-size: 0.8rem;
            }
            .sidebar-card {
                padding: 1rem;
            }
        }

        @media (max-width: 380px) {
            .nav-brand {
                font-size: 1rem;
            }
            .nav-brand-icon {
                width: 1.6rem;
                height: 1.6rem;
                font-size: 0.75rem;
            }
            .article-card-meta {
                font-size: 0.7rem;
                flex-direction: column;
                align-items: flex-start;
                gap: 0.3rem;
            }
        }

/* roulang page: article */
:root {
            --color-brand: #2563eb;
            --color-brand-hover: #1d4ed8;
            --color-brand-light: #dbeafe;
            --color-accent: #14b8a6;
            --color-accent-light: #ccfbf1;
            --color-surface: #0f172a;
            --color-surface-light: #1e293b;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-border: #e2e8f0;
            --color-bg: #f8fafc;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.2s ease;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
        body{font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.7;color:var(--color-text);background:var(--color-bg);overflow-x:hidden}
        a{text-decoration:none;color:inherit;transition:color var(--transition)}
        img{max-width:100%;height:auto;display:block}
        button{cursor:pointer;border:none;background:none;font:inherit}
        input,textarea{font:inherit}

        /* 吸顶导航 */
        .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid transparent;transition:all var(--transition)}
        .site-header.scrolled{border-bottom-color:var(--color-border);box-shadow:var(--shadow-sm)}
        .nav-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--color-surface);letter-spacing:-0.01em;white-space:nowrap}
        .nav-brand-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--color-brand);color:#fff;border-radius:var(--radius-sm);font-size:0.95rem}
        .nav-link{position:relative;padding:8px 14px;font-size:0.9rem;font-weight:500;color:var(--color-text-weak);border-radius:var(--radius-sm);transition:all var(--transition);white-space:nowrap}
        .nav-link:hover{color:var(--color-brand);background:var(--color-brand-light)}
        .nav-link.active{color:var(--color-brand);background:var(--color-brand-light);font-weight:600}
        .nav-link.active::after{content:'';position:absolute;bottom:-1px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--color-brand);border-radius:0 0 3px 3px}
        .nav-search-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;font-size:0.85rem;color:var(--color-text-weak);background:var(--color-bg);border:1px solid var(--color-border);border-radius:999px;transition:all var(--transition);white-space:nowrap}
        .nav-search-btn:hover{color:var(--color-brand);border-color:var(--color-brand);background:#fff;box-shadow:var(--shadow-sm)}

        /* 移动端菜单 */
        .mobile-menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;font-size:1.3rem;color:var(--color-text);border-radius:var(--radius-sm);transition:all var(--transition)}
        .mobile-menu-toggle:hover{background:var(--color-brand-light);color:var(--color-brand)}
        .mobile-menu-panel{display:none;position:fixed;top:64px;left:0;right:0;bottom:0;z-index:99;background:rgba(255,255,255,0.98);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:20px;overflow-y:auto;flex-direction:column;gap:4px}
        .mobile-menu-panel.open{display:flex}
        .mobile-menu-panel .nav-link{display:block;padding:14px 16px;font-size:1rem;border-radius:var(--radius);text-align:center}
        .mobile-menu-panel .nav-link.active{background:var(--color-brand);color:#fff}
        .mobile-menu-panel .nav-link.active::after{display:none}

        /* 文章Banner */
        .article-banner{position:relative;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 50%,#0f1d4a 100%);background-size:cover;background-position:center;background-image:url('/assets/images/backpic/back-1.png');background-blend-mode:overlay;padding:56px 0 48px;color:#fff;overflow:hidden}
        .article-banner::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,0.55) 0%,rgba(15,23,42,0.8) 100%);z-index:1}
        .article-banner>*{position:relative;z-index:2}
        .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:0.85rem;color:rgba(255,255,255,0.7)}
        .breadcrumb a{color:rgba(255,255,255,0.85);transition:color var(--transition)}
        .breadcrumb a:hover{color:#fff}
        .breadcrumb .divider{color:rgba(255,255,255,0.4);font-size:0.7rem}
        .article-meta-tag{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;background:rgba(255,255,255,0.15);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.2);border-radius:999px;font-size:0.8rem;font-weight:500;color:#fff;letter-spacing:0.02em}
        .article-meta-tag i{font-size:0.7rem;color:#93c5fd}

        /* 正文排版 */
        .article-body{font-size:1.05rem;line-height:1.85;color:var(--color-text)}
        .article-body h2{font-size:1.6rem;font-weight:700;color:var(--color-surface);margin:2em 0 0.8em;padding-bottom:0.4em;border-bottom:2px solid var(--color-brand-light)}
        .article-body h3{font-size:1.25rem;font-weight:600;color:var(--color-surface);margin:1.6em 0 0.6em}
        .article-body p{margin-bottom:1.2em}
        .article-body ul,.article-body ol{margin:1em 0 1.2em 1.5em}
        .article-body li{margin-bottom:0.5em}
        .article-body blockquote{margin:1.5em 0;padding:16px 24px;background:var(--color-brand-light);border-left:4px solid var(--color-brand);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--color-text);font-style:italic}
        .article-body code{background:#f1f5f9;padding:2px 8px;border-radius:4px;font-size:0.9em;color:#1e40af}
        .article-body pre{background:#1e293b;color:#e2e8f0;padding:20px 24px;border-radius:var(--radius);overflow-x:auto;margin:1.5em 0;font-size:0.9em;line-height:1.6}
        .article-body img{border-radius:var(--radius);margin:1.5em auto;box-shadow:var(--shadow)}
        .article-body a{color:var(--color-brand);text-decoration:underline;text-underline-offset:3px}
        .article-body a:hover{color:var(--color-brand-hover)}
        .article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;border-radius:var(--radius-sm);overflow:hidden}
        .article-body th{background:var(--color-surface);color:#fff;padding:12px 16px;font-weight:600;text-align:left}
        .article-body td{padding:10px 16px;border-bottom:1px solid var(--color-border)}
        .article-body tr:nth-child(even) td{background:#f8fafc}

        /* 侧边栏 */
        .sidebar-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--color-border);margin-bottom:20px}
        .sidebar-card h4{font-size:0.95rem;font-weight:700;color:var(--color-surface);margin-bottom:14px;display:flex;align-items:center;gap:8px}
        .sidebar-card h4::before{content:'';display:block;width:4px;height:18px;background:var(--color-brand);border-radius:2px}
        .sidebar-link{display:flex;align-items:flex-start;gap:10px;padding:10px 0;border-bottom:1px solid #f1f5f9;transition:all var(--transition)}
        .sidebar-link:last-child{border-bottom:none}
        .sidebar-link:hover{color:var(--color-brand)}
        .sidebar-link .dot{flex-shrink:0;width:6px;height:6px;background:var(--color-accent);border-radius:50%;margin-top:7px}
        .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
        .tag-item{padding:5px 13px;background:#f1f5f9;border-radius:999px;font-size:0.8rem;color:var(--color-text-weak);transition:all var(--transition);white-space:nowrap}
        .tag-item:hover{background:var(--color-brand-light);color:var(--color-brand)}

        /* 相关文章卡片 */
        .related-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--color-border);transition:all var(--transition);display:flex;flex-direction:column}
        .related-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--color-brand-light)}
        .related-card-img{height:180px;overflow:hidden;position:relative;background:#e2e8f0}
        .related-card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
        .related-card:hover .related-card-img img{transform:scale(1.05)}
        .related-card-body{padding:18px;flex:1;display:flex;flex-direction:column}
        .related-card-body h5{font-size:1rem;font-weight:600;color:var(--color-surface);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-card-body p{font-size:0.85rem;color:var(--color-text-weak);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
        .related-card-meta{font-size:0.75rem;color:var(--color-text-weak);margin-top:10px;padding-top:10px;border-top:1px solid #f1f5f9}

        /* CTA */
        .cta-section{background:linear-gradient(135deg,#1e3a8a 0%,#0f172a 100%);position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;top:-60px;right:-60px;width:200px;height:200px;background:rgba(59,130,246,0.15);border-radius:50%;pointer-events:none}
        .cta-section::after{content:'';position:absolute;bottom:-40px;left:-40px;width:140px;height:140px;background:rgba(20,184,166,0.12);border-radius:50%;pointer-events:none}
        .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;background:var(--color-brand);color:#fff;font-weight:600;font-size:0.95rem;border-radius:999px;transition:all var(--transition);box-shadow:0 4px 16px rgba(37,99,235,0.3);white-space:nowrap}
        .btn-primary:hover{background:var(--color-brand-hover);box-shadow:0 8px 28px rgba(37,99,235,0.4);transform:translateY(-1px)}
        .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border:2px solid rgba(255,255,255,0.4);color:#fff;font-weight:600;font-size:0.9rem;border-radius:999px;transition:all var(--transition);white-space:nowrap}
        .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff}

        /* 页脚 */
        .site-footer{background:var(--color-surface);color:#cbd5e1;padding:48px 0 28px;font-size:0.88rem}
        .footer-brand{font-size:1.2rem;font-weight:700;color:#fff}
        .footer-link{color:#94a3b8;transition:color var(--transition);display:inline-block;padding:2px 0}
        .footer-link:hover{color:#fff}
        .footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,0.1);text-align:center;color:#64748b;font-size:0.8rem}

        /* 响应式 */
        @media(max-width:1024px){
            .article-body{font-size:1rem}
        }
        @media(max-width:768px){
            .desktop-nav-links,.desktop-search{display:none!important}
            .mobile-menu-toggle{display:flex}
            .article-banner{padding:40px 0 32px}
            .article-banner h1{font-size:1.5rem!important}
            .sidebar-card{padding:18px}
            .related-card-img{height:150px}
        }
        @media(max-width:520px){
            .nav-brand{font-size:1rem;gap:6px}
            .nav-brand-icon{width:32px;height:32px;font-size:0.8rem}
            .article-banner{padding:32px 0 24px}
            .article-body{font-size:0.95rem}
            .article-body h2{font-size:1.3rem}
            .btn-primary,.btn-outline{width:100%;justify-content:center}
            .related-card-img{height:180px}
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #2563eb;
            --color-primary-hover: #1d4ed8;
            --color-primary-light: #dbeafe;
            --color-accent: #06b6d4;
            --color-accent-light: #cffafe;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.10), 0 8px 10px -6px rgba(0,0,0,0.05);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 250ms cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            font-size: inherit;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        /* ========== 导航栏 - 吸顶 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #1e293b;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .nav-brand:hover {
            opacity: 0.85;
        }

        .nav-brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
            color: #ffffff;
            border-radius: 0.625rem;
            font-size: 0.9rem;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.4rem 0.875rem;
            border-radius: 0.5rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: #475569;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: #1e293b;
            background-color: #f1f5f9;
        }

        .nav-link.active {
            color: #2563eb;
            background-color: #eff6ff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: #2563eb;
            border-radius: 1px;
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 0.9rem;
            border-radius: 0.5rem;
            font-size: 0.85rem;
            color: #64748b;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-search-btn:hover {
            border-color: #cbd5e1;
            background: #f1f5f9;
            color: #475569;
        }

        .mobile-menu-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 0.5rem;
            background: transparent;
            color: #475569;
            font-size: 1.2rem;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: #f1f5f9;
            color: #1e293b;
        }

        .mobile-menu-toggle:focus-visible {
            outline: 2px solid #2563eb;
            outline-offset: 2px;
            border-radius: 0.5rem;
        }

        /* 移动端菜单面板 */
        .mobile-menu-panel {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #ffffff;
            border-bottom: 1px solid #e2e8f0;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            padding: 1rem 1.5rem 1.5rem;
            z-index: 99;
            flex-direction: column;
            gap: 0.5rem;
        }

        .mobile-menu-panel.is-open {
            display: flex;
        }

        .mobile-menu-panel .nav-link {
            display: block;
            padding: 0.7rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.95rem;
            width: 100%;
        }

        .mobile-menu-panel .nav-search-btn {
            width: 100%;
            justify-content: center;
            margin-top: 0.5rem;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: #94a3b8;
        }

        .breadcrumb a {
            color: #64748b;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: #2563eb;
        }

        .breadcrumb .separator {
            color: #cbd5e1;
            user-select: none;
        }

        .breadcrumb .current {
            color: #2563eb;
            font-weight: 500;
        }

        /* ========== Banner ========== */
        .category-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 3.5rem 0;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(15, 23, 42, 0.88) 0%,
                    rgba(30, 41, 59, 0.78) 50%,
                    rgba(15, 23, 42, 0.85) 100%);
            z-index: 1;
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
        }

        /* ========== 文章卡片 ========== */
        .article-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
            border-color: #cbd5e1;
        }

        .article-card-image {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #f1f5f9;
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .article-card-image img {
            transform: scale(1.04);
        }

        .article-card-body {
            padding: 1.25rem 1.35rem 1.35rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.78rem;
            color: #94a3b8;
            margin-bottom: 0.5rem;
            flex-wrap: wrap;
        }

        .article-card-title {
            font-size: 1.05rem;
            font-weight: 650;
            color: #1e293b;
            line-height: 1.45;
            margin-bottom: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-card-title {
            color: #2563eb;
        }

        .article-card-excerpt {
            font-size: 0.875rem;
            color: #64748b;
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.9rem;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.5rem;
            padding-top: 0.75rem;
            border-top: 1px solid #f1f5f9;
            flex-wrap: wrap;
        }

        /* ========== 标签/徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.6rem;
            border-radius: 9999px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .badge-primary {
            background: #eff6ff;
            color: #2563eb;
        }

        .badge-success {
            background: #ecfdf5;
            color: #059669;
        }

        .badge-warning {
            background: #fffbeb;
            color: #d97706;
        }

        .badge-accent {
            background: #ecfeff;
            color: #0891b2;
        }

        .level-badge {
            display: inline-flex;
            align-items: center;
            padding: 0.18rem 0.55rem;
            border-radius: 0.375rem;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .level-beginner {
            background: #f0fdf4;
            color: #16a34a;
            border: 1px solid #bbf7d0;
        }

        .level-intermediate {
            background: #eff6ff;
            color: #2563eb;
            border: 1px solid #bfdbfe;
        }

        .level-advanced {
            background: #fefce8;
            color: #ca8a04;
            border: 1px solid #fef08a;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.875rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
            border: 1px solid transparent;
            text-decoration: none;
        }

        .btn:focus-visible {
            outline: 2px solid #2563eb;
            outline-offset: 2px;
        }

        .btn-primary {
            background: #2563eb;
            color: #ffffff;
            border-color: #2563eb;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
        }

        .btn-primary:hover {
            background: #1d4ed8;
            border-color: #1d4ed8;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: #2563eb;
            border-color: #2563eb;
        }

        .btn-outline:hover {
            background: #eff6ff;
            border-color: #1d4ed8;
            color: #1d4ed8;
        }

        .btn-ghost {
            background: transparent;
            color: #475569;
            border-color: transparent;
        }

        .btn-ghost:hover {
            background: #f1f5f9;
            color: #1e293b;
        }

        .btn-sm {
            padding: 0.35rem 0.8rem;
            font-size: 0.78rem;
            border-radius: 0.5rem;
        }

        .btn-lg {
            padding: 0.75rem 1.75rem;
            font-size: 1rem;
            border-radius: var(--radius-lg);
        }

        /* ========== 安全指标卡片 ========== */
        .stat-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: center;
            transition: all var(--transition-smooth);
            backdrop-filter: blur(4px);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }

        .stat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 0.75rem;
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
            background: rgba(37, 99, 235, 0.2);
            color: #60a5fa;
        }

        /* ========== 流程步骤 ========== */
        .step-connector {
            position: relative;
        }

        .step-connector::after {
            content: '';
            position: absolute;
            top: 2rem;
            left: calc(50% + 2rem);
            width: calc(100% - 4rem);
            height: 2px;
            background: linear-gradient(90deg, #2563eb 0%, #06b6d4 100%);
            z-index: 0;
        }

        @media (max-width: 767px) {
            .step-connector::after {
                display: none;
            }
        }

        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.1rem;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            margin-bottom: 0.75rem;
            transition: transform var(--transition-fast);
        }

        .step-item:hover .step-number {
            transform: scale(1.1);
        }

        /* ========== FAQ 手风琴 ========== */
        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #ffffff;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #cbd5e1;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 1.1rem 1.25rem;
            background: transparent;
            font-weight: 600;
            font-size: 0.95rem;
            color: #1e293b;
            text-align: left;
            cursor: pointer;
            transition: all var(--transition-fast);
            gap: 1rem;
        }

        .faq-question:hover {
            background: #f8fafc;
            color: #2563eb;
        }

        .faq-question:focus-visible {
            outline: 2px solid #2563eb;
            outline-offset: -2px;
            border-radius: var(--radius-md);
        }

        .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            color: #94a3b8;
            font-size: 0.8rem;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            color: #2563eb;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 1.25rem 1.1rem;
            font-size: 0.875rem;
            color: #64748b;
            line-height: 1.7;
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 40%, #2563eb 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #ffffff;
            border-top: 1px solid #e2e8f0;
            padding: 3rem 0 1.5rem;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: #1e293b;
        }

        .footer-link {
            font-size: 0.85rem;
            color: #64748b;
            transition: color var(--transition-fast);
            display: inline-block;
            cursor: pointer;
        }

        a.footer-link:hover {
            color: #2563eb;
        }

        .footer-grid {
            gap: 2rem;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #f1f5f9;
            text-align: center;
            font-size: 0.8rem;
            color: #94a3b8;
            line-height: 1.6;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .category-banner {
                padding: 2.5rem 0;
            }
            .stat-card {
                padding: 1.2rem;
            }
            .stat-icon {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav-links,
            .desktop-search {
                display: none !important;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .category-banner {
                padding: 2rem 0;
                text-align: center;
            }
            .category-banner h1 {
                font-size: 1.6rem !important;
            }
            .stat-card {
                padding: 1rem;
            }
            .article-card-body {
                padding: 1rem 1.1rem 1.1rem;
            }
            .article-card-title {
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr) !important;
                gap: 1.5rem;
            }
            .step-connector .grid {
                gap: 1rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 1.35rem !important;
            }
            .category-banner p {
                font-size: 0.85rem !important;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr !important;
            }
            .btn-lg {
                padding: 0.6rem 1.25rem;
                font-size: 0.9rem;
            }
            .article-card-meta {
                font-size: 0.7rem;
                gap: 0.4rem;
            }
            .badge {
                font-size: 0.65rem;
                padding: 0.15rem 0.45rem;
            }
            .stat-card .text-3xl {
                font-size: 1.4rem !important;
            }
            .stat-card .text-sm {
                font-size: 0.72rem !important;
            }
        }

        /* 打印样式 */
        @media print {
            .site-header,
            .site-footer,
            .mobile-menu-panel,
            .mobile-menu-toggle,
            .nav-search-btn,
            .cta-section {
                display: none !important;
            }
            body {
                background: #fff;
                color: #000;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #3b82f6;
            --color-accent: #06b6d4;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        button {
            font-size: inherit;
        }

        /* ========== HEADER / NAVIGATION ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-text);
            text-decoration: none;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .nav-brand:hover {
            color: var(--color-primary);
        }
        .nav-brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, #2563eb, #06b6d4);
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .desktop-nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background-color: #eff6ff;
        }
        .nav-link.active {
            color: var(--color-primary);
            background-color: #eff6ff;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background-color: var(--color-primary);
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-md);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            background-color: #f8fafc;
            border: 1px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-search-btn:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background-color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .nav-search-btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-md);
        }

        .mobile-menu-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: #fff;
            color: var(--color-text);
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background-color: #f8fafc;
            border-color: #cbd5e1;
        }
        .mobile-menu-toggle:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        .mobile-menu-toggle[aria-expanded="true"] {
            background-color: #eff6ff;
            border-color: var(--color-primary-light);
            color: var(--color-primary);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            background: linear-gradient(160deg, #0f172a 0%, #1e3a8a 40%, #1e40af 100%);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(59, 130, 246, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(6, 182, 212, 0.15) 0%, transparent 55%);
            pointer-events: none;
        }
        .page-banner .banner-pattern {
            position: absolute;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
        }

        /* ========== FAQ ITEMS ========== */
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-md);
        }
        .faq-item.active {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-lg);
            background: #fafcff;
        }
        .faq-item-question {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--color-text);
            user-select: none;
            transition: color var(--transition-fast);
        }
        .faq-item.active .faq-item-question {
            color: var(--color-primary);
        }
        .faq-item-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #eff6ff;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            transition: all var(--transition-base);
        }
        .faq-item.active .faq-item-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(0deg);
        }
        .faq-item-toggle {
            margin-left: auto;
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f1f5f9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-base);
        }
        .faq-item.active .faq-item-toggle {
            background: #dbeafe;
            color: var(--color-primary);
            transform: rotate(180deg);
        }
        .faq-item-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
        }
        .faq-item.active .faq-item-answer {
            max-height: 500px;
        }
        .faq-item-answer-inner {
            padding: 0 24px 24px 70px;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ========== HELP CARD ========== */
        .help-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-base);
        }
        .help-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #cbd5e1;
            transform: translateY(-2px);
        }
        .help-card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }
        .help-card-icon.blue {
            background: #eff6ff;
            color: #2563eb;
        }
        .help-card-icon.cyan {
            background: #ecfeff;
            color: #0891b2;
        }
        .help-card-icon.emerald {
            background: #ecfdf5;
            color: #059669;
        }
        .help-card-icon.amber {
            background: #fffbeb;
            color: #d97706;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(160deg, #1e40af 0%, #1d4ed8 50%, #2563eb 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(6, 182, 212, 0.3) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
            pointer-events: none;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 0 0;
            border-top: 4px solid #1e3a8a;
        }
        .footer-grid {
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.25rem;
            color: #ffffff;
        }
        .footer-link {
            color: #94a3b8;
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition-fast);
            display: inline-block;
            padding: 2px 0;
        }
        .footer-link:hover {
            color: #ffffff;
        }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .page-banner {
                padding: 48px 0;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav-links,
            .desktop-search {
                display: none !important;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .site-header .max-w-7xl {
                padding-left: 16px;
                padding-right: 16px;
            }
            .faq-item-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-item-answer-inner {
                padding: 0 18px 20px 60px;
                font-size: 0.9rem;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .nav-brand {
                font-size: 1rem;
            }
            .nav-brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.8rem;
            }
            .faq-item-question {
                padding: 14px 14px;
                font-size: 0.9rem;
                gap: 10px;
            }
            .faq-item-icon {
                width: 26px;
                height: 26px;
                font-size: 0.7rem;
            }
            .faq-item-toggle {
                width: 24px;
                height: 24px;
                font-size: 0.6rem;
            }
            .faq-item-answer-inner {
                padding: 0 14px 16px 50px;
                font-size: 0.85rem;
            }
            .page-banner h1 {
                font-size: 1.35rem;
            }
            .page-banner p {
                font-size: 0.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .help-card {
                padding: 20px 16px;
            }
        }

        /* Focus visible for accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }