:root {
            --primary-color: #4f46e5;
            --primary-hover: #4338ca;
            --secondary-color: #f97316;
            --success-color: #10b981;
            --info-color: #3b82f6;
            --warning-color: #f59e0b;
            --danger-color: #ef4444;
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --bg-muted: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #334155;
            --border-color: #e2e8f0;
            --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
            --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
        }

        /* 暗色模式变量 */
        @media (prefers-color-scheme: dark) {
            :root {
                --bg-page: #0b1220;
                --bg-card: #0f172a;
                --bg-muted: #111827;
                --text-primary: #e5e7eb;
                --text-secondary: #cbd5e1;
                --border-color: #1f2937;
                --shadow-sm: 0 8px 16px -6px rgba(0, 0, 0, 0.45), 0 3px 6px -4px rgba(0, 0, 0, 0.4);
                --shadow-md: 0 16px 28px -8px rgba(0, 0, 0, 0.55), 0 8px 12px -6px rgba(0, 0, 0, 0.45);
            }
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-page);
            color: var(--text-primary);
        }
        
        .card {
            background: var(--bg-card);
            border-radius: 14px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            border: 1px solid var(--border-color);
            backdrop-filter: saturate(140%) blur(4px);
        }
        
        .card:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        
        .progress-bar {
            height: 8px;
            border-radius: 4px;
            background-color: var(--bg-muted);
            overflow: hidden;
        }
        
        .progress-fill {
            height: 100%;
            transition: width 0.6s ease;
        }
        
        .status-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.2));
        }
        
        .nav-link {
            position: relative;
            padding: 8px 12px;
            transition: all 0.2s ease;
            color: var(--text-secondary);
        }
        
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: white;
            transition: all 0.2s ease;
            transform: translateX(-50%);
        }
        
        .nav-link:hover:after {
            width: 100%;
        }
        
        .nav-link.active:after {
            width: 100%;
        }
        
        /* 表格样式 */
        .data-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
        }
        
        .data-table th {
            background-color: var(--bg-page);
            color: #64748b;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 12px;
            letter-spacing: 0.05em;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .data-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
            vertical-align: middle;
        }
        
        .data-table tr:last-child td {
            border-bottom: none;
        }
        
        .data-table tr:hover td {
            background-color: var(--bg-page);
        }
        
        /* 响应式表格 */
        @media (max-width: 1024px) {
            .data-table-container {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            
            .data-table {
                min-width: 900px;
            }
        }
        
        /* 移动端菜单 */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        
        .mobile-menu.open {
            max-height: 500px;
        }

        /* 抽屉/遮罩（移动端） */
        @media (max-width: 768px) {
            header .mobile-menu {
                border-radius: 12px;
            }
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate-fade-in {
            animation: fadeIn 0.5s ease-out forwards;
        }
        
        /* 加载动画 */
        .loader {
            border: 3px solid #f3f3f3;
            border-radius: 50%;
            border-top: 3px solid #4f46e5;
            width: 20px;
            height: 20px;
            animation: spin 1s linear infinite;
            display: inline-block;
            vertical-align: middle;
            margin-right: 8px;
        }

        /* 细节微交互：按钮按压与焦点环 */
        button {
            outline: none;
        }
        button:active {
            transform: translateY(0.5px);
        }
        button:focus-visible {
            box-shadow: 0 0 0 3px rgba(79,70,229,0.35);
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }