:root {
            --primary-color: #2E7D32;
            --secondary-color: #4CAF50;
            --accent-color: #81C784;
        }
        
        /* 基础样式 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        html {
            scroll-behavior: smooth;
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
        }
        
        body {
            background: linear-gradient(135deg, #f8fdf8 0%, #f0f9f0 100%);
            min-height: 100vh;
            color: #1f2937;
            overflow-x: hidden;
        }
        
        /* 布局工具类 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        
        @media (min-width: 475px) {
            .container {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
        }
        
        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        
        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        
        /* 卡片设计系统 */
        .card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .card:hover {
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
            transform: translateY(-4px);
        }
        
        /* 统计卡片变体 */
        .stat-card {
            position: relative;
            overflow: hidden;
        }
        
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        }
        
        /* 按钮设计系统 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 1rem;
            border-radius: 10px;
            font-weight: 500;
            font-size: 0.875rem;
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .btn-primary:hover {
            box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
            transform: translateY(-1px);
        }
        
        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary-color);
            color: var(--primary-color);
        }
        
        .btn-outline:hover {
            background: var(--primary-color);
            color: white;
        }
        
        .btn-ghost {
            background: transparent;
            color: var(--primary-color);
        }
        
        .btn-ghost:hover {
            background: rgba(46, 125, 50, 0.1);
        }
        
        .btn-sm {
            padding: 0.375rem 0.75rem;
            font-size: 0.75rem;
        }
        
        .btn-xs {
            padding: 0.25rem 0.5rem;
            font-size: 0.7rem;
        }
        
        /* 加载状态 */
        .loader {
            width: 40px;
            height: 40px;
            border: 4px solid #f3f3f3;
            border-top: 4px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        .loader-dots {
            display: inline-flex;
            gap: 4px;
        }
        
        .loader-dots div {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary-color);
            animation: bounce 1.4s infinite ease-in-out both;
        }
        
        .loader-dots div:nth-child(1) { animation-delay: -0.32s; }
        .loader-dots div:nth-child(2) { animation-delay: -0.16s; }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        @keyframes bounce {
            0%, 80%, 100% { transform: scale(0); }
            40% { transform: scale(1); }
        }
        
        /* 渐变文字效果 */
        .gradient-text {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        /* 移动端价格卡片样式 - 优化为两行布局 */
        .price-card {
            background: white;
            border-radius: 12px;
            padding: 16px;
            margin-bottom: 12px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            border: 1px solid #e5e7eb;
            transition: all 0.2s ease;
        }
        
        .price-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.12);
        }
        
        .price-card-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 10px;
        }
        
        .price-card-name {
            font-weight: 600;
            font-size: 16px;
            color: #1f2937;
            line-height: 1.2;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .price-card-category {
            background: #dcfce7;
            color: #166534;
            padding: 2px 6px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 500;
        }
        
        .price-card-price {
            font-size: 18px;
            font-weight: 700;
            color: #1f2937;
            text-align: right;
        }
        
        .price-card-body {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .price-card-trend {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .trend-up {
            color: #dc2626;
        }
        
        .trend-down {
            color: #16a34a;
        }
        
        .trend-same {
            color: #6b7280;
        }
        
        .trend-indicator {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            border-radius: 50%;
        }
        
        .trend-up-indicator {
            background-color: #fef2f2;
            color: #dc2626;
        }
        
        .trend-down-indicator {
            background-color: #f0fdf4;
            color: #16a34a;
        }
        
        .trend-same-indicator {
            background-color: #f9fafb;
            color: #6b7280;
        }
        
        .trend-value {
            font-size: 13px;
            font-weight: 600;
        }
        
        .price-card-time {
            font-size: 11px;
            color: #6b7280;
        }
        
        /* 搜索框增强 */
        .search-container {
            position: relative;
        }
        
        .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #9ca3af;
        }
        
        .search-input {
            padding-left: 40px;
            transition: all 0.2s ease;
        }
        
        .search-input:focus {
            box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
        }
        
        /* 无障碍优化 */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        
        /* 焦点样式 */
        .focus-outline:focus {
            outline: 2px solid var(--primary-color);
            outline-offset: 2px;
        }
        
        /* 微交互增强 */
        .ripple {
            position: relative;
            overflow: hidden;
        }
        
        .ripple::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.3);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }
        
        .ripple:active::after {
            width: 300px;
            height: 300px;
        }
        
        /* 增强视觉层次 */
        .glass-effect {
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .text-shadow {
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
        }
        
        /* 移动端优化 */
        @media (max-width: 768px) {
            .mobile-collapse {
                display: none;
            }
            
            .tablet-grid-2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        /* 小屏手机优化 */
        @media (max-width: 475px) {
            .xs-text-sm {
                font-size: 0.875rem;
            }
            
            .xs-p-3 {
                padding: 0.75rem;
            }
            
            .xs-flex-col {
                flex-direction: column;
            }
            
            .xs-space-y-2 > * + * {
                margin-top: 0.5rem;
            }
        }
        
        /* 打印样式 */
        @media print {
            .no-print {
                display: none !important;
            }
            
            .card {
                box-shadow: none;
                border: 1px solid #e5e7eb;
            }
        }