/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 300;
}

.header .subtitle {
    text-align: center;
    margin-top: 0.5rem;
    opacity: 0.9;
}

/* 导航样式 */
.nav {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.nav-links {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #667eea;
}
 .dashboard {
            display: grid;
            grid-template-columns: 250px 1fr;
            gap: 2rem;
        }
        
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            height: fit-content;
        }
        
        .sidebar h3 {
            color: #333;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #667eea;
        }
        
        .sidebar ul {
            list-style: none;
        }
        
        .sidebar li {
            margin-bottom: 0.5rem;
        }
        
        .sidebar a {
            display: block;
            padding: 0.75rem 1rem;
            color: #666;
            text-decoration: none;
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        
        .sidebar a:hover,
        .sidebar a.active {
            background: #667eea;
            color: white;
        }
        
        .main-content {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        
        .stat-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
        }
        
        .stat-card:nth-child(2) {
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        }
        
        .stat-card:nth-child(3) {
            background: linear-gradient(135deg, #ffc107 0%, #ff6b6b 100%);
        }
        
        .stat-card:nth-child(4) {
            background: linear-gradient(135deg, #17a2b8 0%, #6f42c1 100%);
        }
        
        .stat-card:nth-child(5) {
            background: linear-gradient(135deg, #dc3545 0%, #e83e8c 100%);
        }
        
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        
        .stat-label {
            font-size: 0.9rem;
            opacity: 0.9;
        }
        
        .recent-orders {
            margin-top: 2rem;
        }
        
        .table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
        }
        
        .table th,
        .table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid #e9ecef;
        }
        
        .table th {
            background: #f8f9fa;
            font-weight: 600;
        }
        
        .status-badge {
            padding: 0.25rem 0.75rem;
            border-radius: 12px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .status-pending {
            background: #fff3cd;
            color: #856404;
        }
        
        .status-confirmed {
            background: #d4edda;
            color: #155724;
        }
        
        .status-shipped {
            background: #d1ecf1;
            color: #0c5460;
        }
        
        .status-cancelled {
            background: #f8d7da;
            color: #721c24;
        }
        
        .header-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
        }
        
        .welcome {
            font-size: 1.5rem;
            color: #333;
        }
        
        .logout-btn {
            background: #dc3545;
            color: white;
            padding: 0.5rem 1rem;
            border: none;
            border-radius: 6px;
            text-decoration: none;
            font-size: 0.9rem;
        }
        
        .logout-btn:hover {
            background: #c82333;
        }
/* 搜索区域 */
.search-section {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.search-form {
    display: grid;
    grid-template-columns: 1fr 200px 150px 150px auto;
    gap: 1rem;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #555;
}

.form-control {
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-warning {
    background: #ffc107;
    color: #212529;
}

/* 产品展示区域 */
.products-section {
    margin-bottom: 2rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #f8f9fa;
}

.product-info {
    padding: 1.5rem;
}

.product-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #333;
}

.product-code {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.product-details {
    margin: 1rem 0;
}

.product-details p {
    margin: 0.25rem 0;
    font-size: 0.95rem;
}

.price-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1rem 0;
    padding: 1rem 0;
    border-top: 1px solid #e9ecef;
}

.price-retail {
    font-size: 1.25rem;
    font-weight: 700;
    color: #dc3545;
}

.price-wholesale {
    font-size: 1rem;
    color: #28a745;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination a {
    padding: 0.5rem 1rem;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    text-decoration: none;
    color: #495057;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination a.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* 订单表单 */
.order-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 2rem;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6c757d;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .search-form {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .price-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 通知提示 */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}