/* 基础样式 */
            body { font-family: Arial, sans-serif; margin: 0; padding: 0; background-color: #f5f5f5; }
            .container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
            
            /* 头部样式 */
            header { text-align: center; margin-bottom: 2rem; }
            h1 { color: #333; margin: 0; }
            .copyright { margin-bottom: 1rem; color: #666; font-size: 0.9rem; }
            .copyright a { color: #0088cc; text-decoration: none; }
            
            /* 登录区域 */
            .login-section { text-align: center; margin: 2rem 0; }
            .login-section.hidden { display: none; }
            
            /* 用户信息区域 */
            .user-info { background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
            .user-info.hidden { display: none; }
            .user-info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-bottom: 1.5rem; }
            .info-item { background: #f8f9fa; padding: 1rem; border-radius: 6px; }
            .info-item label { display: block; color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }
            
            /* Stats Card Styles */
            .stats-card {
                background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
                border-radius: 16px;
                padding: 24px;
                margin: 20px 0;
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
                transition: transform 0.3s ease, box-shadow 0.3s ease;
                animation: fadeIn 0.5s ease-out forwards;
            }

            .stats-card:hover {
                transform: translateY(-5px);
                box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            }

            .stats-card .date {
                font-size: 1.2rem;
                font-weight: 600;
                color: #2c3e50;
                margin-bottom: 20px;
                padding-bottom: 10px;
                border-bottom: 2px solid #e9ecef;
            }

            .stats-grid {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
                gap: 20px;
            }

            .stat-item {
                text-align: center;
                padding: 16px;
                background: #ffffff;
                border-radius: 12px;
                transition: background-color 0.3s ease;
            }

            .stat-item:hover {
                background: #f8f9fa;
            }

            .stat-value {
                font-size: 2rem;
                font-weight: 700;
                color: #3498db;
                margin-bottom: 8px;
            }

            .stat-label {
                font-size: 0.9rem;
                color: #6c757d;
                text-transform: uppercase;
                letter-spacing: 1px;
            }

            @keyframes fadeIn {
                from {
                    opacity: 0;
                    transform: translateY(20px);
                }
                to {
                    opacity: 1;
                    transform: translateY(0);
                }
            }

            @media (max-width: 768px) {
                .stats-grid {
                    grid-template-columns: repeat(2, 1fr);
                }
                
                .stat-value {
                    font-size: 1.5rem;
                }
                
                .stat-label {
                    font-size: 0.8rem;
                }
            }

            @media (max-width: 480px) {
                .stats-grid {
                    grid-template-columns: 1fr;
                }
                
                .stats-card {
                    padding: 16px;
                }
            }
            
            /* API Keys 区域 */
            .api-keys-section { margin-top: 2rem; }
            .api-keys-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
            .api-key-item { background: #fff; padding: 1.5rem; border-radius: 6px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); margin-bottom: 1rem; }
            .api-key-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
            .api-key-status { font-size: 0.8rem; padding: 0.25rem 0.75rem; border-radius: 12px; }
            .api-key-status.active { background: #d4edda; color: #155724; }
            .api-key-status.disabled { background: #f8f9fa; color: #6c757d; }
            .api-key-status.revoked { background: #f8d7da; color: #721c24; }
            
            /* 按钮样式 */
            button { cursor: pointer; border: none; border-radius: 4px; padding: 0.5rem 1rem; }
            .create-key-button { background: #28a745; color: #fff; }
            .logout-button { background: #dc3545; color: #fff; }
            .api-key-button { padding: 0.4rem 1rem; font-size: 0.85rem; }
            .api-key-button.disable { background: #6c757d; color: #fff; }
            .api-key-button.enable { background: #28a745; color: #fff; }
            .api-key-button.revoke { background: #dc3545; color: #fff; }
            
            /* 模态框样式 */
            .modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); align-items: center; justify-content: center; z-index: 1000; }
            .modal.visible { display: flex; }
            .modal-content { background: #fff; padding: 2rem; border-radius: 8px; width: 100%; max-width: 500px; }
            .form-group { margin-bottom: 1.5rem; }
            .form-group label { display: block; margin-bottom: 0.5rem; }
            .form-group input { width: 100%; padding: 0.5rem; border: 1px solid #ddd; border-radius: 4px; }
            .form-actions { display: flex; justify-content: flex-end; gap: 1rem; }