:root {
            --primary-color: #ff6b6b;
            --secondary-color: #4ecdc4;
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        
        
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .navbar-logo {
      width: 80px;
      border-radius: 30%;
        }
        .dropdown-item:hover {
    background-color: #f1d6ed; /* 银灰色背景 */
    color: #000; /* 文字颜色，可根据需要调整 */
}