* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        .container {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            width: 100%;
            max-width: 350px;
            padding: 30px;
            text-align: center;
        }
        
        .title {
            color: #333;
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 24px;
        }
        
        .input-group {
            margin-bottom: 20px;
        }
        
        .phone-input {
            width: 100%;
            padding: 16px 20px;
            font-size: 16px;
            border: 2px solid #e1e5e9;
            border-radius: 12px;
            outline: none;
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .phone-input:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }
        
        .description {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 24px;
            text-align: left;
        }
        
        .submit-btn {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        
        .submit-btn:active {
            transform: translateY(2px);
        }
        
        .footer {
            text-align: center;
            padding: 20px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 12px;
        }
        
        .company-info {
            margin-bottom: 8px;
        }
        
        .beian-info {
            margin-top: 8px;
        }
        
        @media (max-width: 480px) {
            .card {
                padding: 20px;
            }
            
            .title {
                font-size: 20px;
            }
        }