* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        
        .container {
            width: 100%;
            max-width: 500px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            padding: 30px;
            position: relative;
        }
        
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }
        
        .header h1 {
            color: #2c3e50;
            font-size: 24px;
        }
        
        .header p {
            color: #7f8c8d;
            font-size: 14px;
        }
        
        .user-info {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: #3498db;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .login-btn {
            padding: 8px 16px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        
        .login-btn:hover {
            background-color: #2980b9;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
            font-size: 14px;
        }
        
        select, input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
            transition: all 0.3s;
            background-color: #fff;
        }
        
        select:focus, input:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        
        .info-box {
            background-color: #f8f9fa;
            border-radius: 6px;
            padding: 15px;
            margin-top: 10px;
            border-left: 4px solid #3498db;
        }
        
        .info-box p {
            font-size: 13px;
            color: #555;
        }
        
        .btn {
            display: block;
            width: 100%;
            padding: 14px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
            margin-top: 10px;
        }
        
        .btn:hover {
            background-color: #2980b9;
        }
        
        .btn:active {
            transform: translateY(1px);
        }
        
        .btn:disabled {
            background-color: #bdc3c7;
            cursor: not-allowed;
        }
        
        .btn-query {
            background-color: #2ecc71;
        }
        
        .btn-query:hover {
            background-color: #27ae60;
        }
        
        .footer {
            text-align: center;
            margin-top: 20px;
            color: #7f8c8d;
            font-size: 12px;
        }
        
        /* 登录弹窗样式 */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        
        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        .modal {
            background: white;
            border-radius: 12px;
            width: 90%;
            max-width: 400px;
            padding: 30px;
            position: relative;
            transform: translateY(20px);
            transition: transform 0.3s;
        }
        
        .modal-overlay.active .modal {
            transform: translateY(0);
        }
        
        .modal-close {
            position: absolute;
            top: 15px;
            right: 15px;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #7f8c8d;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }
        
        .modal-close:hover {
            background-color: #f5f5f5;
        }
        
        .modal-title {
            text-align: center;
            margin-bottom: 20px;
            color: #2c3e50;
        }
        
        .qrcode-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 20px 0;
        }
        
        .qrcode {
            width: 200px;
            height: 200px;
            background-color: #f5f5f5;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            border: 1px solid #eee;
        }
        
        .qrcode img {
            max-width: 100%;
            max-height: 100%;
        }
        
        .qrcode-status {
            text-align: center;
            margin-top: 10px;
            font-size: 14px;
            color: #7f8c8d;
        }
        
        .refresh-btn {
            margin-top: 10px;
            background: none;
            border: none;
            color: #3498db;
            cursor: pointer;
            font-size: 14px;
            text-decoration: underline;
        }
        
        .refresh-btn:hover {
            color: #2980b9;
        }
        
        .login-instructions {
            background-color: #f8f9fa;
            border-radius: 6px;
            padding: 15px;
            margin-top: 20px;
            font-size: 14px;
        }
        
        /* 全局消息提示 */
        .message-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 2000;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        
        .message {
            padding: 12px 20px;
            border-radius: 6px;
            color: white;
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
            transform: translateX(100%);
            opacity: 0;
            transition: all 0.3s;
            max-width: 300px;
        }
        
        .message.show {
            transform: translateX(0);
            opacity: 1;
        }
        
        .message.success {
            background-color: #2ecc71;
        }
        
        .message.error {
            background-color: #e74c3c;
        }
        
        .message.info {
            background-color: #3498db;
        }
        
        .message.warning {
            background-color: #f39c12;
        }
        
        /* 加载动画 */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(255, 255, 255, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1500;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        
        .loading-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #3498db;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* 响应式调整 */
        @media (max-width: 480px) {
            .container {
                padding: 20px;
            }
            
            .header h1 {
                font-size: 20px;
            }
            
            .modal {
                padding: 20px;
            }
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .container {
            animation: fadeIn 0.5s ease-out;
        }
        
        /* 代码展示样式 */
        .code-block {
            background-color: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 6px;
            padding: 15px;
            margin: 10px 0;
            font-family: 'Courier New', Courier, monospace;
            font-size: 14px;
            white-space: pre-wrap;
            line-height: 1.5;
            overflow-x: auto;
        }
        
        .code-tag {
            color: #e83e8c;
            font-weight: bold;
        }