* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 15px;
            background: #f5f5f5;
            position: relative;
            overflow-x: hidden;
        }
        
        #container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
        }
        
        #output {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        
        .login-container {
            width: 100%;
            max-width: 450px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            z-index: 10;
        }
        
        .login-header {
            background: #ff6600;
            color: white;
            text-align: center;
            padding: 20px;
        }
        
        .login-header h1 {
            font-size: 16px;
            font-weight: 600;
        }
        
        .login-body {
            padding: 25px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #333;
        }
        
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: #ff6600;
            box-shadow: 0 0 0 2px rgba(255, 102, 0, 0.2);
            outline: none;
        }
        
        .btn-login {
            width: 100%;
            padding: 12px;
            background: #ff6600;
            border: none;
            border-radius: 5px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .btn-login:hover {
            background: #e55c00;
        }
        
        .btn-login:active {
            background: #cc5200;
        }
        
        .weixin-login {
            text-align: center; /* 居中显示 */
            margin: 15px 0;
        }
        
        .weixin-login a {
            color: #09bb07;
            text-decoration: none;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            padding: 8px 15px;
            border: 1px solid #09bb07;
            border-radius: 20px;
            transition: all 0.3s;
        }
        
        .weixin-login a:hover {
            background-color: #09bb07;
            color: white;
        }
        
        .ico {
            font-family: Arial, sans-serif;
            margin-right: 5px;
            font-size: 16px;
        }
        
        .footer-links {
            display: flex;
            justify-content: space-between;
            margin-top: 15px;
            font-size: 14px;
        }
        
        .footer-links a {
            color: #666;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #ff6600;
            text-decoration: underline;
        }
        
        /* 响应式设计 */
        @media (max-width: 576px) {
            .login-container {
                max-width: 100%;
            }
            
            .login-body {
                padding: 20px 15px;
            }
            
            .login-header h1 {
                font-size: 16px;
            }
            
            .form-control {
                padding: 10px 12px;
                font-size: 15px;
            }
            
            .btn-login {
                padding: 10px;
                font-size: 15px;
            }
            
            .footer-links {
                flex-direction: row; /* 保持水平排列 */
                justify-content: space-between; /* 忘记密码居左，注册新账号居右 */
            }
        }
        
        /* 加载动画 */
        .loader {
            display: none;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top: 3px solid white;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* 错误消息样式 */
        .error-message {
            color: #e74c3c;
            font-size: 14px;
            margin-top: 5px;
            display: none;
        }
        
        /* 背景动画效果 */
        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .animated-bg {
            background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
            background-size: 400% 400%;
            animation: gradientBG 15s ease infinite;
        }