* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
            background: url('/files/pub/img/sjlycslhh/language-bg.gif') no-repeat center center fixed;
            background-size: cover;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        /* 背景遮罩 */
        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.3);
            z-index: 1;
        }
        
        /* 中间卡片 */
        .container {
            position: relative;
            z-index: 2;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 12px; 
            padding: 60px 80px;
            text-align: center;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
        }
        
        /* Logo */
        .logo {
            margin-bottom: 30px;
        }
        
        .logo img {
            width: 200px;
            height: auto;
        }
        
        .logo-text {
            font-size: 14px;
            color: #333;
            margin-top: 10px;
        }
        
        /* 标语 */
        .slogan {
            margin-bottom: 40px;
        }
        
        .slogan-cn {
            font-size: 28px;
            color: #006633;
            font-weight: 500;
            margin-bottom: 10px;
        }
        
        .slogan-en {
            font-size: 18px;
            color: #666;
        }
        
        /* 按钮组 */
        .buttons {
            display: flex;
            gap: 30px;
            justify-content: center;
        }
        
        .btn {
            padding: 15px 50px;
            font-size: 18px;
            font-weight: 500;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 150px;
        }
        
        .btn-english {
            background-color: #4CAF50;
            color: white;
        }
        
        .btn-english:hover {
            background-color: #45a049;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
        }
        
        .btn-chinese {
            background-color: #2196F3;
            color: white;
        }
        
        .btn-chinese:hover {
            background-color: #1976D2;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(33, 150, 243, 0.4);
        }
        
        /* 底部版权 */
        .copyright {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            color: rgba(255, 255, 255, 0.8); 
            z-index: 2;
            text-align: center;
            padding: 10px 0;
            font-family: '思源黑体 CN Medium', '思源黑体 CN Regular', '思源黑体 CN', sans-serif;
            font-weight: 500;
            font-style: normal;
            font-size: 14px; 
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .container {
                padding: 40px 30px;
                margin: 0 20px;
            }
            
            .logo img {
                width: 150px;
            }
            
            .slogan-cn {
                font-size: 22px;
            }
            
            .slogan-en {
                font-size: 14px;
            }
            
            .buttons {
                flex-direction: column;
                gap: 15px;
            }
            
            .btn {
                padding: 12px 30px;
                font-size: 16px;
            }
        }