h1,h2,h3,h4,p,body,html{padding:0;margin:0;}
    .tc { text-align:center;}
    .fc {
  display: flex;
  justify-content: center; /* 水平居中子元素 */
}
        body {
            font-family: 'Arial', sans-serif;
            max-width: 1000px;
            margin: 0 auto;
            line-height: 1.6;
            color: #333;
            background:#f6f6f6;
        }
        
        .lang {
            text-align:center;
            padding:10px;
            margin-bottom:30px;
        }
        .lang a {color:#999; text-decoration:none; display:inline-block; margin:0 5px;}
        .lang a.active {color:#3c6;}
        
        .ban {
            text-align: center;
            margin-bottom:30px;
        }
        .ban p { margin-bottom:0;}
        .ban h1 { color:#3c6;}
        h1 {
            color: #2c3e50;
            text-align: center;
        }
        .container {
            background-color: #fff;
            border-radius: 8px;
            padding: 20px;
        }
        .upload-area {
            border: 2px dashed #ccc;
            border-radius: 5px;
            padding: 30px;
            text-align: center;
            margin-bottom: 20px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .upload-area:hover {
            border-color: #3498db;
            background-color: #f0f8ff;
        }
        #fileInput {
            display: none;
        }
        .preview {
            margin-top: 20px;
            text-align: center;
        }
        #previewImage {
            max-width: 200px;
            max-height: 200px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        textarea {
            width: 100%;
            height: 150px;
            margin-top: 20px;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            resize: vertical;
            font-family: monospace;
        }
        button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            margin-top: 10px;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #2980b9;
        }
        .instructions {
            margin-top: 30px;
            padding: 15px;
            background-color: #e8f4fc;
            border-radius: 4px;
            font-size: 14px;
        }
        
        .conflex {
  display: flex;
  justify-content: space-between; /* 用于在子元素之间创建间距 */
}

.conflex .conl {
  width: 46%; /* 每个子元素的宽度 */
  margin-right:30px;
}

.conl h3 {margin-bottom:20px;}