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          ??一站式輕松地調用各大LLM模型接口，支持GPT4、智譜、豆包、星火、月之暗面及文生圖、文生視頻
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                            ```
<style>
      
        .parent{
            width:400px;
            height: 300px;
            background: khaki;
        }
        .child{
            margin-top:100px;
            width: 100px;
            height: 100px;
            background: lawngreen;
        }
        /* :before某個元素里面的最前面 */
        .parent::before{
            content: "";
            display: table;
        }
    </style>
```
> 子元素作為父元素的第一個元素，給它margin-top沒用，它的父元素變動 偽元素是在某個元素里面的最前面或者最后面

```
<body>
    <div class="parent">
        <div class="child"></div>
    </div>
</body>
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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