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                            #### 1.html結構
    <div class="parent">
            <div></div>
            <div></div>
            <div></div>
            <div></div>
        </div>
* * * * *
    用偽類畫邊線
    .parent{
            width: 1000px;
            height: 400px;
            border-radius: 3px;
            border:1px solid #333;
            margin-left: auto;
            margin-right: auto;
        }
        .parent>div{
            width: 25%;
            height: 100%;
            float: left;
            position: relative;
        }
        .parent>div:not(:last-child)::after{
            content: "";
            display: block;
            position: absolute;
            height: 100%;
            border-right:1px solid #333;
            top: 0;
            right: 0;
        }
        
* * * * *
用margin-left：-1px；
~~~
.parent{
    width: 1000px;
    height: 400px;
    border-radius: 3px;
    border:1px solid #333;
    margin-left: auto;
    margin-right: auto;
}
.parent>div{
    width: 25%;
    height: 100%;
    float: left;
    border-left: 1px solid #333;
    margin-left: -1px;
}
~~~

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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