CSS三列等高

方式1：这种方式主要的原理是给每个框设置大的底内边距，然后 用数值相似的负值外边距消除浮动

<html>
  <head>
    <title></title>
    <style type="text/css">
    .wrapper{
        overflow: hidden;//清除浮动
        width: 100%;
        position: relative;
    }
    .box{
        width: 300px;
        float: left;
        background: #ccc;
        margin-left: 20px;
        padding: 20px 20px 520px 20px;
        margin-bottom: -500px;
    }
    .bottom{
        position: absolute;
        height: 20px;
        bottom: 0;
        width: 300px;
        margin-left: -20px;padding-bottom: 520px;
    }
    </style>
  </head>
<body>
    <div class="wrapper">
        <div class="box">
        <h2>box1</h2>
            <p>hello word!</p>
            <p>hello word!</p>
            <div class="bottom"></div>
        </div>
        <div class="box">
            <h2>box2</h2>
            <p>hello word!</p>
            <div class="bottom"></div>
        </div>
        <div class="box">
            <h2>box3</h2>
            <p>hello word!</p>
            <div class="bottom"></div>
        </div>
    </div>
</body>
</html>

 

posted @ 2017-09-16 21:53  RunningAndRunning  阅读(222)  评论(0)  编辑  收藏  举报