CSS margin(外)间距案例 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            /*取消浏览器外间距*/
            margin: 0;
        }
         .c1{
            width:60%;
            height: 200px;
            border: 1px solid green;
            /*auto水平居中*/
            margin: 100px auto;
        }
         .c2{
            width: 80%;
            height: 45px;
            border: 1px solid red;
            margin: 0 auto;
        }
    </style>
</head>
<body>

<div class="c1">
    <div class="c2"></div>
</div>

</body>
</html>

 

posted @ 2022-05-29 16:57  呼长喜  阅读(27)  评论(0)  编辑  收藏  举报