17.边框注意事项

<head>
    <meta charset="UTF-8">
    <title>边框注意事项</title>
    <style>
        .box1{
            width: 200px;
            height: 200px;
            background-color: teal;
            border-style: solid;
            border-color: teal;
        }
        .sub-box{
            width: 100px;
            height: 100px;
            background-color: indianred;
        }
        .m1{
            margin: 20px 20px 20px 20px;
        }
    </style>
</head>
<body>
    <!--当外盒子没有边框时，内部的盒子会溢出，类似移除-->
    <div class="box1">
        <div class="sub-box m1"></div>
    </div>

</body>

posted on 2022-04-07 15:33 小小程序猿level1 阅读(26) 评论(0) 收藏举报