请老师检查代码

来源：2-11 编程练习

KangarooL

2021-03-11 23:19:52

相关代码：

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>边框</title>
    <style>
        /*补充代码*/
        .box{
            width:100px;
            height:40px;
            position:relative;
        }
        .box .bd1 {
            border:100px solid transparent;
            border-left-color:red;
            border-top-left-radius:80px;
            border-bottom-left-radius:80px;
        }

        .box .bd2 {
            border:100px solid transparent;
            border-right-color:red;
            border-top-right-radius:80px;
            border-bottom-right-radius:80px;
            position:absolute;
            top:0;
            left:-30px;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="bd1"></div>
        <div class="bd2"></div>
    </div>
</body>

</html>