老师这个蝴蝶结的代码是否需要改进

来源：2-11 编程练习

ZcKing

2020-12-17 16:48:46

# 具体遇到的问题

# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

<!DOCTYPE html>
<html>

<head>
<meta charset="UTF-8">
<title>边框</title>
<style>
/*补充代码*/
.box {
width: 500px;
height: 500px;
position: relative;
}

.box .bd1 {
width: 0;
height: 0;
border: 100px solid transparent;
border-left-color: red;
border-top-left-radius: 80px;
border-bottom-left-radius: 80px;

}

.box .bd2 {
position: absolute;
width: 0;
height: 0;
border: 100px solid transparent;
border-right-color: red;
border-top-right-radius: 80px;
border-bottom-right-radius: 80px;
top: 0;
left: -20px;
}
</style>
</head>

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

</html>