<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box1, .box2, .box3{
width: 200px;
}
.box1{
width: 400px;
height: 200px;
overflow: hidden;
}
.box1::before{
float: left;
display: block;
height: 400px;
width:400px;
border-radius: 100%;
border: solid 10px purple;
box-sizing: border-box;
content: "";
}
.box1::after{
margin-top: 10px;
margin-left: 10px;
display: block;
width: 380px;
height: 380px;
border: solid #ffff00 10px;
border-radius: 100%;
box-sizing: border-box;
content: "";
}
.box2{
float: left;
margin-top: -180px;
margin-left: 20px;
width: 360px;
height: 180px;
overflow: hidden;
}
.box2::before{
float: left;
display: block;
margin: 0;
width: 360px;
height: 360px;
border-radius: 100%;
border: solid 10px blue;
box-sizing: border-box;
content: "";
}
.box2::after{
display: block;
margin-top: 10px;
margin-left: 10px;
width: 340px;
height: 340px;
border-radius: 100%;
border: solid 10px lightseagreen;
box-sizing: border-box;
content: "";
}
.box3{
margin-top: -160px;
margin-left: 40px;
width: 340px;
height: 160px;
overflow: hidden;
}
.box3::before{
float: left;
display: block;
width: 320px;
height: 320px;
border: solid 10px red;
border-radius: 100%;
box-sizing: border-box;
content: "";
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="box4"></div>
</body>
</html>
最后的显示效果为
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