~~~
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>talk</title>
<style type="text/css">
div {
position: relative;
width: 500px;
height: 300px;
border: 1px solid black;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
-ms-border-radius: 50%;
-o-border-radius: 50%;
border-radius: 50%;
font-size: 24px;
font-weight: bold;
text-align: center;
line-height: 300px;
}
div:before,
div:after {
position: absolute;
content: "";
display: block;
border: 1px solid black;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
-ms-border-radius: 50%;
-o-border-radius: 50%;
border-radius: 50%;
}
div:before {
width: 50px;
height: 50px;
bottom: -25px;
right: 25px;
}
div:after {
width: 20px;
height: 20px;
bottom: -50px;
right: 0;
}
</style>
</head>
<body>
<div>大家好，欢迎来到慕课网！</div>
</body>
</html>
~~~
