1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | <!DOCTYPE html>
<html>
<head>
<title>边框</title>
<style type="text/css">
.box{
width: 300px;
height: 300px;
border:1px solid #ccc;
border-radius:50%;
background:pink;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
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