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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runcodex.com)</title>
<style>
div
{
border:2px solid #a1a1a1;
padding:10px 40px;
background:#dddddd;
width:300px;
border-radius:25px;
}
</style>
</head>
<body>
<div>border-radius 属性允许您为元素添加圆角边框! </div>
</body>
</html>
输入 JavaScript 代码……
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<title>bduanqiaodaima</title>
div{
border:2px solid gray;
background:blue;
<div>
border-radius属性允许您为元素添加圆角边框!
</div>