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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>纯CSS实现圆角效果</title>
<style type="text/css">
.yg{background:#9bd1fa;}
.rtop,.rbottom {display:block;background:#fff;}
.rtop b,.rbottom b{display:block;height:1px;overflow:hidden;background:#9bd1fa;}
.r1 {margin:0 4px;}
.r2{margin:0 3px;}
.r3{margin:0 2px;}
.rtop .r4,.rbottom .r4{margin:0 1px;height:2px;}
</style>
</head>
<body>
<div class="yg">
<b class="rtop"><b class="r1"></b><b class="r2"></b><b class="r3"></b><b class="r4"></b></b>
1<br />
没有图片纯CSS实现圆角<br />
<b class="rbottom"><b class="r4"></b><b class="r3"></b><b class="r2"></b><b class="r1"></b></b>
</div>
</body>
</html>
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原文地址：http://www.cnblogs.com/hjlost/p/4290595.html
