效果：
code：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>MyHtml.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style type="text/css">
.b1,.b2,.b3,.b4,.b1b,.b2b,.b3b,.b4b,.b{display:block;overflow:hidden;}
.b1,.b2,.b3,.b1b,.b2b,.b3b{height:1px;}
.b2,.b3,.b4,.b2b,.b3b,.b4b,.b{border-left:1px solid #999;border-right:1px solid #999;}
.b1,.b1b{margin:0 5px;background:#999;}
.b2,.b2b{margin:0 3px;border-width:2px;}
.b3,.b3b{margin:0 2px;}
.b4,.b4b{height:2px;margin:0 1px;}
.d1{background:#F7F8F9;}
.k {height:300px;}
</style>
</head>
<body>
<div>
<b class="b1"></b><b class="b2 d1"></b><b class="b3 d1"></b><b class="b4 d1"></b>
<div class="b d1 k">
<font style="font-size:26px;color:red; margin:0px 10px;">簡潔型css圓角矩形</font>
</div>
<b class="b4b d1"></b><b class="b3b d1"></b><b class="b2b d1"></b><b class="b1b"></b>
</div>
</body>
</html>