XHTML+CSS 打造的 3D 圆角边框

<html>
 <head>
 <title>3D圆角</title>
 <style type=text/css>
 .raised{background:transparent;width:40%;}
 .raised h1,.raised p{margin:0 10px;}
 .raised h1{font-size:2em;color:#fff;}
 .raised p{padding-bottom:0.5em;}
 .raised .b1,.raised .b2,.raised .b3,.raised .b4,.raised .b1b,.raised .b2b,.raised .b3b,.raised .b4b{display:block;overflow:hidden;font-size:1px;}
 .raised .b1,.raised .b2,.raised .b3,.raised .b1b,.raised .b2b,.raised .b3b{height:1px;}
 .raised .b2{background:#ccc;border-left:1px solid #fff;border-right:1px solid #eee;}
 .raised .b3{background:#ccc;border-left:1px solid #fff;border-right:1px solid #ddd;}
 .raised .b4{background:#ccc;border-left:1px solid #fff;border-right:1px solid #aaa;}
 .raised .b4b{background:#ccc;border-left:1px solid #eee;border-right:1px solid #999;}
 .raised .b3b{background:#ccc;border-left:1px solid #ddd;border-right:1px solid #999;}
 .raised .b2b{background:#ccc;border-left:1px solid #aaa;border-right:1px solid #999;}
 .raised .b1{margin:0 5px;background:#fff;}
 .raised .b2, .raised .b2b{margin:0 3px;border-width:0 2px;}
 .raised .b3, .raised .b3b{margin:0 2px;}
 .raised .b4, .raised .b4b{height:2px; margin:0 1px;}
 .raised .b1b{margin:0 5px; background:#999;}
 .raised .boxcontent{display:block;background:#ccc;border-left:1px solid #fff;border-right:1px solid #999;}
 </STYLE>
 </head>
 <body>
 <div class="raised">
 <b class="b1"></b><b class="b2"></b><b class="b3"></b><b class="b4"></b>
 <div class="boxcontent">
 <h1>3D圆角</h1>
 </div>
 <b class="b4b"></b><b class="b3b"></b><b class="b2b"></b><b class="b1b"></b>
 </div>
 </body>
 </html>

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