圆角边框及圆角背景
文章来源：http://www.cnblogs.com/mslove/archive/2009/03/24/1420703.html
1、圆角边框
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<style type="text/css">.serif { background: transparent; width:40%; }.serif h1, .serif p { margin:0 10px; }.serif h1 { font-size:2em; color:#fff; }.serif p { padding-bottom:0.5em; }.serif .b1, .serif .b2, .serif .b3, .serif .b4 { display:block; overflow:hidden; font-size:1px; }.serif .b1, .serif .b2, .serif .b3 { height:1px; }.serif .b2, .serif .b3 { background:#fc0; border-left:1px solid #fff; border-right:1px solid #fff; }.serif .b4 { background:#fc0; border-left:1px solid #fff; border-right:1px solid #fff; }.serif .b1 { margin:0; background:#fff; }.serif .b2 { margin:0 1px; border-width:0 2px; }.serif .b3 { margin:0 3px; }.serif .b4 { height:2px; margin:0 4px; }.serif .boxcontent { display:block; background:#fc0; border-left:1px solid #fff; border-right:1px solid #fff; margin:0 5px; }</style><div />
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<style type="text/css">.pillar { background:transparent; width:40%; }.pillar h1, .pillar p { margin:0 10px; }.pillar h1 { font-size:2em; color:#fff; }.pillar p { padding-bottom:0.5em; }.pillar .b1, .pillar .b2, .pillar .b3, .pillar .b4 { display:block; overflow:hidden; font-size:1px; }.pillar .b1, .pillar .b2, .pillar .b4 { height:1px; }.pillar .b2, .pillar .b3 { background:#d66; border-left:1px solid #fff; border-right:1px solid #fff; }.pillar .b4 { background:#d66; border-left:4px solid #fff; border-right:4px solid #fff; }.pillar .b1 { margin:0 2px; background:#fff; }.pillar .b2 { margin:0 1px; border-width:0 1px; }.pillar .b3 { height:2px; margin:0; }.pillar .b4 { margin:0 2px; }.pillar .boxcontent { display:block; background:#d66; border-left:1px solid #fff; border-right:1px solid #fff; margin:0 5px; }</style><div class="pillar"><b class="b1"></b><b class="b2"></b><b class="b3"></b><b class="b2"></b><b class="b4"></b><div class="boxcontent"><h1>特殊css圆角矩形</h1></div><b class="b4"></b><b class="b2"></b><b class="b3"></b><b class="b2"></b><b class="b1"></b></div>