圆角矩形的html+css实现代码

<style type="text/css">
.spiffy{display:block}
.spiffy *{
display:block;
height:1px;
font-size:.01em;
overflow:hidden;
background:#b20000}
.spiffy1{
margin-left:3px;
margin-right:3px;
padding-left:1px;
padding-right:1px;
border-left:1px solid #870000;
border-right:1px solid #870000;
background:#9f0000}
.spiffy2{
margin-left:1px;
margin-right:1px;
padding-right:1px;
padding-left:1px;
border-left:1px solid #6f0000;
border-right:1px solid #6f0000;
background:#a30000}
.spiffy3{
margin-left:1px;
margin-right:1px;
border-left:1px solid #a30000;
border-right:1px solid #a30000;}
.spiffy4{
border-left:1px solid #870000;
border-right:1px solid #870000}
.spiffy5{
border-left:1px solid #9f0000;
border-right:1px solid #9f0000}
.spiffyfg{
background:#b20000}
</style>

html代码=====================================