方法1:
简洁型css圆角矩形
code1:
    < 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;" > 简洁型css圆角矩形  font >    
  div >    
 < b  class ="b4b d1" > b >< b  class ="b3b d1" > b >< b  class ="b2b d1" > b >< b  class ="b1b" > b >    
  div >   
方法2:
    
 无图片实现圆角框    
    
   
code2:
    < style  type ="text/css" >    
 div.RoundedCorner{}{background:#9BD1FA; width:400px;}    
 b.rtop, b.rbottom{}{display:block;background: #FFF}    
 b.rtop b, b.rbottom b{}{display:block;height: 1px;overflow: hidden; background: #9BD1FA}    
 b.r1{}{margin: 0 5px}    
 b.r2{}{margin: 0 3px}    
 b.r3{}{margin: 0 2px}    
 b.rtop b.r4, b.rbottom b.r4{}{margin: 0 1px;height: 2px}    
  style >    
 < div  class ="RoundedCorner" >    
 < b  class ="rtop" >< b  class ="r1" > b >< b  class ="r2" > b >< b  class ="r3" > b >< b  class ="r4" > b > b >    
 < br > 无图片实现圆角框 < br >< br >    
 < b  class ="rbottom" >< b  class ="r4" > b >< b  class ="r3" > b >< b  class ="r2" > b >< b  class ="r1" > b > b >    
  div >   
3D圆角矩形:
3D圆角矩形
CODE:
    < 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圆角矩形  h1 >    
  div >    
 < b  class ="b4b" > b >< b  class ="b3b" > b >< b  class ="b2b" > b >< b  class ="b1b" > b >    
  div >   
反向css圆角矩形:
反向css圆角矩形
CODE:
    < 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  class ="serif" >    
 < b  class ="b1" > b >< b  class ="b2" > b >< b  class ="b3" > b >< b  class ="b4" > b >    
 < div  class ="boxcontent" >    
 < h1 > 反向css圆角矩形  h1 >    
  div >    
 < b  class ="b4" > b >< b  class ="b3" > b >< b  class ="b2" > b >< b  class ="b1" > b >    
  div >   
略带菱形的css圆角:
略带菱形的css圆角矩形
CODE:
    < style  type ="text/css" >    
 .curved {}{    
   background:transparent;     
   width:40%;    
   }    
 .curved h1, .curved p {}{    
   margin:0 10px;    
   }    
 .curved h1 {}{    
   font-size:2em;     
   color:#fff;    
   }    
 .curved p {}{    
   padding-bottom:0.5em;    
   }    
 .curved .b1, .curved .b2, .curved .b3, .curved .b4 {}{    
   display:block;     
   overflow:hidden;     
   height:1px;    
   font-size:1px;    
   }    
 .curved .b2, .curved .b3, .curved .b4 {}{    
   background:#e0cea3;     
   border-left:1px solid #fff;     
   border-right:1px solid #fff;    
   }    
 .curved .b1 {}{    
   margin:0 4px;     
   background:#fff;    
   }    
 .curved .b2 {}{    
   margin:0 4px;     
   height:2px;    
   }    
 .curved .b3 {}{    
   margin:0 3px;    
   }    
 .curved .b4 {}{    
   margin:0;     
   height:1px;     
   border-width:0 3px 0 3px;    
   }    
 .curved .boxcontent {}{    
   display:block;     
   background:#e0cea3;     
   border:0 solid #fff;     
   border-width:0 1px;    
   }    
  style >    
    
 < div  class ="curved" >    
 < b  class ="b1" > b >< b  class ="b2" > b >< b  class ="b3" > b >< b  class ="b4" > b >    
 < div  class ="boxcontent" >    
 < h1 > 略带菱形的css圆角矩形  h1 >    
  div >    
 < b  class ="b4" > b >< b  class ="b3" > b >< b  class ="b2" > b >< b  class ="b1" > b >    
  div >   
特殊CSS圆角:
特殊css圆角矩形
CODE:
    < 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 >	
