本文实例讲述了纯CSS实现圆角折叠菜单的方法。分享给大家供大家参考。具体实现方法如下：
复制代码
代码如下:
CSS圆角折叠菜单
#menu {
font-size:12px;
height:380px;
margin:0;
padding:0;
width:180px;
overflow:hidden;
background:#f0f0f0;
list-style:none;
border-left:1px solid #DDD;
border-right:1px solid #DDD;
}
#menu li a {
display:block;
text-decoration:none;
color:#00b;
margin:0;
width:100%;
}
#menu li a span {
display:none;
color:#000;
height:120px
}
#menu li a.one span {
display:block;
margin:0 10px;
}
#menu li a:hover {
background:#f1f1f1;
}
#menu li a:hover span {
display:block;
margin:0 10px;
cursor:pointer;
}
#menu .h2 {
margin:0 5px;
padding:0;
color:#808;
font-variant:small-caps;
border:0;
}
#menu .h3 {
margin:0 5px;
padding:0;
color:#00b;
}
.curved {
width:180px;
margin:0 auto;
}
.curved .b1, .curved .b2, .curved .b3, .curved .b4 {
font-size:1px;
display:block;
background:#88c;
overflow: hidden;
}
.curved .b1, .curved .b2, .curved .b3 {
height:1px;
}
.curved .b2, .curved .b3, .curved .b4 {
background:#f0f0f0;
border-left:1px solid #DDD;
border-right:1px solid #DDD;
}
.curved .b1 {
margin:0 4px;
background:#DDD;
}
.curved .b2 {
margin:0 2px;
border-width:0 2px;
}
.curved .b3 {
margin:0 1px;
}
.curved .b4 {
height:2px;
margin:0px;
}