@charset "utf-8"; 

.category dl{ margin:10px;}
.category dt { height: 25px; line-height: 25px; overflow: hidden; position: relative;}
.category dd { line-height: 25px; overflow: hidden; padding: 0 0 0 20px;}
.category dd { display: none;}
.category dd a { display: block; height: 25px; line-height: 25px; overflow: hidden;}
.category .fold,.category .unfold { background: url("../images/listbar.png") no-repeat scroll 0 0 transparent;}
.category .fold { background-position: -15px -8px; cursor: pointer; float: left; height:20px; width:20px;}
.category .unfold { background-position: -15px -51px; cursor: pointer; float: left; height: 20px; width: 20px; }