#topics_sider{position:relative;padding:10px 20px 0 10px;height:185px;}
#topics_sider ul,#topics_sider li{list-style-type:none;margin:0;padding:0;}
#topics_sider .box{overflow:hidden;position:relative;width:910px;height:200px;margin:0 auto;margin-left:35px;}
#topics_sider .list{overflow:hidden;width:9999px;}
#topics_sider .list li{float:left;width:230px;height:185px;position:relative;box-shadow:#ccc 0 0 10px;}
#topics_sider .list li img{box-shadow:#ccc 0 5px 5px;width:95%;height:90%;}
#topics_sider .prev,
#topics_sider .next{position:absolute;top:50%;margin-top:-25px;width:40px;height:50px;background-image:url(../image/control.png);background-repeat:no-repeat;font:0/0 Arial;cursor:pointer;}
#topics_sider .prev{left:5px;background-position:0 0;}
#topics_sider .next{right:5px;background-position:-40px 0;}
#topics_sider .prev:hover{background-position:0 -50px;}
#topics_sider .next:hover{background-position:-40px -50px;}