.case_box{position:relative;width:100%;overflow:hidden;z-index: 1;}
.case_box ul{position:absolute;top:0px;left:0px;}
.case_box ul li{float:left;list-style: none;}

.case_box ol{position:absolute;bottom:0px;right:6px;margin:0 0 0 0px;height:12px;z-index:4;}
.case_box ol li{float:left;margin:0 4px;display:inline;width:6px;height:6px;line-height:999em;overflow:hidden;cursor:pointer;background-color: #fff;border-radius: 3px;}
.case_box ol li.active{background: #efa356;}