.versions{width:320px;height:150px;float:left}.versions img{max-width:100%;float:left}.versions span{display:block;float:left;width:100%}.btn_online{position:absolute;right:0;bottom:8px;color:#2d8cf0}.btn_online span{width:72px;display:block;padding:2px 0;text-align:center;border-radius:5px;border:1px solid #e8eaec}.btn_online:after{clear:both;content:""}