#wachat a{position:fixed;z-index:9999;right:25px;float:right;bottom:10px;margin-top:-25px;cursor:pointer;min-width:50px;max-width:150px;color:#fff;text-align:center;padding:10px;margin:0 auto 0 auto;background:0 0;width:70px;height:70px;border-radius:100%;-webkit-transition:All .5s ease;-moz-transition:All .5s ease;-o-transition:All .5s ease;-ms-transition:All .5s ease;transition:All .5s ease}#wachat{z-index:2}#wachat a img{width:70px}