.actGotop{ position:fixed; z-index:10000; bottom:100px;right:50px;width:38px;height:38px;display:none;}
.actGotop a,.actGotop a:link{width:40px;height:40px; display:flex;background:url(ico_top-8b7c.png) no-repeat center center #fff;background-color:rgba(0,0,0,.5);align-items:center;justify-content:center;}
.actGotop a:hover{ background-color:#000; background-position:center;}