.go-top {margin:0;padding:0;width:42px;height:36px;position:fixed;font-size:40px;display:none;bottom:10px;right:20px;background:#000000;border-radius:3px}
.go-top:before {position:absolute;border-style:solid;color:#FFFFFF;border-width:4px 4px 0 0;content:'';display:inline-block;height:20px;left:9px;top:13px;-webkit-transform: rotate(315deg);-moz-transform: rotate(315deg);transform: rotate(315deg);width:20px}
.go-top span{display:none}
.go-top:hover{background:#000}
.go-top:hover span{display:block;margin:0;font:15px verdana;text-decoration:none;float:right;padding:0 15px;color:#FFFFFF;width:auto;line-height:36px}
.go-top:hover{width:140px}