.gv-top{width:48px;height:48px;border-radius:50%;position:fixed;right:25px;bottom:100px;z-index:999;transition:all .3s;cursor:pointer;overflow:hidden;background-color:#fff;box-shadow:0px 2px 10px 0px rgba(0,0,0,0.08);background-size:29.166% auto;background-repeat:no-repeat;background-position:center center;cursor:pointer;background-image:url(../images/gv_top.png)}
.gv-top.hide{visibility:hidden;opacity:0}
.gv-top:after{content:"";display:block;width:1px;height:1px;background-image:url(../images/gv_top-b.png);position:absolute;left:-10px;top:0}
@media(min-width:1201px){
    .gv-top:hover{background-color:#005BFE;background-image:url(../images/gv_top-b.png)}
}
@media(max-width:992px){
    .gv-top{width:40px;height:40px;right:16px;bottom:80px}
    .gv-top.hide-phone{visibility:hidden;opacity:0}
}