.to-top{position:fixed;right:10px;bottom:10px;background:rgba(37,37,37,.8);width:45px;height:45px;color:#fff;border-radius:100%;cursor:pointer;text-align:center;opacity:0;transform:scale(0);transition:all .4s;z-index:100}.to-top i{width:100%;height:100%;font-size:30px;line-height:44px}.to-top:hover{background:#252525}.to-top.show{transform:scale(1);opacity:1}@media (min-width:992px){.to-top{width:55px;height:55px;right:30px;bottom:30px}.to-top i{font-size:30px;line-height:52px}}