.go-to-top{border-radius:100px;box-shadow:0 0 10px 10px #0000000d;cursor:pointer;display:block;height:48px;line-height:45px;opacity:0;position:fixed;right:30px;text-align:center;top:90px;transition-duration:.2s;width:48px;z-index:999}.go-to-top.show{bottom:30px;opacity:1;transition-duration:.2s}