.znl-back-top{background-color:#fff;position:fixed;right:100px;bottom:100px;width:40px;height:40px;line-height:40px;border-radius:20px;cursor:pointer;-webkit-transition:.3s;transition:.3s;-webkit-box-shadow:0 0 6px rgba(0,0,0,.12);box-shadow:0 0 6px rgba(0,0,0,.12);z-index:10;text-align:center}.znl-back-top.hide{display:none}.znl-back-top-fade-enter,.znl-back-top-fade-leave-active{-webkit-transform:translateY(-30px);transform:translateY(-30px);opacity:0}