#topBtn{display:none;position:fixed;bottom:30px;right:30px;z-index:999;cursor:pointer;height:36px;width:36px;box-sizing:border-box;padding-top:6px;transition:all .3s ease}#topBtn svg{width:auto;height:24px;fill:#fff;transition:all .3s ease}#topBtn:hover{background-color:white}