.back_to_top{padding:3px;width:45px;height:45px;border-radius:50%;position:fixed;bottom:50px;right:50px;overflow:hidden;text-align:center;cursor:pointer;background-color:#183484;border:5px solid #00a5ff;display:block;z-index:10}.back_to_top:hover{cursor:pointer}.back_to_top span{color:#fff;font-size:26px;position:absolute;top:-2px;right:6px}