.scrollup{display:none;position:fixed;right:10px;top:calc(50% - 50px);width:40px;height:70px;border-radius:30px;cursor:pointer;opacity:.9;background-color:#c3c6c9;-webkit-transition:background .4s;transition:background .4s;z-index:20}.scrollup::after,.scrollup::before{position:absolute;top:30px;left:18px;display:block;content:'';width:17px;height:1px;background:#fff;-webkit-transform:rotate(50deg);-ms-transform:rotate(50deg);transform:rotate(50deg)}.scrollup::after{-webkit-transform:rotate(-50deg);-ms-transform:rotate(-50deg);transform:rotate(-50deg);left:7px;right:10px}.scrollup__inner{position:absolute;width:1px;height:25px;background-color:#fff;top:calc(50% - 10px);left:50%}