.ScrolltopBtn_scrolltopBtn__7KU_4{position:fixed;border:none;border-radius:100%;cursor:pointer;background-color:rgba(0,0,0,.3);z-index:800}@media(min-width:0){.ScrolltopBtn_scrolltopBtn__7KU_4{width:48px;height:48px;left:auto;bottom:20px;right:25px}}@media(min-width:1280px){.ScrolltopBtn_scrolltopBtn__7KU_4{width:64px;height:64px;left:40px;bottom:40px}}