.scroll-top-btn{position:fixed;bottom:20px;width:48px;height:48px;border-radius:48px;background-color:#fff;box-shadow:0 0 1px rgba(0,0,0,.08),0 4px 12px rgba(0,0,0,.2);left:50%;transform:translateX(-50%);display:flex;flex-direction:row;justify-content:center;align-items:center;z-index:1000;cursor:pointer}.scroll-top-btn::after{width:16px;height:18px}.scroll-top-btn::after{content:url(/rp/rMt7f6PZW0YrWAzoRySbd9mFHgw.svg)}