.ant-back-top{box-sizing:border-box;margin:0;padding:0;color:#1b1b1b;font-size:14px;font-variant:tabular-nums;line-height:1.5715;list-style:none;font-feature-settings:"tnum";position:fixed;right:100px;bottom:50px;z-index:10;width:40px;height:40px;cursor:pointer}.ant-back-top:empty{display:none}.ant-back-top-rtl{right:auto;left:100px;direction:rtl}.ant-back-top-content{width:40px;height:40px;overflow:hidden;color:#fff;text-align:center;background-color:#666;border-radius:20px;transition:all .3s}.ant-back-top-content:hover{background-color:#1b1b1b;transition:all .3s}.ant-back-top-icon{font-size:24px;line-height:40px}@media screen and (max-width: 768px){.ant-back-top{right:60px}}@media screen and (max-width: 480px){.ant-back-top{right:20px}}