:root{--base-color:#043A69}#btn_top{position:fixed;bottom:2%;z-index:99;right:-30px;width:60px;height:35px;line-height:35px;padding-left:10px;text-align:left;border-radius:20px;background-color:#fff;box-shadow:0 0 12px rgba(0,0,0,.16);cursor:pointer}#btn_top .iconfont{font-size:17px;font-weight:700;color:#043a69}