.layui-backtop{position:fixed;right:30px;bottom:40px;width:50px;height:50px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:40px;background-color:#9f9f9f;color:#fff;border-radius:var(--global-border-radius);opacity:.95;z-index:999999}.layui-backtop :hover{opacity:.85}.layui-backtop-medium{width:40px;height:40px;font-size:30px}.layui-backtop-small{width:30px;height:30px;font-size:20px}
