.up-top{float:right;z-index:100;width:auto}.up-top span{font-size:16px;color:#9fa3a7;margin-right:16px;display:inline-block;position:relative;top:4px}.back-to-top{display:inline-block;width:auto;font-size:20px;padding:1px 8px 4px;border-radius:4px;background:#34495e;cursor:pointer}