html,body{margin:0;background:white;font:14px -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:#60776f}body{padding:18px;box-sizing:border-box}#captcha{width:100%;max-width:340px;margin:0 auto}#hint{text-align:center;margin:16px 0;line-height:1.6}