:root{color:#171717;background:#fafafa;font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif}*{box-sizing:border-box}html,body,#app{width:100%;min-width:320px;height:100%;margin:0;overflow:hidden}.prototype-frame{background:#fafafa;border:0;width:100%;height:100%;display:block}
