Can you help me ? Thanks very much.

Challenge [Set the Font Family of an Element](https://freecodecamp.cn/challenges/set-the-font-family-of-an-element#?solution=%3Cstyle%3E%0A%20%20.red-text%20%7B%0A%20%20%20%20color%3A%20red%3B%0A%20%20%7D%0A%0A%20%20p%20%7B%0A%20%20%20%20font-size%3A%2016px%3B%0A%20%20%20font-family%3A%20Sans-serif%3B%0A%20%20%7D%0A%3C%2Fstyle%3E%0A%0A%3Ch2%20class%3D%22red-text%22%20%3ECatPhotoApp%3C%2Fh2%3E%0A%0A%3Cp%20class%3D%22red-text%22%20%3E%E5%9C%A8%E5%A4%A7%E5%AE%B6%E5%BF%83%E7%9B%AE%E4%B8%AD%EF%BC%8C%E7%8C%AB%E6%98%AF%E6%85%B5%E6%87%92%E7%9A%84%E5%8F%AF%E7%88%B1%E7%9A%84%E5%8C%96%E8%BA%AB%EF%BC%8C%E5%AE%83%E5%8F%AF%E4%BB%A5%E7%9D%A1%E9%A5%B1%E4%BA%86%E5%86%8D%E8%B5%B7%E6%9D%A5%E5%90%83%E9%A5%AD%EF%BC%8C%E5%8F%AF%E4%BB%A5%E9%80%97%E8%B6%A3%E5%B0%8F%E8%80%97%E5%AD%90%EF%BC%8C%E5%8F%AF%E4%BB%A5%E5%8D%96%E5%BE%97%E4%BA%86%E8%90%8C%EF%BC%8C%E4%BD%BF%E5%BE%97%E4%BA%86%E5%9D%8F%EF%BC%8C%E8%BF%99%E6%A0%B7%E7%99%BE%E5%8F%98%E7%9A%84%E5%B0%8F%E6%80%AA%E5%85%BD%E5%B0%B1%E9%9B%86%E7%BB%93%E5%9C%A8%E4%B8%80%E5%8F%AA%E5%AE%A0%E7%89%A9%E4%B8%8A%EF%BC%8C%E6%80%8E%E8%83%BD%E4%B8%8D%E6%83%B9%E4%BA%BA%E6%80%9C%E7%88%B1%E3%80%82%3C%2Fp%3E%0A%3Cp%3E%E5%85%BB%E5%8A%A8%E7%89%A9%E6%9C%89%E7%9A%84%E6%97%B6%E5%80%99%EF%BC%8C%E5%B0%B1%E6%98%AF%E4%BB%8B%E4%BA%8E%E7%88%B1%E4%B8%8E%E6%81%A8%E4%B9%8B%E9%97%B4%EF%BC%8C%E5%BD%93%E4%BD%A0%E9%92%A6%E7%BE%A1%E5%88%AB%E4%BA%BA%E8%90%8C%E5%AE%A0%E8%BF%99%E4%B9%88%E5%8F%AF%E7%88%B1%E7%9A%84%E6%97%B6%E5%80%99%EF%BC%8C%E4%BD%A0%E4%B8%80%E5%AE%9A%E6%B2%A1%E6%9C%89%E6%83%B3%E8%BF%87%EF%BC%8C%E7%8B%97%E7%8B%97%E5%92%8C%E7%8C%AB%E7%8C%AB%E4%BC%9A%E5%88%B0%E5%A4%84%E6%8B%89%E5%B1%8E%EF%BC%8C%E7%94%9A%E8%87%B3%E4%BC%9A%E5%B1%AF%E8%80%81%E9%BC%A0%EF%BC%8C%E5%95%83%E9%9E%8B%E5%AD%90%EF%BC%8C%E7%94%A8%E7%88%AA%E5%AD%90%E7%88%AC%E9%97%A8%EF%BC%8C%E4%BD%A0%E4%B8%8D%E7%90%86%E5%AE%83%EF%BC%8C%E5%AE%83%E5%B0%B1%E6%8C%A0%E4%BD%A0%EF%BC%8C%E4%BD%A0%E8%A6%81%E5%AF%B9%E5%AE%83%E5%8F%91%E8%84%BE%E6%B0%94%EF%BC%8C%E5%AE%83%E4%BC%9A%E6%AF%94%E4%BD%A0%E6%9B%B4%E6%9D%A5%E5%8A%B2%E3%80%82%E6%89%80%E4%BB%A5%EF%BC%8C%E7%8B%97%E7%8C%AB%E6%85%8E%E5%85%A5%EF%BC%8C%E6%B2%A1%E6%9C%89%E4%B8%80%E5%AE%9A%E7%9A%84%E5%87%86%E5%A4%87%EF%BC%8C%E5%88%87%E5%8B%BF%E9%9A%8F%E4%BE%BF%E5%8E%BB%E4%BE%8D%E5%85%BB%E5%8A%A8%E7%89%A9%E3%80%82%E5%AE%83%E4%BB%AC%E4%B8%80%E6%97%A6%E8%AE%A4%E5%AE%9A%E4%BD%A0%E4%BA%86%EF%BC%8C%E4%BD%A0%E5%B0%B1%E6%98%AF%E5%AE%83%E4%BB%AC%E7%9A%84%E4%B8%BB%E4%BA%BA%EF%BC%8C%E5%A6%82%E6%9E%9C%E4%BD%A0%E6%8A%9B%E5%BC%83%E5%AE%83%E4%BB%AC%EF%BC%8C%E5%AE%83%E4%BB%AC%E5%BF%85%E5%AE%9A%E5%BF%83%E4%B8%AD%E9%87%8D%E5%88%9B%E3%80%82%3C%2Fp%3E%0A) has an issue.
User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:
```html

.red-text {
color: red;
}

p {
font-size: 16px;
font-family: Sans-serif;
}

CatPhotoApp

在大家心目中，猫是慵懒的可爱的化身，它可以睡饱了再起来吃饭，可以逗趣小耗子，可以卖得了萌，使得了坏，这样百变的小怪兽就集结在一只宠物上，怎能不惹人怜爱。

养动物有的时候，就是介于爱与恨之间，当你钦羡别人萌宠这么可爱的时候，你一定没有想过，狗狗和猫猫会到处拉屎，甚至会屯老鼠，啃鞋子，用爪子爬门，你不理它，它就挠你，你要对它发脾气，它会比你更来劲。所以，狗猫慎入，没有一定的准备，切勿随便去侍养动物。它们一旦认定你了，你就是它们的主人，如果你抛弃它们，它们必定心中重创。

```

Open the linked “Set the Font Family of an Element” challenge and compare its stated requirements with the submitted HTML and CSS. Reproduce the behavior in the challenge interface, then confirm completion by determining whether the supplied solution is accepted and the expected font-family styling is applied.

Written by the indexing model from the issue text.