在style标签的最后两段代码，按照要求添加的Id选择器，代码无法通过，并无明显错误，不知道什么原因？

Challenge [Use an ID Attribute to Style an Element](https://www.freecodecamp.cn/challenges/use-an-id-attribute-to-style-an-element#?solution=%3Clink%20href%3D%22https%3A%2F%2Ffonts.gdgdocs.org%2Fcss%3Ffamily%3DLobster%22%20rel%3D%22stylesheet%22%20type%3D%22text%2Fcss%22%3E%0A%3Cstyle%3E%0A%20%20.red-text%20%7B%0A%20%20%20%20color%3A%20red%3B%0A%20%20%7D%0A%0A%20%20h2%20%7B%0A%20%20%20%20font-family%3A%20Lobster%2C%20Monospace%3B%0A%20%20%7D%0A%0A%20%20p%20%7B%0A%20%20%20%20font-size%3A%2016px%3B%0A%20%20%20%20font-family%3A%20Monospace%3B%0A%20%20%7D%0A%0A%20%20.thick-green-border%20%7B%0A%20%20%20%20border-color%3A%20green%3B%0A%20%20%20%20border-width%3A%2010px%3B%0A%20%20%20%20border-style%3A%20solid%3B%0A%20%20%20%20border-radius%3A%2050%25%3B%0A%20%20%7D%0A%0A%20%20.smaller-image%20%7B%0A%20%20%20%20width%3A%20100px%3B%0A%20%20%7D%0A%0A%20%20.gray-background%20%7B%0A%20%20%20%20background-color%3A%20gray%3B%0A%20%20%7D%0A%20%20%0A%20%20%23cat-photo-form%20%7B%0A%20%20%20%20background-color%3Agreen%3B%0A%20%20%7D%0A%3C%2Fstyle%3E%0A%0A%3Ch2%20class%3D%22red-text%22%3ECatPhotoApp%3C%2Fh2%3E%0A%0A%3Cp%3EClick%20here%20for%20%3Ca%20href%3D%22%23%22%3Ecat%20photos%3C%2Fa%3E.%3C%2Fp%3E%0A%0A%3Ca%20href%3D%22%23%22%3E%3Cimg%20class%3D%22smaller-image%20thick-green-border%22%20alt%3D%22A%20cute%20orange%20cat%20lying%20on%20its%20back%22%20src%3D%22%2Fimages%2Frelaxing-cat.jpg%22%3E%3C%2Fa%3E%0A%0A%3Cdiv%20class%3D%22gray-background%22%3E%0A%20%20%3Cp%3EThings%20cats%20love%3A%3C%2Fp%3E%0A%20%20%3Cul%3E%0A%20%20%20%20%3Cli%3Ecat%20nip%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Elaser%20pointers%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Elasagna%3C%2Fli%3E%0A%20%20%3C%2Ful%3E%0A%20%20%3Cp%3ETop%203%20things%20cats%20hate%3A%3C%2Fp%3E%0A%20%20%3Col%3E%0A%20%20%20%20%3Cli%3Eflea%20treatment%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Ethunder%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Eother%20cats%3C%2Fli%3E%0A%20%20%3C%2Fol%3E%0A%3C%2Fdiv%3E%0A%0A%3Cform%20id%3D%22cat-photo-form%22%20fccfaa%3D%22%2Fsubmit-cat-photo%22%20%3E%0A%20%20%3Clabel%3E%3Cinput%20type%3D%22radio%22%20name%3D%22indoor-outdoor%22%20checked%3E%20Indoor%3C%2Flabel%3E%0A%20%20%3Clabel%3E%3Cinput%20type%3D%22radio%22%20name%3D%22indoor-outdoor%22%3E%20Outdoor%3C%2Flabel%3E%0A%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%20checked%3E%20Loving%3C%2Flabel%3E%0A%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%3E%20Lazy%3C%2Flabel%3E%0A%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%3E%20Energetic%3C%2Flabel%3E%0A%20%20%3Cinput%20type%3D%22text%22%20placeholder%3D%22cat%20photo%20URL%22%20required%3E%0A%20%20%3Cbutton%20type%3D%22submit%22%3ESubmit%3C%2Fbutton%3E%0A%3C%2Fform%3E%0A) has an issue.
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.2 Safari/605.1.15.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:
```html

.red-text {
color: red;
}

h2 {
font-family: Lobster, Monospace;
}

p {
font-size: 16px;
font-family: Monospace;
}

.thick-green-border {
border-color: green;
border-width: 10px;
border-style: solid;
border-radius: 50%;
}

.smaller-image {
width: 100px;
}

.gray-background {
background-color: gray;
}

#cat-photo-form {
background-color:green;
}

CatPhotoApp

Click here for cat photos.

Indoor
Outdoor
Loving
Lazy
Energetic

Submit

```

Open the linked “Use an ID Attribute to Style an Element” challenge and reproduce the failure with the submitted HTML and CSS. Compare the challenge requirements with the form’s #cat-photo-form selector and markup, then verify the challenge passes after the discrepancy is identified.

Written by the indexing model from the issue text.