chore(learn): Applied MDX format to Chinese curriculum files (#40462)

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Randell Dawson
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---
id: 5a9d726c424fe3d0e10cad11
title: 创建一个自定义的 CSS 变量
challengeType: 0
videoUrl: 'https://scrimba.com/c/cQd27Hr'
forumTopicId: 301086
title: 创建一个自定义的 CSS 变量
---
## Description
<section id='description'>
创建一个 CSS 变量,你只需要在变量名前添加两个<code>破折号</code>,并为其赋值,例子如下:
# --description--
创建一个 CSS 变量,你只需要在变量名前添加两个`破折号`,并为其赋值,例子如下:
```css
--penguin-skin: gray;
```
这样会创建一个<code>--penguin-skin</code>变量并赋值为<code>gray灰色</code>
现在,其他元素可通过该变量来设置为<code>gray灰色</code>
</section>
这样会创建一个`--penguin-skin`变量并赋值为`gray灰色`。 现在,其他元素可通过该变量来设置为`gray灰色`
## Instructions
<section id='instructions'>
<code>penguin</code>class 里面,创建一个<code>--penguin-skin</code>变量,且赋值为<code>gray灰色</code>
</section>
# --instructions--
## Tests
<section id='tests'>
`penguin`class 里面,创建一个`--penguin-skin`变量,且赋值为`gray灰色`
```yml
tests:
- text: '<code>penguin</code> class 里应声明<code>--penguin-skin</code>变量,且赋值为<code>gray</code>。'
testString: assert(code.match(/.penguin\s*?{[\s\S]*--penguin-skin\s*?:\s*?gray\s*?;[\s\S]*}/gi));
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
.penguin {
/* add code below */
/* add code above */
position: relative;
margin: auto;
display: block;
margin-top: 5%;
width: 300px;
height: 300px;
}
.penguin-top {
top: 10%;
left: 25%;
background: black;
width: 50%;
height: 45%;
border-radius: 70% 70% 60% 60%;
}
.penguin-bottom {
top: 40%;
left: 23.5%;
background: black;
width: 53%;
height: 45%;
border-radius: 70% 70% 100% 100%;
}
.right-hand {
top: 0%;
left: -5%;
background: black;
width: 30%;
height: 60%;
border-radius: 30% 30% 120% 30%;
transform: rotate(45deg);
z-index: -1;
}
.left-hand {
top: 0%;
left: 75%;
background: black;
width: 30%;
height: 60%;
border-radius: 30% 30% 30% 120%;
transform: rotate(-45deg);
z-index: -1;
}
.right-cheek {
top: 15%;
left: 35%;
background: white;
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
.left-cheek {
top: 15%;
left: 5%;
background: white;
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
.belly {
top: 60%;
left: 2.5%;
background: white;
width: 95%;
height: 100%;
border-radius: 120% 120% 100% 100%;
}
.right-feet {
top: 85%;
left: 60%;
background: orange;
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(-80deg);
z-index: -2222;
}
.left-feet {
top: 85%;
left: 25%;
background: orange;
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(80deg);
z-index: -2222;
}
.right-eye {
top: 45%;
left: 60%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
.left-eye {
top: 45%;
left: 25%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
.sparkle {
top: 25%;
left: 15%;
background: white;
width: 35%;
height: 35%;
border-radius: 50%;
}
.blush-right {
top: 65%;
left: 15%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
.blush-left {
top: 65%;
left: 70%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
.beak-top {
top: 60%;
left: 40%;
background: orange;
width: 20%;
height: 10%;
border-radius: 50%;
}
.beak-bottom {
top: 65%;
left: 42%;
background: orange;
width: 16%;
height: 10%;
border-radius: 50%;
}
body {
background:#c6faf1;
}
.penguin * {
position: absolute;
}
</style>
<div class="penguin">
<div class="penguin-bottom">
<div class="right-hand"></div>
<div class="left-hand"></div>
<div class="right-feet"></div>
<div class="left-feet"></div>
</div>
<div class="penguin-top">
<div class="right-cheek"></div>
<div class="left-cheek"></div>
<div class="belly"></div>
<div class="right-eye">
<div class="sparkle"></div>
</div>
<div class="left-eye">
<div class="sparkle"></div>
</div>
<div class="blush-right"></div>
<div class="blush-left"></div>
<div class="beak-top"></div>
<div class="beak-bottom"></div>
</div>
</div>
```
</div>
</section>
## Solution
<section id='solution'>
# --hints--
`penguin` class 里应声明`--penguin-skin`变量,且赋值为`gray`
```js
// solution required
assert(
code.match(/.penguin\s*?{[\s\S]*--penguin-skin\s*?:\s*?gray\s*?;[\s\S]*}/gi)
);
```
</section>
# --solutions--