fix: replace .chinese.md extension with .md

curriculum/challenges/chinese/01-responsive-web-design/css-grid/create-grids-within-grids.md

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+---
+id: 5a94fe8569fb03452672e464
+title: Create Grids within Grids
+challengeType: 0
+videoUrl: 'https://scrimba.com/p/pByETK/c6N78Ap'
+forumTopicId: 301128
+localeTitle: 在网格中创建网格
+---
+
+## Description
+<section id='description'>
+将元素转换为网格只会影响其子代元素。因此，在把某个子代元素设置为网格后，就会得到一个嵌套的网格。
+例如，设置类为<code>item3</code>的元素的<code>display</code>和<code>grid-template-columns</code>属性，就会得到一个嵌套的网格。
+</section>
+
+## Instructions
+<section id='instructions'>
+用<code>display</code>和<code>grid-template-columns</code>，使类为<code>item3</code>元素转换为有两列且宽度为<code>auto</code>和<code>1fr</code>的网格。
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: '<code>item3</code>类应该有<code>grid-template-columns</code>属性且值为<code>auto</code>和<code>1fr</code>。'
+    testString: assert(code.match(/.item3\s*?{[\s\S]*grid-template-columns\s*?:\s*?auto\s*?1fr\s*?;[\s\S]*}/gi));
+  - text: '<code>item3</code>类有<code>display</code>属性且值为<code>grid</code>。'
+    testString: assert(code.match(/.item3\s*?{[\s\S]*display\s*?:\s*?grid\s*?;[\s\S]*}/gi));
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+
+<div id='html-seed'>
+
+```html
+<style>
+  .container {
+    font-size: 1.5em;
+    min-height: 300px;
+    width: 100%;
+    background: LightGray;
+    display: grid;
+    grid-template-columns: auto 1fr;
+    grid-template-rows: auto 1fr auto;
+    grid-gap: 10px;
+    grid-template-areas:
+      "advert header"
+      "advert content"
+      "advert footer";
+  }
+  .item1 {
+    background: LightSkyBlue;
+    grid-area: header;
+  }
+  
+  .item2 {
+    background: LightSalmon;
+    grid-area: advert;
+  }
+  
+  .item3 {
+    background: PaleTurquoise;
+    grid-area: content;
+    /* 请在本行以下添加你的代码 */
+    
+    
+    /* 请在本行以上添加你的代码 */
+  }
+  
+  .item4 {
+    background: lightpink;
+    grid-area: footer;
+  }
+  
+  .itemOne {
+    background: PaleGreen;
+  }
+  
+  .itemTwo {
+    background: BlanchedAlmond;
+  }
+  
+</style>
+  
+<div class="container">
+  <div class="item1">header</div>
+  <div class="item2">advert</div>
+  <div class="item3">
+    <div class="itemOne">paragraph1</div>
+    <div class="itemTwo">paragraph2</div>
+  </div>
+  <div class="item4">footer</div>
+</div>
+```
+
+</div>
+
+
+
+</section>
+
+## Solution
+<section id='solution'>
+
+
+```js
+// solution required
+```
+
+</section>
+