feat: Add CSS layout exercises and corresponding HTML files

- Created multiple exercises under the CSS layout section, including:
  - Final page layout with CSS styles and HTML structure.
  - Display and flow concepts with examples of block, inline, and none display types.
  - Selectors and pseudo-classes with practical examples.
  - Overflow and sizing handling in CSS.
  - Grid layout basics for two-dimensional layouts.
  - Fixed and sticky positioning examples.
  - Centering techniques for common layout scenarios.

- Added README files for each exercise to outline objectives and file structures.
- Updated main README to include new sections and usage instructions.
This commit is contained in:
chali
2026-03-09 14:16:22 +08:00
commit 4495ae0e28
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# 练习 9嵌套纠错
## 目标
训练你检查 HTML 结构是否写错。
## 你要练什么
- 标签闭合
- 父子关系
- 列表嵌套
- 表单结构
## 任务
先看 `starter.html`,里面故意写了一些常见错误。你的任务是自己修正,再对照 `answer.html`
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/01-html-structure/09-nesting-review/starter.html)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/01-html-structure/09-nesting-review/answer.html)

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>嵌套纠错</title>
</head>
<body>
<h1>HTML 纠错练习</h1>
<p>下面这些结构已经修正完成。</p>
<ul>
<li>列表项 1</li>
<li>列表项 2</li>
</ul>
<p><a href="#">这里改成更清晰的链接结构</a></p>
<form>
<label for="email">邮箱</label>
<input id="email" name="email" type="email" />
<button type="submit">提交</button>
</form>
</body>
</html>

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>嵌套纠错</title>
</head>
<body>
<h1>HTML 纠错练习</h1>
<p>下面这些结构有错误,请你自己修正。
<ul>
<li>列表项 1
<li>列表项 2</li>
</ul>
<a href="#">
<p>这里的嵌套写法是否合理?</p>
</a>
<form>
<label for="email">邮箱</label>
<input id="email" name="email">
<button>提交
</form>
</body>
</html>