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feat: Add CSS layout exercises and corresponding HTML files

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- 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 7：图片、视频与路径
## 目标
掌握媒体标签和资源路径的基础写法。
## 你要练什么
- `img`
- `video`
- `src`
- `alt`
- `controls`
## 任务
请完成一个“课程展示页”，要求包含：
- 一个课程封面图
- 一段图片说明
- 一个视频区域
- 一个下载讲义链接
资源文件可以先用占位路径，不要求真实可播放。
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/01-html-structure/07-media-and-paths/starter.html)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/01-html-structure/07-media-and-paths/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>图片、视频与路径</title>
</head>
<body>
<h1>课程展示页</h1>
<img src="./images/html-cover.png" alt="HTML 结构课程封面" />
<p>这是一门面向初学者的 HTML 结构课程。</p>
<video src="./videos/html-intro.mp4" controls></video>
<p><a href="./docs/html-notes.pdf">下载讲义</a></p>
</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>图片、视频与路径</title>
</head>
<body>
<!-- 任务：
1. 写一个 img，并补上 alt
2. 写一个 video，并加上 controls
3. 写一个下载讲义的 a 标签
-->
</body>
</html>