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
85 changed files with 2566 additions and 0 deletions

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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>