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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
85 changed files with 2566 additions and 0 deletions
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# 练习 11：居中专题
## 目标
练习最常见的内容居中写法。
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/11-centering-lab/starter.html)
- [starter.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/11-centering-lab/starter.css)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/11-centering-lab/answer.html)
- [answer.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/11-centering-lab/answer.css)

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body {
margin: 0;
font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.stage {
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background: linear-gradient(180deg, #fff7ed 0%, #fffbeb 100%);
}
.box {
padding: 28px 36px;
border-radius: 18px;
background: #ffffff;
border: 1px solid #fed7aa;
box-shadow: 0 20px 40px rgba(234, 88, 12, 0.12);
}

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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>居中专题</title>
<link rel="stylesheet" href="./answer.css" />
</head>
<body>
<div class="stage">
<div class="box">把我放到中间</div>
</div>
</body>
</html>

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02-css-layout/11-centering-lab/starter.css Normal file
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body {
}
.stage {
}
.box {
}

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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>居中专题</title>
<link rel="stylesheet" href="./starter.css" />
</head>
<body>
<div class="stage">
<div class="box">把我放到中间</div>
</div>
</body>
</html>