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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 9：Grid 布局
## 目标
掌握最基础的二维网格排版。
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/09-grid-layout/starter.html)
- [starter.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/09-grid-layout/starter.css)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/09-grid-layout/answer.html)
- [answer.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/09-grid-layout/answer.css)

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body {
margin: 0;
min-height: 100vh;
display: grid;
place-items: center;
background: #eff6ff;
font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.grid {
width: min(760px, calc(100% - 40px));
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 18px;
}
.cell {
padding: 28px;
background: #ffffff;
border: 1px solid #bfdbfe;
border-radius: 18px;
text-align: center;
font-weight: 700;
}

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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>Grid 布局</title>
<link rel="stylesheet" href="./answer.css" />
</head>
<body>
<section class="grid">
<div class="cell">HTML</div>
<div class="cell">CSS</div>
<div class="cell">JavaScript</div>
<div class="cell">TypeScript</div>
</section>
</body>
</html>

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body {
}
.grid {
}
.cell {
}

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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>Grid 布局</title>
<link rel="stylesheet" href="./starter.css" />
</head>
<body>
<section class="grid">
<div class="cell">HTML</div>
<div class="cell">CSS</div>
<div class="cell">JavaScript</div>
<div class="cell">TypeScript</div>
</section>
</body>
</html>