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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 10：Fixed 与 Sticky
## 目标
理解固定定位和粘性定位的使用场景。
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/10-fixed-and-sticky/starter.html)
- [starter.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/10-fixed-and-sticky/starter.css)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/10-fixed-and-sticky/answer.html)
- [answer.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/10-fixed-and-sticky/answer.css)

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body {
margin: 0;
background: #f8fafc;
font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.help {
position: fixed;
right: 20px;
bottom: 20px;
padding: 12px 16px;
border-radius: 999px;
background: #0f766e;
color: #ffffff;
text-decoration: none;
}
.page {
width: min(760px, calc(100% - 40px));
margin: 0 auto;
}
.topbar {
position: sticky;
top: 0;
padding: 16px;
background: #ffffff;
border-bottom: 1px solid #cbd5e1;
font-weight: 700;
}
.content {
min-height: 1200px;
padding: 24px 0 80px;
}

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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>Fixed 与 Sticky</title>
<link rel="stylesheet" href="./answer.css" />
</head>
<body>
<a class="help" href="#">帮助</a>
<section class="page">
<header class="topbar">学习导航</header>
<div class="content">
<p>向下滚动时观察导航位置。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
</div>
</section>
</body>
</html>

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body {
}
.help {
}
.page {
}
.topbar {
}
.content {
}

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02-css-layout/10-fixed-and-sticky/starter.html Normal file
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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>Fixed 与 Sticky</title>
<link rel="stylesheet" href="./starter.css" />
</head>
<body>
<a class="help" href="#">帮助</a>
<section class="page">
<header class="topbar">学习导航</header>
<div class="content">
<p>向下滚动时观察导航位置。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
<p>这里放一些占位内容。</p>
</div>
</section>
</body>
</html>