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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 1：选择器与文本样式
## 目标
掌握最基础的 CSS 选择器和文字样式。
## 你要练什么
- 元素选择器
- 类选择器
- `color`
- `font-size`
- `font-weight`
- `line-height`
- `background-color`
## 任务
请把页面排成一个简洁的学习卡片，要求：
- 页面背景换成浅色
- 主标题颜色更明显
- 介绍段落提高可读性
- 给提示文字单独加一个背景色块
- 给列表中的重点项单独强调
## 文件
- [starter.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/01-selectors-and-text/starter.html)
- [starter.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/01-selectors-and-text/starter.css)
- [answer.html](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/01-selectors-and-text/answer.html)
- [answer.css](/Volumes/Macintosh HD 1/home/front-end-example/02-css-layout/01-selectors-and-text/answer.css)

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body {
margin: 0;
background-color: #f5f7fb;
color: #1f2937;
font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.card {
width: 720px;
margin: 48px auto;
padding: 24px;
background-color: #ffffff;
border: 1px solid #dbe3ee;
border-radius: 16px;
}
h1 {
color: #1d4ed8;
font-size: 32px;
}
.intro {
font-size: 16px;
line-height: 1.8;
}
.note {
background-color: #e0f2fe;
color: #0f172a;
padding: 12px;
border-radius: 10px;
}
.important {
color: #b45309;
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>选择器与文本样式</title>
<link rel="stylesheet" href="./answer.css" />
</head>
<body>
<div class="card">
<h1>CSS 入门练习</h1>
<p class="intro">CSS 负责页面的视觉和布局。你现在要做的是把这段内容排得更清晰。</p>
<p class="note">练习重点：选择器、颜色、字号、行高。</p>
<h2>本次任务</h2>
<ul>
<li>调整页面背景</li>
<li class="important">强调主标题和重点项</li>
<li>让段落更容易阅读</li>
</ul>
</div>
</body>
</html>

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body {
}
.card {
}
h1 {
}
.intro {
}
.note {
}
.important {
}

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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>选择器与文本样式</title>
<link rel="stylesheet" href="./starter.css" />
</head>
<body>
<div class="card">
<h1>CSS 入门练习</h1>
<p class="intro">CSS 负责页面的视觉和布局。你现在要做的是把这段内容排得更清晰。</p>
<p class="note">练习重点：选择器、颜色、字号、行高。</p>
<h2>本次任务</h2>
<ul>
<li>调整页面背景</li>
<li class="important">强调主标题和重点项</li>
<li>让段落更容易阅读</li>
</ul>
</div>
</body>
</html>