本文简单的讲解了如何使用css3实现简单的响应式布局：
css3文件：
*{ margin:0px; padding: 0px;}.heading,.container,.footing{ margin: 10px auto;}.heading{ height: 100px; background-color: red;}.left,.right,.main{ height: 300px; background-color: yellow;}.footing{ height: 100px; background-color: gray;}<!--media="only screen and (max-width:640px)" 这句话的意思是:只要当渲染屏幕的宽度不大于640px的时候才会使用这个样式表-->@media screen and (min-width: 960px){ .heading, .container, .footing{ width:960px; } .left, .main, .right{ float: left; height: 500px; } .left, .right{ width:200px; } .main{ margin: 0px 5px; width:550px; } .container{ height: 500px; }}@media screen and (min-width: 600px) and (max-width: 960px){ .heading, .container, .footing{ width: 600px; } .left, .main{ float: left; height:400px; } .right{ display: none; } .left{ width: 160px; } .main{ width: 435px; margin-left: 5px; } .container{ height: 400px; }}@media screen and (max-width: 600px){ .heading, .container, .footing{ width: 400px; } .left, .right{ width: 400px; height: 100px; } .main{ margin-top: 10px; width:400px; height:200px; } .right{ margin-top: 10px; } .container{ height: 420px; }}html5文件:
<!DOCTYPE html><html><head> <meta charset="UTF-8"> <meta name ="viewport" content="width = device-width,initial-scale=1"> <title>index01</title> <link href="style01.css" type="text/css" rel="stylesheet"></head><body> <p></p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p> <p> <p></p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p> <p></p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p> <p></p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p> </p> <p></p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p></body></html>
本文的代码，可以实现同一个界面，在不同宽度的渲染宽度下显示不同的布局。
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