首先上一个样式的例子
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title> This is my HTML</title> <!-- 定义样式--> <style type="text/css"> h2 {color: red} p {color: green} </style></head><body> <h2 id="红颜色">红颜色</h2> <p>绿颜色</p></body></html> HTML中常用的三种方式插入样式表
1>外部样式表
在一个工程中，每个页面的共同部分可以采用外部样式表。使用外部样式表，我们可以通过更改一个文件来改变整个工程的外观。
<head><link rel="stylesheet" type="text/css" href="mySelfStyle.css"></head>
如下图是我的这次工程中的一个页面用到的外部样式表
2>内部样式表
当单个文件需要特别样式时，可以使用内部样式表，我们可以在head中通过
<head> <style type="text/css"> body {background-color: red} p {margin-left: 20px} </style></head> 3>内联样式
当特殊的样式需要应用到个别元素时，就可以使用内联样式。使用内联样式的方法是在相关的标签中使用样式属性。
<p style="color: red; margin-left: 100px">设置段落颜色为红色，距离左边100px</p>
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