html:
<!DOCTYPE html>
<html>
<head>
<title>My webpage</title>
</head>
<body>
<div>
<h1>My first div</h1>
<p>This div uses inline CSS to style its content.</p>
<style>
h1 {
color: red;
}
p {
font-size: 16px;
text-align: center;
}
</style>
</div>
<div>
<h1>My second div</h1>
<p>This div uses an external CSS file to style its content.</p>
<link rel="stylesheet" type="text/css" href="styles.css">
</div>
<div>
<h1>My third div</h1>
<p>This div uses an embedded style sheet to style its content.</p>
<style>
/* This is an embedded style sheet */
h1 {
color: blue;
}
p {
font-size: 14px;
text-align: left;
}
</style>
</div>
</body>
</html>
style.css:
/* This is an external style sheet */
h1 {
color: green;
}
p {
font-size: 18px;
text-align: right;
}
这段代码中，第一个div使用内联CSS来样式其内容，第二个div使用外部CSS文件来样式其内容，第三个div使用嵌入式样式表来样式其内容。