代码示例：（标识：css_gen_counter-reset）
<!DOCTYPE html>
<html>
<head>
<style>
body {
counter-reset: section;
}
h1 {
counter-reset: subsection;
}
h1:before {
counter-increment: section;
content: "板块 " counter(section) ". ";
}
h2:before {
counter-increment: subsection;
content: counter(section) "." counter(subsection) " ";
}
</style>
</head>
<body>
<h1>HTML 教程</h1>
<h2>HTML 教程</h2>
<h2>XHTML 教程</h2>
<h2>CSS 教程</h2>
<h1>Scripting 教程</h1>
<h2>JavaScript</h2>
<h2>JQuery</h2>
<h1>XML 教程</h1>
<h2>XML</h2>
<h2>XSL</h2>
</body>
</html>
