我不能让我的 CSS 计数器工作。它们以某种方式工作，但在嵌套级别递减时它们关闭。
这是我的测试页面：
<!DOCTYPE HTML>
<html>
<head>
<title>Chapter Numbering</title>
<style type="text/css">
div {
counter-reset: myitemcounter;
}
h3::before {
counter-increment: myitemcounter;
content: counters(myitemcounter, ".") " ";
}
</style>
</head>
<body>
<div>
<h3>This should be ... 1 </h3>
<h3>This should be ... 2 </h3>
<div>
<h3>This should be ... 2.1 </h3>
<h3>This should be ... 2.2 </h3>
<h3>This should be ... 2.3 </h3>
<div>
<h3>This should be ... 2.3.1 </h3>
<h3>This should be ... 2.3.2 </h3>
</div>
<h3>This should be ... …