计数器（"div〉div"）的使用不正确
如果为容器提供一个类，则不需要div〉div

.container div::before {
  counter-increment: section; /* Increment the value of section counter by 1 */
  content: counter(section) ". "; /* Display the counter and a dot before the content of each nested div */
}

.container > :first-child {
  counter-reset: section;
}

<div class="container">
  <div>A</div>
  <div>B</div>
  <div>C</div>
  <div>D</div>
</div>

<div class="container">
  <div>Tiger</div>
  <div>Monkey</div>
  <div>Fox</div>
</div>

给container div一个类来在列表和初始化计数器之间重置它。

.container{
   counter-reset: my-counter;
}

div > div::before {
   counter-increment: my-counter;
   content: counter(my-counter) ". ";
}

<div class="container">
    <div>A</div>
    <div>B</div>
    <div>C</div>
    <div>D</div>
</div>
    
    
<div  class="container">
    <div>Tiger</div>
    <div>Monkey</div>
    <div>Fox</div>
</div>