counter-set

counter-set: none;

counter-set: chapter-count 0;

counter-set: chapter-count;

counter-set: chapter-count 5;

counter-set: chapter-count -5;

<section class="default-example" id="default-example">
  <div class="transition-all" id="chapters">
    <h1>Alice's Adventures in Wonderland</h1>
    <h2>Down the Rabbit-Hole</h2>
    <h2 id="example-element">The Pool of Tears</h2>
    <h2>A Caucus-Race and a Long Tale</h2>
    <h2>The Rabbit Sends in a Little Bill</h2>
  </div>
</section>

#default-example {
  text-align: left;
  counter-set: chapter-count;
}

#example-element {
  background-color: #37077c;
  color: white;
}

h2 {
  counter-increment: chapter-count;
  font-size: 1em;
}

h2::before {
  content: "Chapter " counter(chapter-count) ": ";
}

/* 将 "my-counter" 设置为 0 */
counter-set: my-counter;

/* 将 "my-counter" 设置为 -1 */
counter-set: my-counter -1;

/* 将 "counter1" 设置为 1，将 "counter2" 设置为 4 */
counter-set: counter1 1 counter2 4;

/* 取消在不太具体的规则中可能设置的任何计数器 */
counter-set: none;

/* 全局值 */
counter-set: inherit;
counter-set: initial;
counter-set: revert;
counter-set: revert-layer;
counter-set: unset;

h1 {
  counter-set: chapter section 1 page;
  /* 将章节和页面计数器设置为 0，
     将部分计数器设置为 1 */
}