计数器复位 | counter-reset

/* Set "my-counter" to 0 */
counter-reset: my-counter;

/* Set "my-counter" to -1 */
counter-reset: my-counter -1;

/* Set "counter1" to 1, and "counter2" to 4 */
counter-reset: counter1 1 counter2 4;

/* Cancel any reset that could have been set in less specific rules */
counter-reset: none;

/* Global values */
counter-reset: inherit;
counter-reset: initial;
counter-reset: unset;

[ <custom-ident> <integer>? ]+ | none

h1 {
  counter-reset: chapter section 1 page;
  /* Sets the chapter and page counters to 0,
     and the section counter to 1 */
}