.page-faq {
  --faq-rail: 5rem;
  --faq-gap: clamp(0.6rem, 2vw, 1.25rem);
  --faq-narrow: 64rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  margin-top: clamp(1.25rem, 3vw, 2.25rem);
}

.page-faq .faq-hero__title {
  margin: 0.4rem 0 1rem;
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  color: var(--wh-mist);
  opacity: 0.88;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--wh-line);
  border: 1px solid var(--wh-line);
  border-radius: var(--wh-radius-lg);
  overflow: hidden;
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  background: var(--wh-archive);
}

.page-faq .faq-stat__num {
  font-family: var(--wh-mono);
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--wh-yellow);
  line-height: 1.1;
}

.page-faq .faq-stat__label {
  color: var(--wh-gray);
  text-align: right;
}

.page-faq .faq-hero__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

/* ---------- 分类跳转带 ---------- */
.page-faq .faq-jump {
  padding: clamp(0.9rem, 2.5vw, 1.35rem) 0;
  border-top: 1px solid var(--wh-line);
  border-bottom: 1px solid var(--wh-line);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump .wh-chip {
  display: inline-block;
  transition: background-color 0.22s var(--wh-ease), color 0.22s var(--wh-ease),
    border-color 0.22s var(--wh-ease), transform 0.22s var(--wh-ease);
}

.page-faq .faq-jump .wh-chip:hover,
.page-faq .faq-jump .wh-chip:focus-visible {
  border-color: var(--wh-yellow);
  color: var(--wh-yellow);
  transform: translateY(-1px);
}

/* ---------- 问答章节 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 6rem;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.75rem, 2vw, 1.5rem);
  align-items: start;
  border-top: 1px solid var(--wh-line);
  padding-top: clamp(0.9rem, 2.5vw, 1.4rem);
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .faq-block__num {
  font-family: var(--wh-mono);
  font-size: clamp(1.9rem, 6vw, 3.25rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 0.9;
  color: var(--wh-grass);
  letter-spacing: -0.03em;
}

.page-faq .faq-block__meta {
  display: grid;
  gap: 0.35rem;
}

.page-faq .faq-block__meta .wh-title--section {
  margin: 0;
  color: var(--wh-mist);
}

.page-faq .faq-block__split {
  align-items: start;
}

.page-faq .faq-block__figure {
  margin: 0;
}

/* ---------- 问题条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0;
  max-width: var(--faq-narrow);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--wh-line);
  scroll-margin-top: 6rem;
}

.page-faq .faq-item:first-child {
  border-top: 1px solid var(--wh-line);
}

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr) auto;
  gap: var(--faq-gap);
  align-items: start;
  padding: clamp(0.95rem, 2.5vw, 1.3rem) 0;
  cursor: pointer;
  list-style: none;
  border-radius: var(--wh-radius-sm);
}

.page-faq .faq-item__head::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__head::marker {
  content: "";
}

.page-faq .faq-item__no {
  font-family: var(--wh-mono);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--wh-gray);
  padding-top: 0.2rem;
  transition: color 0.22s var(--wh-ease), transform 0.22s var(--wh-ease);
}

.page-faq .faq-item__q {
  font-size: clamp(1.02rem, 2.4vw, 1.28rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--wh-mist);
  transition: color 0.22s var(--wh-ease);
}

.page-faq .faq-item__head::after {
  content: "展开";
  align-self: center;
  font-family: var(--wh-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--wh-gray);
  border: 1px solid var(--wh-line-soft);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  white-space: nowrap;
  transition: background-color 0.22s var(--wh-ease), color 0.22s var(--wh-ease),
    border-color 0.22s var(--wh-ease);
}

.page-faq .faq-item[open] .faq-item__head::after {
  content: "收起";
  background: var(--wh-yellow);
  border-color: var(--wh-yellow);
  color: var(--wh-ink-deep);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--wh-yellow);
}

.page-faq .faq-item__head:hover .faq-item__no {
  transform: translateX(2px);
  color: var(--wh-yellow);
}

.page-faq .faq-item__head:hover .faq-item__q {
  color: var(--wh-yellow);
}

.page-faq .faq-item__head:focus-visible {
  outline: 2px solid var(--wh-yellow);
  outline-offset: 4px;
}

.page-faq .faq-item__body {
  padding: 0 0 clamp(1.1rem, 3vw, 1.6rem) calc(var(--faq-rail) + var(--faq-gap));
  max-width: 62ch;
  color: var(--wh-mist);
  opacity: 0.9;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-item__body a {
  color: var(--wh-yellow);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.page-faq .faq-item__body a:hover {
  color: var(--wh-mint);
}

.page-faq .faq-item--wide .faq-item__body {
  max-width: 68ch;
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
  padding: clamp(2rem, 5vw, 3.25rem) 0;
}

.page-faq .faq-next__title {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  color: var(--wh-mist);
}

.page-faq .faq-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--wh-line);
  border: 1px solid var(--wh-line);
  border-radius: var(--wh-radius-lg);
  overflow: hidden;
}

.page-faq .faq-next__link {
  display: grid;
  gap: 0.4rem;
  padding: clamp(1rem, 3vw, 1.4rem);
  background: var(--wh-ink-deep);
  text-decoration: none;
  height: 100%;
  transition: background-color 0.24s var(--wh-ease), transform 0.24s var(--wh-ease);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  background: var(--wh-archive);
  transform: translateY(-2px);
}

.page-faq .faq-next__link:focus-visible {
  outline: 2px solid var(--wh-yellow);
  outline-offset: -2px;
}

.page-faq .faq-next__t {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--wh-yellow);
}

.page-faq .faq-next__d {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--wh-gray);
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-totop-wrap {
  display: flex;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-faq {
    --faq-rail: 3.1rem;
    --faq-gap: 0.55rem;
  }

  .page-faq .faq-item__head {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    grid-template-areas:
      "no q"
      "no toggle";
    row-gap: 0.55rem;
  }

  .page-faq .faq-item__no {
    grid-area: no;
  }

  .page-faq .faq-item__q {
    grid-area: q;
  }

  .page-faq .faq-item__head::after {
    grid-area: toggle;
    justify-self: start;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .page-faq .faq-stat__label {
    text-align: left;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    padding: 1.1rem 1.25rem;
  }

  .page-faq .faq-stat__label {
    text-align: left;
  }

  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-stat {
    flex-direction: row;
    align-items: baseline;
    gap: 1rem;
  }

  .page-faq .faq-stat__label {
    text-align: right;
  }

  .page-faq .faq-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__no,
  .page-faq .faq-item__q,
  .page-faq .faq-item__head::after,
  .page-faq .faq-next__link,
  .page-faq .faq-jump .wh-chip {
    transition: none;
  }

  .page-faq .faq-item__head:hover .faq-item__no {
    transform: none;
  }
}