.page-faq {
  --faq-rail: 216px;
  --faq-gap: 56px;
  background: var(--cream);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(14px, 3vw, 24px);
}

/* ---------- 报头 ---------- */
.page-faq .faq-head {
  padding: clamp(26px, 5vw, 52px) 0 clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-head-label {
  margin: 0 0 16px;
  color: var(--ochre);
}

.page-faq .faq-title {
  margin: 0;
  max-width: 18em;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-display);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px 16px;
  background: var(--cream);
}

.page-faq .faq-fact-num {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-fact-label {
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding: clamp(34px, 6vw, 64px) 0 clamp(48px, 8vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-faq .faq-index-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-item {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: .875rem;
  line-height: 1.35;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-index-link:hover {
  border-color: var(--gold);
}

.page-faq .faq-index-link[aria-current="true"] {
  border-color: var(--gold);
  background: var(--cream-deep);
}

.page-faq .faq-index-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

/* ---------- 主题 ---------- */
.page-faq .faq-topic {
  margin-bottom: clamp(40px, 6vw, 68px);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-topic:last-child {
  margin-bottom: 0;
}

.page-faq .faq-topic-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-topic-num {
  flex: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-topic-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.25rem, 1.05rem + 1.1vw, 1.75rem);
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .faq-topic-sum {
  margin: 14px 0 24px;
  max-width: 36em;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 30px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--cream-deep);
}

.page-faq .faq-figure .figure-caption {
  margin-top: 10px;
}

.page-faq .faq-diagram {
  margin: 0 0 30px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  background: var(--cream);
}

.page-faq .faq-diagram svg {
  display: block;
  width: 100%;
  min-width: 300px;
  height: auto;
}

.page-faq .faq-diagram .figure-caption {
  padding: 10px 14px 12px;
  margin: 0;
  border-top: 1px solid var(--line);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-q-num {
  padding-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ochre);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q-text {
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color .22s var(--ease);
}

.page-faq .faq-q:hover .faq-q-text,
.page-faq .faq-q:focus-visible .faq-q-text {
  text-decoration-color: var(--gold);
}

.page-faq .faq-q-mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 8px;
  flex: none;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-q-mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}

.page-faq .faq-q-mark::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 30px 22px 30px;
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a-sample {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-a-sample-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-closing {
  padding: clamp(44px, 7vw, 80px) 0;
  background: var(--indigo-deep);
  color: var(--inverse);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-closing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-faq .faq-closing-label {
  margin: 0 0 14px;
  color: var(--gold-light);
}

.page-faq .faq-closing-title {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: var(--fs-h2);
  line-height: 1.3;
  color: var(--inverse);
}

.page-faq .faq-closing-text {
  margin: 0;
  max-width: 32em;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--inverse-soft);
}

.page-faq .faq-channels {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-channel {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--inverse-line);
}

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

.page-faq .faq-channel-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-light);
}

.page-faq .faq-channel-value {
  font-family: var(--mono);
  font-size: 1.0625rem;
  letter-spacing: .02em;
  color: var(--inverse);
  overflow-wrap: anywhere;
}

.page-faq .faq-channel-note {
  margin: 0;
  font-size: .875rem;
  line-height: 1.65;
  color: var(--inverse-soft);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-item {
    display: block;
  }

  .page-faq .faq-index-link {
    display: flex;
    width: 100%;
    padding: 11px 0 11px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    background: transparent;
    white-space: normal;
    transition: border-color .22s var(--ease), color .22s var(--ease);
  }

  .page-faq .faq-index-link:hover {
    border-left-color: var(--gold-light);
  }

  .page-faq .faq-index-link[aria-current="true"] {
    border-left-color: var(--gold);
    background: transparent;
    color: var(--ink);
  }

  .page-faq .faq-figure {
    max-width: 80%;
  }

  .page-faq .faq-closing-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-a {
    padding-right: 15%;
  }
}

@media (min-width: 1160px) {
  .page-faq .faq-figure {
    max-width: 68%;
  }
}

/* ---------- 附件动作 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .faq-q-text,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after {
    transition: none;
  }
}
</main>