.page-faq {
  --faq-rail: 224px;
  overflow-wrap: break-word;
}

/* ── 首屏 ───────────────────────────── */
.page-faq .faq-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(26px, 4vw, 50px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: clamp(16px, 2vw, 24px) 0 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-ink-soft);
  font-size: 14px;
  color: var(--slate);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--indigo);
}

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

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-ink);
  background: var(--mist);
}

.page-faq .faq-hero__fig figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ── 主体双栏 ───────────────────────── */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

/* ── 分组索引条 ─────────────────────── */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-faq .faq-rail__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-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--line-ink);
  border-radius: 999px;
  background: var(--card);
  color: var(--indigo);
  text-decoration: none;
  white-space: nowrap;
  font-size: 14px;
  line-height: 1.2;
  transition: border-color .18s ease, background-color .18s ease, color .18s ease;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  letter-spacing: .04em;
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
}

.page-faq .faq-rail__link[aria-current="true"],
.page-faq .faq-rail__link[aria-current="location"] {
  border-color: var(--brick);
  background: var(--brick-soft);
  color: var(--brick);
}

.page-faq .faq-rail__link[aria-current="true"] .faq-rail__num,
.page-faq .faq-rail__link[aria-current="location"] .faq-rail__num {
  color: var(--brick);
}

/* ── 分组 ───────────────────────────── */
.page-faq .faq-group {
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line-ink-soft);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__head {
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-group__tag {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.page-faq .faq-group__code {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--brick);
}

.page-faq .faq-group__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-faq .faq-group__head .sb-h2 {
  margin: 0 0 8px;
}

.page-faq .faq-group__head > p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ── 手机端提示卡 ───────────────────── */
.page-faq .faq-mobile {
  display: grid;
  gap: 16px;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  padding: 16px;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  background: var(--card);
}

.page-faq .faq-mobile__text p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-mobile__text p:last-child {
  margin-bottom: 0;
  color: var(--slate);
}

.page-faq .faq-mobile__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 7 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line-ink-soft);
  background: var(--mist);
}

/* ── 问答条目 ───────────────────────── */
.page-faq .faq-items {
  border-top: 1px solid var(--line-ink-soft);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-ink-soft);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  transition: color .18s ease;
}

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

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

.page-faq .faq-item__q:hover .faq-item__text {
  color: var(--brick);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--copper);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border: 1px solid var(--line-ink);
  border-radius: 50%;
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--indigo);
  border-radius: 1px;
  transition: opacity .2s ease, background-color .2s ease;
}

.page-faq .faq-item__icon::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__icon {
  border-color: var(--brick);
  background: var(--brick-soft);
}

.page-faq .faq-item[open] .faq-item__icon::before {
  background: var(--brick);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 0 18px 32px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-kpi {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--mist);
  font-family: var(--font-mono);
  font-size: .93em;
  letter-spacing: .02em;
  color: var(--indigo);
}

/* ── 分组尾链 ───────────────────────── */
.page-faq .faq-group__link {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-gold);
}

.page-faq .faq-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--brick);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .faq-more:hover {
  color: var(--indigo);
  border-bottom-color: var(--copper);
}

/* ── 断点 ───────────────────────────── */
@media (min-width: 640px) {
  .page-faq .faq-mobile {
    grid-template-columns: minmax(0, 1fr) 180px;
    align-items: center;
  }
}

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

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-rail__title {
    margin-bottom: 14px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 11px 8px 11px 14px;
    border: 0;
    border-left: 2px solid var(--line-ink);
    border-radius: 0;
    background: transparent;
    white-space: normal;
    font-size: 15px;
    line-height: 1.5;
  }

  .page-faq .faq-rail__link:hover {
    color: var(--brick);
    border-left-color: var(--copper);
  }

  .page-faq .faq-rail__link[aria-current="true"],
  .page-faq .faq-rail__link[aria-current="location"] {
    background: transparent;
    border-left-color: var(--brick);
    color: var(--brick);
  }

  .page-faq .faq-rail__name {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-faq .faq-item__q {
    padding: 17px 0;
  }

  .page-faq .faq-item__a {
    padding-left: 34px;
  }

  .page-faq .faq-mobile {
    grid-template-columns: minmax(0, 1fr) 200px;
    padding: 20px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
  }
}