.page-faq {
  --faq-rule: rgba(147, 160, 200, .22);
  --faq-pad: clamp(16px, 2.2vw, 26px);
  --faq-cut: 16px;
  display: block;
  padding-bottom: clamp(56px, 9vw, 128px);
  background:
    radial-gradient(880px 520px at 88% -6%, rgba(58, 231, 223, .09), transparent 60%),
    radial-gradient(760px 520px at 4% 30%, rgba(27, 34, 96, .55), transparent 68%);
}

.page-faq .section {
  margin-top: clamp(56px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding-top: clamp(20px, 3vw, 44px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 5.6vw, 4.1rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--frost);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  color: var(--mist);
  font-size: clamp(1rem, 1.25vw, 1.105rem);
  line-height: 1.78;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__figure {
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(27, 34, 96, .58), rgba(6, 10, 28, .25));
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 章节头 ---------- */
.page-faq .faq-head {
  max-width: 64ch;
}

.page-faq .faq-head__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.65rem, 3.4vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--frost);
}

.page-faq .faq-head__text {
  margin: 14px 0 0;
  color: var(--mist);
  line-height: 1.78;
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3vw, 40px);
}

.page-faq .faq-index-card {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px 22px 24px;
  background: linear-gradient(155deg, var(--jewel-indigo), var(--ink-deep));
  border: 1px solid var(--line);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
  transition: transform .2s ease, border-color .2s ease, filter .2s ease;
}

.page-faq .faq-index-card--booking { background: linear-gradient(155deg, var(--jewel-teal), var(--ink-deep)); }
.page-faq .faq-index-card--download { background: linear-gradient(155deg, var(--jewel-wine), var(--ink-deep)); }
.page-faq .faq-index-card--sync { background: linear-gradient(155deg, #232B6E, var(--ink-deep)); }
.page-faq .faq-index-card--records { background: linear-gradient(155deg, #0B4A47, var(--ink-deep)); }

.page-faq .faq-index-card:hover,
.page-faq .faq-index-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--neon-dim);
  filter: brightness(1.08);
}

.page-faq .faq-index-card__no {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-faq .faq-index-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.24rem;
  letter-spacing: -.01em;
  color: var(--frost);
}

.page-faq .faq-index-card__desc {
  font-size: .885rem;
  line-height: 1.68;
  color: var(--mist);
}

.page-faq .faq-index-card__count {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-faq .faq-index-figure {
  margin-top: clamp(26px, 4vw, 52px);
  border: 1px solid var(--line);
}

.page-faq .faq-index-figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 两栏答题区 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(56px, 8vw, 104px);
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-rail__nav {
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__nav a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--mist);
  font-size: .93rem;
  text-decoration: none;
  transition: color .18s ease, padding-left .18s ease;
}

.page-faq .faq-rail__nav a .mono {
  font-family: var(--font-data);
  font-size: .72rem;
  color: var(--gold);
  padding-top: 3px;
  letter-spacing: .06em;
}

.page-faq .faq-rail__nav a:hover,
.page-faq .faq-rail__nav a:focus-visible {
  color: var(--frost);
  padding-left: 4px;
}

.page-faq .faq-rail__nav a[aria-current="true"] {
  color: var(--neon);
}

.page-faq .faq-rail__nav a[aria-current="true"] .mono {
  color: var(--neon);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 58px;
  height: 2px;
  background: var(--neon);
}

.page-faq .faq-group__no {
  font-family: var(--font-data);
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: -.015em;
  color: var(--frost);
}

.page-faq .faq-group__intro {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: .965rem;
  line-height: 1.78;
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  background: rgba(14, 26, 68, .55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(58, 231, 223, .32);
  background: rgba(14, 26, 68, .82);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px var(--faq-pad);
  list-style: none;
  cursor: pointer;
  color: var(--frost);
  font-size: .985rem;
  font-weight: 500;
  line-height: 1.62;
}

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

.page-faq .faq-item__mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 7px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--neon);
  transition: transform .22s ease, opacity .22s ease;
}

.page-faq .faq-item__mark::before { width: 12px; height: 2px; }
.page-faq .faq-item__mark::after { width: 2px; height: 12px; }

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

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

.page-faq .faq-item__a {
  padding: 0 var(--faq-pad) 18px calc(var(--faq-pad) + 26px);
  color: var(--mist);
  font-size: .955rem;
  line-height: 1.8;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity .22s ease, transform .22s ease;
}

.page-faq .faq-item[open] .faq-item__a {
  opacity: 1;
  transform: none;
}

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

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__a a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 兜底联系 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  padding: clamp(26px, 3.6vw, 48px);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--frost);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 56ch;
  color: var(--mist);
  line-height: 1.78;
}

.page-faq .faq-help__meta {
  display: grid;
  gap: 0;
  align-content: start;
  margin: 0;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-help__row dt {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--mist);
  padding-top: 3px;
}

.page-faq .faq-help__row dd {
  margin: 0;
  color: var(--frost);
  font-size: .93rem;
  line-height: 1.62;
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    padding-left: 18px;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-group__title {
    font-size: 2rem;
  }
}