.page-faq {
  --faq-nav-w: 220px;
  --faq-card-bg: rgba(27, 42, 74, .55);
  --faq-card-bg-open: rgba(27, 42, 74, .9);
  display: block;
}

.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 40px;
  background:
    radial-gradient(120% 90% at 12% -10%, rgba(46, 26, 71, .85) 0%, rgba(10, 17, 40, 0) 62%),
    radial-gradient(90% 70% at 100% 0%, rgba(0, 229, 255, .12) 0%, rgba(10, 17, 40, 0) 58%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: end;
}

.page-faq .faq-hero__intro {
  max-width: 46ch;
}

.page-faq .faq-hero__intro h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 6vw, 46px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 10px 0 16px;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 22px;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-hero__stats .num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__stats li span:last-child {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-hero__fig {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

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

/* ---- 主体：锚点侧栏 + 问题列表 ---- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: 34px;
  padding-bottom: 60px;
}

.page-faq .faq-nav__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-nav__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: border-color .3s var(--ease), color .3s var(--ease), background-color .3s var(--ease);
}

.page-faq .faq-nav__list a:hover,
.page-faq .faq-nav__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 255, .07);
}

.page-faq .faq-nav__list .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-nav__hint {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-left: 2px solid var(--orange);
  padding-left: 12px;
  max-width: 30ch;
}

.page-faq .faq-groups {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-group h2 {
  font-family: var(--font-head);
  font-size: clamp(21px, 3.4vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 6px 0 10px;
  color: var(--text);
}

.page-faq .faq-group__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 58ch;
}

.page-faq .qa-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .qa-item {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, var(--faq-card-bg) 0%, rgba(27, 42, 74, 0) 78%);
  transition: background-color .3s var(--ease);
}

.page-faq .qa-item[open] {
  background: linear-gradient(90deg, var(--faq-card-bg-open) 0%, rgba(27, 42, 74, .25) 100%);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 18px 18px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
}

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

.page-faq .qa-q::marker {
  content: "";
}

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

.page-faq .qa-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  flex: none;
}

.page-faq .qa-text {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  transition: color .25s var(--ease);
}

.page-faq .qa-caret {
  flex: none;
  width: 9px;
  height: 9px;
  margin-left: auto;
  margin-top: 6px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .qa-item[open] .qa-caret {
  transform: rotate(225deg);
  border-color: var(--cyan);
}

.page-faq .qa-a {
  padding: 0 44px 22px 46px;
  animation: faqFade .32s var(--ease) both;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #c3d3e8;
}

.page-faq .qa-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .4);
}

.page-faq .qa-a a:hover {
  border-bottom-color: var(--cyan);
}

@keyframes faqFade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-group__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 20px;
}

.page-faq .faq-group__split .qa-list {
  margin-top: 0;
}

.page-faq .faq-feedback__fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(46, 26, 71, .45);
}

.page-faq .faq-feedback__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-feedback__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-faq .faq-cta {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(46, 26, 71, .9) 0%, rgba(27, 42, 74, .5) 60%),
    var(--midnight);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-cta__inner {
  padding: 26px 22px;
}

.page-faq .faq-cta h2 {
  font-family: var(--font-head);
  font-size: clamp(19px, 3vw, 24px);
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--text);
}

.page-faq .faq-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 52ch;
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 34px 0 52px;
  }

  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
    gap: 30px;
  }

  .page-faq .faq-cta__inner {
    padding: 32px 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 44px;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
    align-self: start;
  }

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

  .page-faq .faq-nav__list a {
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 11px 0 11px 14px;
    font-size: 15px;
  }

  .page-faq .faq-nav__list a:hover,
  .page-faq .faq-nav__list a:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
  }

  .page-faq .qa-q {
    padding: 20px 22px 20px 18px;
  }

  .page-faq .qa-a {
    padding: 0 60px 24px 50px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-caret,
  .page-faq .qa-text,
  .page-faq .qa-item,
  .page-faq .faq-nav__list a {
    transition: none;
  }

  .page-faq .qa-a {
    animation: none;
  }
}