.page-faq {
  --faq-toc-w: 236px;
  --faq-gap: 56px;
  --faq-glass: rgba(18, 64, 42, 0.52);
  --faq-glass-strong: rgba(18, 64, 42, 0.78);
  background: var(--night);
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 104px 0 48px;
  background:
    radial-gradient(120% 92% at 10% 0%, rgba(198, 255, 61, 0.10), transparent 58%),
    radial-gradient(90% 70% at 96% 12%, rgba(255, 138, 43, 0.07), transparent 62%),
    linear-gradient(180deg, var(--night-2) 0%, var(--night) 100%);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), var(--orange) 55%, transparent 90%);
  opacity: 0.5;
}

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

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.4vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
}

.page-faq .faq-facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-facts .num {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.page-faq .faq-facts li > span:last-child {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- 两栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 44px;
  padding-bottom: 88px;
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 左侧目录 ---------- */

.page-faq .faq-toc {
  min-width: 0;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .faq-toc__list > li {
  flex: none;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--rule);
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  background: var(--faq-glass);
  color: var(--muted);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--white);
  background: rgba(18, 64, 42, 0.85);
  border-left-color: var(--lime);
  text-decoration: none;
}

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

.page-faq .faq-toc__icon {
  width: 16px;
  height: 16px;
  flex: none;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 92px;
  padding-bottom: 52px;
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--rule);
  padding-top: 48px;
}

.page-faq .faq-group .section-head {
  margin-bottom: 22px;
}

.page-faq .faq-group .section-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: 0.08em;
}

.page-faq .faq-group .section-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group:target .section-title {
  color: var(--lime);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 26px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--night-2);
  overflow: hidden;
}

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

.page-faq .faq-figure--wide img {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--rule);
}

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

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.03rem;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--white);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-q::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 0.45em;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-item[open] .faq-q::before {
  transform: rotate(-135deg);
}

.page-faq .faq-q:hover {
  color: var(--lime);
}

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

.page-faq .faq-a {
  padding: 0 0 22px 21px;
  max-width: var(--measure);
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-a p {
  margin: 0 0 0.85em;
}

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

.page-faq .faq-a a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--white);
}

.page-faq .faq-note {
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px solid var(--rule);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius);
  background: var(--faq-glass);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  color: var(--white);
}

/* ---------- 结尾面板 ---------- */

.page-faq .faq-cta {
  padding: 26px 22px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--lime);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--faq-glass-strong) 0%, rgba(12, 38, 24, 0.55) 100%);
}

.page-faq .faq-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-faq .faq-cta__text {
  margin: 0 0 0.9em;
  max-width: 64ch;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 132px 0 60px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-top: 60px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 88px;
    align-self: start;
  }

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

  .page-faq .faq-toc__list > li + li {
    margin-top: 4px;
  }

  .page-faq .faq-toc__link {
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius) var(--radius) 0;
    background: transparent;
    white-space: normal;
    line-height: 1.4;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: var(--faq-glass);
  }

  .page-faq .faq-q {
    font-size: 1.08rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q,
  .page-faq .faq-q::before {
    transition: none;
  }
}