.page-faq {
  position: relative;
  padding-bottom: 72px;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 面包屑 */
.page-faq .faq-crumbs {
  padding: 22px 0 6px;
}

.page-faq .faq-crumbs .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* 首屏 */
.page-faq .faq-intro {
  padding: 16px 0 36px;
}

.page-faq .faq-intro__grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-faq .faq-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-intro h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 5.4vw, 2.85rem);
  font-weight: 700;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(19, 28, 48, 0.6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .faq-jump a em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: var(--glass);
}

.page-faq .faq-intro__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .faq-intro__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 问答分组 */
.page-faq .faq-block {
  padding: 36px 0 4px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-block__head {
  display: grid;
  gap: 8px;
  padding-top: 18px;
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__coord {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 3.6vw, 1.75rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-block__hint {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

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

/* 折叠问答 */
.page-faq .qa {
  border: 1px solid var(--line);
  border-left-width: 2px;
  border-radius: var(--radius);
  background: rgba(19, 28, 48, 0.62);
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .qa:hover {
  border-color: #2a3d61;
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  background: var(--ink-800);
}

.page-faq .qa__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__idx {
  flex: none;
  min-width: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .qa__title {
  flex: 1 1 auto;
  font-size: 0.975rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform 0.22s ease, background-color 0.22s ease, opacity 0.22s ease;
}

.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__sign::before {
  background: var(--cyan);
}

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

.page-faq .qa__body {
  padding: 0 16px 18px 16px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa__body p {
  margin: 0 0 10px;
}

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

.page-faq .qa__body strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .qa__path {
  display: inline-block;
  padding: 1px 7px;
  border: 1px solid rgba(24, 224, 255, 0.35);
  border-radius: var(--radius);
  background: rgba(24, 224, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--cyan);
  white-space: nowrap;
}

/* 大屏版说明配图 */
.page-faq .faq-figure {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 章节横向滚动带 */
.page-faq .bs-hint {
  margin: 26px 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .bs-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(78%, 300px);
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 18px;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
}

.page-faq .bs-rail::-webkit-scrollbar {
  height: 6px;
}

.page-faq .bs-rail::-webkit-scrollbar-track {
  background: var(--ink-800);
}

.page-faq .bs-rail::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

.page-faq .bs-card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 170px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-top: 2px solid rgba(24, 224, 255, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 224, 255, 0.07) 0%, rgba(19, 28, 48, 0.78) 58%);
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-faq .bs-card:hover {
  border-color: var(--cyan);
}

.page-faq .bs-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .bs-card__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .bs-card__note {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 结尾 */
.page-faq .faq-cta {
  margin-top: 52px;
  padding: 36px 0 8px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(24, 224, 255, 0.05) 0%, rgba(7, 11, 20, 0) 70%);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-faq .faq-cta h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 3.4vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-cta__copy p {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-cta__copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(24, 224, 255, 0.4);
  transition: border-color 0.22s ease, color 0.22s ease;
}

.page-faq .faq-cta__copy a:hover,
.page-faq .faq-cta__copy a:focus-visible {
  color: var(--lava);
  border-bottom-color: var(--lava);
}

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

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .qa__body {
    padding-left: 54px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-intro {
    padding: 34px 0 58px;
  }

  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 52px;
  }

  .page-faq .faq-block {
    padding-top: 46px;
  }

  .page-faq .faq-block__head {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    column-gap: 32px;
    align-items: baseline;
  }

  .page-faq .faq-block__coord {
    grid-column: 1;
  }

  .page-faq .faq-block__head h2 {
    grid-column: 1;
  }

  .page-faq .faq-block__hint {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
  }

  .page-faq .bs-rail {
    grid-auto-columns: 300px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
    align-items: center;
  }

  .page-faq .faq-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}