.page-faq {
  --faq-panel-bg: rgba(16, 42, 71, .72);
  --faq-body-text: #C4D3E1;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(6px, 1.6vw, 18px);
}

/* ---------- 封面区 ---------- */
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: end;
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

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

.page-faq .faq-kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-faq h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 5.8vw, 72px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--c-ice);
}

.page-faq .faq-lede {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: #B9C9DA;
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: rgba(16, 42, 71, .6);
}

.page-faq .faq-quick__k {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.1;
  color: var(--c-signal);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-quick__v {
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-graphite);
}

.page-faq .faq-hero__art {
  margin: 0;
  min-width: 0;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 46px);
}

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

.page-faq .faq-rail {
  order: -1;
  min-width: 0;
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 216px;
  }
  .page-faq .faq-rail {
    order: 0;
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

/* ---------- 右侧/顶部刻度导航 ---------- */
.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-graphite);
}

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

@media (min-width: 1040px) {
  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .faq-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 12px;
  border-left: 2px solid var(--line-soft);
  color: var(--c-graphite);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  background: rgba(53, 230, 210, .07);
}

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

/* ---------- 分组手风琴 ---------- */
.page-faq .faq-group {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__sum {
  display: flex;
  gap: 18px;
  align-items: baseline;
  padding: 26px 4px;
  cursor: pointer;
  list-style: none;
  transition: background .2s var(--ease);
}

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

.page-faq .faq-group__sum:hover,
.page-faq .faq-group__sum:focus-visible {
  background: rgba(16, 42, 71, .5);
}

.page-faq .faq-group__num {
  flex: none;
  min-width: 2.4em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__name {
  flex: 1;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.5vw, 27px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--c-ice);
  transition: color .2s var(--ease);
}

.page-faq .faq-group__sum:hover .faq-group__name {
  color: var(--c-cyan);
}

.page-faq .faq-group__sign {
  position: relative;
  flex: none;
  align-self: center;
  width: 16px;
  height: 16px;
}

.page-faq .faq-group__sign::before,
.page-faq .faq-group__sign::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-faq .faq-group__sign::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .faq-group__sign::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  transition: transform .28s var(--ease);
}

.page-faq .faq-group__d[open] .faq-group__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-group__panel {
  padding: 0 0 clamp(22px, 3vw, 36px) clamp(0px, 3vw, 56px);
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-qa {
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--faq-panel-bg);
  border-left: 2px solid var(--c-cyan);
  box-shadow: 0 1px 0 rgba(46, 111, 183, .22);
}

.page-faq .faq-qa h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ice);
}

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

.page-faq .faq-qa a {
  color: var(--c-cyan);
}

.page-faq .faq-qa__fig {
  margin: 18px 0 16px;
}

/* ---------- 尾部行动区 ---------- */
.page-faq .faq-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(16, 42, 71, .96) 0%, rgba(8, 24, 44, .55) 68%),
    var(--c-deep-2);
}

@media (min-width: 780px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--c-ice);
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: #B9C9DA;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-group__sign::after,
  .page-faq .faq-group__name,
  .page-faq .faq-rail__list a,
  .page-faq .faq-group__sum {
    transition: none;
  }
}