.page-faq {
  --faq-line: rgba(139, 147, 176, .28);
  --faq-soft: rgba(139, 147, 176, .12);
  --faq-num-w: 2.2rem;
  overflow-x: hidden;
}

.page-faq .xb-breadcrumb {
  padding-top: calc(var(--xb-header-h) + 20px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 28px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--xb-cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--xb-font-head);
  font-size: clamp(1.9rem, 6.6vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--xb-paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 46ch;
  color: var(--xb-mist);
  line-height: 1.85;
}

.page-faq .faq-hero__side {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-kpi {
  background: var(--xb-navy);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-kpi .xb-kpi__value {
  font-family: var(--xb-font-mono);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--xb-paper);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-kpi__unit {
  font-size: .72rem;
  color: var(--xb-mist);
  margin-left: 4px;
  letter-spacing: .06em;
}

.page-faq .faq-kpi .xb-kpi__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--xb-mist);
}

.page-faq .faq-hero__figure {
  margin: 32px 0 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  filter: saturate(.55) brightness(.78);
}

/* ---------- 分类标签带 ---------- */
.page-faq .faq-cats {
  padding-top: 34px;
  padding-bottom: 8px;
}

.page-faq .faq-cats__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--xb-mist);
  text-transform: uppercase;
}

.page-faq .faq-cats__list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--xb-steel) transparent;
}

.page-faq .faq-cats__list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-cats__list::-webkit-scrollbar-thumb {
  background: var(--xb-steel);
}

.page-faq .faq-cats__link {
  display: inline-block;
  white-space: nowrap;
  padding: 10px 16px 9px;
  border: 1px solid var(--faq-line);
  border-bottom: 2px solid transparent;
  background: var(--xb-navy);
  color: var(--xb-paper);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .25s var(--xb-ease), color .25s var(--xb-ease), background-color .25s var(--xb-ease);
}

.page-faq .faq-cats__link:hover,
.page-faq .faq-cats__link:focus-visible {
  border-color: var(--xb-amber);
  border-bottom-color: var(--xb-amber);
  background: var(--xb-indigo);
  color: var(--xb-amber);
  outline: none;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 40px;
  padding-top: 24px;
  padding-bottom: 8px;
}

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

/* ---------- 分类区块 ---------- */
.page-faq .faq-group {
  padding: 34px 0 8px;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--xb-header-h) + 20px);
}

.page-faq .faq-group:first-child {
  border-top: none;
  padding-top: 8px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: var(--faq-num-w) 1fr;
  column-gap: 12px;
  align-items: baseline;
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  font-family: var(--xb-font-mono);
  font-size: .95rem;
  color: var(--xb-amber);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--xb-font-head);
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  line-height: 1.2;
  color: var(--xb-paper);
  letter-spacing: -.005em;
}

.page-faq .faq-group__scope {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--xb-mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--faq-line);
  background: transparent;
}

.page-faq .faq-q summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 28px 16px 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  color: var(--xb-paper);
  transition: color .25s var(--xb-ease);
}

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

.page-faq .faq-q summary:hover,
.page-faq .faq-q summary:focus-visible {
  color: var(--xb-amber);
  outline: none;
}

.page-faq .faq-q__idx {
  font-family: var(--xb-font-mono);
  font-size: .82rem;
  color: var(--xb-mist);
  font-variant-numeric: tabular-nums;
  flex: 0 0 auto;
  transition: color .25s var(--xb-ease);
}

.page-faq .faq-q[open] .faq-q__idx {
  color: var(--xb-cyan);
}

.page-faq .faq-q__title {
  flex: 1 1 auto;
  font-size: 1rem;
  line-height: 1.6;
}

.page-faq .faq-q__sign {
  position: absolute;
  right: 2px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-right: 1px solid var(--xb-mist);
  border-bottom: 1px solid var(--xb-mist);
  transform: rotate(45deg);
  transition: transform .3s var(--xb-ease), border-color .25s var(--xb-ease);
}

.page-faq .faq-q[open] .faq-q__sign {
  transform: rotate(225deg);
  border-color: var(--xb-cyan);
}

.page-faq .faq-q__body {
  padding: 0 0 20px calc(var(--faq-num-w) + 12px);
  margin: 0;
  border-left: 1px solid var(--xb-steel);
  padding-left: calc(var(--faq-num-w) + 12px);
}

.page-faq .faq-q__body p {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--xb-mist);
}

.page-faq .faq-q__body a,
.page-faq .faq-help__more a,
.page-faq .faq-closing a {
  color: var(--xb-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 192, .4);
}

.page-faq .faq-q__body a:hover,
.page-faq .faq-help__more a:hover,
.page-faq .faq-closing a:hover {
  color: var(--xb-amber);
  border-bottom-color: var(--xb-amber);
}

.page-faq .faq-val {
  font-family: var(--xb-font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--xb-paper);
  background: var(--faq-soft);
  padding: 1px 6px;
  border-bottom: 1px solid rgba(47, 224, 192, .35);
}

.page-faq .xb-badge {
  display: inline-block;
  margin: 0 2px;
  padding: 0 5px;
  font-size: .78rem;
  line-height: 1.5;
  border: 1px solid currentColor;
}

/* ---------- 导出区块双列 ---------- */
.page-faq .faq-export {
  display: grid;
  gap: 26px;
}

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

.page-faq .faq-export__side {
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.page-faq .faq-export__figure {
  margin: 0 0 14px;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-export__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(.5) brightness(.72);
}

.page-faq .faq-export__hint {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--xb-mist);
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-body__rail {
  min-width: 0;
}

.page-faq .faq-help {
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--xb-amber);
  background: var(--xb-navy);
  padding: 22px 20px;
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--xb-amber);
  text-transform: uppercase;
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--xb-font-head);
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--xb-paper);
}

.page-faq .faq-help__text {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--xb-mist);
}

.page-faq .faq-help__btn {
  display: block;
  text-align: center;
  text-decoration: none;
}

.page-faq .faq-help__more {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--xb-mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-closing {
  margin-top: 20px;
  border-top: 1px solid var(--faq-line);
  background: linear-gradient(180deg, rgba(20, 28, 63, 0) 0%, rgba(20, 28, 63, .9) 100%);
}

.page-faq .faq-closing__inner {
  display: grid;
  gap: 24px;
  padding-top: 40px;
  padding-bottom: 52px;
}

.page-faq .faq-closing__title {
  margin: 0 0 14px;
  font-family: var(--xb-font-head);
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  line-height: 1.25;
  color: var(--xb-paper);
}

.page-faq .faq-closing__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--xb-mist);
}

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

.page-faq .faq-closing__actions .xb-btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

  .page-faq .faq-hero__side {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-kpi {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
  }

  .page-faq .faq-kpi .xb-kpi__label {
    text-align: right;
    max-width: 15ch;
  }

  .page-faq .faq-q__title {
    font-size: 1.05rem;
  }

  .page-faq .faq-closing__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

  .page-faq .faq-closing__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-body__rail {
    position: sticky;
    top: calc(var(--xb-header-h) + 24px);
  }

  .page-faq .faq-export {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 40px;
  }

  .page-faq .faq-export__side {
    border-top: none;
    padding-top: 0;
  }

  .page-faq .faq-group {
    padding-top: 44px;
  }

  .page-faq .faq-group__head {
    column-gap: 18px;
  }

  .page-faq .faq-q summary {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .page-faq .faq-q__body {
    padding-bottom: 24px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero h1 {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__sign,
  .page-faq .faq-q__idx,
  .page-faq .faq-cats__link {
    transition: none;
  }
}