.page-faq {
  --faq-gap: clamp(1.4rem, 4vw, 2.6rem);
  display: block;
}

/* ---------- 首屏：深墨绿黑档案带 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--line-white);
  padding: clamp(1.6rem, 5vw, 2.6rem) 0 clamp(2.2rem, 6vw, 3.6rem);
}

.page-faq .faq-hero__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(247, 249, 244, .055) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(247, 249, 244, .045) 0 1px, transparent 1px 96px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 92%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(1.4rem, 4vw, 2.4rem);
}

.page-faq .breadcrumbs ol,
.page-faq .breadcrumbs li,
.page-faq .breadcrumbs a {
  color: rgba(247, 249, 244, .62);
}

.page-faq .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.4rem);
  align-items: end;
}

.page-faq .faq-hero .eyebrow {
  color: var(--amber);
  margin: 0 0 .7rem;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 5.4vw, 3.15rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 900;
  max-width: 18em;
}

.page-faq .faq-hero__lead {
  margin: clamp(1rem, 3vw, 1.4rem) 0 0;
  max-width: 40em;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.85;
  color: rgba(247, 249, 244, .84);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule-dark);
}

.page-faq .faq-hero__facts li {
  display: grid;
  grid-template-columns: minmax(5.5rem, auto) 1fr;
  gap: .9rem;
  align-items: baseline;
  padding: .85rem 0;
  border-bottom: 1px solid var(--rule-dark);
}

.page-faq .faq-hero__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--cyan);
  letter-spacing: .01em;
}

.page-faq .faq-hero__label {
  font-size: .875rem;
  line-height: 1.6;
  color: rgba(247, 249, 244, .68);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(2rem, 5vw, 3.4rem);
  padding-bottom: clamp(2.6rem, 7vw, 5rem);
}

/* 主题索引 */
.page-faq .faq-index__title {
  margin: 0 0 .8rem;
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 .35rem;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  flex: 0 0 auto;
  padding: .5rem .75rem;
  border: 1px solid var(--rule-strong);
  color: var(--ink-900);
  text-decoration: none;
  font-size: .875rem;
  white-space: nowrap;
  transition: background var(--t), border-color var(--t), color var(--t);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  font-size: .8rem;
}

.page-faq .faq-index__link:hover {
  border-color: var(--ink-900);
  background: rgba(230, 223, 206, .6);
}

.page-faq .faq-index__link[data-active] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--line-white);
}

.page-faq .faq-index__link[data-active] .faq-index__num {
  color: var(--cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(2.2rem, 5vw, 3.4rem);
  scroll-margin-top: calc(var(--nav-h) + 1.6rem);
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: .9rem;
  row-gap: .3rem;
  align-items: baseline;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--rule-strong);
  margin-bottom: .2rem;
}

.page-faq .faq-group__idx {
  grid-row: 1;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -.01em;
}

.page-faq .faq-group__head h2 {
  grid-row: 1;
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--ink-900);
}

.page-faq .faq-group__note {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 44ch;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .8rem;
  align-items: baseline;
  padding: .95rem .85rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink-900);
  transition: background var(--t);
}

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

.page-faq .faq-item__q:hover {
  background: rgba(230, 223, 206, .55);
}

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

.page-faq .faq-item__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
  font-weight: 400;
  color: var(--muted);
  padding-top: .15em;
}

.page-faq .faq-item__sign {
  position: relative;
  width: 12px;
  height: 12px;
  align-self: center;
  flex: none;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 1.5px;
  background: var(--ink-800);
  transform: translateY(-50%);
}

.page-faq .faq-item__sign::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform var(--t);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-item[open] > .faq-item__q {
  background: var(--paper-dim);
  box-shadow: inset 3px 0 0 0 var(--amber);
}

.page-faq .faq-item__a {
  background: var(--paper-dim);
  padding: .1rem 1rem 1.1rem 2.6rem;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 34em;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-900);
}

.page-faq .faq-item__a a {
  color: var(--ink-800);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: .25em;
}

.page-faq .faq-item__a a:hover {
  color: #0d2b22;
  text-decoration-color: var(--ink-800);
}

.page-faq .faq-mono {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: .95em;
}

/* ---------- 图形 ---------- */
.page-faq .faq-figure {
  margin: 1.4rem 0 .4rem;
}

.page-faq .faq-figure__frame {
  background: var(--ink-800);
  border: 1px solid var(--rule-strong);
  aspect-ratio: 1000 / 640;
  overflow: hidden;
}

.page-faq .faq-figure__frame--thirds {
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-figure__caption {
  margin-top: .65rem;
  padding-left: .7rem;
  border-left: 2px solid var(--amber);
  font-size: .84rem;
  line-height: 1.65;
  color: var(--muted);
  max-width: 44ch;
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
  background: var(--ink-900);
  color: var(--line-white);
  padding: clamp(1.5rem, 5vw, 2.6rem);
  border: 1px solid var(--ink-900);
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 .7rem;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-help h2 {
  margin: 0;
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -.015em;
  font-weight: 900;
}

.page-faq .faq-help__main p {
  margin: .9rem 0 1.4rem;
  max-width: 38em;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(247, 249, 244, .8);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule-dark);
}

.page-faq .faq-help__list li {
  display: grid;
  gap: .25rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--rule-dark);
}

.page-faq .faq-help__key {
  font-size: .72rem;
  letter-spacing: .18em;
  color: rgba(247, 249, 244, .55);
}

.page-faq .faq-help__val {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: .95rem;
  line-height: 1.6;
  color: var(--line-white);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-help {
    grid-template-columns: 1.35fr 1fr;
    align-items: start;
  }

  .page-faq .faq-item__q {
    padding: 1.05rem 1rem;
  }

  .page-faq .faq-item__a {
    padding: .1rem 1.4rem 1.35rem 3.1rem;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.45fr 1fr;
    column-gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-body {
    grid-template-columns: 224px minmax(0, 1fr);
    column-gap: clamp(2.2rem, 5vw, 3.6rem);
  }

  .page-faq .faq-index {
    align-self: start;
    position: sticky;
    top: calc(var(--nav-h) + 1.5rem);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    display: grid;
    grid-template-columns: 1.6rem 1fr;
    gap: .6rem;
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-group__head {
    column-gap: 1.1rem;
  }

  .page-faq .faq-group {
    scroll-margin-top: calc(var(--nav-h) + 2.2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}