.page-faq {
  --faq-rule: rgba(26, 21, 18, .16);
  --faq-rule-soft: rgba(26, 21, 18, .09);
  --faq-dim: rgba(26, 21, 18, .64);
  --faq-dim-dark: rgba(243, 235, 221, .68);
  --faq-rule-dark: rgba(243, 235, 221, .16);
  background: var(--c-night);
  color: var(--c-cream);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(34px, 6vw, 72px)) 0 clamp(44px, 6vw, 84px);
  background-color: var(--c-night);
  background-image:
    repeating-linear-gradient(90deg, rgba(58, 74, 70, .5) 0 1px, transparent 1px 132px);
  border-bottom: 1px solid var(--c-grid);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 36px);
  margin-top: clamp(26px, 5vw, 50px);
}

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

.page-faq .faq-hero__lead .label {
  color: var(--c-signal-soft);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  color: var(--c-score);
  overflow-wrap: break-word;
}

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

.page-faq .faq-hero__note p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-silver);
  max-width: 46ch;
}

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

.page-faq .faq-banner {
  margin: clamp(30px, 5vw, 62px) 0 0;
}

.page-faq .faq-banner__frame {
  position: relative;
  aspect-ratio: 8 / 5;
  width: 100%;
  overflow: hidden;
}

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

.page-faq .faq-banner__cap {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-silver);
  max-width: 58ch;
}

/* ---------- 纸面问答区 ---------- */

.page-faq .faq-body {
  background: var(--c-cream);
  color: var(--c-lead);
  padding: clamp(46px, 7vw, 96px) 0;
}

.page-faq .faq-body__title {
  margin: 0 0 clamp(22px, 4vw, 40px);
  padding-bottom: clamp(14px, 2vw, 20px);
  border-bottom: 1px solid var(--faq-rule);
  font-size: clamp(19px, 2.3vw, 27px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .01em;
}

.page-faq .faq-entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: clamp(26px, 4vw, 44px) 0;
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-entry__no {
  display: block;
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .14em;
  color: var(--faq-dim);
  margin-bottom: 8px;
}

.page-faq .faq-entry__q {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: .01em;
  color: var(--c-lead);
}

.page-faq .faq-entry__tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--faq-rule);
  color: var(--faq-dim);
  background: transparent;
}

.page-faq .faq-entry__body {
  min-width: 0;
  padding-left: 16px;
  box-shadow: inset 2px 0 0 transparent;
  transition: box-shadow var(--t-base) var(--ease), background-color var(--t-base) var(--ease);
}

.page-faq .faq-entry__body > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  max-width: 36em;
  overflow-wrap: break-word;
}

.page-faq .faq-list {
  list-style: none;
  margin: 0 0 6px;
  padding: 0;
}

.page-faq .faq-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.82;
  max-width: 36em;
  overflow-wrap: break-word;
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 10px;
  height: 1px;
  background: var(--faq-dim);
}

.page-faq .faq-list--signal li::before {
  background: var(--c-signal);
  width: 12px;
}

.page-faq .faq-entry--anchor .faq-entry__no {
  color: var(--c-signal);
}

.page-faq .faq-entry--archive .faq-entry__no {
  color: var(--c-silver);
}

.page-faq .faq-entry--archive .faq-entry__q {
  color: #3d4a47;
}

.page-faq .faq-inline-link {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.82;
  max-width: 36em;
}

.page-faq .faq-inline-link a {
  color: var(--c-line);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-inline-link a:hover,
.page-faq .faq-inline-link a:focus-visible {
  color: var(--c-signal);
  border-bottom-color: var(--c-signal);
}

/* ---------- 条目内配图 ---------- */

.page-faq .faq-inline {
  margin: 22px 0 4px;
  max-width: 36em;
}

.page-faq .faq-inline__frame {
  position: relative;
  aspect-ratio: 4 / 3;
  width: 100%;
  overflow: hidden;
}

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

.page-faq .faq-inline figcaption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 分母示意 SVG ---------- */

.page-faq .faq-denom-wrap {
  margin: 22px 0 6px;
  max-width: 36em;
}

.page-faq .faq-denom {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  color: var(--faq-dim);
}

.page-faq .faq-denom__ticks {
  color: var(--c-line);
}

.page-faq .faq-denom__bracket,
.page-faq .faq-denom__rail {
  stroke: var(--faq-rule);
  stroke-width: 1;
  fill: none;
}

.page-faq .faq-denom__unit {
  fill: var(--c-signal);
  stroke: none;
}

.page-faq .faq-denom-wrap figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 尾部反馈区 ---------- */

.page-faq .faq-tail {
  background: var(--c-night);
  color: var(--c-cream);
  border-top: 1px solid var(--c-grid);
  padding: clamp(46px, 7vw, 92px) 0 clamp(50px, 7vw, 88px);
}

.page-faq .faq-tail__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 40px);
}

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

.page-faq .faq-tail__lead .label {
  color: var(--c-signal-soft);
}

.page-faq .faq-tail__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--c-cream);
  max-width: 14em;
}

.page-faq .faq-tail__body {
  min-width: 0;
  border-left: 2px solid var(--c-signal);
  padding-left: 18px;
}

.page-faq .faq-tail__body > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-dim-dark);
  max-width: 38em;
}

.page-faq .faq-list--dark li {
  color: var(--c-cream);
  max-width: 38em;
}

.page-faq .faq-list--dark li::before {
  background: var(--c-silver);
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 追问折叠 ---------- */

.page-faq .faq-extra {
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--c-grid);
}

.page-faq .faq-extra__title {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-silver);
}

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

.page-faq .faq-details:last-child {
  border-bottom: 1px solid var(--faq-rule-dark);
}

.page-faq .faq-details summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 26px 16px 0;
  position: relative;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-cream);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .faq-details summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 16px;
  color: var(--c-signal-soft);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-details[open] summary::after {
  content: "–";
}

.page-faq .faq-details summary:hover,
.page-faq .faq-details summary:focus-visible {
  color: var(--c-signal-soft);
}

.page-faq .faq-details p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--faq-dim-dark);
  max-width: 52em;
}

.page-faq .faq-details p a {
  color: var(--c-signal-soft);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-details p a:hover,
.page-faq .faq-details p a:focus-visible {
  color: var(--c-cream);
}

/* ---------- 桌面排版 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-faq .faq-entry {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-entry__index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-tail__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-faq .faq-extra {
    max-width: 88%;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-faq .faq-entry__index:hover ~ .faq-entry__body,
  .page-faq .faq-entry__index:focus-within ~ .faq-entry__body {
    box-shadow: inset 3px 0 0 var(--c-line);
    background-color: rgba(31, 92, 66, .05);
  }

  .page-faq .faq-entry--anchor .faq-entry__index:hover ~ .faq-entry__body {
    box-shadow: inset 3px 0 0 var(--c-signal);
  }

  .page-faq .faq-banner__frame img {
    transition: filter var(--t-base) var(--ease), opacity var(--t-base) var(--ease);
  }

  .page-faq .faq-banner:hover .faq-banner__frame img {
    filter: saturate(1.05) brightness(1.06);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-entry__body {
    padding-left: 13px;
  }

  .page-faq .faq-tail__body {
    padding-left: 14px;
  }

  .page-faq .faq-details summary {
    padding-right: 22px;
    font-size: 14.5px;
  }

  .page-faq .faq-denom {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-entry__body,
  .page-faq .faq-details summary,
  .page-faq .faq-details summary::after,
  .page-faq .faq-banner__frame img,
  .page-faq .faq-inline-link a {
    transition: none;
  }
}