.page-faq {
  background: var(--paper);
  color: var(--ink);
}

.page-faq section[id] {
  scroll-margin-top: 84px;
}

.page-faq .faq-crumbs {
  padding: 18px 0 0;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard-deep);
  padding: 26px 18px 24px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid var(--stone);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  position: relative;
}

.page-faq .faq-hero__title {
  position: relative;
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: clamp(28px, 7.4vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 9px;
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 86%);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  border-top: 3px solid var(--ink);
  padding-top: 10px;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-ink);
}

.page-faq .faq-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--moss);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

.page-faq .faq-hero__side {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 3px solid var(--stone);
  padding-left: 16px;
}

.page-faq .faq-hero__side .anno--rot {
  writing-mode: horizontal-tb;
  transform: none;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-ink);
  margin: 0;
}

.page-faq .faq-hero__side-note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--moss);
  max-width: 28em;
}

/* ---------- 三版脊标 ---------- */
.page-faq .faq-spines {
  display: grid;
  gap: 14px;
  margin-top: 10px;
}

.page-faq .faq-spine {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 14px 16px;
  min-height: 98px;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-spine__code {
  display: block;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--cyan-deep);
  border-right: 1px solid var(--stone);
  padding-right: 12px;
}

.page-faq .faq-spine__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-spine__label {
  font-size: 18px;
  font-weight: 700;
}

.page-faq .faq-spine__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--moss);
}

.page-faq .faq-spine--now {
  background: var(--rock);
  color: var(--paper);
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(216, 167, 63, 0.3);
}

.page-faq .faq-spine--now .faq-spine__code {
  color: var(--gold-lit);
  border-right-color: rgba(240, 214, 138, 0.45);
}

.page-faq .faq-spine--now .faq-spine__label {
  color: var(--gold-lit);
}

.page-faq .faq-spine--now .faq-spine__note {
  color: rgba(245, 239, 227, 0.78);
}

/* ---------- 版本说明双栏 ---------- */
.page-faq .faq-versions {
  display: grid;
  gap: 28px;
  margin-top: 38px;
}

.page-faq .faq-versions__aside h3 {
  margin: 0 0 14px;
}

.page-faq .faq-versions__aside p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .faq-versions__main .lead {
  margin: 0 0 22px;
}

.page-faq .faq-versions__figure {
  margin: 0;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-versions__figure .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 四类归档 ---------- */
.page-faq .faq-section-lead {
  margin: 14px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
  max-width: 40em;
}

.page-faq .section--rock .section-head__title {
  color: var(--paper);
}

.page-faq .section--rock .section-head__eyebrow {
  color: var(--cyan-soft);
}

.page-faq .section--rock .faq-section-lead {
  color: rgba(245, 239, 227, 0.82);
}

.page-faq .faq-archive-figure {
  margin: 30px 0 26px;
  aspect-ratio: 2 / 1;
}

.page-faq .faq-archive-figure .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}

.page-faq .faq-cat-nav a {
  text-decoration: none;
}

.page-faq .faq-cats {
  display: grid;
  gap: 18px;
}

.page-faq .faq-cat {
  padding: 18px 16px 16px;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: 96px;
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-within {
  border-color: var(--gold);
  box-shadow: var(--shadow-hard-deep);
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 2px solid var(--stone);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.page-faq .faq-cat__head h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .faq-cat__count {
  font-size: 13px;
  color: var(--gold-ink);
}

.page-faq .faq-cat__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-cat__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-cat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--vermilion);
}

.page-faq .faq-cat__more {
  margin: 0;
  font-size: 14.5px;
}

.page-faq .faq-cat__more a {
  color: var(--cyan-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-soft);
}

/* ---------- 高频问题折叠卡 ---------- */
.page-faq .faq-qs {
  display: grid;
  gap: 14px;
}

.page-faq .faq-q {
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-q:hover,
.page-faq .faq-q[open] {
  border-color: var(--gold);
}

.page-faq .faq-q summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  display: grid;
  gap: 10px;
  padding: 16px 52px 16px 16px;
}

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

.page-faq .faq-q summary::after {
  content: "＋";
  position: absolute;
  right: 16px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold-ink);
}

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

.page-faq .faq-q[open] summary {
  border-bottom: 2px solid var(--stone);
}

.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .faq-q__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-q__ver {
  font-size: 12.5px;
  color: var(--cyan-deep);
}

.page-faq .faq-q__q {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
}

.page-faq .faq-q__body {
  padding: 0 16px 18px;
}

.page-faq .faq-q__body p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .faq-inline-link {
  color: var(--cyan-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-soft);
}

/* ---------- 版本差异表 ---------- */
.page-faq .heading--on-felt {
  color: var(--paper);
}

.page-faq .section--felt .section-head__eyebrow {
  color: var(--gold-lit);
}

.page-faq .faq-section-lead--on-felt {
  color: rgba(245, 239, 227, 0.86);
}

.page-faq .faq-table-wrap {
  margin-top: 26px;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard-deep);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.72;
  border-bottom: 1px solid var(--stone);
}

.page-faq .faq-table thead th {
  background: var(--rock);
  color: var(--gold-lit);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-table thead th.faq-col-now {
  background: var(--gold);
  color: var(--rock);
}

.page-faq .faq-table tbody th {
  font-weight: 700;
  white-space: nowrap;
  color: var(--ink);
}

.page-faq .faq-table tbody td.faq-cell-now {
  background: rgba(216, 167, 63, 0.18);
  font-weight: 600;
}

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: none;
}

.page-faq .faq-diff-note {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 239, 227, 0.86);
}

/* ---------- 联系收束 ---------- */
.page-faq .faq-help {
  padding: 28px 18px;
  background: var(--rock);
  color: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard-deep);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 26px;
}

.page-faq .faq-help .section-head__eyebrow {
  color: var(--cyan-soft);
}

.page-faq .heading--on-rock {
  margin: 12px 0 16px;
  color: var(--paper);
}

.page-faq .faq-help__main p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(245, 239, 227, 0.88);
}

.page-faq .faq-help__side {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 2px solid rgba(216, 167, 63, 0.5);
}

.page-faq .faq-help__mail {
  margin: 0;
  font-size: 15px;
  color: var(--gold-lit);
  word-break: break-all;
}

.page-faq .faq-help__hours {
  margin: 0;
  font-size: 13.5px;
  color: rgba(245, 239, 227, 0.82);
}

.page-faq .faq-help__actions {
  margin: 4px 0 0;
}

.page-faq .faq-help__fine {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(245, 239, 227, 0.78);
}

.page-faq .faq-help__fine a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-soft);
}

.page-faq a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-spines {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

  .page-faq .faq-hero {
    padding: 36px 32px 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.55fr 0.85fr;
    gap: 42px;
    align-items: start;
  }

  .page-faq .faq-hero__side .anno--rot {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .page-faq .faq-versions {
    grid-template-columns: 34fr 62fr;
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-versions__aside {
    position: sticky;
    top: 86px;
  }

  .page-faq .faq-help {
    padding: 40px 36px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: 1.45fr 0.8fr;
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-help__side {
    padding-top: 0;
    border-top: none;
    padding-left: 20px;
    border-left: 2px solid rgba(216, 167, 63, 0.5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-q {
    transition: none;
  }
}