.page-faq {
  --faq-shadow: var(--ink-deep);
  --faq-rule: var(--line-soft);
  padding-bottom: clamp(44px, 7vw, 88px);
}

.page-faq .breadcrumb {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 24px;
  padding: clamp(18px, 4vw, 36px) 0 clamp(32px, 6vw, 64px);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: 24px 18px 22px 26px;
  border: 2px solid var(--faq-rule);
  border-left: 0;
  background: linear-gradient(170deg, rgba(18, 48, 42, 0.7), rgba(11, 31, 26, 0));
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: -2px;
  bottom: -2px;
  width: 8px;
  border-left: 2px solid var(--faq-rule);
  background-image: repeating-linear-gradient(
    180deg,
    var(--brass) 0 2px,
    transparent 2px 11px
  );
}

.page-faq .faq-hero__title {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(46px, 12vw, 104px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-faq .faq-hero__lede {
  margin: 0 0 20px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--cream);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--mute);
}

.page-faq .faq-hero__facts .mono {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-faq .faq-hero__media {
  margin: 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 2px solid var(--faq-rule);
  box-shadow: 8px 8px 0 0 var(--faq-shadow);
}

.page-faq .faq-hero__media figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

/* ---------- 分类分段控制 ---------- */
.page-faq .faq-deck {
  margin-top: clamp(20px, 4vw, 44px);
}

.page-faq .faq-seg {
  display: flex;
  flex-wrap: nowrap;
  gap: 2px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding: 0 0 2px;
  border: 0;
  border-bottom: 2px solid var(--faq-rule);
  border-radius: 0;
  background: transparent;
  scrollbar-width: thin;
}

.page-faq .faq-seg [role="tab"] {
  position: relative;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--mute);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--t-hover) var(--ease);
}

.page-faq .faq-seg [role="tab"]::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: -2px;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-seg) var(--ease);
}

.page-faq .faq-seg [role="tab"]:hover {
  color: var(--gold-soft);
}

.page-faq .faq-seg [role="tab"][aria-selected="true"] {
  color: var(--cream);
}

.page-faq .faq-seg [role="tab"][aria-selected="true"]::after {
  transform: scaleX(1);
}

.page-faq .faq-seg__code {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--brass);
}

.page-faq .faq-seg [role="tab"][aria-selected="true"] .faq-seg__code {
  color: var(--gold);
}

.page-faq .faq-seg [role="tab"]:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* ---------- 问答抽屉 ---------- */
.page-faq .faq-panel {
  display: grid;
  gap: 14px;
  padding-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 6px;
}

.page-faq .faq-item {
  border: 2px solid var(--faq-rule);
  background: var(--ink);
  box-shadow: 6px 6px 0 0 var(--faq-shadow);
  transition: border-color var(--t-fold) var(--ease), box-shadow var(--t-fold) var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--gold);
  box-shadow: 6px 6px 0 0 var(--brass);
}

.page-faq .faq-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--cream);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -2px;
  box-shadow: inset 0 0 0 1px var(--ink);
}

.page-faq .faq-q__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--brass);
  transition: color var(--t-fold) var(--ease);
}

.page-faq .faq-item[open] .faq-q__no {
  color: var(--gold);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  width: 14px;
  height: 14px;
  transition: transform var(--t-fold) var(--ease);
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--mute);
  transition: background var(--t-fold) var(--ease), opacity var(--t-fold) var(--ease);
}

.page-faq .faq-q__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-q__mark {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-q__mark::before,
.page-faq .faq-item[open] .faq-q__mark::after {
  background: var(--gold);
}

.page-faq .faq-item[open] .faq-q__mark::after {
  opacity: 0;
}

.page-faq .faq-a {
  padding: 15px 16px 18px;
  border-top: 1px dashed var(--faq-rule);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--cream);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 68ch;
}

.page-faq .faq-a a {
  color: var(--cream);
  text-decoration: underline;
  text-decoration-color: var(--mint);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--t-hover) var(--ease), text-decoration-thickness var(--t-hover) var(--ease);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--mint);
  text-decoration-thickness: 3px;
}

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

/* ---------- 中段横幅 ---------- */
.page-faq .faq-band {
  margin: 0 0 4px;
  border: 2px solid var(--faq-rule);
  box-shadow: 8px 8px 0 0 var(--faq-shadow);
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

/* ---------- 延伸索引 ---------- */
.page-faq .faq-tail {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: 22px;
  border-top: 2px solid var(--faq-rule);
}

.page-faq .faq-tail__list {
  display: grid;
  gap: 12px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-tail__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--mute);
}

.page-faq .faq-tail__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--brass);
}

.page-faq .faq-tail__list a {
  color: var(--cream);
  text-decoration: underline;
  text-decoration-color: var(--mint);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-tail__list a:hover,
.page-faq .faq-tail__list a:focus-visible {
  color: var(--mint);
  text-decoration-thickness: 2px;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 44px;
    padding-top: 42px;
  }

  .page-faq .faq-hero__frame {
    padding: 32px 28px 30px 36px;
  }

  .page-faq .faq-hero__media {
    margin-top: 58px;
  }

  .page-faq .faq-q {
    padding: 18px 20px;
  }

  .page-faq .faq-a {
    padding: 18px 22px 22px 52px;
  }

  .page-faq .faq-tail__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-tail__list li {
    align-items: flex-start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__frame {
    padding-right: 48px;
  }

  .page-faq .faq-hero__media {
    margin-top: 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-seg [role="tab"],
  .page-faq .faq-seg [role="tab"]::after,
  .page-faq .faq-item,
  .page-faq .faq-q__no,
  .page-faq .faq-q__mark,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-a a {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-q__mark {
    transform: none;
  }
}