.page-faq {
  --faq-index-w: 210px;
  --faq-line: rgba(207, 201, 184, .18);
  --faq-line-strong: rgba(201, 255, 61, .5);
  --faq-dim: #8FA79B;
  --faq-soft: #CFC9B8;
  --faq-dark: #0A0D0B;
  --faq-ink-soft: rgba(10, 13, 11, .68);
  display: block;
  background: var(--tvt-deep);
  color: var(--tvt-cream);
}

/* ── 首屏 ───────────────────────────────────────────── */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(22px, 3.4vw, 46px);
  align-items: end;
  padding-block: clamp(16px, 2.6vw, 34px) clamp(30px, 5vw, 66px);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: .98;
  letter-spacing: .005em;
  color: var(--tvt-cream);
  max-width: 15ch;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  color: var(--faq-soft);
  max-width: 60ch;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  margin: 24px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--faq-dim);
}

.page-faq .faq-hero__facts .num {
  color: var(--tvt-lime);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--faq-line);
  background: var(--tvt-alt);
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

/* ── 快速入口 ───────────────────────────────────────── */
.page-faq .faq-quick {
  padding-block: clamp(28px, 4vw, 60px) 0;
}

.page-faq .quick-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(22px, 3vw, 36px);
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .quick-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 20px 26px;
  background: var(--tvt-deep);
  color: var(--tvt-cream);
  text-decoration: none;
  transition: background var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-faq .quick-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--tvt-lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) var(--ease);
}

.page-faq .quick-card:hover,
.page-faq .quick-card:focus-visible {
  background: var(--tvt-alt);
}

.page-faq .quick-card:hover::before,
.page-faq .quick-card:focus-visible::before {
  transform: scaleX(1);
}

.page-faq .quick-card--report::before {
  background: var(--tvt-brick);
}

.page-faq .quick-card__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--tvt-orange);
}

.page-faq .quick-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.4vw, 26px);
  line-height: 1.15;
}

.page-faq .quick-card__desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--faq-soft);
}

.page-faq .quick-card__go {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--tvt-blue);
}

/* ── 主体：索引 + 问答流 ────────────────────────────── */
.page-faq .faq-body {
  padding-block: clamp(40px, 5.4vw, 80px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--tvt-lime);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px 9px 0;
  border-left: 1px solid transparent;
  color: var(--faq-dim);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease), border-color var(--t-mid) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--tvt-cream);
  border-left-color: var(--tvt-lime);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--tvt-sage);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4.6vw, 62px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--tvt-orange);
  margin: 0;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--tvt-cream);
  transition: color var(--t-mid) var(--ease);
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--tvt-lime);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--faq-dim);
  max-width: 54ch;
}

/* ── 折叠问答 ───────────────────────────────────────── */
.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  transition: border-color var(--t-mid) var(--ease);
}

.page-faq .qa[open] {
  border-bottom-color: var(--tvt-lime);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--tvt-cream);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .qa__q::-webkit-details-marker,
.page-faq .qa__q::marker {
  display: none;
  content: "";
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--tvt-lime);
}

.page-faq .qa__mark {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--tvt-lime);
  transition: transform var(--t-mid) var(--ease), opacity var(--t-mid) var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 2px 22px;
  max-width: 70ch;
  color: var(--faq-soft);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .qa__a > p {
  margin: 0;
}

.page-faq .qa__a > p + p {
  margin-top: 10px;
}

.page-faq .qa__a .ulink {
  color: var(--tvt-blue);
}

/* 口径数值表 */
.page-faq .spec {
  margin: 16px 0 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .spec__row {
  display: grid;
  grid-template-columns: minmax(78px, 118px) minmax(0, 1fr);
  gap: 14px;
  padding: 8px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .spec dt {
  margin: 0;
  font-size: 13.5px;
  color: var(--faq-dim);
}

.page-faq .spec dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
  color: var(--tvt-cream);
  overflow-wrap: anywhere;
}

.page-faq .spec dd .num {
  color: var(--tvt-lime);
}

/* ── 术语表（反色区） ───────────────────────────────── */
.page-faq .page-faq__glossary {
  background: var(--tvt-cream);
  color: var(--tvt-dark);
  padding-block: clamp(38px, 5vw, 78px);
}

.page-faq .glossary__figure {
  margin: 0 0 clamp(26px, 3.4vw, 46px);
  border: 1px solid rgba(10, 13, 11, .16);
  background: rgba(10, 13, 11, .06);
  overflow: hidden;
}

.page-faq .glossary__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.6) contrast(1.02);
}

.page-faq .glossary__figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(10, 13, 11, .58);
  border-top: 1px solid rgba(10, 13, 11, .12);
}

.page-faq .glossary__head .eyebrow {
  color: var(--tvt-blue);
}

.page-faq .glossary__head .section-title {
  color: #0B1A14;
}

.page-faq .glossary__head .lede {
  color: var(--faq-ink-soft);
  max-width: 62ch;
}

.page-faq .glossary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(24px, 3vw, 40px) 0 0;
  border-top: 1px solid rgba(10, 13, 11, .18);
}

.page-faq .glossary__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(10, 13, 11, .18);
}

.page-faq .glossary__term {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--tvt-blue);
}

.page-faq .glossary__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #22302A;
}

.page-faq .glossary__foot {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
  max-width: 62ch;
}

.page-faq .glossary__foot .ulink {
  color: var(--tvt-blue);
}

/* ── 响应式 ─────────────────────────────────────────── */
@media (min-width: 640px) {
  .page-faq .quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }
}

@media (min-width: 1040px) {
  .page-faq .quick-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(34px, 4.4vw, 68px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: clamp(20px, 3vw, 40px);
  }

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

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    padding: 10px 0 10px 14px;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 60px);
  }

  .page-faq .glossary__item {
    grid-template-columns: minmax(104px, 132px) minmax(0, 1fr);
    gap: 6px 20px;
    padding: 17px 0;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__title {
    max-width: 18ch;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-card,
  .page-faq .quick-card::before,
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-group__title {
    transition: color var(--t-fast) linear, border-color var(--t-fast) linear, background-color var(--t-fast) linear;
    transform: none;
  }
}

.page-faq {
  --tvt-dark: var(--tvt-ink);
}