.page-faq {
  --faq-numcol: 62px;
  --faq-gap: 14px;
}

/* ---------- 首屏：口径手册封面 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 5vw, 46px) 0 clamp(28px, 5vw, 48px);
}

.page-faq .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted-on-dark);
}

.page-faq .crumbs a {
  color: var(--muted-on-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--neon-grass);
  border-bottom-color: var(--neon-grass);
}

.page-faq .crumbs__sep {
  margin: 0 8px;
  color: var(--slate-green);
}

.page-faq .faq-hero__eyebrow {
  margin-top: clamp(20px, 4vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--electric-cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 9.5vw, 66px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--card-ivory);
}

.page-faq .faq-hero__lede {
  margin-top: 16px;
  max-width: var(--measure);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.75;
  color: var(--muted-on-dark);
}

/* 结论数字条 */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 5vw, 40px);
  background: var(--hair-dark);
  border: 1px solid var(--hair-dark);
}

.page-faq .faq-stats .stat {
  background: var(--ink-field);
  padding: 16px 14px 18px;
}

.page-faq .faq-stats .stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--card-ivory);
}

.page-faq .faq-stats .stat__unit {
  margin-left: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--neon-grass);
}

.page-faq .faq-stats .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--muted-on-dark);
}

/* 分组索引 */
.page-faq .faq-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(20px, 4vw, 32px);
  background: var(--hair-dark);
  border-top: 1px solid var(--hair-dark);
  border-bottom: 1px solid var(--hair-dark);
}

.page-faq .faq-map__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 6px;
  background: var(--ink-field);
  text-decoration: none;
  transition: background-color 0.16s ease;
}

.page-faq .faq-map__item:hover,
.page-faq .faq-map__item:focus-visible {
  background: var(--pitch-teal);
}

.page-faq .faq-map__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon-grass);
}

.page-faq .faq-map__label {
  font-size: 15px;
  color: var(--card-ivory);
}

.page-faq .faq-map__n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted-on-dark);
  white-space: nowrap;
}

/* ---------- 分组骨架 ---------- */
.page-faq .faq-group {
  padding: clamp(38px, 7vw, 84px) 0;
  border-top: 1px solid var(--hair-dark);
}

.page-faq .section--ivory.faq-group {
  border-top: 1px solid var(--hairline-cool);
}

.page-faq .faq-group,
.page-faq .faq-item {
  scroll-margin-top: calc(var(--cmdbar-h) + 20px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-faq .sec-num {
  font-family: var(--font-narrow);
  font-size: clamp(34px, 8vw, 48px);
  line-height: 0.9;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--neon-grass);
}

.page-faq .section--ivory .sec-num {
  color: var(--deep-teal);
}

.page-faq .sec-title {
  font-size: clamp(22px, 4.6vw, 32px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--card-ivory);
}

.page-faq .section--ivory .sec-title {
  color: var(--ink-black);
}

.page-faq .sec-lede {
  margin-top: 10px;
  max-width: 560px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-on-dark);
}

.page-faq .section--ivory .sec-lede {
  color: var(--slate-green);
}

/* 主体网格 */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 44px);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-answers {
  border-bottom: 1px solid var(--hair-dark);
}

.page-faq .section--ivory .faq-answers {
  border-bottom-color: var(--hairline-cool);
}

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

.page-faq .section--ivory .faq-item {
  border-top-color: var(--hairline-cool);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: var(--faq-numcol) minmax(0, 1fr) 18px;
  column-gap: var(--faq-gap);
  align-items: start;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  text-align: right;
  padding-top: 2px;
  color: var(--slate-green);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--neon-grass);
}

.page-faq .section--ivory .faq-item[open] > summary::after {
  color: var(--deep-teal);
}

.page-faq .faq-q {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  white-space: nowrap;
  padding-top: 5px;
  color: var(--neon-grass);
}

.page-faq .faq-q::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  margin-left: 6px;
  vertical-align: 3px;
  background: currentColor;
}

.page-faq .section--ivory .faq-q {
  color: var(--deep-teal);
}

.page-faq .faq-q__text {
  font-size: clamp(15px, 2.6vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--card-ivory);
  transition: color 0.16s ease;
}

.page-faq .section--ivory .faq-q__text {
  color: var(--ink-black);
}

.page-faq .faq-item > summary:hover .faq-q__text,
.page-faq .faq-item > summary:focus-visible .faq-q__text {
  color: var(--neon-grass);
}

.page-faq .section--ivory .faq-item > summary:hover .faq-q__text,
.page-faq .section--ivory .faq-item > summary:focus-visible .faq-q__text {
  color: var(--deep-teal);
}

.page-faq .faq-a {
  padding: 0 20px 22px calc(var(--faq-numcol) + var(--faq-gap));
  max-width: 74ch;
}

.page-faq .faq-a__lead {
  font-size: clamp(14px, 2.3vw, 16px);
  line-height: 1.7;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--card-ivory);
}

.page-faq .faq-a__note {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-on-dark);
}

.page-faq .section--ivory .faq-a__lead {
  color: var(--ink-black);
}

.page-faq .section--ivory .faq-a__note {
  color: var(--slate-green);
}

.page-faq .faq-a a {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-dark-strong);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  border-bottom-color: var(--neon-grass);
  color: var(--neon-grass);
}

.page-faq .section--ivory .faq-a a {
  color: var(--deep-teal);
  border-bottom-color: var(--hairline-cool);
}

.page-faq .section--ivory .faq-a a:hover,
.page-faq .section--ivory .faq-a a:focus-visible {
  border-bottom-color: var(--deep-teal);
  color: var(--pitch-teal);
}

.page-faq .faq-item:target {
  background: rgba(53, 240, 160, 0.07);
}

.page-faq .section--ivory .faq-item:target {
  background: rgba(11, 58, 56, 0.06);
}

/* 双列分组（03） */
.page-faq .faq-answers--split {
  border-bottom: 0;
}

.page-faq .faq-answers--split .faq-item:last-child {
  border-bottom: 1px solid var(--hair-dark);
}

/* ---------- 侧栏与图形 ---------- */
.page-faq .faq-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.page-faq .figure__frame {
  overflow: hidden;
  border: 1px solid var(--hair-dark-strong);
}

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

.page-faq .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted-on-dark);
}

.page-faq .section--ivory .figure__cap {
  color: var(--slate-green);
}

.page-faq .faq-diagram {
  margin: 0;
  padding: 16px 14px 12px;
  border: 1px solid var(--hair-dark-strong);
  background: var(--pitch-teal);
}

.page-faq .faq-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-diagram__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted-on-dark);
}

.page-faq .faq-aside__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-on-dark);
}

.page-faq .faq-aside__note a {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-dark-strong);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-aside__note a:hover,
.page-faq .faq-aside__note a:focus-visible {
  color: var(--neon-grass);
  border-bottom-color: var(--neon-grass);
}

/* 字段构成面板 */
.page-faq .faq-panel {
  padding: 20px 18px 18px;
  background: var(--pitch-teal);
  border: 1px solid var(--hair-dark-strong);
}

.page-faq .panel__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--neon-grass);
  margin-bottom: 12px;
}

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

.page-faq .faq-fields__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 11px 0;
  border-top: 1px solid var(--hair-dark);
  font-size: 14px;
  color: var(--card-ivory);
}

.page-faq .faq-fields__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  line-height: 1;
  color: var(--electric-cyan);
}

.page-faq .faq-panel__total {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted-on-dark);
}

.page-faq .faq-panel__total span {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--neon-grass);
}

/* 联络面板 */
.page-faq .faq-contact {
  padding: 20px 18px 18px;
  background: var(--pitch-teal);
  border: 1px solid var(--hair-dark-strong);
}

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

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--hair-dark);
}

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--neon-grass);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--card-ivory);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted-on-dark);
}

.page-faq .faq-contact__note a {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-dark-strong);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-contact__note a:hover,
.page-faq .faq-contact__note a:focus-visible {
  color: var(--neon-grass);
  border-bottom-color: var(--neon-grass);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-map {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-answers--split {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-faq .faq-answers--split .faq-item:last-child {
    border-bottom: 0;
  }
}

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

  .page-faq .faq-aside {
    align-self: start;
    position: sticky;
    top: 28px;
  }
}

@media (max-width: 560px) {
  .page-faq {
    --faq-numcol: 40px;
    --faq-gap: 10px;
  }

  .page-faq .faq-q::after {
    display: none;
  }

  .page-faq .faq-q {
    font-size: 11px;
    letter-spacing: 0.02em;
  }

  .page-faq .faq-a {
    padding-right: 8px;
  }

  .page-faq .faq-stats .stat {
    padding: 14px 12px 16px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 68px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .crumbs a,
  .page-faq .faq-map__item,
  .page-faq .faq-q__text,
  .page-faq .faq-a a,
  .page-faq .faq-aside__note a,
  .page-faq .faq-contact__note a {
    transition: none;
  }
}