.page-faq {
  --faq-pad: clamp(20px, 3.4vw, 46px);
  --faq-lead-size: clamp(0.95rem, 1.05vw, 1.02rem);
  --faq-term-border: var(--paper-200);
  display: block;
  background: var(--ink-900);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 2.6vw, 34px) 0 clamp(40px, 6vw, 78px);
  background: var(--ink-900);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-500) 22%, var(--gold-500) 58%, transparent);
  opacity: 0.55;
}

.page-faq .faq-hero__shell {
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
}

.page-faq .faq-hero__crumb {
  color: var(--gray-400);
}

.page-faq .faq-hero__crumb a {
  color: var(--gray-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-hero__crumb a:hover,
.page-faq .faq-hero__crumb a:focus-visible {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-faq .faq-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-500);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 5.6vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper-50);
}

.page-faq .faq-hero__lede {
  margin: 0 0 22px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: var(--faq-lead-size);
  line-height: 1.85;
  color: #C9CFDC;
}

.page-faq .faq-hero__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-faq .faq-readouts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .readout {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding: 10px 18px 11px;
  border: 1px solid rgba(212, 160, 23, 0.32);
  border-radius: var(--pill);
  background: rgba(15, 26, 46, 0.7);
  flex-wrap: wrap;
}

.page-faq .readout__value {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-500);
  font-variant-numeric: tabular-nums;
}

.page-faq .readout__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-500);
}

.page-faq .readout__label {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gray-400);
}

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

.page-faq .faq-hero__frame {
  background: var(--ink-950);
  border-radius: var(--radius-panel);
}

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

/* ---------- 分组跳转条 ---------- */
.page-faq .faq-jump {
  background: var(--ink-950);
  border-bottom: 1px solid rgba(212, 160, 23, 0.2);
}

.page-faq .faq-jump__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-top: 12px;
  padding-bottom: 12px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump__rail a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 8px 16px;
  border: 1px solid rgba(154, 163, 181, 0.28);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: #C9CFDC;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 200ms var(--ease), color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-jump__rail a:hover,
.page-faq .faq-jump__rail a:focus-visible {
  border-color: var(--gold-500);
  color: var(--gold-500);
  background: rgba(212, 160, 23, 0.08);
}

.page-faq .faq-jump__num {
  font-weight: 700;
  color: var(--gold-500);
}

/* ---------- 堆叠 ---------- */
.page-faq .faq-stack {
  padding-bottom: clamp(30px, 5vw, 68px);
  background: var(--ink-900);
}

.page-faq .faq-group {
  padding: clamp(26px, 3.2vw, 44px) var(--faq-pad) clamp(30px, 3.6vw, 48px);
  background: var(--paper-50);
  border-radius: var(--radius-panel);
  color: var(--ink-900);
}

.page-faq .faq-group--terms {
  background: var(--paper-50);
}

.page-faq .faq-group--closing {
  background: var(--ink-700);
  color: var(--paper-50);
}

.page-faq .faq-group__head {
  margin-bottom: 14px;
}

.page-faq .faq-group__lead {
  margin: 0 0 clamp(20px, 2.4vw, 30px);
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: var(--faq-lead-size);
  line-height: 1.85;
  color: var(--gray-600);
}

.page-faq .faq-group--closing .faq-group__lead,
.page-faq .faq-closing__lede {
  color: #C9CFDC;
}

.page-faq .faq-group--closing .section-title {
  color: var(--paper-50);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list > li {
  border-top: 1px solid var(--paper-200);
}

.page-faq .faq-list > li:last-child {
  border-bottom: 1px solid var(--paper-200);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 17px 46px 17px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.98rem, 1.2vw, 1.06rem);
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--ink-900);
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 3px;
  height: 0;
  border-radius: var(--pill);
  background: var(--gold-500);
  transition: height 320ms var(--ease);
}

.page-faq .faq-item[open] > summary::before {
  height: 26px;
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--gold-700);
  transition: transform 320ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-item > summary:hover {
  color: var(--ink-700);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 2px;
  border-radius: 8px;
}

.page-faq .faq-item__q {
  display: block;
}

.page-faq .faq-item__a {
  padding: 0 46px 20px 22px;
  font-family: var(--font-body);
  font-size: clamp(0.94rem, 1.05vw, 1rem);
  line-height: 1.85;
  color: var(--ink-700);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: var(--content-max);
}

.page-faq .faq-item__a a {
  color: var(--teal-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 102, 102, 0.4);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--gold-700);
}

/* ---------- 三步流程条 ---------- */
.page-faq .faq-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(22px, 2.6vw, 32px);
  padding: 0;
  list-style: none;
}

.page-faq .faq-flow__step {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 20px 10px 12px;
  border: 1px solid var(--teal-700);
  border-radius: var(--pill);
  background: rgba(60, 141, 141, 0.07);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--teal-700);
  transition: opacity 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-faq .faq-flow__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--teal-700);
  color: var(--paper-50);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .faq-flow:hover .faq-flow__step {
  opacity: 0.45;
}

.page-faq .faq-flow .faq-flow__step:hover {
  opacity: 1;
  border-color: var(--gold-500);
  background: rgba(212, 160, 23, 0.1);
}

.page-faq .faq-flow .faq-flow__step:hover .faq-flow__idx {
  background: var(--gold-500);
}

/* ---------- 术语表 ---------- */
.page-faq .faq-terms__layout {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-faq .faq-terms {
  margin: 0;
  border: 1px solid var(--faq-term-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #FFFFFF;
}

.page-faq .faq-term {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 5px 14px;
  padding: 15px 18px 16px;
  border-bottom: 1px solid var(--faq-term-border);
}

.page-faq .faq-term:last-child {
  border-bottom: 0;
}

.page-faq .faq-term:nth-child(even) {
  background: rgba(230, 223, 204, 0.42);
}

.page-faq .faq-term dt {
  grid-column: 1 / 2;
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-faq .faq-term dd {
  grid-column: 1 / 2;
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-faq .faq-term__copy {
  grid-row: 1 / 3;
  grid-column: 2 / 3;
  align-self: start;
  padding: 5px 13px;
  border: 1px solid var(--gold-700);
  border-radius: var(--pill);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-700);
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-term__copy:hover,
.page-faq .faq-term__copy:focus-visible {
  background: var(--gold-700);
  color: var(--paper-50);
}

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

.page-faq .faq-terms__frame {
  background: var(--ink-900);
  border-radius: var(--radius-card);
}

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

.page-faq .faq-terms__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--gray-600);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-closing__grid {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
}

.page-faq .faq-closing__lede {
  margin: 0 0 18px;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: var(--faq-lead-size);
  line-height: 1.85;
}

.page-faq .faq-brief {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-brief li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px 9px 11px;
  border: 1px solid rgba(212, 160, 23, 0.45);
  border-radius: var(--pill);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--paper-50);
}

.page-faq .faq-brief__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold-500);
}

.page-faq .faq-closing__note {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.85;
  color: #C9CFDC;
}

.page-faq .faq-closing__note a {
  color: var(--gold-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 160, 23, 0.45);
}

.page-faq .faq-closing__note a:hover,
.page-faq .faq-closing__note a:focus-visible {
  border-bottom-color: var(--paper-50);
}

.page-faq .faq-closing__btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 6.2fr) minmax(0, 5.8fr);
  }

  .page-faq .faq-terms {
    display: block;
  }

  .page-faq .faq-terms__layout {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.8fr);
    align-items: start;
  }

  .page-faq .faq-closing__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-hero__figure {
    margin-top: clamp(0px, 2vw, 30px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-terms {
    column-count: 2;
    column-gap: 0;
    display: block;
  }

  .page-faq .faq-term {
    break-inside: avoid;
  }

  .page-faq .faq-terms__layout {
    grid-template-columns: minmax(0, 7.6fr) minmax(0, 4.4fr);
  }
}

@media (max-width: 639px) {
  .page-faq .faq-item > summary {
    padding: 15px 40px 15px 16px;
  }

  .page-faq .faq-item > summary::before {
    left: 0;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 18px 16px;
  }

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

  .page-faq .faq-term__copy {
    grid-row: 3 / 4;
    grid-column: 1 / 2;
    justify-self: start;
    margin-top: 4px;
  }

  .page-faq .faq-readouts {
    gap: 8px;
  }

  .page-faq .readout {
    padding: 9px 14px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::before,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-flow__step,
  .page-faq .faq-flow .faq-flow__step,
  .page-faq .faq-term__copy {
    transition-duration: 150ms;
    transition-property: opacity, background, color, border-color;
  }

  .page-faq .faq-item > summary::before {
    transition: none;
  }
}
<<<END>>>