.page-faq {
  --faq-panel: var(--ink-800);
  --faq-hair: rgba(39, 64, 95, 0.9);
  background: var(--ink-900);
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-offset) + 12px) 0 clamp(28px, 6vw, 56px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 242, 228, 0.14), transparent 62%),
    radial-gradient(90% 80% at 0% 100%, rgba(255, 122, 47, 0.1), transparent 66%),
    var(--ink-900);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(39, 64, 95, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(39, 64, 95, 0.3) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 44px);
  align-items: start;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 18px;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 18em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.8;
  color: rgba(233, 243, 247, 0.88);
  max-width: 40em;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(15, 32, 56, 0.72);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-chip__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 242, 228, 0.08);
  transform: translateY(-2px);
}

.page-faq .faq-hero__strip {
  margin-top: 26px;
}

/* 图框 */
.page-faq .faq-figure {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: 0 18px 40px rgba(4, 10, 20, 0.5);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure__caption {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .faq-figure--inline {
  margin: 22px 0 0;
}

.page-faq .faq-figure--inline img {
  aspect-ratio: 4 / 3;
}

/* ---------- 主体：分类轨道 + 问答列 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  padding-bottom: clamp(44px, 8vw, 88px);
}

.page-faq .faq-rail {
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 4px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .faq-rail__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-rail__dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.page-faq .faq-rail__dot--cyan { background: var(--cyan); }
.page-faq .faq-rail__dot--orange { background: var(--orange); }
.page-faq .faq-rail__dot--grass { background: var(--grass); }
.page-faq .faq-rail__dot--steel { background: var(--steel); }

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--line);
  background: rgba(15, 32, 56, 0.85);
}

.page-faq .faq-rail__note {
  margin-top: 16px;
  padding: 12px 12px 12px 14px;
  border-left: 2px solid var(--cyan);
  background: rgba(53, 242, 228, 0.06);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-faq .faq-rail__note-label {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-rail__note-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(233, 243, 247, 0.8);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-group {
  padding-top: 4px;
  margin-bottom: clamp(30px, 6vw, 52px);
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

.page-faq .faq-group__head {
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__title {
  margin: 8px 0 8px;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
  max-width: 46em;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--faq-panel);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 242, 228, 0.55);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(4, 10, 20, 0.45);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 242, 228, 0.7);
  background: var(--ink-700);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
}

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

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

.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--steel);
  padding-top: 3px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__toggle::before {
  width: 11px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__toggle::after {
  width: 1.5px;
  height: 11px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__toggle {
  border-color: var(--cyan);
  background: rgba(53, 242, 228, 0.12);
}

.page-faq .faq-item[open] .faq-item__toggle::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg);
}

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

.page-faq .faq-item__a p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-hair);
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(233, 243, 247, 0.86);
  max-width: 44em;
}

.page-faq .faq-link {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 47, 0.55);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 收尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: 8px;
  padding: clamp(20px, 5vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background:
    linear-gradient(135deg, rgba(255, 122, 47, 0.12), transparent 55%),
    var(--ink-800);
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

.page-faq .faq-cta__title {
  margin: 10px 0 10px;
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1.32;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-cta__lead {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(233, 243, 247, 0.84);
  max-width: 42em;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 22px;
}

.page-faq .faq-cta__info {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-cta__row {
  display: grid;
  gap: 4px;
}

.page-faq .faq-cta__row dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-faq .faq-cta__row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-cta__row dd span {
  display: block;
  margin-top: 4px;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .faq-hero__chips {
    margin-top: 28px;
  }

  .page-faq .faq-cta__info {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-offset) + 20px);
  }

  .page-faq .faq-item > summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 20px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-shell {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-item,
  .page-faq .faq-item__toggle,
  .page-faq .faq-item__toggle::before,
  .page-faq .faq-item__toggle::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-link {
    transition: none;
  }

  .page-faq .faq-chip:hover,
  .page-faq .faq-item:hover {
    transform: none;
  }
}
<<<END>>>