.page-faq {
  --faq-rail-w: 264px;
  --faq-rule: rgba(217, 180, 81, 0.26);
  --faq-hair: rgba(195, 204, 198, 0.13);
  --faq-ink: rgba(12, 16, 18, 0.62);

  background: var(--bg-deep);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-faq .faq-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 44%;
  opacity: 0.4;
  filter: saturate(0.68) contrast(1.06);
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 24, 18, 0.6) 0%, rgba(6, 24, 18, 0.88) 56%, var(--bg-deep) 100%),
    linear-gradient(96deg, rgba(6, 24, 18, 0.94) 0%, rgba(6, 24, 18, 0.34) 60%, rgba(14, 31, 51, 0.62) 100%);
}

.page-faq .faq-hero__inner {
  padding-top: clamp(40px, 7vw, 78px);
  padding-bottom: clamp(36px, 6vw, 62px);
}

.page-faq .faq-hero__crumbs {
  margin-bottom: clamp(22px, 4vw, 40px);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text);
  opacity: 0.72;
}

.page-faq .faq-hero__crumbs a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  max-width: 18ch;
  font-size: clamp(30px, 5.6vw, 60px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--title);
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 148px;
  padding: 11px 16px;
  border-left: 2px solid var(--gold);
  background: var(--faq-ink);
  backdrop-filter: blur(6px);
}

.page-faq .faq-fact__read {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-faq .faq-fact__num {
  font-family: var(--mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-fact__unit {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-fact__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
  opacity: 0.84;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-main {
  padding-top: clamp(38px, 6vw, 72px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-rail__sticky {
  border-top: 1px solid var(--faq-rule);
  padding-top: 14px;
}

.page-faq .faq-rail__head {
  margin: 0 0 14px;
}

.page-faq .faq-rail__scroll {
  max-height: 300px;
  overflow-y: auto;
  padding-right: 8px;
  scrollbar-width: thin;
}

.page-faq .faq-rail__scroll::-webkit-scrollbar {
  width: 4px;
}

.page-faq .faq-rail__scroll::-webkit-scrollbar-thumb {
  background: var(--faq-rule);
  border-radius: 2px;
}

.page-faq .faq-rail__group + .faq-rail__group {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-rail__cat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--title);
}

.page-faq .faq-rail__code {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 8px;
  padding: 6px 0 6px 11px;
  border-left: 2px solid transparent;
  color: var(--text);
  font-size: 12.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--title);
  border-left-color: var(--gold);
  background-color: rgba(255, 255, 255, 0.035);
}

.page-faq .faq-rail__num {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--gold);
  padding-top: 2px;
}

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

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 68px);
}

.page-faq .faq-group__head {
  margin-bottom: 6px;
}

.page-faq .faq-group__title {
  margin: 6px 0 14px;
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--title);
}

.page-faq .faq-group__rule {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(217, 180, 81, 0.12) 72%, transparent 100%);
}

.page-faq .faq-group__rule--long { width: 82%; }
.page-faq .faq-group__rule--mid { width: 58%; }
.page-faq .faq-group__rule--short { width: 34%; }

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-hair);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 14px;
  align-items: start;
  gap: 4px 10px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  transition: color 160ms var(--ease);
}

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

.page-faq .faq-item__head:hover .faq-item__q,
.page-faq .faq-item__head:focus-visible .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item__head:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item__id {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  padding-top: 4px;
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.005em;
  color: var(--title);
  transition: color 160ms var(--ease);
}

.page-faq .faq-item__dot {
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  border: 1px solid var(--faq-rule);
  background: transparent;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__dot {
  background-color: var(--turf);
  border-color: var(--turf);
  box-shadow: 0 0 0 4px rgba(79, 174, 99, 0.16);
}

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

.page-faq .faq-item__body {
  padding: 0 0 22px;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.34);
  transition: border-color 160ms var(--ease);
}

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

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-fade 240ms var(--ease) both;
}

@keyframes faq-fade {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 分区之间的视觉停顿 ---------- */
.page-faq .faq-break {
  margin: clamp(34px, 5vw, 58px) 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-break .media-frame {
  max-width: 340px;
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-break__caption {
  max-width: 46ch;
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.01em;
  color: var(--text);
  opacity: 0.72;
  padding-left: 12px;
  border-left: 2px solid var(--faq-rule);
}

/* ---------- 页尾引导条 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--faq-rule);
  border-bottom: 1px solid var(--faq-rule);
  background:
    linear-gradient(96deg, rgba(43, 15, 26, 0.55) 0%, rgba(14, 31, 51, 0.72) 58%, rgba(6, 24, 18, 0.9) 100%);
  padding: clamp(34px, 5vw, 58px) 0;
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 22px;
}

.page-faq .faq-cta__title {
  margin: 8px 0 12px;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--title);
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-item__head {
    grid-template-columns: 60px minmax(0, 1fr) 16px;
    gap: 4px 16px;
    padding: 20px 0;
  }

  .page-faq .faq-item__body {
    padding: 0 0 24px 76px;
  }

  .page-faq .faq-break {
    grid-template-columns: 340px minmax(0, 1fr);
    align-items: end;
    gap: 24px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail__sticky {
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-rail__scroll {
    max-height: calc(100vh - 168px);
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 40px;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__body {
    animation: none;
  }

  .page-faq .faq-rail__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__dot,
  .page-faq .faq-item__head {
    transition: none;
  }
}
<<<END>>>