.page-faq {
  --faq-pad: 20px;
  --faq-gap: 12px;
  background: var(--pitch);
  color: var(--mist);
  font-family: var(--sans);
  line-height: 1.7;
  padding-bottom: 72px;
}

/* ---------- 首屏主题声明 ---------- */
.page-faq .faq-hero {
  padding: 24px var(--faq-pad) 26px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(130% 100% at 92% -10%, rgba(198, 255, 61, 0.09), transparent 58%),
    var(--pitch);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 0 0 14px;
  font-size: 26px;
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  margin: 0 0 24px;
  max-width: 46em;
  font-size: 15px;
  color: var(--grey);
}

.page-faq .faq-hero__metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--faq-gap);
}

.page-faq .faq-hero__metric {
  border: 1px solid var(--line);
  background: var(--stand);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-hero__num {
  font-size: 30px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

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

/* ---------- 骨架：移动端单列 ---------- */
.page-faq .faq-shell {
  display: block;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--faq-pad);
}

/* ---------- 左侧分类锚点 ---------- */
.page-faq .faq-rail {
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-rail .rail__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--stand);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 120ms ease, color 120ms ease, background-color 120ms ease;
}

.page-faq .faq-rail__num {
  font-size: 11px;
  color: var(--grey);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  outline: none;
}

.page-faq .faq-rail__link.is-active {
  border-color: var(--lime);
  background: var(--lime-mist);
  color: var(--lime);
}

.page-faq .faq-rail__link.is-active .faq-rail__num {
  color: var(--lime);
}

.page-faq .faq-rail__aside {
  border: 1px solid var(--line);
  border-left: 2px solid var(--lime);
  background: var(--stand);
  padding: 12px 14px;
}

.page-faq .faq-rail__aside-title {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-rail__aside-mail {
  margin: 0 0 6px;
  font-size: 12.5px;
  color: var(--lime);
  word-break: break-all;
}

.page-faq .faq-rail__aside-note {
  margin: 0;
  font-size: 12px;
  color: var(--grey);
}

/* ---------- 章节 ---------- */
.page-faq .faq-content {
  min-width: 0;
  padding-top: 28px;
}

.page-faq .faq-section {
  padding-bottom: 44px;
  scroll-margin-top: 104px;
}

.page-faq .faq-section + .faq-section {
  border-top: 1px solid var(--line);
  padding-top: 34px;
}

.page-faq .faq-section__head {
  margin-bottom: 20px;
}

.page-faq .faq-section__head .section__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
  margin-bottom: 6px;
}

.page-faq .faq-section__head .section__title {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--mist);
}

.page-faq .faq-section__head .section__sub {
  margin: 0;
  font-size: 14px;
  color: var(--grey);
  max-width: 52em;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 30px 15px 12px;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 500;
  color: var(--mist);
  transition: color 120ms ease, background-color 120ms ease;
}

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

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--grey);
  border-bottom: 1.5px solid var(--grey);
  transform: rotate(45deg);
  transition: transform 120ms ease, border-color 120ms ease;
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item[open] > .faq-item__q {
  color: var(--lime);
  background: var(--lime-mist);
}

.page-faq .faq-item__q:hover::after,
.page-faq .faq-item__q:focus-visible::after {
  border-color: var(--lime);
}

.page-faq .faq-item__q:focus-visible {
  outline: 1px solid var(--lime);
  outline-offset: -1px;
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}

.page-faq .faq-item[open] > .faq-item__q .faq-item__num {
  color: var(--lime);
}

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

.page-faq .faq-item__a {
  padding: 4px 30px 20px 44px;
  font-size: 14.5px;
  color: var(--grey);
  background: var(--stand);
  border-left: 1px solid var(--line);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  transition: border-color 120ms ease;
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  border-bottom-color: var(--lime);
  outline: none;
}

/* ---------- 三步流程条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-steps__item {
  position: relative;
  border: 1px solid var(--line);
  background: var(--stand);
  padding: 16px 16px 18px;
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--lime);
  opacity: 0.55;
}

.page-faq .faq-steps__idx {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lime);
  margin-bottom: 8px;
}

.page-faq .faq-steps__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14px;
  color: var(--grey);
}

/* ---------- 图文 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--stand);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--grey);
  letter-spacing: 0.02em;
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

.page-faq .faq-split__main {
  min-width: 0;
}

.page-faq .faq-figure--portrait {
  margin: 0;
  max-width: 340px;
}

.page-faq .faq-figure--portrait img {
  aspect-ratio: 9 / 16;
}

/* ---------- 数据表 ---------- */
.page-faq .faq-table-wrap {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  background: var(--stand);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table__caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-table thead th {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lime);
  font-weight: 500;
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  color: var(--mist);
  font-weight: 500;
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  color: var(--grey);
}

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: none;
}

/* ---------- 版本提示 ---------- */
.page-faq .faq-callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  background: var(--lime-mist);
  padding: 16px 18px;
  margin-bottom: 22px;
}

.page-faq .faq-callout__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  color: var(--mist);
}

/* ---------- 分流通道 ---------- */
.page-faq .faq-routes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-bottom: 22px;
}

.page-faq .faq-route {
  position: relative;
  border: 1px solid var(--line);
  background: var(--stand);
  padding: 18px 16px;
}

.page-faq .faq-route__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
  display: inline-block;
  border: 1px solid var(--line);
  padding: 3px 8px;
}

.page-faq .faq-route__tag.tag--orange {
  color: var(--orange);
  border-color: rgba(255, 106, 43, 0.45);
}

.page-faq .faq-route__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
}

.page-faq .faq-route p {
  margin: 0;
  font-size: 14px;
  color: var(--grey);
}

.page-faq .faq-route__mail {
  color: var(--mist);
  word-break: break-all;
}

/* ---------- 收尾行动 ---------- */
.page-faq .faq-cta {
  border: 1px solid var(--line);
  background: var(--stand);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .faq-cta__text {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

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

.page-faq .faq-footnote {
  margin: 18px 0 0;
  font-size: 12.5px;
  color: var(--grey);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq {
    --faq-pad: 28px;
  }

  .page-faq .faq-hero {
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .page-faq .faq-hero__title {
    font-size: 32px;
  }

  .page-faq .faq-hero__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-routes .faq-route:first-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --faq-gap: 14px;
  }

  .page-faq .faq-hero {
    padding-left: calc(var(--faq-pad) + 4px);
    padding-right: calc(var(--faq-pad) + 4px);
  }

  .page-faq .faq-hero__title {
    font-size: 36px;
  }

  .page-faq .faq-hero__lede {
    font-size: 16px;
  }

  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
    padding: 0 var(--faq-pad) 0 calc(var(--faq-pad) + 4px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--frame-h) + 16px);
    align-self: start;
    max-height: calc(100vh - var(--frame-h) - 32px);
    overflow-y: auto;
    padding: 30px 0 0;
    border-bottom: none;
    border-right: 1px solid var(--line);
    padding-right: 20px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow-x: visible;
    gap: 4px;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    border-color: transparent;
    background: transparent;
    padding: 9px 10px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: var(--line);
    background: var(--stand);
  }

  .page-faq .faq-rail__link.is-active {
    border-color: var(--lime);
    background: var(--lime-mist);
  }

  .page-faq .faq-content {
    padding-top: 30px;
  }

  .page-faq .faq-section__head .section__title {
    font-size: 26px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
  }

  .page-faq .faq-item__q {
    padding-left: 16px;
    padding-right: 34px;
  }

  .page-faq .faq-item__a {
    padding-left: 52px;
    padding-right: 40px;
  }

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

  .page-faq .faq-routes .faq-route:first-child {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-inline-link {
    transition: none;
  }
}
<<<END>>>
</main>