.page-faq {
  --faq-index-w: 232px;
  --faq-rail: calc(var(--header-h) + 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding-top: 26px;
}

.page-faq .faq-intro .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-lead {
  display: grid;
  gap: 22px;
  align-items: end;
}

.page-faq .faq-lead h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-lead__text {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-banner {
  margin: 34px 0 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--panel-2);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-faq .faq-lead {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-questions {
  padding-top: 8px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 30px;
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  border-top: 3px solid var(--cyan);
  padding-top: 14px;
}

.page-faq .faq-index__nav {
  display: flex;
  gap: 4px;
  margin: 12px 0 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__nav::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  border-left: 3px solid transparent;
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--goldline);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
}

.page-faq .faq-index__link.is-active {
  border-left-color: var(--cyan);
  color: var(--text);
}

.page-faq .faq-index__link.is-active .mono {
  color: var(--cyan);
}

.page-faq .faq-index__hint {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  display: none;
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-rail);
    align-self: start;
  }

  .page-faq .faq-index__nav {
    flex-direction: column;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    padding: 10px 12px 10px 14px;
  }

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

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 48px;
  padding-top: 16px;
  border-top: 3px solid var(--accent, var(--cyan));
  scroll-margin-top: var(--faq-rail);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__range {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent, var(--cyan));
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 阶梯示意图 ---------- */
.page-faq .faq-visual {
  margin: 24px 0 6px;
  border: 1px solid var(--line);
  background: var(--panel-2);
}

.page-faq .faq-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-visual .figure__caption {
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-faq .faq-visual {
    max-width: 58%;
    margin-bottom: 12px;
  }
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  margin-top: 22px;
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 24px 44px 24px 0;
  transition: color 160ms var(--ease);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-item__title {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-item > summary:hover .faq-item__title,
.page-faq .faq-item[open] > summary .faq-item__title {
  color: var(--accent, var(--cyan));
}

.page-faq .faq-item__mark {
  position: absolute;
  right: 2px;
  top: 28px;
  width: 16px;
  height: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  transition: border-color 160ms var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
}

.page-faq .faq-item__mark::before {
  left: 3px;
  right: 3px;
  top: 7px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  top: 3px;
  bottom: 3px;
  left: 7px;
  width: 1px;
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--accent, var(--cyan));
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 40px 26px 40px;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item__body p:first-child {
  color: var(--text);
  font-weight: 600;
}

.page-faq .faq-item__link {
  display: inline-block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 210, 0.35);
  transition: border-color 160ms var(--ease);
}

.page-faq .faq-item__link:hover {
  border-bottom-color: var(--cyan);
}

@media (max-width: 520px) {
  .page-faq .faq-item__q {
    gap: 12px;
    padding-right: 36px;
  }

  .page-faq .faq-item__body {
    padding-left: 28px;
    padding-right: 28px;
  }
}

/* ---------- 结尾服务入口 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--line-strong);
  margin-top: 20px;
}

.page-faq .faq-cta__grid {
  row-gap: 34px;
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-cta__text {
  margin: 16px 0 26px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-cta__side {
  border-left: 3px solid var(--gold);
  padding-left: 22px;
}

.page-faq .faq-cta__mail {
  margin: 12px 0 14px;
  font-size: clamp(0.95rem, 2.4vw, 1.15rem);
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-cta__note {
  margin: 16px 0 0;
  max-width: 40ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-faq .faq-cta__grid {
    align-items: start;
  }
}
<<<END>>>