.page-faq {
  --faq-ans-w: 720px;
  --faq-num-w: 44px;
  --faq-pad: 22px;
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .breadcrumb {
  padding-top: 22px;
  padding-bottom: 4px;
}

.page-faq .faq-hero {
  padding-top: 18px;
  padding-bottom: 6px;
}

.page-faq .faq-hero-frame {
  position: relative;
  display: grid;
  gap: 28px;
  padding: 26px 20px 30px;
}

.page-faq .faq-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.page-faq .faq-kicker--dark {
  color: var(--orange);
}

.page-faq .faq-h1-row {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.page-faq .faq-h1 {
  flex: 1 1 auto;
  margin: 14px 0 0;
  font-size: clamp(30px, 8vw, 54px);
  line-height: 1.13;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero-annotation {
  display: none;
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-side {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-faq .faq-side-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--frost);
}

.page-faq .faq-quick {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-quick li {
  display: grid;
  gap: 5px;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}

.page-faq .faq-quick-k {
  font-size: 14px;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .faq-quick-t {
  font-size: 14px;
  line-height: 1.7;
  color: var(--frost);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index-sec {
  padding-top: 44px;
  padding-bottom: 10px;
}

.page-faq .faq-index-panel {
  padding: 32px 20px 36px;
}

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

.page-faq .faq-index-title {
  margin: 14px 0 0;
  font-size: clamp(22px, 5.4vw, 34px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--char);
}

.page-faq .faq-index-lead {
  margin: 16px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-ink);
}

.page-faq .faq-index-link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 2px;
  border-bottom: 1px solid var(--line-ink);
  text-decoration: none;
  color: var(--char);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index-idx {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--frost);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index-name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-index-count {
  font-size: 12px;
  color: var(--ink);
  border: 1px solid var(--line-ink);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--orange);
}

.page-faq .faq-index-link:hover .faq-index-idx,
.page-faq .faq-index-link:focus-visible .faq-index-idx {
  color: var(--orange);
}

.page-faq .faq-index-link:hover .faq-index-count,
.page-faq .faq-index-link:focus-visible .faq-index-count {
  color: var(--orange);
  border-color: var(--orange);
}

.page-faq .faq-index-fig {
  margin: 0;
  display: grid;
  gap: 10px;
}

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

.page-faq .faq-index-cap {
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink);
}

/* ---------- 左侧分类刻度 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 22px;
  padding-top: 30px;
  padding-bottom: 56px;
}

.page-faq .faq-scale {
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-scale-label {
  display: none;
}

.page-faq .faq-scale-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 10px;
}

.page-faq .faq-scale-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-scale-bar {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  flex: 0 0 auto;
  transition: background-color 0.2s var(--ease);
}

.page-faq .faq-scale-link:hover,
.page-faq .faq-scale-link:focus-visible {
  color: var(--paper);
  border-color: var(--orange);
}

.page-faq .faq-scale-link:hover .faq-scale-bar,
.page-faq .faq-scale-link:focus-visible .faq-scale-bar {
  background: var(--orange);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.page-faq .faq-group {
  padding: 26px 20px 10px;
  scroll-margin-top: calc(var(--topbar-h) + 72px);
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-ink);
}

.page-faq .faq-group-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.page-faq .faq-group-dot--a { background: var(--orange); }
.page-faq .faq-group-dot--b { background: var(--cyan); }
.page-faq .faq-group-dot--c { background: var(--amber); }
.page-faq .faq-group-dot--d { background: var(--night); }

.page-faq .faq-group-idx {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--frost);
}

.page-faq .faq-group-title {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(20px, 4.8vw, 28px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.012em;
  color: var(--char);
}

.page-faq .faq-group-count {
  font-size: 12px;
  color: var(--ink);
  border: 1px solid var(--line-ink);
  border-radius: 999px;
  padding: 3px 10px;
}

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

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 22px;
  align-items: start;
  gap: 10px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-num {
  font-size: 13px;
  line-height: 1.95;
  color: var(--frost);
  transition: color 0.22s var(--ease);
}

.page-faq .faq-qt {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--char);
  transition: color 0.22s var(--ease);
}

.page-faq .faq-q:hover .faq-qt,
.page-faq .faq-q:focus-visible .faq-qt {
  color: var(--orange);
}

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

.page-faq .faq-mark {
  position: relative;
  justify-self: end;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--line-ink);
  border-radius: 50%;
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--char);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .faq-mark::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1px;
  margin-top: -0.5px;
}

.page-faq .faq-mark::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1px;
  margin-left: -0.5px;
}

.page-faq .faq-item[open] .faq-mark {
  border-color: var(--orange);
}

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

.page-faq .faq-a {
  max-width: var(--faq-ans-w);
  padding: 0 4px 20px var(--faq-num-w);
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

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

.page-faq .faq-a p + p {
  margin-top: 14px;
}

.page-faq .faq-a a {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-fig {
  margin: 22px 0 8px;
  display: grid;
  gap: 12px;
  justify-items: start;
}

.page-faq .faq-fig img {
  width: 100%;
  max-width: 220px;
  height: auto;
  display: block;
  border: 1px solid var(--line-ink);
  background: var(--night);
  object-fit: cover;
}

.page-faq .faq-fig-cap {
  max-width: 34em;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-tail {
  margin: 6px 0 0;
  padding: 18px 2px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--frost);
}

.page-faq .faq-tail a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-tail a:hover,
.page-faq .faq-tail a:focus-visible {
  color: var(--orange);
}

/* ---------- 宽屏 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-index-grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-index-fig {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }

  .page-faq .faq-index-link {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 16px;
  }

  .page-faq .faq-group {
    padding: 34px 34px 14px;
  }

  .page-faq .faq-q {
    grid-template-columns: 38px minmax(0, 1fr) 24px;
    gap: 14px;
    padding: 20px 2px;
  }

  .page-faq .faq-a {
    padding-left: 52px;
  }

  .page-faq .faq-fig {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: center;
    gap: 26px;
    justify-items: stretch;
    margin-top: 26px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-frame {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
    padding: 40px 44px 44px;
  }

  .page-faq .faq-hero-annotation {
    display: block;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32em;
    color: var(--frost);
    padding-top: 18px;
    flex: 0 0 auto;
  }

  .page-faq .faq-side {
    border-top: none;
    border-left: 1px solid var(--line);
    padding-top: 4px;
    padding-left: 30px;
  }

  .page-faq .faq-index-panel {
    padding: 52px 48px 56px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding-top: 52px;
    padding-bottom: 84px;
  }

  .page-faq .faq-scale {
    position: sticky;
    top: calc(var(--topbar-h) + 40px);
    overflow: visible;
  }

  .page-faq .faq-scale-label {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.3em;
    color: var(--frost);
  }

  .page-faq .faq-scale-list {
    display: grid;
    gap: 0;
    padding: 0;
  }

  .page-faq .faq-scale-link {
    padding: 12px 0;
    border: none;
    border-radius: 0;
    gap: 12px;
    align-items: flex-start;
    font-size: 14px;
    line-height: 1.6;
    color: var(--frost);
  }

  .page-faq .faq-scale-bar {
    width: 1px;
    height: 14px;
    border-radius: 0;
    background: var(--line-strong);
    margin-top: 4px;
    transition: height 0.24s var(--ease), background-color 0.24s var(--ease);
  }

  .page-faq .faq-scale-link:hover,
  .page-faq .faq-scale-link:focus-visible {
    color: var(--paper);
    border-color: transparent;
  }

  .page-faq .faq-scale-link:hover .faq-scale-bar,
  .page-faq .faq-scale-link:focus-visible .faq-scale-bar {
    height: 26px;
  }

  .page-faq .faq-group {
    padding: 40px 44px 16px;
  }

  .page-faq .faq-groups {
    gap: 30px;
  }
}
<<<END>>>