.page-faq {
  --faq-line: var(--db-hairline);
  --faq-line-soft: var(--db-hairline-soft);
  --faq-radius: var(--db-radius);
  color: var(--db-text);
  padding-bottom: 64px;
}

.page-faq .faq-hero {
  padding: 18px 0 34px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__title {
  margin: 12px 0 16px;
  font-size: clamp(26px, 6vw, 44px);
  line-height: 1.2;
  letter-spacing: 0.03em;
  font-weight: 900;
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--db-text-soft);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--db-copper-500);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--db-muted);
}

.page-faq .faq-stat strong {
  font-family: var(--db-mono);
  font-size: 19px;
  font-weight: 600;
  line-height: 1;
  color: var(--db-text);
}

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 34px;
}

/* 竖向锚点栏 */
.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--db-copper-300);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  font-size: 13px;
  color: var(--db-text-soft);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--db-cyan-400);
  border-color: var(--db-cyan-400);
  background: var(--db-ink-800);
}

.page-faq .faq-rail__idx {
  font-family: var(--db-mono);
  font-size: 11px;
  color: var(--db-copper-500);
}

/* 章节画板 */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-block {
  padding-top: 30px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-block + .faq-block {
  margin-top: 52px;
}

.page-faq .faq-block .db-section__title {
  margin: 10px 0 12px;
  font-size: clamp(21px, 4vw, 28px);
  line-height: 1.34;
  letter-spacing: 0.02em;
  font-weight: 800;
}

.page-faq .faq-block .db-section__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--db-text-soft);
}

/* 分类卡片：非对称错层网格 */
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-cat {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 18px 16px;
  background: var(--db-ink-800);
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  box-shadow: var(--db-shadow-1);
  color: inherit;
  text-decoration: none;
  transition: transform 200ms ease, border-color 200ms ease, background 200ms ease, box-shadow 200ms ease;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-3px);
  background: var(--db-ink-700);
  border-color: var(--db-copper-500);
  box-shadow: var(--db-shadow-2);
}

.page-faq .faq-cat__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-faq .faq-cat__num {
  font-family: var(--db-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--db-copper-300);
}

.page-faq .faq-cat__count {
  font-family: var(--db-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--db-cyan-400);
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  padding: 2px 9px;
}

.page-faq .faq-cat__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--db-text);
}

.page-faq .faq-cat__sym {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--db-text-soft);
}

.page-faq .faq-cat__meta {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed var(--faq-line-soft);
  font-family: var(--db-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--db-muted);
}

/* 步骤 */
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  background: var(--db-ink-800);
  border: 1px solid var(--faq-line-soft);
  border-left: 2px solid var(--db-copper-500);
  border-radius: var(--faq-radius);
}

.page-faq .faq-step__num {
  font-family: var(--db-mono);
  font-size: 20px;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--db-copper-300);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--db-text);
}

.page-faq .faq-step__check {
  margin: 8px 0 0;
  font-family: var(--db-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--db-cyan-400);
}

.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--db-cyan-400);
  background: var(--db-ink-800);
  font-size: 13px;
  line-height: 1.75;
  color: var(--db-text-soft);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  background: var(--db-ink-800);
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-family: var(--db-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--db-muted);
}

/* 电脑端分档 */
.page-faq .faq-tiers {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-tier {
  padding: 15px 16px 16px;
  background: var(--db-teal-700);
  border: 1px solid rgba(232, 238, 245, 0.14);
  border-radius: var(--faq-radius);
}

.page-faq .faq-tier__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(244, 241, 234, 0.3);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--db-paper);
  opacity: 0.9;
}

.page-faq .faq-tier__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--db-paper);
}

.page-faq .faq-warn {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--db-amber-400);
  background: rgba(242, 179, 61, 0.09);
  border-radius: var(--faq-radius);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--db-text-soft);
}

/* 清单 */
.page-faq .faq-checklist {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--db-text-soft);
}

.page-faq .faq-checklist li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 10px;
  background: var(--db-cyan-400);
  border-radius: 1px;
}

.page-faq .faq-link {
  color: var(--db-copper-300);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 160ms ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--db-cyan-400);
}

/* 折叠面板 */
.page-faq .faq-fold {
  margin-top: 12px;
  background: var(--db-ink-800);
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color 180ms ease;
}

.page-faq .faq-fold[open] {
  border-color: rgba(200, 112, 47, 0.5);
}

.page-faq .faq-fold__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--db-text);
  transition: background 180ms ease;
}

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

.page-faq .faq-fold__head:hover {
  background: var(--db-ink-700);
}

.page-faq .faq-fold__badge {
  flex: 0 0 auto;
  padding: 1px 8px;
  border-radius: 2px;
  background: var(--db-copper-500);
  font-family: var(--db-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.1em;
  color: var(--db-ink-900);
  transition: background 180ms ease;
}

.page-faq .faq-fold[open] .faq-fold__badge {
  background: var(--db-cyan-400);
}

.page-faq .faq-fold__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-fold__text {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--db-text);
}

.page-faq .faq-fold__meta {
  margin: 12px 0 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-fold__meta dt {
  margin-top: 8px;
  font-family: var(--db-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--db-copper-300);
}

.page-faq .faq-fold__meta dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--db-text-soft);
}

/* 人工求助 */
.page-faq .faq-contact {
  margin-top: 26px;
  padding: 20px 18px;
  background: var(--db-ink-700);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--db-copper-500);
  border-radius: var(--faq-radius);
  box-shadow: var(--db-shadow-1);
}

.page-faq .faq-contact__label {
  margin: 0 0 6px;
  font-family: var(--db-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--db-muted);
}

.page-faq .faq-contact__mail {
  margin: 0 0 12px;
  font-family: var(--db-mono);
  font-size: clamp(15px, 3.6vw, 19px);
  letter-spacing: 0.02em;
  color: var(--db-copper-300);
  word-break: break-all;
}

.page-faq .faq-contact__text {
  margin: 0 0 18px;
  max-width: 56ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--db-text-soft);
}

/* 媒体查询：平板及以上 */
@media (min-width: 640px) {
  .page-faq .faq-cat--a { grid-column: span 7; }
  .page-faq .faq-cat--b { grid-column: span 5; }
  .page-faq .faq-cat--c { grid-column: span 4; }
  .page-faq .faq-cat--d { grid-column: span 8; }
  .page-faq .faq-cat--e { grid-column: span 6; }
  .page-faq .faq-cat--f { grid-column: span 6; }

  .page-faq .faq-contact {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

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

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-rail__list li {
    margin: 0;
  }

  .page-faq .faq-rail__link {
    position: relative;
    display: flex;
    white-space: normal;
    padding: 9px 6px 9px 14px;
    border: 0;
    border-radius: 0;
    line-height: 1.45;
    background: transparent;
  }

  .page-faq .faq-rail__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: transparent;
    transition: background 180ms ease;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: transparent;
    color: var(--db-cyan-400);
  }

  .page-faq .faq-rail__link:hover::before,
  .page-faq .faq-rail__link:focus-visible::before {
    background: var(--db-cyan-400);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-split {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-faq .faq-figure--side {
    margin-top: 24px;
  }

  .page-faq .faq-figure--side img {
    aspect-ratio: 5 / 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-rail__link,
  .page-faq .faq-fold,
  .page-faq .faq-fold__head,
  .page-faq .faq-fold__badge,
  .page-faq .faq-link {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-visible {
    transform: none;
  }
}
<<<END>>>