.page-faq {
  --faq-index-w: 210px;
  --faq-gap: 24px;
  --faq-shift: 2px;
  background: var(--ab-paper);
  color: var(--ab-ink);
}

/* ===== 面包屑 ===== */
.page-faq .ab-crumb {
  padding: 18px 0 14px;
  font-size: 13px;
  letter-spacing: .02em;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  padding: 16px 0 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 40px;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 10px;
  font-family: var(--ab-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ab-blue);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-size: 36px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ab-ink);
}

.page-faq .faq-hero__lead {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ab-ink-70);
}

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

.page-faq .faq-chip {
  display: inline-block;
  padding: 5px 14px;
  font-size: 12px;
  letter-spacing: .08em;
  border: 1px solid var(--ab-line);
  color: var(--ab-ink);
}

.page-faq .faq-chip--red {
  border-color: var(--ab-red);
  color: var(--ab-red);
}

.page-faq .faq-chip--blue {
  border-color: var(--ab-blue);
  color: var(--ab-blue);
}

.page-faq .faq-chip--violet {
  border-color: var(--ab-violet);
  color: var(--ab-violet);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  align-self: end;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--ab-line);
}

.page-faq .faq-hero__figcap {
  margin-top: 8px;
  font-size: 13px;
  font-style: italic;
  color: var(--ab-ink-50);
}

.page-faq .faq-hero__rule {
  height: 2px;
  background: linear-gradient(90deg, var(--ab-red) 0%, var(--ab-red) 50%, var(--ab-blue) 50%, var(--ab-blue) 100%);
}

/* ===== 主区骨架 ===== */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 44px;
  padding-bottom: 64px;
}

/* ===== 左侧索引 ===== */
.page-faq .faq-index {
  position: relative;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--ab-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ab-ink-50);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 12px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ab-ink-70);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ab-dur) var(--ab-ease),
              border-color var(--ab-dur) var(--ab-ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--ab-red);
  border-bottom-color: var(--ab-line);
}

.page-faq .faq-index__num {
  font-family: var(--ab-font-mono);
  font-size: 12px;
  color: var(--ab-blue);
  flex: none;
}

.page-faq .faq-index__list a:hover .faq-index__num,
.page-faq .faq-index__list a:focus-visible .faq-index__num {
  color: var(--ab-red);
}

.page-faq .faq-index__txt {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 答案面板 ===== */
.page-faq .faq-body {
  display: grid;
  gap: 52px;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ab-line);
  margin-bottom: 6px;
}

.page-faq .faq-block__index {
  font-family: var(--ab-font-mono);
  font-size: 28px;
  color: var(--ab-ink-50);
  line-height: 1;
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .faq-block__tag {
  margin-left: auto;
  padding: 3px 12px;
  font-size: 11px;
  letter-spacing: .1em;
  border: 1px solid currentColor;
  align-self: center;
}

.page-faq .faq-block__tag--red { color: var(--ab-red); }
.page-faq .faq-block__tag--blue { color: var(--ab-blue); }
.page-faq .faq-block__tag--violet { color: var(--ab-violet); }
.page-faq .faq-block__tag--wine { color: var(--ab-wine); }
.page-faq .faq-block__tag--green { color: var(--ab-green); }

/* ===== 单条问答 ===== */
.page-faq .faq-item {
  border-bottom: 1px solid var(--ab-line);
}

.page-faq .faq-item[open] {
  border-left: 3px solid var(--ab-violet);
  padding-left: 14px;
  margin-left: -17px;
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--ab-dur) var(--ab-ease);
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--ab-blue);
}

.page-faq .faq-item__num {
  font-family: var(--ab-font-mono);
  font-size: 13px;
  color: var(--ab-blue);
  flex: none;
  min-width: 32px;
}

.page-faq .faq-item__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.005em;
}

.page-faq .faq-item__icon {
  margin-left: auto;
  flex: none;
  width: 20px;
  text-align: center;
  font-family: var(--ab-font-mono);
  font-size: 18px;
  color: var(--ab-ink-50);
  transition: transform var(--ab-dur) var(--ab-ease);
}

.page-faq .faq-item__icon::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__icon::before {
  content: "−";
}

.page-faq .faq-item[open] .faq-item__icon {
  color: var(--ab-violet);
}

.page-faq .faq-item__a {
  padding: 0 0 18px 42px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-ink-70);
}

/* ===== 区块内插图 ===== */
.page-faq .faq-figure {
  margin: 24px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--ab-line);
}

.page-faq .faq-figure__cap {
  margin-top: 8px;
  font-size: 13px;
  font-style: italic;
  color: var(--ab-ink-50);
}

/* ===== 求助出口 ===== */
.page-faq .faq-help {
  background: var(--ab-indigo);
  color: var(--ab-paper);
  padding: 52px 0;
}

.page-faq .faq-help__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-faq .faq-help__title {
  margin: 0 0 10px;
  font-size: 24px;
  font-weight: 900;
  color: var(--ab-paper);
}

.page-faq .faq-help__desc {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-paper-65);
  max-width: 56ch;
}

.page-faq .faq-help__mail {
  margin: 0;
  font-family: var(--ab-font-mono);
  font-size: 14px;
  color: var(--ab-amber);
  letter-spacing: .02em;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 桌面栅格 ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--faq-gap);
    align-items: end;
  }

  .page-faq .faq-hero__title {
    font-size: 44px;
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) 1fr;
    gap: 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 32px;
    align-self: start;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: 1fr auto;
    gap: 36px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__title {
    font-size: 52px;
  }

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

  .page-faq .faq-index__list a {
    font-size: 13.5px;
    padding: 4px 0;
  }

  .page-faq .faq-item__a {
    padding-left: 42px;
    max-width: 68ch;
  }

  .page-faq .faq-item__title {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-item__q,
  .page-faq .faq-item__icon {
    transition: none;
  }
}
<<<END>>>