.page-faq {
  --faq-alt: #E7EDF8;
  --faq-gap: clamp(56px, 8vw, 108px);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 刊头 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 5vw, 68px) 0 clamp(44px, 6vw, 84px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(34, 224, 214, .12), transparent 62%),
    var(--indigo-900);
  color: var(--on-dark);
  border-bottom: 1px solid var(--line-cyan);
}

.page-faq .faq-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 13px;
  letter-spacing: .02em;
}

.page-faq .faq-hero .breadcrumbs__item {
  color: var(--on-dark-muted);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-dark);
}

.page-faq .faq-hero a.breadcrumbs__item:hover {
  color: var(--cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 22ch;
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.01em;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  max-width: 42em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--on-dark-muted);
}

/* 问句索引 */
.page-faq .q-index {
  margin-top: clamp(26px, 3.5vw, 42px);
  border-top: 1px solid var(--line-dark);
}

.page-faq .q-index__link {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line-dark);
  color: var(--on-dark);
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 600;
  line-height: 1.55;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .q-index__link:hover,
.page-faq .q-index__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  background: rgba(34, 224, 214, .06);
}

.page-faq .q-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .q-index__mark {
  display: none;
  justify-self: end;
  color: var(--on-dark-muted);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-faq .q-index__link:hover .q-index__mark {
  transform: translateX(3px);
  color: var(--cyan);
}

/* 右侧图与状态面板 */
.page-faq .faq-hero__figure {
  margin: 0;
}

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

.page-faq .faq-hero__figure .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--on-dark-muted);
}

.page-faq .faq-hero__panel {
  margin-top: 22px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--indigo-800);
  border: 1px solid var(--line-cyan);
}

.page-faq .faq-hero__panel .eyebrow {
  color: var(--on-dark-muted);
}

.page-faq .faq-stat {
  display: grid;
  gap: 14px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stat li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stat li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .faq-stat__unit {
  font-size: 13px;
  color: var(--on-dark-muted);
}

.page-faq .faq-stat__label {
  flex-basis: 100%;
  font-size: 13px;
  line-height: 1.65;
  color: var(--on-dark-muted);
}

/* ---------- 短答清单 ---------- */
.page-faq .faq-quick {
  padding: var(--faq-gap) 0;
  background: var(--paper);
}

.page-faq .quick-list {
  margin: clamp(22px, 3vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-faq .quick-list__row {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

.page-faq .quick-list__row .tag {
  justify-self: start;
}

.page-faq .quick-list__text {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .quick-list__more {
  justify-self: start;
  font-size: 14px;
  color: var(--violet);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .quick-list__more:hover,
.page-faq .quick-list__more:focus-visible {
  color: var(--orange-ink);
  border-bottom-color: currentColor;
}

/* ---------- 主题问答块 ---------- */
.page-faq .faq-block {
  padding: clamp(44px, 6vw, 78px) 0;
}

.page-faq .faq-block--alt {
  background: var(--faq-alt);
}

.page-faq .faq-block__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
}

.page-faq .faq-rail {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--on-dark);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: .08em;
}

.page-faq .faq-rail__label {
  font-size: 13px;
  letter-spacing: .18em;
  color: rgba(233, 238, 249, .82);
}

.page-faq .faq-block--teal .faq-rail {
  background: var(--teal);
}

.page-faq .faq-block--violet .faq-rail {
  background: var(--violet);
}

.page-faq .faq-block--wine .faq-rail {
  background: var(--wine);
}

.page-faq .faq-block--deep .faq-rail {
  background: var(--indigo-700);
}

.page-faq .faq-body__title {
  margin: 0 0 clamp(14px, 2vw, 24px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 900;
  letter-spacing: -.01em;
}

/* 折叠问答 */
.page-faq .qa {
  padding-left: clamp(12px, 1.6vw, 20px);
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--hair);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--orange);
  background: rgba(255, 122, 61, .05);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color .18s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.4;
  color: var(--muted);
  transition: color .18s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
  color: var(--orange-ink);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

.page-faq .qa__body {
  max-width: 46em;
  padding: 0 0 20px;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

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

.page-faq .qa__body a {
  color: var(--violet);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--orange-ink);
  border-bottom-color: currentColor;
}

.source-panel,
.page-faq .qa__body .mono {
  font-family: var(--font-mono);
  letter-spacing: .01em;
}

/* 章节内配图 */
.page-faq .faq-figure {
  margin: clamp(18px, 2.6vw, 30px) 0;
}

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

.page-faq .faq-figure .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--muted);
}

/* 深色收尾块 */
.page-faq .faq-block--deep {
  background: var(--indigo-900);
  color: var(--on-dark);
}

.page-faq .faq-block--deep .faq-body__title {
  color: var(--on-dark);
  border-bottom-color: var(--line-dark);
}

.page-faq .faq-block--deep .qa {
  border-bottom-color: var(--line-dark);
}

.page-faq .faq-block--deep .qa[open] {
  border-left-color: var(--cyan);
  background: rgba(34, 224, 214, .07);
}

.page-faq .faq-block--deep .qa__q {
  color: var(--on-dark);
}

.page-faq .faq-block--deep .qa__q:hover,
.page-faq .faq-block--deep .qa__q:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-block--deep .qa[open] .qa__q::after {
  color: var(--cyan);
}

.page-faq .faq-block--deep .qa__body p {
  color: var(--on-dark-muted);
}

.page-faq .faq-block--deep .qa__body .mono {
  color: var(--cyan);
}

.page-faq .faq-block--deep .qa__body a {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

.page-faq .faq-block--deep .qa__body a:hover,
.page-faq .faq-block--deep .qa__body a:focus-visible {
  color: var(--orange);
  border-bottom-color: currentColor;
}

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .faq-cta .btn--ghost {
  color: var(--on-dark);
  border-color: var(--line-dark);
}

.page-faq .faq-cta .btn--ghost:hover,
.page-faq .faq-cta .btn--ghost:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-cta__note {
  flex-basis: 100%;
  margin: 0;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--on-dark-muted);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 720px) {
  .page-faq .q-index__link {
    grid-template-columns: 2.8rem minmax(0, 1fr) 1.4rem;
    gap: 14px;
    padding: 15px 4px;
  }

  .page-faq .q-index__mark {
    display: block;
  }

  .page-faq .quick-list__row {
    grid-template-columns: 6.5rem minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 22px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .78fr);
    align-items: start;
    gap: clamp(40px, 5vw, 68px);
  }

  .page-faq .faq-block__inner {
    grid-template-columns: clamp(76px, 8vw, 104px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: stretch;
  }

  .page-faq .faq-rail {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 18px;
    padding: 22px 16px;
    min-height: 100%;
  }

  .page-faq .faq-rail__num {
    font-size: clamp(18px, 2vw, 24px);
  }

  .page-faq .faq-rail__label {
    writing-mode: vertical-rl;
    letter-spacing: .22em;
    line-height: 1;
  }
}