.page-faq {
  --faq-sticky: 92px;
  --faq-ring: 0 0 0 1px var(--line);
}

/* ——— 面包屑 ——— */
.page-faq .page-faq__crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: clamp(16px, 3vw, 26px) 0 0;
  font-size: 13px;
  color: var(--steel);
}

.page-faq .breadcrumbs__link {
  color: var(--steel);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .breadcrumbs__link:hover {
  color: var(--cyan);
}

.page-faq .breadcrumbs__sep {
  color: var(--line);
}

.page-faq .breadcrumbs__current {
  color: var(--paper);
}

/* ——— 页头 ——— */
.page-faq .page-head {
  padding-block: clamp(20px, 3.4vw, 40px) clamp(26px, 4vw, 44px);
}

.page-faq .page-head__title {
  margin: 12px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--paper);
}

.page-faq .page-head__lede {
  margin-top: 18px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

/* ——— 主体两栏 ——— */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 244px) minmax(0, 1fr);
    align-items: start;
  }
}

/* ——— 左侧主题索引 ——— */
.page-faq .topic-index {
  align-self: start;
  border-top: 2px solid var(--cyan);
  padding-top: 16px;
}

.page-faq .topic-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .topic-index__nav {
  display: flex;
  flex-direction: column;
}

.page-faq .topic-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 4px 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .22s var(--ease), transform .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .topic-index__link .mono {
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--orange);
}

.page-faq .topic-index__link:hover,
.page-faq .topic-index__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateX(3px);
}

.page-faq .topic-index__help {
  margin-top: 26px;
  padding: 18px 18px 20px;
  background: var(--lift);
  border-left: 3px solid var(--archive);
}

.page-faq .topic-index__help-title {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--archive);
}

.page-faq .topic-index__help-text {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--paper);
  word-break: break-word;
}

@media (min-width: 900px) {
  .page-faq .topic-index {
    position: sticky;
    top: var(--faq-sticky);
  }
}

/* ——— 分组 ——— */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--faq-sticky) + 18px);
  padding-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 6vw, 72px);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.page-faq .faq-group__no {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 2.05rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--steel);
}

/* ——— 图 ——— */
.page-faq .figure {
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.page-faq .figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .figure--inset {
  margin-block: clamp(18px, 2.4vw, 26px);
}

.page-faq .figure--inset .figure__frame {
  max-width: 640px;
}

/* ——— 四步流程 ——— */
.page-faq .step-flow {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 30px);
  padding: 0;
}

.page-faq .step-flow__item {
  position: relative;
  margin-left: 15px;
  padding: 0 0 24px 40px;
  border-left: 1px solid var(--line);
}

.page-faq .step-flow__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-faq .step-flow__no {
  position: absolute;
  left: -16px;
  top: -2px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--ink);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .step-flow__title {
  margin: 0 0 5px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .step-flow__text {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--steel);
}

.page-faq .step-flow__expect {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--archive);
}

/* ——— 手风琴容器间距 ——— */
.page-faq .accordion {
  margin-top: clamp(14px, 2vw, 22px);
  border-top: 1px solid var(--line);
}

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

/* ——— 术语卡 ——— */
.page-faq .term-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.page-faq .term-card {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--char);
  box-shadow: var(--faq-ring);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .term-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .28s var(--ease);
}

.page-faq .term-card:hover,
.page-faq .term-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 0 0 1px var(--cyan);
  background: var(--lift);
  outline: none;
}

.page-faq .term-card:hover::before,
.page-faq .term-card:focus-visible::before {
  transform: scaleY(1);
}

.page-faq .term-card__name {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .term-card__example {
  margin: 0 0 10px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-faq .term-card__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--steel);
}

/* ——— 结尾 ——— */
.page-faq .faq-outro {
  margin-top: clamp(38px, 6vw, 68px);
  padding: clamp(22px, 3vw, 32px);
  background: var(--lift);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-outro__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-outro__text {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--paper);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-outro__actions .btn {
  flex: 0 0 auto;
}

/* ——— 窄屏收束 ——— */
@media (max-width: 899px) {
  .page-faq {
    --faq-sticky: 76px;
  }

  .page-faq .topic-index {
    border-top-width: 2px;
  }

  .page-faq .topic-index__nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 16px;
  }

  .page-faq .topic-index__link {
    border-bottom: 0;
    padding: 4px 0;
    font-size: 13.5px;
  }

  .page-faq .topic-index__link:hover,
  .page-faq .topic-index__link:focus-visible {
    transform: none;
  }

  .page-faq .topic-index__help {
    margin-top: 20px;
  }

  .page-faq .step-flow__item {
    padding-left: 34px;
  }

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

@media (max-width: 560px) {
  .page-faq .page-head__title {
    max-width: none;
    font-size: clamp(1.75rem, 8vw, 2.3rem);
  }

  .page-faq .step-flow__item {
    margin-left: 13px;
    padding-left: 28px;
  }

  .page-faq .step-flow__no {
    left: -14px;
    width: 28px;
    height: 28px;
    font-size: 12px;
  }

  .page-faq .faq-outro__actions .btn {
    flex: 1 1 auto;
  }
}