.page-faq {
  --faq-aside: 258px;
  --faq-gap: clamp(26px, 3.6vw, 60px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-block: clamp(22px, 3vw, 36px) clamp(48px, 6.4vw, 92px);
}

.page-faq .breadcrumb {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--slate);
  margin-bottom: clamp(26px, 3.6vw, 46px);
}

.page-faq .breadcrumb a {
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .breadcrumb__sep {
  margin: 0 10px;
  color: var(--line-strong);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .page-head__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--signal);
  margin: 0 0 14px;
}

.page-faq .page-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 4.4vw, 3.35rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink-900);
  margin: 0 0 20px;
  max-width: 20ch;
}

.page-faq .page-head__lede {
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink-700);
  max-width: 60ch;
  margin: 0 0 24px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
}

.page-faq .status-cluster {
  display: inline-flex;
}

.page-faq .faq-hero__jump {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__jump a {
  color: var(--signal-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--orange-100);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-bottom-color: var(--signal);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure .media-frame__inner {
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

/* ---------- 主体：侧栏 + 问答流 ---------- */

.page-faq .faq-body {
  padding-block: clamp(52px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-side {
  border: 1px solid var(--line);
  background: var(--paper-050);
  padding: 20px 18px;
}

.page-faq .faq-side__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
  margin: 24px 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-search {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-search__label {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink-700);
}

.page-faq .faq-search__input {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink-900);
  background: var(--paper-050);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 12px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--slate);
}

.page-faq .faq-search__input:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-color: var(--signal);
}

.page-faq .faq-search__hint {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--slate);
  margin: 0;
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 8px 11px 0;
  text-decoration: none;
  color: var(--ink-700);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  flex: none;
  width: 2px;
  height: 13px;
  background: var(--line-strong);
  transition: background-color 0.22s var(--ease), height 0.22s var(--ease);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  background: var(--signal);
  height: 22px;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--orange-100);
  color: var(--ink-900);
}

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

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--signal);
  flex: none;
}

.page-faq .faq-index__label {
  font-size: 14.5px;
  line-height: 1.45;
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  flex: none;
}

.page-faq .faq-side__note {
  margin-top: 20px;
  padding: 14px 14px 14px 16px;
  border-left: 2px solid var(--mint);
  background: var(--mint-050);
}

.page-faq .faq-side__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--ink-700);
}

/* ---------- 问答分类 ---------- */

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

.page-faq .faq-cat {
  margin-bottom: clamp(44px, 5.2vw, 76px);
}

.page-faq .faq-cat--last {
  margin-bottom: 0;
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink-900);
}

.page-faq .faq-cat__coord {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--signal);
  flex: none;
}

.page-faq .faq-cat__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.5vw, 1.7rem);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--ink-900);
  margin: 0;
}

.page-faq .faq-cat__lede {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
  margin: 14px 0 6px;
  max-width: 62ch;
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q:hover .qa__text {
  color: var(--signal-deep);
}

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

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  padding-top: 4px;
  flex: none;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-900);
  transition: color 0.2s var(--ease);
}

.page-faq .qa__arrow {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  margin-left: 6px;
  border-right: 1.6px solid var(--slate);
  border-bottom: 1.6px solid var(--slate);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .qa[open] .qa__arrow {
  transform: rotate(135deg);
  border-color: var(--signal);
}

.page-faq .qa__a {
  padding: 0 0 20px 32px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-700);
  max-width: 66ch;
  border-left: 2px solid var(--orange-100);
  padding-left: 16px;
}

.page-faq .faq-flow {
  margin: 30px 0 0;
}

.page-faq .faq-flow .media-frame__inner {
  border: 1px solid var(--line);
  background: var(--paper-050);
}

/* ---------- 术语对照 ---------- */

.page-faq .term-grid {
  margin: 20px 0 0;
  padding: 0;
}

.page-faq .term-grid__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .term-grid dt {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--signal-deep);
}

.page-faq .term-grid dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
  max-width: 66ch;
}

/* ---------- 尾段 ---------- */

.page-faq .faq-next {
  padding-block: clamp(52px, 6.5vw, 92px);
}

.page-faq .faq-next__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 52px);
  align-items: center;
  padding: clamp(26px, 3.4vw, 46px);
  background: var(--ink-900);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-next__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--signal);
}

.page-faq .faq-next__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--orange-100);
  margin: 0 0 12px;
}

.page-faq .faq-next__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper-050);
  margin: 0 0 14px;
  max-width: 24ch;
}

.page-faq .faq-next__lede {
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-100);
  margin: 0;
  max-width: 62ch;
}

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

.page-faq .faq-next .btn--ghost {
  color: var(--paper-050);
  border-color: var(--line-dark);
}

.page-faq .faq-next .btn--ghost:hover,
.page-faq .faq-next .btn--ghost:focus-visible {
  border-color: var(--signal);
  color: var(--orange-100);
}

/* ---------- 响应式 ---------- */

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: clamp(36px, 5vw, 76px);
  }

  .page-faq .faq-next__panel {
    grid-template-columns: minmax(0, 1.25fr) auto;
  }

  .page-faq .faq-next__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
  }

  .page-faq .faq-side {
    position: sticky;
    top: 28px;
  }
}

@media (min-width: 760px) {
  .page-faq .term-grid__row {
    grid-template-columns: minmax(120px, 196px) minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

@media (max-width: 560px) {
  .page-faq .qa__a {
    padding-left: 0;
  }

  .page-faq .qa__a p {
    padding-left: 12px;
  }

  .page-faq .faq-cat__head {
    flex-wrap: wrap;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__arrow,
  .page-faq .faq-index__link::before,
  .page-faq .faq-index__link,
  .page-faq .qa__text {
    transition: none;
  }
}