.page-faq {
  padding-block: clamp(1.25rem, 3vw, 2.5rem) clamp(2.5rem, 6vw, 5rem);
  color: var(--text);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(1.5rem, 3.5vw, 2.75rem);
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(0.75rem, 1.4vw, 1.15rem);
  max-width: 58rem;
}

.page-faq .faq-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 44rem;
  font-size: var(--step-6);
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .faq-hero-media {
  margin: clamp(1.75rem, 4vw, 3rem) 0 0;
  border: 1px solid var(--line);
  box-shadow: 10px 10px 0 0 var(--surface-raised);
}

.page-faq .faq-hero-media .media-caption {
  padding: 0.7rem clamp(0.85rem, 2vw, 1.25rem) 0.85rem;
  border-top: 1px solid var(--line-soft);
  font-size: var(--step-2);
  line-height: 1.6;
  color: var(--text-faint);
}

/* ---------- 两栏布局 ---------- */
.page-faq .faq-layout {
  margin-top: clamp(2.75rem, 6vw, 5rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
}

@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--orange);
  padding-top: 1rem;
}

@media (min-width: 920px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-offset) + 1.5rem);
    align-self: start;
  }
}

.page-faq .faq-index-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--print);
}

.page-faq .faq-index-list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.55rem 0.4rem 0.55rem 0;
  font-size: var(--step-4);
  line-height: 1.45;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-index-list a:hover {
  color: var(--paper);
  padding-left: 0.5rem;
  border-bottom-color: var(--orange);
}

.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  color: var(--paper);
}

.page-faq .faq-index-list .num {
  color: var(--orange);
  font-size: var(--step-2);
  letter-spacing: 0.06em;
}

.page-faq .faq-index-note {
  margin: 1.25rem 0 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--line);
  font-size: var(--step-2);
  line-height: 1.65;
  color: var(--text-faint);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-offset) + 1rem);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(2.5rem, 5.5vw, 4.25rem);
}

.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: clamp(0.75rem, 2vw, 1.25rem);
  padding-bottom: 0.85rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section-no {
  flex: none;
  font-size: var(--step-7);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--print);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease),
    box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 0.7rem;
}

.page-faq .qa:hover {
  border-left-color: var(--mist);
}

.page-faq .qa[open] {
  background: var(--surface-raised);
  border-left-color: var(--cyan);
  box-shadow: 7px 7px 0 0 rgba(8, 17, 31, 0.55);
}

.page-faq .qa-sum {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: clamp(0.9rem, 2vw, 1.15rem) clamp(1rem, 2.5vw, 1.5rem);
  font-size: var(--step-5);
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-sum::marker {
  content: "";
}

.page-faq .qa-sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa-mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  margin-top: 0.16rem;
  border: 1px solid var(--print);
  font-family: var(--font-mono);
  font-size: var(--step-3);
  line-height: 1;
  color: var(--text-muted);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq .qa[open] .qa-mark {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .qa[open] .qa-mark::before {
  content: "–";
}

.page-faq .qa-body {
  padding: 0 clamp(1rem, 2.5vw, 1.5rem) clamp(1.1rem, 2.5vw, 1.5rem);
  font-size: var(--step-5);
  line-height: 1.78;
  color: var(--text-muted);
}

.page-faq .qa-body > * + * {
  margin-top: 0.85rem;
}

.page-faq .qa-body p {
  margin: 0;
}

.page-faq .qa-body strong {
  color: var(--paper);
  font-weight: 700;
}

.page-faq .qa-body .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .qa-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-faq .qa-list li {
  position: relative;
  padding-left: 1.15rem;
}

.page-faq .qa-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--orange);
}

/* ---------- 章节配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

.page-faq .faq-figure .media-caption {
  padding: 0.7rem clamp(0.85rem, 2vw, 1.15rem) 0.85rem;
  border-top: 1px solid var(--line-soft);
  font-size: var(--step-2);
  line-height: 1.6;
  color: var(--text-faint);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-help {
  margin-top: clamp(3rem, 7vw, 6rem);
  padding-top: clamp(1.5rem, 3vw, 2.5rem);
  border-top: 2px solid var(--orange);
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
}

@media (min-width: 780px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

.page-faq .faq-help-text {
  display: grid;
  gap: 0.6rem;
  max-width: 38rem;
}

.page-faq .faq-help-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-help-lede {
  margin: 0;
  font-size: var(--step-5);
  line-height: 1.72;
  color: var(--text-muted);
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-help-actions .btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .page-faq .faq-hero-media {
    box-shadow: 6px 6px 0 0 var(--surface-raised);
  }

  .page-faq .qa-sum {
    gap: 0.65rem;
  }

  .page-faq .faq-help-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}