.page-faq {
  --faq-gap: clamp(1.75rem, 4vw, 3.5rem);
  --faq-ink: var(--ink-900);
  background: var(--paper-50);
  color: var(--ink-900);
}

/* 面包屑行 */
.page-faq .faq-crumb-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.15rem 0;
}

/* 首屏分屏 */
.page-faq .faq-hero {
  border-top: var(--line) solid var(--ink-900);
  border-bottom: var(--line) solid var(--ink-900);
  background: linear-gradient(180deg, var(--paper-50) 0%, var(--paper-100) 100%);
  padding: var(--faq-gap) 0;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.4vw, 3.1rem);
  line-height: 1.28;
  letter-spacing: 0.01em;
  margin: 0.6rem 0 1rem;
}

.page-faq .faq-lead {
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate-700);
  margin: 0 0 1.5rem;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.page-faq .faq-text-link {
  font-family: var(--font-label);
  font-size: 0.9375rem;
  letter-spacing: 0.03em;
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 2px solid var(--clay-500);
  padding-bottom: 2px;
}

.page-faq .faq-text-link:hover,
.page-faq .faq-text-link:focus-visible {
  color: var(--clay-500);
}

/* 首屏右侧状态板 */
.page-faq .faq-hero-visual {
  border: var(--line) solid var(--ink-900);
  background: var(--ink-900);
  color: var(--paper-50);
  box-shadow: var(--shadow-hard);
  padding: 1.25rem 1.25rem 1.1rem;
}

.page-faq .visual-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(251, 249, 245, 0.28);
}

.page-faq .visual-head-title {
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--paper-50);
}

.page-faq .visual-beat {
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--card-yellow);
}

.page-faq .visual-rows {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

.page-faq .visual-row {
  display: grid;
  grid-template-columns: 0.6rem 3.6rem minmax(0, 1fr);
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0;
  border-bottom: 1px dashed rgba(251, 249, 245, 0.16);
}

.page-faq .visual-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  display: block;
}

.page-faq .is-live .visual-dot { background: var(--signal-green); }
.page-faq .is-lag .visual-dot { background: var(--card-yellow); }
.page-faq .is-pause .visual-dot { background: var(--card-red); }

.page-faq .visual-label {
  font-family: var(--font-label);
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
}

.page-faq .visual-desc {
  font-size: 0.875rem;
  color: rgba(251, 249, 245, 0.72);
}

.page-faq .visual-foot {
  margin: 1rem 0 0;
  font-size: 0.8125rem;
  color: rgba(251, 249, 245, 0.72);
}

/* 场景快速定位 */
.page-faq .faq-scenes {
  border-bottom: var(--line) solid var(--stone-300);
  padding: var(--faq-gap) 0;
}

.page-faq .scenes-head {
  margin-bottom: 1.5rem;
}

.page-faq .scenes-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  margin: 0 0 0.4rem;
}

.page-faq .scenes-head p {
  margin: 0;
  color: var(--slate-700);
  font-size: 0.9375rem;
}

.page-faq .scene-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(230px, 76%);
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  scroll-snap-type: x mandatory;
}

.page-faq .scene-card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  border: var(--line) solid var(--ink-900);
  background: var(--paper-100);
  box-shadow: var(--shadow-hard-sm);
  padding: 1.1rem 1rem 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: transform var(--motion), box-shadow var(--motion);
}

.page-faq .scene-card:hover,
.page-faq .scene-card:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-faq .scene-index {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--clay-500);
}

.page-faq .scene-title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-faq .scene-desc {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--slate-700);
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  gap: 2rem;
  padding: var(--faq-gap) 0;
}

/* 左栏索引 */
.page-faq .faq-index {
  border: var(--line) solid var(--ink-900);
  background: var(--paper-100);
  padding: 1rem 0.9rem 1.1rem;
}

.page-faq .index-head {
  margin: 0 0 0.75rem;
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--slate-700);
}

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

.page-faq .index-link {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.4rem;
  border-left: 3px solid transparent;
  text-decoration: none;
  color: var(--slate-700);
  font-size: 0.9375rem;
  transition: color var(--motion), border-color var(--motion), background var(--motion);
}

.page-faq .index-link:hover,
.page-faq .index-link:focus-visible {
  color: var(--ink-900);
  border-left-color: var(--clay-500);
  background: var(--paper-50);
}

.page-faq .index-num {
  font-size: 0.8125rem;
  color: var(--clay-500);
}

.page-faq .index-foot {
  margin: 1.1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--stone-300);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--slate-700);
  word-break: break-all;
}

/* 章节 */
.page-faq .faq-chapters {
  min-width: 0;
}

.page-faq .faq-chapter {
  scroll-margin-top: 6rem;
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.page-faq .faq-chapter + .faq-chapter {
  border-top: var(--line) solid var(--stone-300);
  padding-top: clamp(2rem, 4vw, 3rem);
}

.page-faq .section-num {
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--stone-300);
  transition: color var(--motion);
}

.page-faq [data-section][data-active] .section-num {
  color: var(--clay-500);
}

.page-faq .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin-bottom: 1.4rem;
}

.page-faq .chapter-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.8vw, 1.95rem);
  line-height: 1.35;
  margin: 0.25rem 0 0.5rem;
}

.page-faq .chapter-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--slate-700);
}

/* 插图 */
.page-faq .faq-figure {
  margin: 0 0 1.5rem;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: var(--line) solid var(--ink-900);
  box-shadow: var(--shadow-hard-sm);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--slate-700);
  border-left: 3px solid var(--clay-500);
  padding-left: 0.65rem;
}

/* 折叠问答 */
.page-faq .qa {
  border: var(--line) solid var(--ink-900);
  border-left-width: 6px;
  border-left-color: var(--stone-300);
  background: var(--paper-100);
  margin-bottom: 0.85rem;
  transition: border-left-color var(--motion), box-shadow var(--motion);
}

.page-faq .qa[open] {
  border-left-color: var(--clay-500);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .qa > summary {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.05rem;
}

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

.page-faq .qa > summary::after {
  content: "+";
  font-family: var(--font-num);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--clay-500);
}

.page-faq .qa[open] > summary::after {
  content: "–";
}

.page-faq .qa-q {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
}

.page-faq .qa-body {
  padding: 0 1.05rem 1.15rem;
  border-top: 1px dashed var(--stone-300);
}

.page-faq .steps {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
}

.page-faq .steps li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  padding: 0.4rem 0;
}

.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--clay-500);
  color: var(--paper-50);
  font-size: 0.75rem;
  line-height: 1;
}

.page-faq .step-text {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink-900);
}

.page-faq .qa-more {
  display: inline-block;
  margin-top: 0.9rem;
  font-size: 0.875rem;
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 2px solid var(--card-red);
  padding-bottom: 1px;
}

.page-faq .qa-more:hover,
.page-faq .qa-more:focus-visible {
  color: var(--card-red);
}

/* 联系区 */
.page-faq .faq-reach {
  scroll-margin-top: 6rem;
  border-top: var(--line) solid var(--ink-900);
  background: var(--ink-900);
  color: var(--paper-50);
  padding: var(--faq-gap) 0;
}

.page-faq .reach-grid {
  display: grid;
  gap: 2rem;
}

.page-faq .eyebrow-inverse {
  color: var(--card-yellow);
}

.page-faq .reach-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  line-height: 1.35;
  margin: 0.4rem 0 0.9rem;
  color: var(--paper-50);
}

.page-faq .reach-copy p {
  max-width: 52ch;
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(251, 249, 245, 0.76);
}

.page-faq .reach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .reach-list li {
  display: grid;
  gap: 0.25rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dashed rgba(251, 249, 245, 0.22);
}

.page-faq .reach-label {
  font-family: var(--font-label);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--card-yellow);
}

.page-faq .reach-value {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--paper-50);
  word-break: break-word;
}

/* 响应式 */
@media (min-width: 700px) {
  .page-faq .reach-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3rem;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-faq .scene-rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
    padding-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .scene-card,
  .page-faq .index-link,
  .page-faq .qa,
  .page-faq .section-num {
    transition: none;
  }

  .page-faq .scene-card:hover,
  .page-faq .scene-card:focus-visible {
    transform: none;
  }
}