.page-faq {
  --faq-paper: #F4EFE4;
  --faq-paper-2: #EAE2D2;
  --faq-ink: #0A1A2F;
  --faq-muted: #56657A;
  --faq-line: rgba(10, 26, 47, 0.14);
  --faq-copy: rgba(10, 26, 47, 0.82);
  background: var(--faq-paper);
  color: var(--faq-ink);
}

.page-faq .faq-shell {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(18px, 4vw, 36px) var(--gutter) clamp(48px, 7vw, 96px);
}

/* 面包屑 */
.page-faq .crumb {
  color: var(--faq-muted);
  font-size: 12.5px;
}
.page-faq .crumb a {
  color: var(--faq-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .crumb a:hover {
  border-bottom-color: var(--cyan);
}
.page-faq .crumb .crumb-sep {
  margin: 0 8px;
  color: var(--faq-line);
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  margin-top: clamp(18px, 3vw, 30px);
}
.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faq-muted);
  margin: 0 0 14px;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(29px, 5.2vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
  max-width: 20ch;
}
.page-faq .faq-lede {
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--faq-muted);
  margin: 0;
  max-width: 54ch;
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  margin-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-hero-stats .stat {
  flex: 1 1 130px;
  padding: 14px 16px 6px 0;
  display: grid;
  gap: 4px;
}
.page-faq .faq-hero-stats .stat + .stat {
  padding-left: 16px;
  border-left: 1px solid var(--faq-line);
}
.page-faq .stat-figure {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.1;
  color: var(--faq-ink);
  letter-spacing: -0.01em;
}
.page-faq .stat-figure--amber {
  background: linear-gradient(transparent 62%, rgba(255, 183, 51, 0.62) 62%);
}
.page-faq .stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--faq-muted);
}

.page-faq .faq-hero-figure {
  margin: 0;
}
.page-faq .faq-hero-figure .media-frame {
  aspect-ratio: 2 / 3;
}
.page-faq .media-cap {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--faq-muted);
}

/* 章节色带 */
.page-faq .faq-band {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: clamp(34px, 5vw, 56px) 0 clamp(22px, 3vw, 32px);
}
.page-faq .band-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--faq-muted);
  white-space: nowrap;
}
.page-faq .band-line {
  flex: 1 1 auto;
  height: 1px;
  background: var(--faq-line);
}

/* 索引（移动端：顶部横滑） */
.page-faq .faq-index {
  position: sticky;
  top: var(--frame-h);
  z-index: 6;
  background: var(--faq-paper);
  padding: 10px 0 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-index-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--faq-muted);
  margin: 0 0 8px;
}
.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--faq-ink);
  font-size: 13px;
  padding: 7px 11px;
  border: 1px solid var(--faq-line);
  background: rgba(255, 255, 255, 0.4);
}
.page-faq .faq-index-list a .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faq-muted);
}
.page-faq .faq-index-list a:hover {
  border-color: var(--cyan);
}

/* 问答组 */
.page-faq .faq-group {
  border-top: 1px solid var(--faq-line);
  padding-top: 20px;
  margin-bottom: clamp(30px, 4vw, 46px);
  scroll-margin-top: calc(var(--frame-h) + 96px);
}
.page-faq .faq-group-head {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
}
.page-faq .faq-idx {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-muted);
}
.page-faq .faq-idx::after {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--cyan);
}
.page-faq .faq-group-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
}
.page-faq .faq-group-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-muted);
  max-width: 62ch;
}

/* 可展开组 */
.page-faq .disclosure {
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-q {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
}
.page-faq .disclosure-btn {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  width: 100%;
  padding: 15px 0;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: var(--faq-ink);
  cursor: pointer;
}
.page-faq .disclosure-idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--faq-muted);
  padding-top: 3px;
}
.page-faq .faq-q-text {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
}
.page-faq .disclosure-btn:hover .faq-q-text,
.page-faq .disclosure-btn:focus-visible .faq-q-text {
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-faq .disclosure-btn:hover .disclosure-idx {
  color: var(--orange);
}
.page-faq .disclosure-sign {
  width: 0;
  height: 0;
  margin-top: 6px;
  border-left: 6px solid var(--faq-muted);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform 0.22s var(--ease), border-left-color 0.22s var(--ease);
}
.page-faq [aria-expanded="true"] .disclosure-sign {
  border-left-color: var(--orange);
  transform: rotate(90deg);
}
.page-faq .disclosure-panel {
  padding: 0 0 20px 0;
  max-width: 66ch;
}
.page-faq .disclosure-panel p {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(53, 224, 214, 0.6);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-copy);
}
.page-faq .disclosure-panel:not([hidden]) {
  animation: faqPanelIn 0.28s var(--ease) both;
}
@keyframes faqPanelIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 指标示意 */
.page-faq .faq-viz {
  display: grid;
  gap: 16px;
  margin: 4px 0 20px;
  padding: 16px;
  background: var(--faq-paper-2);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-viz-item {
  display: grid;
  gap: 8px;
}
.page-faq .faq-viz-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--faq-muted);
}
.page-faq .faq-viz svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-faq .faq-viz-cap {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--faq-muted);
}

/* 图文分栏 */
.page-faq .faq-split {
  display: grid;
  gap: 20px;
}
.page-faq .faq-figure {
  margin: 0;
  order: -1;
}
.page-faq .faq-figure .media-frame {
  aspect-ratio: 3 / 4;
}
.page-faq .faq-group:target .faq-idx {
  color: var(--orange);
}

/* 联系区 */
.page-faq .faq-contact {
  margin-top: clamp(36px, 5vw, 60px);
  padding: clamp(26px, 4vw, 44px);
  background: var(--ink);
  color: var(--paper);
  border-top: 3px solid var(--orange);
  background-image: linear-gradient(135deg, rgba(53, 224, 214, 0.1), rgba(10, 26, 47, 0) 58%);
}
.page-faq .faq-contact .eyebrow {
  color: var(--cyan);
}
.page-faq .faq-contact h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  max-width: 26ch;
  color: var(--paper);
}
.page-faq .faq-contact-lede {
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 228, 0.74);
  max-width: 56ch;
}
.page-faq .faq-contact-grid {
  display: grid;
  gap: 1px;
  background: rgba(244, 239, 228, 0.16);
  border-top: 1px solid rgba(244, 239, 228, 0.16);
  border-bottom: 1px solid rgba(244, 239, 228, 0.16);
}
.page-faq .faq-contact-item {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  background: var(--ink);
}
.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.page-faq .faq-contact-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(14px, 2vw, 16px);
  word-break: break-all;
  color: var(--paper);
}
.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: end;
  }
  .page-faq .faq-viz {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-contact-item {
    padding: 16px 20px 16px 0;
  }
}

/* 桌面：左侧固定索引 + 右侧问答 */
@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) 280px;
  }
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 58px);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--frame-h) + 24px);
    margin-bottom: 0;
    padding: 4px 0;
    border-bottom: 0;
    border-left: 1px solid var(--faq-line);
    background: transparent;
  }
  .page-faq .faq-index-title {
    padding-left: 14px;
  }
  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }
  .page-faq .faq-index-list a {
    border: 0;
    background: none;
    padding: 9px 0 9px 14px;
    font-size: 13.5px;
    color: var(--faq-muted);
    position: relative;
    transition: color 0.2s var(--ease);
  }
  .page-faq .faq-index-list a::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: transparent;
    transition: background 0.2s var(--ease);
  }
  .page-faq .faq-index-list a:hover {
    color: var(--faq-ink);
  }
  .page-faq .faq-index-list a:hover::before {
    background: var(--cyan);
  }
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 208px;
    gap: 30px;
  }
  .page-faq .faq-figure {
    order: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .disclosure-sign,
  .page-faq .faq-index-list a,
  .page-faq .faq-index-list a::before {
    transition: none;
  }
  .page-faq .disclosure-panel:not([hidden]) {
    animation: none;
  }
}