.page-faq {
  --faq-spine: 88px;
  --faq-line: var(--color-line);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block-end: var(--space-6);
  border-bottom: 1px solid var(--color-contrast-line);
}

.page-faq .faq-hero .breadcrumb,
.page-faq .faq-hero .breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface));
}

.page-faq .faq-hero .breadcrumb__list li + li::before {
  content: "/";
  margin-inline-end: var(--space-1);
  color: var(--color-contrast-line);
}

.page-faq .faq-hero .breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-hero .breadcrumb a:hover {
  border-bottom-color: currentColor;
}

.page-faq .faq-hero .breadcrumb__list li[aria-current="page"] {
  color: var(--color-contrast-ink);
}

.page-faq .faq-hero__kicker {
  margin: var(--space-6) 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-faq .faq-hero__desc {
  margin: var(--space-3) 0 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, var(--color-contrast-surface));
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-contrast-line);
  border: 1px solid var(--color-contrast-line);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2);
  background: var(--color-contrast-surface);
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: var(--leading-heading);
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-ink);
}

.page-faq .faq-stat__label {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, var(--color-contrast-surface));
}

.page-faq .faq-hero__figure {
  margin: var(--space-4) 0 0;
  border: 1px solid var(--color-contrast-line);
  overflow: hidden;
  aspect-ratio: 16 / 7;
  background: var(--color-contrast-surface);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.08) brightness(0.72) sepia(0.42) hue-rotate(178deg) saturate(1.5);
}

/* ---------- 分组索引条 ---------- */
.page-faq .faq-index {
  background: var(--color-surface-deep);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(150px, 1fr);
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--color-line);
}

.page-faq .faq-index__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3) var(--space-2);
  border-left: 1px solid var(--faq-line);
  text-decoration: none;
  color: var(--color-ink);
  font-size: var(--text-sm);
  line-height: 1.35;
  transition: background-color 160ms ease-out, color 160ms ease-out;
}

.page-faq .faq-index__list > li:first-child .faq-index__item {
  border-left: 0;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item[aria-current="true"] {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-faq .faq-index__item:hover .faq-index__num,
.page-faq .faq-index__item[aria-current="true"] .faq-index__num {
  color: var(--color-primary-ink);
}

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

/* ---------- 分组主体 ---------- */
.page-faq .faq-group {
  padding-block: var(--space-6);
  scroll-margin-top: var(--space-8);
}

.page-faq .faq-group--alt {
  background: var(--color-surface-alt);
}

.page-faq .faq-group__head {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-faq .faq-group__desc {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-faq .faq-pause {
  margin: 0;
  padding: 0 0 var(--space-6);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-faq .faq-pause a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 45%, transparent);
}

.page-faq .faq-pause a:hover {
  border-bottom-color: var(--color-primary);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .disclosure__trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  margin: 0;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.45;
  color: var(--color-ink);
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-q {
  flex: 1 1 auto;
  max-width: 62ch;
}

.page-faq .disclosure__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: calc(var(--space-1) / 2);
  border: 1px solid var(--faq-line);
  background: var(--color-surface-alt);
  transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.page-faq .faq-group--alt .disclosure__icon {
  background: var(--color-surface);
}

.page-faq .disclosure__icon::before,
.page-faq .disclosure__icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
}

.page-faq .disclosure__icon::before {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .disclosure__icon::after {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .disclosure__trigger[aria-expanded="true"] .disclosure__icon {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-faq .disclosure__trigger[aria-expanded="true"] .disclosure__icon::before {
  opacity: 0;
}

.page-faq .disclosure__trigger[aria-expanded="true"] .disclosure__icon::after {
  background: var(--color-primary-ink);
}

.page-faq .disclosure__panel {
  padding-left: var(--space-3);
  margin-bottom: var(--space-3);
  border-left: 1px solid var(--faq-line);
}

.page-faq .disclosure__panel[hidden] {
  display: none;
}

.page-faq .faq-a {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-faq .faq-a p {
  margin: 0 0 var(--space-2);
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 45%, transparent);
}

.page-faq .faq-a a:hover {
  border-bottom-color: var(--color-primary);
}

.page-faq .disclosure__meta {
  margin-top: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.page-faq .disclosure__meta a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-faq .disclosure__meta a:hover {
  border-bottom-color: var(--color-primary);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 var(--space-3);
  border: 1px solid var(--faq-line);
  background: var(--color-surface-deep);
}

.page-faq .faq-figure__media {
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.06) brightness(0.94) sepia(0.38) hue-rotate(178deg) saturate(1.5);
}

.page-faq .faq-figure figcaption {
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--faq-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 宽屏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-block-end: var(--space-8);
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-hero__figure {
    aspect-ratio: 16 / 5;
    margin-top: var(--space-6);
  }

  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow: visible;
  }

  .page-faq .faq-index__item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .page-faq .faq-group {
    padding-block: var(--section-y);
  }

  .page-faq .faq-group__head {
    grid-template-columns: var(--faq-spine) minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
    padding-bottom: var(--space-4);
  }

  .page-faq .faq-pause {
    padding-bottom: var(--section-y);
    padding-left: calc(var(--faq-spine) + var(--space-3));
  }

  .page-faq .faq-figure {
    margin-bottom: var(--space-4);
    margin-left: calc(var(--faq-spine) + var(--space-3));
    max-width: 640px;
  }

  .page-faq .disclosure__trigger {
    padding: var(--space-4) 0;
  }
}