/**
 * 常见问答独立页 — 自包含样式（不依赖 home-bundle.css）
 * 布局参考 Stripe Docs / Linear Help / Notion FAQ
 * 手风琴：grid 0fr + 内层 wrapper，收起时答案零高度、零可见
 */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body.faq-page {
  --faq-ink: #1a1814;
  --faq-muted: #6b6560;
  --faq-text: #3d3935;
  --faq-cream: #fafaf8;
  --faq-surface: #ffffff;
  --faq-border: rgba(26, 24, 20, 0.08);
  --faq-border-strong: rgba(26, 24, 20, 0.12);
  --faq-gold: #b8882a;
  --faq-gold-deep: #96701f;
  --faq-gold-soft: rgba(184, 136, 42, 0.1);
  --faq-sage: #1a9e6a;
  --faq-sage-soft: rgba(26, 158, 106, 0.1);
  --faq-radius: 12px;
  --faq-radius-lg: 16px;
  --faq-shadow: 0 1px 2px rgba(26, 24, 20, 0.04), 0 8px 24px rgba(26, 24, 20, 0.06);
  --faq-font-display: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
  --faq-font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --faq-container: min(1120px, calc(100% - 2 * clamp(1rem, 4vw, 2.5rem)));
  --faq-sidebar-w: 220px;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(184, 136, 42, 0.05), transparent 55%),
    radial-gradient(ellipse 60% 40% at 95% 0%, rgba(26, 158, 106, 0.04), transparent 50%),
    var(--faq-cream);
  color: var(--faq-ink);
  font-family: var(--faq-font-body);
  -webkit-font-smoothing: antialiased;
}

body.faq-page.has-site-chrome main.faq-page {
  padding-top: 0;
  margin: 0;
}

body.faq-page .faq-page {
  flex: 1;
  padding: 0;
  margin: 0;
}

.faq-page-container {
  width: var(--faq-container);
  max-width: 100%;
  margin-inline: auto;
  box-sizing: border-box;
}

.faq-page-layout {
  display: grid;
  grid-template-columns: var(--faq-sidebar-w) minmax(0, 1fr);
  gap: clamp(1.75rem, 3.5vw, 2.75rem);
  align-items: start;
  padding-top: calc(var(--nav-total-h, 72px) + 0.85rem);
  padding-bottom: clamp(3rem, 6vw, 4.5rem);
}

.faq-page-primary {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.faq-page-header {
  padding: 0;
  margin: 0;
  background: none;
  border: none;
}

.faq-page-header__crumb {
  margin-bottom: 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.faq-page-header__row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.75rem;
}

.faq-page-eyebrow {
  margin: 0 0 0.45rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faq-gold);
}

.faq-page-title {
  margin: 0 0 0.55rem;
  font-family: var(--faq-font-display);
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--faq-ink);
  max-width: 20ch;
}

.faq-page-title .accent { color: var(--faq-sage); }

.faq-page-lede {
  margin: 0;
  max-width: 38rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--faq-muted);
}

.faq-page-lede strong {
  color: var(--faq-ink);
  font-weight: 600;
}

.faq-page-header__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  flex-shrink: 0;
}

.faq-stat-pill {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  padding: 0.5rem 0.8rem;
  min-width: 5rem;
  border-radius: var(--faq-radius);
  border: 1px solid var(--faq-border);
  background: var(--faq-surface);
}

.faq-stat-pill strong {
  font-family: var(--faq-font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--faq-ink);
}

.faq-stat-pill span {
  font-size: 0.65rem;
  color: var(--faq-muted);
}

.faq-stat-pill--accent {
  border-color: color-mix(in srgb, var(--faq-gold) 25%, transparent);
  background: var(--faq-gold-soft);
}

.faq-stat-pill--accent strong {
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--faq-gold-deep);
}

.faq-page-aside__sticky {
  position: sticky;
  top: calc(var(--nav-total-h, 72px) + 0.65rem);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-page-search { position: relative; }

.faq-page-search__icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faq-muted);
  pointer-events: none;
}

.faq-page-search__input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.58rem 0.75rem 0.58rem 2.2rem;
  font-family: inherit;
  font-size: 0.8125rem;
  color: var(--faq-ink);
  border: 1px solid var(--faq-border-strong);
  border-radius: var(--faq-radius);
  background: var(--faq-surface);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-page-search__input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--faq-gold) 45%, transparent);
  box-shadow: 0 0 0 3px var(--faq-gold-soft);
}

.faq-page-aside__nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.faq-sidebar__link {
  display: grid;
  grid-template-columns: 1.75rem 1fr auto;
  align-items: center;
  gap: 0.45rem;
  padding: 0.52rem 0.55rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--faq-text);
  border: 1px solid transparent;
  transition: background 0.18s, color 0.18s, border-color 0.18s;
}

.faq-sidebar__link:hover { background: rgba(26, 24, 20, 0.04); }

.faq-sidebar__link.is-active {
  background: var(--faq-gold-soft);
  border-color: color-mix(in srgb, var(--faq-gold) 22%, transparent);
  color: var(--faq-gold-deep);
}

.faq-sidebar__link-num {
  font-size: 0.62rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--faq-muted);
}

.faq-sidebar__link.is-active .faq-sidebar__link-num { color: var(--faq-gold); }

.faq-sidebar__link-text {
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.35;
}

.faq-sidebar__link-count {
  font-size: 0.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--faq-muted);
  background: var(--faq-cream);
  border: 1px solid var(--faq-border);
  border-radius: 999px;
  padding: 0.08rem 0.38rem;
  min-width: 1.2rem;
  text-align: center;
}

.faq-page-aside__empty {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--faq-muted);
  line-height: 1.5;
}

.faq-page-search__meta {
  margin: 0.35rem 0 0;
  font-size: 0.72rem;
  color: var(--faq-muted);
  min-height: 1.1em;
}

.faq-page-search__meta:empty { display: none; }

.faq-page-trust {
  margin-top: 0.15rem;
  padding: 0.9rem;
  border-radius: var(--faq-radius);
  border: 1px solid color-mix(in srgb, var(--faq-gold) 18%, transparent);
  background: linear-gradient(145deg, var(--faq-surface), color-mix(in srgb, var(--faq-gold-soft) 60%, transparent));
}

.faq-page-trust__label {
  margin: 0 0 0.55rem;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faq-gold-deep);
}

.faq-page-trust__list {
  margin: 0 0 0.65rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.faq-page-trust__list li {
  font-size: 0.76rem;
  line-height: 1.45;
  color: var(--faq-text);
  padding-left: 0.8rem;
  position: relative;
}

.faq-page-trust__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--faq-sage);
}

.faq-page-trust__link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--faq-gold);
  text-decoration: none;
}

.faq-page-trust__link:hover { color: var(--faq-gold-deep); }

.faq-page-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.faq-category {
  scroll-margin-top: calc(var(--nav-total-h, 72px) + 0.75rem);
}

.faq-category__head {
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--faq-border-strong);
}

.faq-category__index {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--faq-font-display);
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--faq-gold);
  letter-spacing: 0.06em;
}

.faq-category[data-faq-category='aigeo'] .faq-category__index { color: var(--faq-sage); }

.faq-category__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.faq-category__title {
  margin: 0;
  font-family: var(--faq-font-display);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--faq-ink);
}

.faq-category__count {
  margin: 0;
  flex-shrink: 0;
  font-size: 0.72rem;
  color: var(--faq-muted);
  white-space: nowrap;
}

.faq-list--standalone {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.faq-page .faq-list--standalone .faq-item {
  display: grid;
  grid-template-rows: auto 0fr;
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-surface);
  overflow: hidden;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, grid-template-rows 0.32s ease;
}

.faq-page .faq-list--standalone .faq-item:hover {
  border-color: color-mix(in srgb, var(--faq-gold) 18%, transparent);
}

.faq-page .faq-list--standalone .faq-item.open {
  grid-template-rows: auto 1fr;
  border-color: color-mix(in srgb, var(--faq-gold) 30%, transparent);
  box-shadow: var(--faq-shadow);
  border-left: 3px solid var(--faq-gold);
  background: color-mix(in srgb, var(--faq-gold-soft) 28%, var(--faq-surface));
}

.faq-page .faq-list--standalone .faq-q {
  width: 100%;
  margin: 0;
  padding: 0.95rem 1.1rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--faq-ink);
  transition: color 0.18s;
}

.faq-page .faq-list--standalone .faq-q:focus-visible {
  outline: 2px solid var(--faq-gold);
  outline-offset: -2px;
  border-radius: var(--faq-radius);
}

.faq-page .faq-list--standalone .faq-q:hover,
.faq-page .faq-list--standalone .faq-item.open .faq-q {
  color: var(--faq-gold-deep);
}

.faq-page .faq-list--standalone .faq-q-text {
  flex: 1;
  min-width: 0;
}

.faq-page .faq-list--standalone .faq-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1;
  color: var(--faq-gold);
  border: 1.5px solid color-mix(in srgb, var(--faq-gold) 35%, transparent);
  border-radius: 50%;
  background: var(--faq-gold-soft);
  transition: transform 0.28s ease, background 0.22s, color 0.22s, border-color 0.22s;
}

.faq-page .faq-list--standalone .faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--faq-gold);
  color: #fff;
  border-color: var(--faq-gold);
}

.faq-page .faq-list--standalone .faq-a {
  max-height: none !important;
  min-height: 0;
  margin: 0;
  padding: 0 !important;
  overflow: hidden;
  border-top: none !important;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s ease, visibility 0.22s ease;
}

.faq-page .faq-list--standalone .faq-a__inner {
  min-height: 0;
  overflow: hidden;
  padding: 0 1.1rem;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--faq-text);
}

.faq-page .faq-list--standalone .faq-item.open .faq-a {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  border-top: 1px solid var(--faq-border) !important;
}

.faq-page .faq-list--standalone .faq-item.open .faq-a__inner {
  padding: 0.75rem 1.1rem 1rem;
}

.faq-item.is-hidden,
.faq-category.is-hidden {
  display: none !important;
}

.faq-category.is-dimmed {
  opacity: 0.4;
  pointer-events: none;
}

.faq-page-cta {
  padding: 0;
  margin-top: 0.5rem;
}

.faq-page-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.15rem 1.75rem;
  padding: 1.35rem 1.5rem;
  border-radius: var(--faq-radius-lg);
  border: 1px solid color-mix(in srgb, var(--faq-gold) 18%, transparent);
  background: linear-gradient(135deg, var(--faq-surface) 0%, color-mix(in srgb, var(--faq-gold-soft) 40%, transparent) 100%);
  box-shadow: var(--faq-shadow);
}

.faq-page-cta__title {
  margin: 0 0 0.3rem;
  font-family: var(--faq-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--faq-ink);
}

.faq-page-cta__lede {
  margin: 0;
  max-width: 32rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--faq-muted);
}

.faq-page-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.faq-page-cta__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.15rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
}

.faq-page-cta__btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--faq-gold) 0%, var(--faq-gold-deep) 100%);
  box-shadow: 0 4px 16px rgba(184, 136, 42, 0.28);
}

.faq-page-cta__btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(184, 136, 42, 0.34);
}

.faq-page-cta__btn--ghost {
  color: var(--faq-ink);
  border: 1px solid var(--faq-border-strong);
  background: var(--faq-surface);
}

.faq-page-cta__btn--ghost:hover {
  border-color: color-mix(in srgb, var(--faq-gold) 30%, transparent);
  color: var(--faq-gold-deep);
}

.faq-page-noscript { margin-top: 2rem; }

.faq-page-noscript-group h2 {
  font-size: 1rem;
  margin: 1.5rem 0 0.75rem;
}

.faq-noscript-item {
  margin-bottom: 0.5rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-surface);
}

.faq-noscript-item summary {
  font-weight: 600;
  cursor: pointer;
}

.faq-noscript-item p {
  margin: 0.65rem 0 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--faq-text);
}

@media (max-width: 900px) {
  .faq-page-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding-top: calc(var(--nav-total-h, 72px) + 0.65rem);
  }
  .faq-page-aside__sticky { position: static; }
  .faq-page-aside__nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
  }
  .faq-sidebar__link {
    grid-template-columns: auto auto;
    padding: 0.42rem 0.6rem;
  }
  .faq-sidebar__link-num,
  .faq-sidebar__link-count { display: none; }
  .faq-page-trust { display: none; }
  .faq-page-title { max-width: none; }
  .faq-page-header__row {
    flex-direction: column;
    align-items: flex-start;
  }
  .faq-page-primary { gap: 1.35rem; }
}

@media (max-width: 560px) {
  .faq-page-header__stats {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }
  .faq-stat-pill {
    min-width: 0;
    padding: 0.45rem 0.5rem;
  }
  .faq-category__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.12rem;
  }
  .faq-page-cta__inner {
    flex-direction: column;
    align-items: stretch;
  }
  .faq-page-cta__btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .faq-page .faq-list--standalone .faq-item,
  .faq-page .faq-list--standalone .faq-a,
  .faq-page .faq-list--standalone .faq-icon {
    transition: none;
  }
}