/* ===== 疑问解答库 /faq/ ===== */
.page-faq {
  --faq-rule: var(--border-thin) dashed var(--color-line);
}

/* --- 封面区 --- */
.page-faq .faq-cover {
  position: relative;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
}

.page-faq .faq-cover::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -18%;
  width: 56vw;
  height: 56vw;
  max-width: 560px;
  max-height: 560px;
  border: var(--border-thin) dashed var(--color-contrast-line);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.page-faq .faq-cover > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-cover .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

.page-faq .faq-cover .breadcrumbs li + li::before {
  content: "／";
  margin-right: var(--space-2);
  color: var(--color-contrast-line);
}

.page-faq .faq-cover .breadcrumbs a {
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
}

.page-faq .faq-cover .breadcrumbs a:hover,
.page-faq .faq-cover .breadcrumbs a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
}

.page-faq .faq-cover .eyebrow {
  margin: var(--space-4) 0 0;
  color: var(--color-contrast-accent);
}

.page-faq .faq-cover h1 {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.94;
  letter-spacing: var(--tracking-heading);
  max-width: 15ch;
}

.page-faq .faq-cover-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-faq .faq-cover .lede {
  margin: 0;
  max-width: 46ch;
  color: color-mix(in srgb, var(--color-contrast-ink) 90%, transparent);
}

.page-faq .faq-cover-note {
  margin: var(--space-3) 0 0;
  max-width: 46ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 64%, transparent);
  border-left: var(--border-thin) solid var(--color-contrast-accent);
  padding-left: var(--space-2);
}

.page-faq .faq-cover-figure {
  margin: 0;
}

.page-faq .faq-cover-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thin) dotted var(--color-contrast-line);
  list-style: none;
}

.page-faq .faq-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
}

.page-faq .faq-stat-label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
}

/* --- 分组索引 --- */
.page-faq .faq-index-hint {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-faq .faq-index-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-1);
  border: var(--border-thin) dashed transparent;
  color: var(--color-ink);
  text-align: center;
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-faq .faq-index-item a:hover,
.page-faq .faq-index-item a:focus-visible {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.page-faq .faq-index-item .circle-numeral {
  width: 3.4em;
  height: 3.4em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
}

.page-faq .faq-index-label {
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-index-figure {
  margin: var(--space-6) 0 0;
}

.page-faq .faq-index-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 1;
  object-fit: cover;
}

/* --- 问答分组 --- */
.page-faq .faq-group {
  padding-top: var(--section-y);
}

.page-faq .faq-group + .faq-group {
  padding-top: var(--section-y-lg);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-ink);
  margin-bottom: var(--space-4);
}

.page-faq .faq-group-head .circle-numeral {
  flex: 0 0 auto;
  width: 3.2em;
  height: 3.2em;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.15;
}

.page-faq .faq-group-desc {
  margin: var(--space-1) 0 0;
  max-width: 46ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-faq .faq-item {
  border-top: var(--faq-rule);
}

.page-faq .faq-item:first-child {
  border-top: 0;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.25;
  letter-spacing: var(--tracking-heading);
  transition: color 160ms ease;
}

.page-faq .faq-item summary:hover h3,
.page-faq .faq-item summary:focus-visible h3 {
  color: var(--color-primary);
}

.page-faq .faq-item[open] summary h3 {
  color: var(--color-primary);
}

.page-faq .faq-toggle {
  position: relative;
  flex: 0 0 auto;
  width: 1.75em;
  height: 1.75em;
  margin-top: 0.15em;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-pill);
  transition: background-color 160ms ease;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  background-color: var(--color-primary);
  transition: transform 160ms ease;
}

.page-faq .faq-toggle::before {
  top: 24%;
  bottom: 24%;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .faq-toggle::after {
  left: 24%;
  right: 24%;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item[open] .faq-toggle {
  background-color: var(--color-primary-soft);
}

.page-faq .faq-item[open] .faq-toggle::before {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-answer {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  padding: 0 0 var(--space-2) var(--space-3);
  border-left: var(--border-thin) solid var(--color-primary-soft);
}

.page-faq .faq-answer p {
  margin: 0 0 var(--space-2);
  color: var(--color-ink-soft);
}

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

.page-faq .faq-answer a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) dotted var(--color-primary);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  border-bottom-style: solid;
}

.page-faq .field {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--color-ink);
  background-color: var(--color-surface-deep);
  padding: 0 0.4em;
  white-space: nowrap;
}

/* --- 收尾 --- */
.page-faq .faq-closing {
  margin-top: var(--section-y-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-faq .faq-closing h2 {
  margin: 0;
  font-size: var(--text-2xl);
  color: var(--color-contrast-ink);
}

.page-faq .faq-closing-text {
  margin: var(--space-3) 0 0;
  max-width: 58ch;
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.page-faq .faq-closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

/* --- 断点 --- */
@media (min-width: 640px) {
  .page-faq .faq-index-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-cover {
    padding-top: var(--space-8);
    padding-bottom: var(--section-y);
  }

  .page-faq .faq-cover-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: var(--space-6);
  }

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

  .page-faq .faq-group-head h2 {
    font-size: var(--text-2xl);
  }

  .page-faq .faq-item summary h3 {
    font-size: var(--text-xl);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index-list {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .page-faq .faq-answer {
    padding-left: var(--space-4);
    margin-bottom: var(--space-3);
  }
}