.page-faq {
  --faq-rule: rgba(159, 176, 200, 0.16);
  --faq-rule-strong: rgba(159, 176, 200, 0.3);
  --faq-ink-soft: var(--c-mist);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin-bottom: clamp(28px, 4vw, 44px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero-title {
  margin: 14px 0 0;
  font-size: clamp(2.75rem, 8vw, 6rem);
  font-weight: 250;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--c-cream);
}

.page-faq .faq-hero-lede {
  max-width: 62ch;
  margin: 24px 0 0;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

/* ---------- 首屏数据条 ---------- */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  margin: clamp(32px, 4vw, 44px) 0 0;
  padding: 0;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-faq .faq-stat {
  padding: 20px 22px 22px;
  background: var(--c-panel);
}

.page-faq .faq-stat .data-label {
  margin: 0;
}

.page-faq .faq-stat-num {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3.2vw, 2.25rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--c-amber);
}

.page-faq .faq-stat-unit {
  margin-left: 6px;
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--faq-ink-soft);
}

/* ---------- 首屏图 ---------- */
.page-faq .faq-hero-figure {
  margin: clamp(32px, 4vw, 48px) 0 0;
}

.page-faq .faq-hero-figure .media-frame {
  border-radius: var(--radius-l);
}

/* ---------- 左右分屏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 40px;
  padding-top: clamp(32px, 4vw, 52px);
  border-top: 1px solid var(--faq-rule);
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 244px) minmax(0, 1fr);
    gap: clamp(48px, 5vw, 72px);
  }
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
}

@media (min-width: 1040px) {
  .page-faq .faq-index {
    position: sticky;
    top: 32px;
    align-self: start;
  }
}

.page-faq .faq-index-label {
  margin: 0 0 14px;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--faq-ink-soft);
}

.page-faq .faq-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqidx;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-index-list li {
  counter-increment: faqidx;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-index-list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 13px 4px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--c-cream);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-index-list a::before {
  content: counter(faqidx, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-teal);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--c-teal);
  padding-left: 12px;
}

.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

.page-faq .faq-index-card {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--faq-rule-strong);
  border-radius: var(--radius-m);
  background: linear-gradient(155deg, rgba(25, 168, 122, 0.14), rgba(224, 163, 46, 0.08));
}

.page-faq .faq-index-card-title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-cream);
}

.page-faq .faq-index-card-text {
  margin: 0 0 16px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* ---------- 右侧分组 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 72px);
  padding-top: clamp(30px, 4vw, 44px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-faq .faq-group-no {
  grid-row: span 2;
  padding-top: 0.4em;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-teal);
}

.page-faq #faq-cooperation .faq-group-no {
  color: var(--c-coral);
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: clamp(1.375rem, 2.6vw, 1.875rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--c-cream);
}

.page-faq .faq-group-lede {
  grid-column: 2;
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-list {
  margin-top: 22px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--c-cream);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  color: var(--c-teal);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

.page-faq .faq-toggle {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--faq-rule-strong);
  border-radius: 50%;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1.5px;
  background: var(--c-teal);
  transform: translate(-50%, -50%);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.page-faq .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-toggle {
  border-color: var(--c-teal);
  background: rgba(25, 168, 122, 0.16);
}

.page-faq .faq-item[open] .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-a {
  max-width: 68ch;
  padding: 0 2px 22px 32px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-a > p {
  margin: 0;
}

.page-faq .faq-a > p + p {
  margin-top: 12px;
}

.page-faq .faq-a a {
  color: var(--c-teal);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--c-amber);
}

.page-faq .faq-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- 章节插图 ---------- */
.page-faq .faq-figure {
  margin: 30px 0 4px;
}

.page-faq .faq-figure .media-frame {
  border-radius: var(--radius-m);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-a {
    padding-left: 0;
  }

  .page-faq .faq-item > summary {
    font-size: 0.9375rem;
    padding: 16px 0;
  }
}

@media (max-width: 1040px) {
  .page-faq .faq-index-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    border-top: none;
  }

  .page-faq .faq-index-list li {
    border-top: 1px solid var(--faq-rule);
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    padding-left: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after,
  .page-faq .faq-item > summary,
  .page-faq .faq-index-list a {
    transition: none;
  }
}