.page-faq {
  --faq-index-w: 236px;
  --faq-line-gold: rgba(200, 150, 62, .55);
  --faq-focus-bg: rgba(79, 179, 199, .08);
  padding-bottom: 96px;
}

.page-faq .d28-crumb {
  padding-top: 18px;
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .faq-hero {
  padding-top: 26px;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__lead .d28-display {
  margin: 14px 0 18px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  padding: 22px 20px;
  border: 1px solid var(--d28-line);
  border-radius: var(--d28-r-lg);
  background:
    linear-gradient(150deg, rgba(216, 52, 47, .16), rgba(11, 20, 36, .93) 54%),
    var(--d28-panel);
  box-shadow: var(--d28-shadow);
}

.page-faq .faq-hero__facts-title {
  grid-column: 1 / -1;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--d28-line);
  color: var(--d28-muted);
  font-size: .8125rem;
  letter-spacing: .1em;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body__grid {
  display: grid;
  gap: 30px;
}

/* ---------- 左栏分组索引 ---------- */
.page-faq .faq-index {
  padding: 18px;
  border: 1px solid var(--d28-line);
  border-radius: var(--d28-r-md);
  background: rgba(19, 30, 51, .74);
}

.page-faq .faq-index__head {
  margin: 0;
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--d28-line);
  border-radius: var(--d28-r-pill);
  color: var(--d28-text);
  font-size: .875rem;
  text-decoration: none;
  transition: border-color .18s var(--d28-ease), background-color .18s var(--d28-ease), color .18s var(--d28-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--d28-gold);
  background: rgba(200, 150, 62, .12);
}

.page-faq .faq-index__no {
  color: var(--d28-gold);
  font-size: .75rem;
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  color: var(--d28-muted);
  font-size: .8125rem;
  line-height: 1.7;
}

.page-faq .faq-index__cta {
  color: var(--d28-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 179, 199, .45);
}

.page-faq .faq-index__cta:hover,
.page-faq .faq-index__cta:focus-visible {
  border-bottom-color: var(--d28-cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-columns {
  display: grid;
  gap: 56px;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--d28-header-h) + 24px);
  transition: border-color .2s var(--d28-ease);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--d28-line);
  transition: border-color .2s var(--d28-ease);
}

.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: var(--d28-gold);
}

.page-faq .faq-group__no {
  color: var(--d28-red);
  font-size: 1rem;
  letter-spacing: .08em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 1.75rem;
}

.page-faq .faq-group__intro {
  margin: 14px 0 20px;
  max-width: 40em;
  color: var(--d28-muted);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-faq .faq-group__items {
  display: grid;
  gap: 10px;
}

/* ---------- 折叠问答条 ---------- */
.page-faq .faq-item {
  overflow: hidden;
  border: 1px solid var(--d28-line);
  border-radius: var(--d28-r-md);
  background: var(--d28-panel);
  transition: border-color .2s var(--d28-ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-line-gold);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  transition: background-color .18s var(--d28-ease);
}

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

.page-faq .faq-item__q:hover {
  background: var(--faq-focus-bg);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--d28-cyan);
  outline-offset: -2px;
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  width: 1.1em;
  color: var(--d28-gold);
  font-family: var(--d28-mono);
  font-size: 1.125rem;
  line-height: 1.5;
  transition: transform .2s var(--d28-ease);
}

.page-faq .faq-item__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(45deg);
}

.page-faq .faq-item__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: -.01em;
}

.page-faq .faq-item__a {
  padding: 14px 18px 18px;
  border-left: 2px solid var(--d28-gold);
  background: rgba(5, 7, 12, .3);
}

.page-faq .faq-item__a .d28-text {
  margin: 0 0 10px;
  font-size: .9375rem;
}

.page-faq .faq-item__a .d28-text:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-item__list li {
  position: relative;
  padding-left: 18px;
  color: var(--d28-text);
  font-size: .9375rem;
  line-height: 1.75;
}

.page-faq .faq-item__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--d28-cyan);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 18px;
}

.page-faq .faq-figure .d28-media__caption {
  color: var(--d28-muted);
}

/* ---------- 未覆盖问题出口 ---------- */
.page-faq .faq-next {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .faq-next__card {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--d28-line);
  border-radius: var(--d28-r-md);
  background: var(--d28-panel);
  color: inherit;
  text-decoration: none;
  transition: border-color .2s var(--d28-ease), transform .2s var(--d28-ease);
}

.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  border-color: var(--d28-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-next__title {
  font-size: .9375rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-next__desc {
  color: var(--d28-muted);
  font-size: .875rem;
  line-height: 1.7;
}

.page-faq .faq-group__outro {
  margin: 20px 0 0;
  color: var(--d28-muted);
  font-size: .875rem;
  line-height: 1.75;
}

.page-faq .faq-group__link {
  color: var(--d28-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 150, 62, .45);
}

.page-faq .faq-group__link:hover,
.page-faq .faq-group__link:focus-visible {
  border-bottom-color: var(--d28-gold);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .78fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--d28-header-h) + 20px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 6px;
  }

  .page-faq .faq-index__link {
    width: 100%;
    border-radius: var(--d28-r-sm);
  }

  .page-faq .faq-item__title {
    font-size: 1.125rem;
  }

  .page-faq .faq-group {
    padding-left: 20px;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-group:target {
    border-left-color: var(--d28-gold);
  }

  .page-faq .faq-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-group__title {
    font-size: 2rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark,
  .page-faq .faq-index__link,
  .page-faq .faq-next__card,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-group,
  .page-faq .faq-group__head {
    transition: none;
  }
}
</main>