.page-faq {
  --faq-ink-soft: #46536E;
  --faq-card: #FFFFFF;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: calc(var(--header-h) + 40px) 0 64px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-35) 18%, var(--neon-35) 62%, transparent);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 26px;
}

.page-faq .faq-hero-copy .display-1 {
  font-size: clamp(40px, 10vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 14ch;
}

.page-faq .faq-lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--paper-80);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 38px;
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--paper-12);
}

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

.page-faq .faq-stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--paper-55);
}

.page-faq .faq-stat-num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  font-weight: 600;
  color: var(--c-neon);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--paper-12);
  border-radius: var(--radius);
  background: var(--c-night);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: 56px 0 80px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

/* 分类刻度索引 */
.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--c-rule);
  scrollbar-width: none;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-link {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px 10px 0;
  color: var(--c-muted);
  text-decoration: none;
  font-size: var(--fs-14);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--c-ink);
}

.page-faq .faq-index-count {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--c-violet);
}

/* 筛选条 */
.page-faq .faq-chipbar {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 16px;
  margin-bottom: 8px;
  scrollbar-width: none;
}

.page-faq .faq-chipbar::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-chip {
  flex: 0 0 auto;
  appearance: none;
  border: 1px solid var(--c-rule);
  background: transparent;
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--c-violet);
  color: var(--c-ink);
}

.page-faq .faq-chip[aria-pressed="true"] {
  background: var(--c-deep);
  border-color: var(--c-deep);
  color: var(--c-neon);
}

/* 分组 */
.page-faq .faq-group {
  padding-top: 30px;
  margin-top: 30px;
  border-top: 1px solid var(--c-rule);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 36px;
}

.page-faq .faq-group-head {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.page-faq .faq-group-title {
  margin: 0;
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  line-height: 1.2;
}

.page-faq .faq-group:target .faq-group-title {
  color: var(--c-neon-ink);
}

.page-faq .faq-group-note {
  margin: 0;
  max-width: 60ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-muted);
}

/* 手风琴条目 */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--c-rule);
}

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 1px;
  background: var(--c-rule);
  transition: background-color 0.32s var(--ease), bottom 0.34s var(--ease);
}

.page-faq .faq-item[open]::before {
  background: var(--c-neon-ink);
  bottom: 20px;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: 46px 1fr 20px;
  gap: 6px;
  align-items: start;
  padding: 18px 0 18px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-violet);
  padding-top: 5px;
  transition: color 0.28s var(--ease);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--c-neon-ink);
}

.page-faq .faq-text {
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-faq .faq-marker {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  justify-self: end;
}

.page-faq .faq-marker::before,
.page-faq .faq-marker::after {
  content: "";
  position: absolute;
  background: var(--c-muted);
  transition: transform 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-faq .faq-marker::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-marker::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-marker::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-marker::before {
  background: var(--c-neon-ink);
}

.page-faq .faq-a {
  padding: 0 8px 22px 62px;
  max-width: 68ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-answer-in 0.32s var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-where {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 10px 14px;
  background: var(--faq-card);
  border: 1px solid var(--c-rule);
  border-left: 3px solid var(--c-amber);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(11, 15, 26, 0.03), 0 6px 14px -12px rgba(11, 15, 26, 0.28);
  font-size: var(--fs-14);
  color: var(--c-ink);
}

.page-faq .loc-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-faq .faq-link {
  color: var(--c-neon-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-link:hover {
  color: var(--c-amber);
}

/* 内嵌示意图 */
.page-faq .faq-inline-figure {
  margin: 22px 0 22px 62px;
  position: relative;
  overflow: hidden;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--c-rule);
  border-radius: var(--radius);
  background: var(--faq-card);
}

.page-faq .faq-inline-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-inline-figure .figure-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 8px 12px;
  margin: 0;
  background: rgba(10, 22, 51, 0.82);
  color: var(--paper-80);
  font-size: var(--fs-12);
  line-height: 1.6;
}

/* ---------- 求助区 ---------- */
.page-faq .faq-help {
  padding: 64px 0 72px;
}

.page-faq .faq-help-head {
  max-width: 62ch;
}

.page-faq .faq-help-head .display-2 {
  margin: 14px 0 0;
  font-size: clamp(28px, 5.4vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-faq .faq-help-lede {
  margin: 18px 0 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--paper-80);
}

.page-faq .faq-help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 34px;
}

.page-faq .faq-help-card {
  padding: 22px;
  background: var(--c-night);
  border: 1px solid var(--paper-12);
  border-top: 2px solid var(--c-neon);
  border-radius: var(--radius);
}

.page-faq .faq-help-card--list {
  border-top-color: var(--c-violet);
}

.page-faq .faq-help-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--paper-55);
}

.page-faq .faq-help-value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  color: var(--c-paper);
  word-break: break-word;
}

.page-faq .faq-help-value a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid var(--neon-35);
}

.page-faq .faq-help-note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-60);
}

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

.page-faq .faq-help-list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--paper-80);
}

.page-faq .faq-help-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-amber);
}

.page-faq .faq-help-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-faq .faq-help-cta .btn {
  flex: 0 0 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 64px) 0 88px;
  }

  .page-faq .faq-body {
    padding: 72px 0 104px;
  }

  .page-faq .faq-help {
    padding: 84px 0 92px;
  }

  .page-faq .faq-help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-help-card--list {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-faq .faq-hero-figure {
    aspect-ratio: 3 / 2;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index-list {
    display: grid;
    gap: 0;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--c-rule);
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    flex-direction: row;
    justify-content: space-between;
    padding: 9px 0 9px 14px;
    border-left: 1px solid transparent;
    margin-left: -1px;
    white-space: normal;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-left-color: var(--c-neon-ink);
  }

  .page-faq .faq-chipbar {
    padding-bottom: 18px;
  }

  .page-faq .faq-a {
    padding-left: 78px;
  }

  .page-faq .faq-inline-figure {
    margin-left: 78px;
    max-width: 640px;
  }

  .page-faq .faq-help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help-card--list {
    grid-column: auto;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 84px;
  }

  .page-faq .faq-group {
    padding-top: 36px;
    margin-top: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-marker::before,
  .page-faq .faq-marker::after,
  .page-faq .faq-num,
  .page-faq .faq-chip {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }
}