.page-faq {
  --faq-measure: 66ch;
  --faq-line: rgba(233, 238, 250, 0.1);
  --faq-line-soft: rgba(233, 238, 250, 0.06);
  --faq-inner: 14px;
}

.page-faq .faq-topline {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line);
  background: rgba(6, 10, 26, 0.88);
  backdrop-filter: blur(10px);
}

.page-faq .update-line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-dust);
}

.page-faq .update-stamp {
  color: var(--c-gold);
}

.page-faq .faq-topline-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-dust);
  opacity: 0.85;
}

/* ---------- 页头 ---------- */

.page-faq .faq-head {
  padding: 32px 0 26px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-head .breadcrumb {
  margin-bottom: 18px;
}

.page-faq .faq-head h1 {
  margin: 14px 0 0;
  max-width: 21ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 6.2vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--c-silver);
  overflow-wrap: break-word;
}

.page-faq .faq-head .lede {
  margin: 18px 0 0;
  max-width: var(--faq-measure);
  color: var(--c-body);
}

/* ---------- 通用区块 ---------- */

.page-faq .faq-block {
  padding: 40px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-block:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-block .section-title {
  margin: 10px 0 18px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.28;
  color: var(--c-silver);
}

.page-faq .prose {
  max-width: var(--faq-measure);
  color: var(--c-body);
}

.page-faq .prose a,
.page-faq .faq-note a,
.page-faq .data-value a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 210, 0.4);
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .prose a:hover,
.page-faq .faq-note a:hover,
.page-faq .data-value a:hover,
.page-faq .prose a:focus-visible,
.page-faq .faq-note a:focus-visible {
  color: var(--c-blue);
  border-bottom-color: var(--c-blue);
}

/* ---------- 步骤条 ---------- */

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-width: var(--faq-measure);
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--faq-line-soft);
  border-left: 2px solid rgba(56, 225, 210, 0.35);
  border-radius: 10px;
  background: var(--c-panel);
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
  overflow-wrap: break-word;
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--c-cyan);
}

.page-faq .faq-note {
  max-width: var(--faq-measure);
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-gold-deep);
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-dust);
}

/* ---------- 检索章节 ---------- */

.page-faq .faq-split {
  margin-top: 6px;
  gap: 26px;
}

.page-faq .faq-split-text {
  min-width: 0;
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-faq .faq-figure .media-caption {
  color: var(--c-dust);
}

.page-faq .faq-figure--wide {
  max-width: var(--faq-measure);
  margin: 0 0 30px;
}

/* ---------- 键值表 ---------- */

.page-faq .faq-data {
  max-width: var(--faq-measure);
  margin-top: 22px;
}

.page-faq .faq-data .data-row {
  align-items: baseline;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-data .data-key {
  color: var(--c-dust);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .faq-data .data-value {
  color: var(--c-body);
}

/* ---------- 指标块 ---------- */

.page-faq .faq-metrics {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  max-width: var(--faq-measure);
}

.page-faq .faq-metric {
  display: grid;
  gap: 4px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(243, 196, 106, 0.28);
  background: linear-gradient(150deg, rgba(243, 196, 106, 0.09), rgba(14, 21, 51, 0.6));
}

.page-faq .faq-metric-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-gold);
}

.page-faq .faq-metric-unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-gold);
  opacity: 0.8;
}

.page-faq .faq-metric-label {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-dust);
}

/* ---------- 问答组 ---------- */

.page-faq .faq-qa .section-title {
  max-width: 20ch;
}

.page-faq .filter-bar {
  margin: 0 0 20px;
  gap: 8px;
}

.page-faq .filter-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: var(--c-glass);
  color: var(--c-dust);
  padding: 7px 14px;
  cursor: pointer;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .filter-chip:hover {
  color: var(--c-silver);
  border-color: rgba(56, 225, 210, 0.5);
}

.page-faq .filter-chip[aria-pressed="true"],
.page-faq .filter-chip.is-active {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-faq .filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-dust);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  max-width: var(--faq-measure);
}

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

.page-faq .faq-group {
  min-width: 0;
}

.page-faq .expand-group {
  border: 1px solid var(--faq-line);
  border-radius: 12px;
  background: var(--c-panel);
  overflow: hidden;
  transition: border-color 200ms var(--ease);
}

.page-faq .expand-group:hover {
  border-color: rgba(56, 225, 210, 0.35);
}

.page-faq .expand-trigger {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 18px;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 15px 16px;
  border: 0;
  background: transparent;
  text-align: left;
  color: var(--c-silver);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
}

.page-faq .expand-trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--c-cyan);
  opacity: 0;
  transition: opacity 200ms var(--ease);
}

.page-faq .expand-trigger:hover::before,
.page-faq .expand-trigger:focus-visible::before {
  opacity: 0.45;
}

.page-faq .expand-trigger[aria-expanded="true"]::before {
  opacity: 1;
}

.page-faq .faq-q-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--c-cyan);
}

.page-faq .faq-q-text {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-faq .expand-icon {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .expand-icon::before,
.page-faq .expand-icon::after {
  content: "";
  position: absolute;
  background: var(--c-dust);
  transition: transform 200ms var(--ease), background 200ms var(--ease), opacity 200ms var(--ease);
}

.page-faq .expand-icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .expand-icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .expand-trigger[aria-expanded="true"] .expand-icon::before {
  background: var(--c-cyan);
}

.page-faq .expand-trigger[aria-expanded="true"] .expand-icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .expand-panel {
  border-top: 1px solid var(--faq-line-soft);
  background: var(--c-indigo);
}

.page-faq .expand-body {
  padding: 16px;
}

.page-faq .expand-body p {
  margin: 0;
  max-width: var(--faq-measure);
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-body);
}

.page-faq .faq-answer-steps {
  counter-reset: faqans;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-answer-steps li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
  overflow-wrap: break-word;
}

.page-faq .faq-answer-steps li::before {
  counter-increment: faqans;
  content: counter(faqans, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
}

/* ---------- 结尾行动 ---------- */

.page-faq .faq-outro {
  padding-bottom: 56px;
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-actions .btn {
  flex: 0 1 auto;
}

.page-faq .to-top {
  margin: 0 0 8px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-block {
    padding: 48px 0;
  }

  .page-faq .faq-head {
    padding: 44px 0 34px;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .expand-trigger {
    grid-template-columns: 52px minmax(0, 1fr) 18px;
    padding: 17px 20px;
    font-size: 17px;
  }

  .page-faq .expand-body {
    padding: 18px 20px 22px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-head {
    padding: 56px 0 42px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 44px;
  }

  .page-faq .faq-figure {
    position: sticky;
    top: calc(var(--bar-h) + 56px);
  }

  .page-faq .faq-figure--wide {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .expand-trigger::before,
  .page-faq .expand-icon::before,
  .page-faq .expand-icon::after,
  .page-faq .expand-group,
  .page-faq .filter-chip,
  .page-faq .prose a,
  .page-faq .faq-note a,
  .page-faq .data-value a {
    transition: none;
  }
}
<<<END>>>