.page-faq {
  --faq-rail: 288px;
  background: var(--paper);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(26px, 5vw, 54px) 0 clamp(30px, 5vw, 58px);
  border-bottom: 4px solid var(--signal);
}

.page-faq .faq-hero .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--line);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-hero .breadcrumb a:hover {
  border-bottom-color: var(--signal);
  color: var(--paper);
}

.page-faq .faq-hero .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--muted);
}

.page-faq .faq-hero .breadcrumb li[aria-current] {
  color: var(--signal);
}

.page-faq .faq-hero .eyebrow {
  color: var(--signal);
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-faq .faq-lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: rgba(247, 242, 232, 0.82);
}

.page-faq .faq-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 30px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid rgba(217, 224, 228, 0.22);
  list-style: none;
}

.page-faq .faq-metrics li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--line);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-metrics b {
  margin-right: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--signal);
}

/* ============ 筛选条 ============ */
.page-faq .faq-filter {
  background: var(--card);
  border-bottom: var(--hair);
}

.page-faq .faq-filter .filter-bar {
  display: flex;
  gap: 8px;
  padding: 14px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-filter .chip {
  flex: 0 0 auto;
  white-space: nowrap;
  border-radius: 0;
}

/* ============ 双栏排查布局 ============ */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(44px, 6vw, 84px);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, var(--faq-rail)) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
  }
}

/* ============ 左侧索引栏 ============ */
.page-faq .rail-card {
  padding: 20px;
  background: var(--card);
  border: var(--hair);
}

.page-faq .rail-card + .rail-card {
  margin-top: 16px;
}

.page-faq .rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .rail-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .rail-list li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-faq .rail-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .rail-list li:first-child {
  padding-top: 0;
}

.page-faq .rail-list .idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--signal);
  padding-top: 2px;
}

.page-faq .legend {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .legend-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-faq .legend-dot {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 6px;
}

.page-faq .legend-dot--pass {
  background: var(--pass);
}

.page-faq .legend-dot--warn {
  background: var(--warn);
}

.page-faq .rail-card--signal {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-faq .rail-card--signal .rail-title {
  color: var(--signal);
}

.page-faq .rail-card--signal p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 242, 232, 0.8);
}

/* ============ 右侧步骤流 ============ */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-group {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 16px 0 0;
  padding-bottom: 10px;
  border-bottom: 1.5px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 23px);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .g-code {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-faq .faq-group-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* 折叠卡片 */
.page-faq .fix-card {
  background: var(--card);
  border: var(--hair);
  border-left: 3px solid var(--line);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .fix-card[open] {
  border-left-color: var(--signal);
  background: #FFFFFF;
  box-shadow: var(--shade);
}

.page-faq .fix-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
}

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

.page-faq .fix-code {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-faq .fix-title {
  order: 2;
  flex: 1 1 100%;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.page-faq .fix-summary .tag {
  order: 3;
  margin-left: auto;
  flex: none;
}

.page-faq .fix-chev {
  order: 4;
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .fix-card[open] .fix-chev {
  transform: rotate(-135deg);
  border-color: var(--signal);
}

@media (min-width: 760px) {
  .page-faq .fix-title {
    order: 0;
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-faq .fix-summary .tag {
    margin-left: 0;
  }
}

.page-faq .fix-body {
  padding: 16px 18px 20px;
  border-top: 1px dashed var(--line);
}

.page-faq .fix-steps {
  display: block;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: fixstep;
}

.page-faq .fix-steps li {
  position: relative;
  counter-increment: fixstep;
  padding: 0 0 15px 34px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .fix-steps li:last-child {
  padding-bottom: 0;
}

.page-faq .fix-steps li::before {
  content: counter(fixstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--signal);
}

.page-faq .fix-note {
  margin: 18px 0 0;
  padding: 12px 14px;
  background: var(--signal-soft);
  border-left: 3px solid var(--signal);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-faq .fix-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* 旁注 */
.page-faq .faq-aside {
  margin: 6px 0;
  padding: 22px 24px;
  background: var(--ink-2);
  border-left: 3px solid var(--signal);
  color: rgba(247, 242, 232, 0.86);
}

.page-faq .aside-code {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-faq .faq-aside p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.88;
}

/* 图 */
.page-faq .faq-figure {
  margin: 6px 0;
}

.page-faq .faq-figure .media-frame {
  padding: 10px;
  background: var(--card);
  border: var(--hair);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-figure--phone {
  max-width: 430px;
}

/* 收尾 */
.page-faq .faq-cta {
  margin-top: 26px;
  padding: 26px 24px;
  background: var(--card);
  border: 1px solid var(--signal);
  border-left-width: 4px;
}

.page-faq .faq-cta-code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal-deep);
}

.page-faq .faq-cta h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.7vw, 27px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

@media (max-width: 560px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-metrics {
    gap: 8px 20px;
  }

  .page-faq .faq-figure--phone {
    max-width: none;
  }

  .page-faq .faq-aside {
    padding: 20px 18px;
  }

  .page-faq .faq-cta {
    padding: 22px 18px;
  }
}
<<<END>>>