.page-faq {
  --faq-cyan-deep: #12807E;
  --faq-amber-deep: #9A6B00;
  --faq-grass-deep: #23804C;
  --faq-orange-deep: #C1490A;
  --faq-indigo-deep: #2B3D9B;
  --faq-rule: rgba(44, 52, 68, 0.14);
  --faq-rule-soft: rgba(44, 52, 68, 0.08);
  --faq-text: rgba(44, 52, 68, 0.86);
}

.page-faq [data-cat="data"] {
  --cat: var(--faq-cyan-deep);
}
.page-faq [data-cat="cadence"] {
  --cat: var(--faq-amber-deep);
}
.page-faq [data-cat="access"] {
  --cat: var(--faq-grass-deep);
}
.page-faq [data-cat="coop"] {
  --cat: var(--faq-orange-deep);
}
.page-faq [data-cat="info"] {
  --cat: var(--faq-indigo-deep);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 5.5vw, 72px) 0 clamp(44px, 6vw, 84px);
  color: var(--ink-text);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(47, 227, 224, 0.2) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(47, 227, 224, 0.14) 0 1px, transparent 1px 104px);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--amber-400) 55%, transparent);
  opacity: 0.7;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 16px;
}

.page-faq .faq-hero .breadcrumbs,
.page-faq .faq-hero .breadcrumbs a {
  color: rgba(232, 237, 247, 0.68);
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan-400);
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  color: rgba(232, 237, 247, 0.82);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--line-dark);
  padding: 14px;
  background: rgba(16, 26, 71, 0.5);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1px solid var(--cyan-400);
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__tag {
  position: absolute;
  top: -10px;
  right: 18px;
  z-index: 2;
  padding: 3px 10px;
  background: var(--amber-400);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

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

.page-faq .faq-hero__figure .figure__caption {
  color: rgba(232, 237, 247, 0.62);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: clamp(40px, 6vw, 84px) 0 clamp(48px, 6vw, 92px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

/* 左列索引 */
.page-faq .faq-rail__head {
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-500);
}

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

.page-faq .faq-rail__group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 4px;
  padding-left: 10px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--indigo-900);
}

.page-faq .faq-rail__dot {
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--cat, var(--indigo-600));
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 6px;
  padding: 7px 0 7px 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.5;
  color: var(--faq-text);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-500);
  padding-top: 2px;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-left-color: var(--cat, var(--indigo-600));
  background: var(--slate-100);
  color: var(--indigo-900);
}

.page-faq .faq-rail__link:hover .faq-rail__num,
.page-faq .faq-rail__link:focus-visible .faq-rail__num {
  color: var(--cat, var(--indigo-600));
}

/* 右列答案 */
.page-faq .faq-group {
  scroll-margin-top: 116px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: clamp(30px, 4vw, 46px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__index {
  flex: none;
  padding: 1px 8px;
  border: 1px solid var(--cat, var(--indigo-600));
  color: var(--cat, var(--indigo-600));
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--indigo-900);
}

.page-faq .faq-group__note {
  max-width: 56ch;
  margin: 12px 0 20px;
  font-family: var(--font-editorial);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate-500);
}

.page-faq .faq-item {
  padding: 20px 0 20px 22px;
  border-left: 2px solid transparent;
  scroll-margin-top: 116px;
  transition: background-color 260ms ease, border-color 260ms ease;
}

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

.page-faq .faq-item:target {
  border-left-color: var(--cat, var(--indigo-600));
  background: rgba(47, 227, 224, 0.1);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 800;
  line-height: 1.55;
  color: var(--indigo-900);
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cat, var(--indigo-600));
  padding-top: 5px;
}

.page-faq .faq-item__a {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-item__a + .faq-item__a {
  margin-top: 10px;
}

.page-faq .faq-mark {
  font-style: normal;
  font-weight: 600;
  color: var(--indigo-900);
  background: linear-gradient(180deg, transparent 62%, rgba(255, 198, 61, 0.55) 62%);
  padding: 0 2px;
}

.page-faq .faq-figure {
  margin: clamp(24px, 3vw, 34px) 0 0;
}

/* ---------- 底部条幅 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(42px, 5.4vw, 72px) 0;
  color: var(--ink-text);
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -8%;
  width: 58%;
  height: 260%;
  background: repeating-linear-gradient(100deg, rgba(47, 227, 224, 0.08) 0 2px, transparent 2px 24px);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}

.page-faq .faq-cta .eyebrow {
  color: var(--cyan-400);
}

.page-faq .faq-cta__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__text {
  max-width: 56ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(232, 237, 247, 0.8);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 116px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    padding-right: 8px;
    scrollbar-width: thin;
  }

  .page-faq .faq-item {
    padding-left: 26px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-rail__link {
    grid-template-columns: 22px minmax(0, 1fr);
    font-size: 13.5px;
  }

  .page-faq .faq-item {
    padding-left: 16px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-item {
    transition: none;
  }
}