.page-faq {
  --faq-answer-w: 58ch;
  --faq-side-w: 236px;
  display: block;
  background: var(--void);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 48px;
  border-bottom: 1px solid var(--edge-soft);
  background:
    repeating-linear-gradient(180deg, rgba(79, 240, 220, 0.04) 0 1px, transparent 1px 5px),
    radial-gradient(115% 90% at 88% -20%, rgba(124, 107, 255, 0.22), transparent 62%),
    radial-gradient(85% 70% at 4% 6%, rgba(79, 240, 220, 0.10), transparent 60%);
}

.page-faq .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-size: clamp(29px, 7vw, 54px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.025em;
  color: var(--text);
}

.page-faq .hero-lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-fact {
  display: block;
  padding: 16px 18px 18px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--edge), inset 3px 0 0 0 var(--accent, var(--cyan));
}

.page-faq .faq-fact:nth-child(1) { --accent: var(--cyan); }
.page-faq .faq-fact:nth-child(2) { --accent: var(--violet); }
.page-faq .faq-fact:nth-child(3) { --accent: var(--amber); }

.page-faq .faq-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-fact-label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-block: 36px 72px;
}

/* ---------- 侧边目录 ---------- */
.page-faq .faq-side-title {
  display: none;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-toc ul {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-toc li {
  flex: 0 0 auto;
}

.page-faq .faq-toc a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 13.5px;
  color: var(--muted);
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--edge);
  transition: color 0.2s var(--ease), box-shadow 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-toc a .idx {
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq .faq-toc a:hover {
  color: var(--text);
}

.page-faq .faq-toc a.is-current {
  color: var(--text);
  background: var(--cyan-veil);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-faq .faq-toc a.is-current .idx {
  color: var(--cyan);
}

.page-faq .faq-side-cta {
  display: none;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  --accent: var(--cyan);
  scroll-margin-top: calc(var(--header-h-stuck) + 22px);
  margin-bottom: 54px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 40px;
}

.page-faq #g-timeline { --accent: var(--violet); }
.page-faq #g-specs { --accent: var(--cyan); }
.page-faq #g-filter { --accent: var(--amber); }
.page-faq #g-alerts { --accent: var(--violet); }
.page-faq #g-vendor { --accent: var(--amber); }
.page-faq #g-cadence { --accent: var(--cyan); }

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 16px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-group-no {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 5vw, 27px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-group-sub {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 4px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--edge);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 24px 12px 14px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
  border-top: 1px solid var(--edge-soft);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--edge-soft);
  box-shadow: inset 2px 0 0 0 transparent;
  transition: box-shadow 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa:first-of-type {
  border-top: 1px solid var(--edge-soft);
  margin-top: 22px;
}

.page-faq .qa[open] {
  box-shadow: inset 2px 0 0 0 var(--accent);
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.035), transparent 62%);
}

.page-faq .qa-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0 14px;
  padding: 15px 4px 15px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-q::after {
  content: "+";
  align-self: center;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--accent);
}

.page-faq .qa[open] .qa-q::after {
  content: "–";
}

.page-faq .qa-no {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .qa-text {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .qa-a {
  max-width: var(--faq-answer-w);
  padding: 0 6px 20px 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-faq .qa-a p + p {
  margin-top: 10px;
}

.page-faq .qa-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

.page-faq .qa-a a:hover {
  color: var(--cyan-dim);
}

.page-faq .qa-chip {
  display: inline-block;
  padding: 1px 8px;
  margin: 0 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 0 0 1px var(--edge);
  white-space: nowrap;
}

/* ---------- 结尾 ---------- */
.page-faq .faq-outro {
  position: relative;
  padding: 28px 22px 26px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--edge), inset 0 3px 0 0 var(--cyan);
}

.page-faq .faq-outro-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 4.6vw, 25px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-outro p {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .faq-outro-note {
  font-size: 12.5px;
  color: var(--muted);
  opacity: 0.86;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .qa-a {
    padding-left: 44px;
  }

  .page-faq .qa-q {
    padding-left: 18px;
  }

  .page-faq .faq-outro {
    padding: 34px 32px 30px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 64px) 0 60px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: 64px;
    padding-block: 58px 104px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h-stuck) + 28px);
    align-self: start;
    max-height: calc(100vh - var(--header-h-stuck) - 56px);
    overflow-y: auto;
  }

  .page-faq .faq-side-title {
    display: block;
  }

  .page-faq .faq-toc ul {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-toc li {
    flex: none;
  }

  .page-faq .faq-toc a {
    padding: 9px 0 9px 14px;
    white-space: normal;
    background: none;
    box-shadow: inset 2px 0 0 0 var(--edge);
    font-size: 13.5px;
    line-height: 1.5;
  }

  .page-faq .faq-toc a:hover {
    box-shadow: inset 2px 0 0 0 var(--muted);
  }

  .page-faq .faq-toc a.is-current {
    background: linear-gradient(90deg, var(--cyan-veil), transparent 78%);
    box-shadow: inset 2px 0 0 0 var(--cyan);
  }

  .page-faq .faq-side-cta {
    display: block;
    margin-top: 26px;
    padding: 16px 16px 18px;
    background: var(--panel);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
    box-shadow: inset 0 0 0 1px var(--edge);
  }

  .page-faq .faq-side-cta p {
    margin: 0 0 12px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--muted);
  }

  .page-faq .qa-text {
    font-size: 15.5px;
  }

  .page-faq .qa-a {
    font-size: 15px;
  }

  .page-faq .faq-group {
    margin-bottom: 68px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-side-w: 252px;
  }

  .page-faq .qa-q {
    padding-block: 17px;
  }
}