.page-faq {
  background: var(--arena);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 52px) 0 40px;
  background:
    radial-gradient(110% 85% at 10% 0%, rgba(139, 92, 246, .24), transparent 58%),
    radial-gradient(85% 70% at 92% 8%, rgba(200, 255, 60, .11), transparent 62%),
    var(--arena);
  overflow: hidden;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(242, 237, 227, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 237, 227, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(90% 80% at 45% 0%, #000, transparent 76%);
  mask-image: radial-gradient(90% 80% at 45% 0%, #000, transparent 76%);
  pointer-events: none;
}
.page-faq .faq-hero__inner { position: relative; z-index: 1; }

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
  font-size: 13px;
  color: rgba(242, 237, 227, .55);
}
.page-faq .breadcrumbs a {
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-faq .breadcrumbs a:hover { color: var(--neon); }

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 16em;
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
}
.page-faq .faq-hero__lede {
  max-width: 42em;
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 237, 227, .74);
}
.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-faq .faq-hero__mark {
  display: none;
  position: absolute;
  right: 4px;
  top: 88px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: rgba(242, 237, 227, .3);
}
@media (min-width: 1000px) {
  .page-faq .faq-hero__mark { display: block; }
}

/* ---------- 分组标签带 ---------- */
.page-faq .group-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  scrollbar-width: none;
}
.page-faq .group-rail::-webkit-scrollbar { display: none; }
.page-faq .group-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 13px;
  color: rgba(242, 237, 227, .76);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.page-faq .group-chip .mono {
  font-size: 12px;
  color: var(--neon);
}
.page-faq .group-chip:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(200, 255, 60, .07);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 1000px) {
  .page-faq .faq-body { grid-template-columns: 258px minmax(0, 1fr); }
}

.page-faq .faq-side { display: none; }
@media (min-width: 1000px) {
  .page-faq .faq-side {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    padding: 44px 30px 44px 0;
  }
}
.page-faq .faq-side__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .32em;
  color: rgba(242, 237, 227, .42);
}
.page-faq .faq-index {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid var(--rule);
  font-size: 14px;
  color: rgba(242, 237, 227, .68);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-index .mono {
  font-size: 11px;
  color: var(--neon-dim);
}
.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-left-color: var(--neon);
  background: rgba(200, 255, 60, .07);
  color: var(--neon);
}
.page-faq .faq-side__note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 1px solid var(--rule);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(242, 237, 227, .38);
}

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

/* ---------- 分组区块 ---------- */
.page-faq .faq-group {
  padding: 42px 22px 46px;
  background-color: var(--deep);
  color: var(--paper);
}
@media (min-width: 1000px) {
  .page-faq .faq-group { padding: 52px 44px 58px; }
}
.page-faq .faq-group:last-child { padding-bottom: 64px; }

.page-faq .faq-group--dark {
  --fg: var(--paper);
  --fg-soft: rgba(242, 237, 227, .66);
  --line: var(--rule);
  --accent: var(--neon);
  --surface: rgba(255, 255, 255, .035);
  background-color: var(--deep);
  background-image: radial-gradient(90% 60% at 80% 0%, rgba(139, 92, 246, .16), transparent 68%);
  color: var(--paper);
}
.page-faq .faq-group--paper {
  --fg: var(--ink);
  --fg-soft: var(--ink-soft);
  --line: rgba(26, 29, 34, .16);
  --accent: var(--violet-deep);
  --surface: rgba(255, 255, 255, .58);
  background-color: var(--paper);
  background-image: none;
  color: var(--ink);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 4px 14px;
  margin-bottom: 24px;
}
.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--accent);
}
.page-faq .faq-group h2 {
  margin: 0;
  font-size: clamp(22px, 2.7vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--fg);
}
.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 6px 0 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-soft);
}

/* ---------- 图文组合 ---------- */
.page-faq .faq-split { display: grid; gap: 26px; }
@media (min-width: 880px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 32px;
    align-items: start;
  }
}
.page-faq .faq-figure { margin: 0; }
.page-faq .faq-figure--top { margin-bottom: 26px; }
.page-faq .faq-figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure .media-frame__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--fg-soft, rgba(242, 237, 227, .6));
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color .2s var(--ease);
}
.page-faq .faq-item + .faq-item { margin-top: 10px; }
.page-faq .faq-item[open] { border-color: var(--accent); }

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--fg);
  transition: color .2s var(--ease);
}
.page-faq .faq-item summary::-webkit-details-marker { display: none; }
.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible { color: var(--accent); }

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  color: var(--accent);
}
.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}
.page-faq .faq-item__icon::before { left: 0; top: 6px; width: 14px; height: 2px; }
.page-faq .faq-item__icon::after { left: 6px; top: 0; width: 2px; height: 14px; }
.page-faq .faq-item[open] .faq-item__icon::after { transform: scaleY(0); opacity: 0; }

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fg-soft);
  animation: faqReveal .3s var(--ease);
}
.page-faq .faq-item__a p { margin: 0; }
.page-faq .faq-item__a a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-copy {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a { animation: none; }
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after { transition: none; }
}
<<<END>>>