.page-faq {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 60px) 0 clamp(22px, 4vw, 48px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 560px;
  pointer-events: none;
  background:
    radial-gradient(48% 58% at 16% 8%, rgba(63, 240, 214, .16), transparent 70%),
    radial-gradient(42% 54% at 84% 0%, rgba(255, 79, 163, .14), transparent 72%),
    radial-gradient(36% 46% at 62% 40%, rgba(255, 194, 75, .08), transparent 74%);
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: end;
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .78fr);
    gap: 46px;
  }
}

.page-faq .faq-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-crumb a:hover {
  color: var(--cyan);
  border-bottom-color: rgba(63, 240, 214, .5);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-hero .lead {
  max-width: 54ch;
  color: rgba(234, 242, 255, .82);
}

.page-faq .faq-search {
  margin-top: 26px;
  max-width: 520px;
}

.page-faq .faq-search-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-hero-media {
  border-radius: var(--r-lg);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-bottom: clamp(48px, 7vw, 96px);
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 246px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  padding: 16px 14px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 26, 51, .92), rgba(11, 16, 32, .62));
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: 22px;
  }
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  padding-left: 4px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

@media (min-width: 1024px) {
  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-left: 2px solid transparent;
  border-radius: 10px;
  color: var(--mist);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index-link:hover {
  background: rgba(63, 240, 214, .07);
  color: var(--white);
}

.page-faq .faq-index-link.is-active,
.page-faq .faq-index-link[aria-current] {
  background: rgba(63, 240, 214, .1);
  border-left-color: var(--cyan);
  color: var(--white);
}

.page-faq .faq-index-num {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
}

.page-faq .faq-index-list > li:nth-child(3n+1) .faq-index-num { color: var(--cyan); }
.page-faq .faq-index-list > li:nth-child(3n+2) .faq-index-num { color: var(--magenta); }
.page-faq .faq-index-list > li:nth-child(3n+3) .faq-index-num { color: var(--amber); }

.page-faq .faq-index-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  --accent: var(--cyan);
  scroll-margin-top: 26px;
  min-width: 0;
}

.page-faq .faq-group:nth-of-type(3n+1) { --accent: var(--cyan); }
.page-faq .faq-group:nth-of-type(3n+2) { --accent: var(--magenta); }
.page-faq .faq-group:nth-of-type(3n+3) { --accent: var(--amber); }

.page-faq .faq-group-head {
  display: flex;
  align-items: stretch;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 4px;
}

.page-faq .faq-group-bar {
  flex: none;
  width: 5px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent), rgba(11, 16, 32, 0));
  box-shadow: 0 0 16px -3px var(--accent);
}

.page-faq .faq-group-title {
  align-self: center;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--white);
  transition: color .25s var(--ease);
}

.page-faq .faq-group-count {
  align-self: center;
  margin-left: auto;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .faq-group:target .faq-group-title {
  color: var(--accent);
}

/* ---------- 问题条目 ---------- */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .faq-item:hover::before { opacity: .35; }

.page-faq .faq-item:has(.faq-q[aria-expanded="true"])::before,
.page-faq .faq-item.is-open::before {
  opacity: 1;
  box-shadow: 0 0 14px -2px var(--accent);
}

.page-faq .faq-q-wrap {
  margin: 0;
  font: inherit;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 22px;
  gap: 10px;
  align-items: start;
  width: 100%;
  padding: 16px 6px 16px 16px;
  border: 0;
  border-radius: var(--r-sm);
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background .2s var(--ease);
}

.page-faq .faq-q:hover { background: rgba(154, 169, 199, .06); }

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-num {
  padding-top: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--accent);
}

.page-faq .faq-q-text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .faq-sign {
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 4px;
}

.page-faq .faq-sign::before,
.page-faq .faq-sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 2px;
  background: var(--mist);
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease), background .25s var(--ease);
}

.page-faq .faq-sign::before { width: 14px; height: 2px; }
.page-faq .faq-sign::after { width: 2px; height: 14px; }

.page-faq .faq-q[aria-expanded="true"] .faq-sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-q[aria-expanded="true"] .faq-sign::before {
  background: var(--accent);
}

/* ---------- 答案 ---------- */
.page-faq .faq-a {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .25s var(--ease), opacity .25s var(--ease);
}

.page-faq .faq-item:has(.faq-q[aria-expanded="true"]) .faq-a,
.page-faq .faq-item.is-open .faq-a {
  max-height: 780px;
  opacity: 1;
}

.page-faq .faq-a p {
  max-width: 68ch;
  margin: 0;
  padding: 0 28px 20px 66px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-a p + p { padding-top: 4px; }

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 240, 214, .35);
  transition: border-color .2s var(--ease);
}

.page-faq .faq-a a:hover { border-bottom-color: var(--cyan); }

.page-faq .faq-a .mono {
  color: var(--amber);
  font-size: 14px;
}

/* ---------- 章节配图 ---------- */
.page-faq .faq-media {
  margin: 26px 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

/* ---------- 显现动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a,
  .page-faq .faq-sign::before,
  .page-faq .faq-sign::after,
  .page-faq .faq-item::before {
    transition: none;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-q {
    grid-template-columns: 32px minmax(0, 1fr) 20px;
    gap: 8px;
    padding: 15px 4px 15px 12px;
  }

  .page-faq .faq-q-text { font-size: 15px; }

  .page-faq .faq-a p {
    padding: 0 12px 18px 44px;
    font-size: 14.5px;
  }

  .page-faq .faq-group-head { gap: 10px; }

  .page-faq .faq-index { padding: 13px 11px 10px; }
}
<<<END>>>