.page-faq {
  --faq-jump-h: 52px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 0;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 80% at 12% -10%, rgba(11, 43, 38, 0.85), transparent 62%),
    linear-gradient(180deg, rgba(25, 27, 58, 0.45), rgba(7, 21, 39, 0) 62%);
}

.page-faq__h1 {
  margin: 16px 0 0;
  max-width: 24ch;
}

.page-faq__lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fog);
}

.page-faq__lede strong {
  color: var(--amber);
  font-weight: 500;
}

/* ---------- 分类索引墙 ---------- */
.page-faq__wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 138px;
  padding: 16px 14px 14px;
  background: var(--ink);
  border-left: 2px solid var(--accent, var(--lime));
  color: var(--fog);
  text-decoration: none;
  transition: background 220ms var(--ease), border-color 220ms var(--ease);
}

.page-faq .faq-tile:hover,
.page-faq .faq-tile:focus-visible {
  background: var(--accent-soft, rgba(198, 255, 62, 0.1));
}

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

.faq-tile--lime { --accent: var(--lime); --accent-soft: rgba(198, 255, 62, 0.1); }
.faq-tile--amber { --accent: var(--amber); --accent-soft: rgba(245, 184, 65, 0.1); }
.faq-tile--mint { --accent: var(--mint); --accent-soft: rgba(127, 227, 212, 0.1); }
.faq-tile--wine { --accent: #C4596F; --accent-soft: rgba(196, 89, 111, 0.12); }

.page-faq .faq-tile__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent, var(--lime));
}

.page-faq .faq-tile__title {
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-tile__desc {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-faq .faq-tile__count {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq__herofig {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

/* ---------- 常驻分类条 ---------- */
.page-faq__jump {
  position: sticky;
  top: var(--header-h-compact);
  z-index: 20;
  background: rgba(7, 21, 39, 0.94);
  border-bottom: 1px solid var(--line);
}

.page-faq__jump-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--faq-jump-h);
  padding-top: 8px;
  padding-bottom: 8px;
}

.page-faq__jump-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-faq__jump-list {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq__jump-list::-webkit-scrollbar {
  display: none;
}

.page-faq__jump-link {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 12.5px;
  color: var(--fog);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq__jump-link:hover,
.page-faq__jump-link:focus-visible {
  color: var(--lime);
  border-color: var(--line-strong);
}

.page-faq__totop {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease);
}

.page-faq__totop:hover,
.page-faq__totop:focus-visible {
  border-bottom-color: var(--mint);
}

/* ---------- 分组 ---------- */
.page-faq__group {
  padding: clamp(40px, 6vw, 80px) 0 0;
  scroll-margin-top: calc(var(--header-h-compact) + var(--faq-jump-h) + 12px);
}

.page-faq__group--tint {
  background: linear-gradient(180deg, rgba(25, 27, 58, 0.7), rgba(7, 21, 39, 0) 72%);
}

.page-faq__grid {
  display: grid;
  gap: 24px;
}

.page-faq__side {
  border-left: 1px solid var(--line);
  padding: 2px 0 2px 14px;
}

.page-faq__h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 5vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-faq__side-text {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq__list {
  display: flex;
  flex-direction: column;
}

.page-faq__list--closing {
  margin-top: 18px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line);
}

.page-faq .qa:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 34px 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--fog);
  transition: color 180ms var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--slate);
  transition: color 180ms var(--ease);
}

.page-faq .qa__q:hover {
  color: var(--mint);
}

.page-faq .qa[open] .qa__q {
  color: var(--lime);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
  color: var(--lime);
}

.page-faq .qa__num {
  flex: 0 0 26px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .qa__num::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: transparent;
  transition: background 180ms var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--lime);
}

.page-faq .qa[open] .qa__num::before {
  background: var(--lime);
}

.page-faq .qa__t {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__a {
  padding: 0 34px 20px 38px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .qa__a a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 227, 212, 0.4);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 数据章节配图 ---------- */
.page-faq__figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
  max-width: 540px;
}

/* ---------- 收尾 ---------- */
.page-faq__closing {
  margin-top: clamp(56px, 8vw, 104px);
  padding: clamp(40px, 6vw, 80px) 0 clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(11, 43, 38, 0.95), rgba(25, 27, 58, 0.92));
  scroll-margin-top: calc(var(--header-h-compact) + 12px);
}

.page-faq__closing-grid {
  display: grid;
  gap: 32px;
}

.page-faq__reach {
  border: 1px solid var(--line-strong);
  background: rgba(7, 21, 39, 0.66);
  padding: 22px 20px;
}

.page-faq__reach-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--fog);
}

.page-faq__reach dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq__reach dl > div {
  display: grid;
  gap: 3px;
}

.page-faq__reach dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-faq__reach dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--fog);
  word-break: break-word;
}

.page-faq__mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.page-faq__reach-note {
  margin: 18px 0 20px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq__wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq__grid {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq__side {
    position: sticky;
    top: calc(var(--header-h-compact) + var(--faq-jump-h) + 24px);
  }

  .page-faq__closing-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq__figure {
    margin-left: auto;
  }
}

@media (min-width: 1100px) {
  .page-faq__wall {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .faq-tile {
    min-height: 156px;
    padding: 18px 16px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tile,
  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .qa__num::before,
  .page-faq__jump-link,
  .page-faq__totop,
  .page-faq .qa__a a {
    transition: none;
  }
}
<<<END>>>