.page-faq {
  --faq-index-w: 268px;
  --faq-rule: 2px solid var(--ridge);
  --faq-hairline: 1px solid rgba(46, 92, 120, 0.6);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(22px, 4vw, 44px) clamp(28px, 5vw, 56px);
  background:
    radial-gradient(110% 130% at 8% 0%, rgba(46, 92, 120, 0.55) 0%, rgba(10, 31, 46, 0) 64%),
    var(--deep);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-hero-panel {
  margin-top: clamp(18px, 3vw, 30px);
  border: var(--faq-rule);
  background: var(--night);
  box-shadow: var(--shadow-hard-lg);
}

.page-faq .faq-hero-rule {
  height: 12px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--ridge) 0 1px,
    transparent 1px 16px
  );
  border-bottom: var(--faq-hairline);
}

.page-faq .faq-hero-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-hero-copy {
  padding: clamp(22px, 3.4vw, 40px);
}

.page-faq .faq-hero-copy h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.2vw, 48px);
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: var(--ice);
  max-width: 18em;
}

.page-faq .faq-lede {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-hero-stats {
  padding: clamp(20px, 3vw, 32px);
  border-top: var(--faq-hairline);
  background: rgba(10, 31, 46, 0.45);
}

.page-faq .faq-stats-label {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-stat-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(46, 92, 120, 0.7);
}

.page-faq .faq-stat-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-stat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--sunset);
  letter-spacing: 0.02em;
}

.page-faq .faq-stat-name {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 60px);
  padding-block: clamp(36px, 6vw, 84px);
  align-items: start;
}

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

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  padding: 10px 14px;
  border: 1px solid var(--ridge);
  background: var(--card);
  color: var(--ice);
  font-size: 15px;
  line-height: 1.3;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.page-faq .faq-index-link:hover {
  background: var(--dusk);
  border-color: var(--neon);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-index-link[aria-current] {
  background: var(--sunset);
  border-color: var(--sunset);
  color: var(--ink);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  opacity: 0.9;
}

/* ---------- 分组 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 104px;
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(38px, 6vw, 76px);
  padding-top: clamp(30px, 4vw, 52px);
  border-top: 1px dashed rgba(46, 92, 120, 0.7);
}

.page-faq .faq-section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: var(--faq-rule);
  margin-bottom: 20px;
}

.page-faq .faq-section-index {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--sunset);
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.page-faq .faq-section-lede {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: var(--faq-rule);
  background: var(--card);
  transition: background-color 180ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.page-faq .faq-item:hover {
  background: var(--dusk);
}

.page-faq .faq-item[open] {
  background: var(--dusk);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--ice);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -3px;
}

.page-faq .faq-q-icon {
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--sunset);
  border-bottom: 2px solid var(--sunset);
  transform: rotate(45deg);
  transition: transform 200ms ease, border-color 200ms ease;
}

.page-faq .faq-item[open] .faq-q-icon {
  transform: rotate(-135deg);
  border-color: var(--neon);
}

.page-faq .faq-a {
  padding: 14px 18px 18px;
  border-top: var(--faq-hairline);
  font-size: 16px;
  line-height: 1.88;
  color: var(--mist);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
  max-width: 60ch;
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

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

.page-faq .faq-steps {
  list-style: none;
  margin: 4px 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: faq-step;
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: var(--sunset);
  border: 1px solid var(--sunset);
  background: rgba(244, 129, 60, 0.08);
}

.page-faq .faq-steps li > span {
  padding-top: 3px;
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
  border: var(--faq-rule);
  background: var(--night);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-figure-media {
  border-bottom: var(--faq-hairline);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 桌面两栏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero-body {
    grid-template-columns: minmax(0, 1fr) 296px;
  }

  .page-faq .faq-hero-stats {
    border-top: 0;
    border-left: var(--faq-hairline);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    padding-left: 16px;
    border-left: var(--faq-rule);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    border-color: transparent;
    background: transparent;
    padding: 9px 10px;
  }

  .page-faq .faq-index-link[aria-current] {
    border-color: var(--sunset);
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-index-w: 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .faq-item,
  .page-faq .faq-q-icon {
    transition: none;
  }
}
<<<END>>>