.page-faq {
  --faq-gap: clamp(16px, 3vw, 30px);
  --faq-pad: clamp(18px, 3vw, 28px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-block: 18px 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(22px, 5vw, 46px) clamp(24px, 4vw, 40px);
  border-bottom: 2px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(0deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.35;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(520px, 62%);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(200, 255, 60, 0.14), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin-top: 16px;
  max-width: 58ch;
  color: var(--muted);
}

/* ---------- 信息带 ---------- */
.page-faq .faq-meter {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 4vw, 32px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-meter__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
  background: var(--bg-alt);
}

.page-faq .faq-meter__value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-meter__cell:first-child .faq-meter__value {
  color: var(--accent);
}

.page-faq .faq-meter__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-block: clamp(20px, 4vw, 34px) clamp(48px, 8vw, 92px);
}

.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
  min-width: 0;
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--accent);
  padding-top: 10px;
  min-width: 0;
}

.page-faq .faq-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 240ms var(--ease), border-color 240ms var(--ease), background-color 240ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

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

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--accent-2);
}

/* ---------- 分组卡片 ---------- */
.page-faq .faq-group {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  padding: var(--faq-pad);
  scroll-margin-top: 96px;
}

.page-faq .faq-group:nth-child(even) {
  background: var(--surface);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 6px;
  margin-bottom: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  padding-top: 0.3em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--accent-2);
}

.page-faq .faq-group__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-group__note {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 52ch;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-group__note a {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

.page-faq .accordion__item:first-child {
  border-top: 0;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 15px 0;
  margin: 0;
  border: 0;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 240ms var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--accent);
}

.page-faq .accordion__trigger[aria-expanded="true"] {
  color: var(--accent);
}

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

.page-faq .accordion__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-left: auto;
  margin-top: 0.42em;
  color: var(--accent);
}

.page-faq .accordion__sign::before,
.page-faq .accordion__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: currentColor;
  transform: translateY(-50%);
  transition: transform 240ms var(--ease), opacity 240ms var(--ease);
}

.page-faq .accordion__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__sign::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .accordion__body {
  max-width: 62ch;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .accordion__body p {
  margin: 0 0 12px;
}

.page-faq .accordion__body p:last-child {
  margin-bottom: 14px;
}

.page-faq .accordion__body a {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-actions {
  margin: 4px 0 14px;
}

.page-faq .faq-hint {
  margin: 0 0 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 图像 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-figure__frame {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-band {
  margin: 0;
}

.page-faq .faq-band__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  overflow: hidden;
}

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

.page-faq .media__caption {
  margin-top: 10px;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__sign::before,
  .page-faq .accordion__sign::after,
  .page-faq .accordion__trigger,
  .page-faq .faq-rail__link {
    transition: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-meter {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 52px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid var(--line);
    font-size: 0.875rem;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--accent);
    background: var(--glass);
  }
}
<<<END>>>