.page-faq {
  --faq-rail: 264px;
  --faq-gap: clamp(24px, 4vw, 56px);
  background: var(--space);
  color: var(--silver);
}

/* ---------- 面包屑与页头 ---------- */
.page-faq .breadcrumb {
  padding-top: 22px;
}

.page-faq .faq-head {
  position: relative;
  padding: 16px 0 clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(52%, 340px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal), var(--violet));
  opacity: .75;
}

.page-faq .faq-head .display {
  margin: 14px 0 18px;
  max-width: 15em;
  font-size: clamp(29px, 5vw, 46px);
  line-height: 1.22;
  letter-spacing: .02em;
}

.page-faq .faq-head__lede {
  max-width: 34em;
  margin: 0;
  color: var(--dim);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-block: clamp(28px, 4vw, 44px) clamp(48px, 7vw, 84px);
}

@media (min-width: 940px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }
}

/* ---------- 左侧分类栏 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 20px;
  align-content: start;
  min-width: 0;
}

@media (min-width: 940px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
  }
}

.page-faq .faq-cat__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-cat__link {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 3px 10px;
  padding: 13px 6px 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--silver);
  text-decoration: none;
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-cat__link:hover,
.page-faq .faq-cat__link:focus-visible {
  color: var(--gold);
  transform: translateX(5px);
}

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

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gold);
  padding-top: 2px;
}

.page-faq .faq-cat__name {
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: .02em;
}

.page-faq .faq-cat__meta {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.55;
  letter-spacing: .03em;
  color: var(--dimmer);
}

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

.page-faq .faq-rail__figure .media__frame {
  aspect-ratio: 10 / 7;
}

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

/* ---------- 主体列 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(40px, 6vw, 72px);
  min-width: 0;
}

.page-faq .faq-cat {
  --cat-accent: var(--teal);
  min-width: 0;
  scroll-margin-top: 20px;
}

.page-faq .faq-cat--entry { --cat-accent: var(--teal); }
.page-faq .faq-cat--install { --cat-accent: var(--gold); }
.page-faq .faq-cat--switch { --cat-accent: var(--violet); }
.page-faq .faq-cat--feedback { --cat-accent: var(--eclipse); }

.page-faq .faq-cat__head {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 8px;
  align-items: baseline;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-cat__index {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cat-accent);
}

.page-faq .faq-cat__head .h2 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: clamp(21px, 2.6vw, 27px);
  letter-spacing: .03em;
  line-height: 1.35;
}

.page-faq .faq-cat__lede {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

.page-faq .faq-cat__figure {
  margin: 0 0 22px;
}

.page-faq .faq-cat__figure .media__frame {
  aspect-ratio: 3 / 2;
}

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

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

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 20px;
  align-items: start;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 3px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dimmer);
  padding-top: 4px;
}

.page-faq .qa__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .01em;
  color: var(--silver);
  transition: color .18s var(--ease);
}

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

.page-faq .qa__mark {
  justify-self: end;
  align-self: start;
  width: 17px;
  height: 17px;
  margin-top: 5px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background-image: radial-gradient(circle at 34% 34%, var(--cat-accent) 0 3px, transparent 3.5px);
  opacity: .55;
  transition: opacity .2s var(--ease), border-color .2s var(--ease), background-image .25s var(--ease);
}

.page-faq .qa__summary:hover .qa__mark {
  opacity: .9;
}

.page-faq .qa[open] .qa__mark {
  opacity: 1;
  border-color: var(--cat-accent);
  background-image: radial-gradient(circle at 50% 50%, var(--cat-accent) 0 7px, transparent 7.5px);
}

.page-faq .qa__answer {
  padding: 0 10px 24px 60px;
  animation: faq-fade .24s var(--ease);
}

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

.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 9px;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .steps__item {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.6px;
  line-height: 1.78;
  color: var(--dim);
}

.page-faq .steps__item::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--cat-accent, var(--gold));
  padding-top: 4px;
}

.page-faq .qa__hint {
  margin: 0;
  padding: 9px 0 0 12px;
  border-left: 2px solid var(--cat-accent, var(--gold));
  font-size: 13.6px;
  line-height: 1.75;
  color: var(--dimmer);
}

/* ---------- 收束区 ---------- */
.page-faq .faq-tail {
  position: relative;
  overflow: hidden;
  margin-top: clamp(8px, 2vw, 16px);
  padding: clamp(26px, 4vw, 44px) clamp(20px, 4vw, 40px);
  background: var(--midnight);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.page-faq .faq-tail::before {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 123, 216, .20), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-tail__inner {
  position: relative;
  z-index: 1;
  max-width: 46em;
}

.page-faq .faq-tail .h2 {
  margin: 10px 0 14px;
  font-size: clamp(21px, 2.8vw, 28px);
  letter-spacing: .02em;
  line-height: 1.4;
}

.page-faq .faq-tail p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dim);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .faq-tail__facts {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--dimmer);
}

.page-faq .faq-tail__facts li {
  position: relative;
  padding-left: 14px;
}

.page-faq .faq-tail__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 620px) {
  .page-faq .faq-cat__head {
    grid-template-columns: 30px minmax(0, 1fr);
    column-gap: 10px;
  }

  .page-faq .qa__summary {
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    gap: 10px;
    padding: 14px 0;
  }

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

  .page-faq .qa__mark {
    width: 15px;
    height: 15px;
  }

  .page-faq .qa__answer {
    padding: 0 0 20px 40px;
  }

  .page-faq .steps__item {
    font-size: 14.2px;
  }
}

@media (max-width: 380px) {
  .page-faq .qa__answer {
    padding-left: 0;
  }

  .page-faq .faq-tail__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__answer {
    animation: none;
  }

  .page-faq .qa__summary,
  .page-faq .qa__q,
  .page-faq .qa__mark,
  .page-faq .faq-cat__link {
    transition: none;
  }

  .page-faq .faq-cat__link:hover,
  .page-faq .faq-cat__link:focus-visible {
    transform: none;
  }
}
<<<END>>>