.page-faq {
  --faq-gap: clamp(1rem, 2.6vw, 1.75rem);
  --faq-radius: 2px;
  --faq-ink-soft: var(--c-night);
}

.page-faq .crumbs {
  margin-block: 1.1rem 1.6rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, var(--c-deep) 0%, var(--c-abyss) 72%);
  color: var(--c-cloud);
  padding: clamp(1.7rem, 5vw, 3.4rem) clamp(1.15rem, 4vw, 3rem);
  border-radius: var(--faq-radius);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: 58px 58px;
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 40ch;
}

.page-faq .faq-hero h1 {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 6.6vw, 4.1rem);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lead {
  margin: 1.15rem 0 0;
  max-width: 34ch;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.9rem;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 1.15rem 0 0;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-signal);
  letter-spacing: 0.02em;
}

.page-faq .faq-stat__k {
  font-size: 0.8rem;
  color: var(--c-mist);
}

/* ---------- 索引导语 ---------- */
.page-faq .faq-lede {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(2rem, 4.5vw, 3.2rem);
}

.page-faq .faq-lede__text p {
  margin: 0 0 0.9rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-figure {
  margin: 0;
  padding: 8px;
  background: var(--c-paper);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .faq-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--c-slate);
}

.page-faq .faq-figure--dark {
  margin-top: 1.25rem;
  background: var(--c-cloud);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.9rem);
  margin-top: clamp(2rem, 4.5vw, 3.4rem);
}

.page-faq .faq-col {
  min-width: 0;
  overflow-wrap: anywhere;
}

/* ---------- 左侧分类轨道 ---------- */
.page-faq .faq-rail {
  background: var(--c-night);
  color: var(--c-cloud);
  padding: 1.3rem 1.15rem 1.45rem;
  border-top: 3px solid var(--c-signal);
  border-radius: var(--faq-radius);
}

.page-faq .faq-rail__title {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__list li + li {
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-rail__list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
  padding: 0.68rem 0.2rem;
  color: inherit;
  text-decoration: none;
  transition: color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--c-cyan);
  transform: translateX(3px);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--c-signal);
  letter-spacing: 0.06em;
}

.page-faq .faq-rail__name {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-mist);
}

.page-faq .faq-rail__note {
  margin: 1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .faq-rail__note .tag {
  display: inline-block;
  margin-right: 0.5rem;
  vertical-align: 1px;
}

/* ---------- 区块标题 ---------- */
.page-faq .faq-sec {
  margin-top: clamp(2.2rem, 5vw, 3.4rem);
}

.page-faq .faq-sec:first-child {
  margin-top: 0;
}

.page-faq .faq-sec__title {
  margin: 0.35rem 0 0.95rem;
  font-size: clamp(1.45rem, 3.8vw, 2.25rem);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-deep);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-acc {
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-item {
  background: var(--c-cloud);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-signal);
  border-radius: var(--faq-radius);
  transition: box-shadow var(--fast) var(--ease), background-color var(--fast) var(--ease);
}

.page-faq .faq-item[open] {
  background: #ffffff;
  box-shadow: 0 16px 30px -24px rgba(11, 30, 45, 0.65);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--c-slate);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--c-signal);
}

.page-faq .faq-item__num {
  padding-top: 0.18rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-signal);
}

.page-faq .faq-item__q {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-deep);
}

.page-faq .faq-item__body {
  padding: 0 1rem 1.1rem 1rem;
}

.page-faq .faq-steps {
  margin: 0.2rem 0 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.45rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__note {
  margin: 0.8rem 0 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--c-paper);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--c-night);
}

/* ---------- 版本对照 ---------- */
.page-faq .faq-versions {
  background: var(--c-paper);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  padding: clamp(1.3rem, 4vw, 2.4rem);
}

.page-faq .faq-versions__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-compare {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.35rem;
}

.page-faq .faq-compare__col {
  background: var(--c-deep);
  color: var(--c-cloud);
  padding: 1.1rem 1.05rem 1.2rem;
  border-top: 3px solid var(--c-cyan);
  border-radius: var(--faq-radius);
}

.page-faq .faq-compare__col--now {
  border-top-color: var(--c-signal);
}

.page-faq .faq-compare__ver {
  margin: 0.65rem 0 0;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .faq-compare__col ul {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.88rem;
  line-height: 1.6;
}

.page-faq .faq-compare__col li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5rem;
  color: var(--c-cloud);
}

.page-faq .faq-compare__col li::before {
  content: "—";
  color: var(--c-cyan);
}

.page-faq .faq-compare__diff {
  margin: 1.15rem 0 0;
  padding-left: 0.9rem;
  border-left: 3px solid var(--c-signal);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 平台差异 ---------- */
.page-faq .faq-platforms__grid {
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-plat {
  background: var(--c-cloud);
  border: 1px solid var(--line);
  border-top: 2px solid var(--c-night);
  border-radius: var(--faq-radius);
  padding: 1.05rem 1.1rem 1.15rem;
}

.page-faq .faq-plat h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-deep);
}

.page-faq .faq-plat p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-platforms__note {
  margin: 0.9rem 0 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--c-slate);
}

/* ---------- 纠错与支持 ---------- */
.page-faq .faq-support {
  margin-top: clamp(2.2rem, 5vw, 3.4rem);
  padding: clamp(1.4rem, 4.5vw, 2.6rem);
  background: linear-gradient(168deg, var(--c-deep) 0%, var(--c-abyss) 100%);
  color: var(--c-cloud);
  border-radius: var(--faq-radius);
}

.page-faq .faq-support .faq-sec__title {
  color: var(--c-cloud);
  margin-bottom: 0;
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 1.15rem;
  margin-top: 1.5rem;
}

.page-faq .faq-channel {
  border-top: 2px solid var(--c-signal);
  padding-top: 0.9rem;
}

.page-faq .faq-channel h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-cloud);
}

.page-faq .faq-channel p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-channel__mail {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-faq .faq-support__meta {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--c-mist);
}

.page-faq .faq-support__more {
  margin: 0.7rem 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-support__more a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq .faq-support__more a:hover,
.page-faq .faq-support__more a:focus-visible {
  color: var(--c-signal);
  border-bottom-color: var(--c-signal);
}

.page-faq .faq-item {
  scroll-margin-top: calc(var(--topbar) + 1.5rem);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-lede {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-platforms__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-item summary {
    padding: 1rem 1.15rem;
  }

  .page-faq .faq-item__body {
    padding: 0 1.15rem 1.2rem 2.85rem;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 288px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--topbar) + 1.5rem);
    align-self: start;
  }

  .page-faq .faq-hero__inner {
    max-width: 46ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__list a,
  .page-faq .faq-item,
  .page-faq .faq-support__more a {
    transition: none;
  }

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