.page-faq {
  --faq-accent: var(--mid);
  --faq-rule: rgba(185, 198, 206, .45);
}

.page-faq section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-accent-ember { --faq-accent: var(--ember); }
.page-faq .faq-accent-aurora { --faq-accent: var(--aurora); }
.page-faq .faq-accent-mid { --faq-accent: var(--mid); }
.page-faq .faq-accent-ice { --faq-accent: var(--ice); }
.page-faq .faq-accent-signal { --faq-accent: var(--signal); }

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ice);
  color: var(--paper);
  padding: calc(var(--header-h) + clamp(34px, 7vw, 78px)) 0 clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(185, 198, 206, .1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 198, 206, .1) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -58%;
  width: min(560px, 74vw);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(61, 220, 151, .3), transparent 62%);
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb-list,
.page-faq .faq-hero .breadcrumb-item,
.page-faq .faq-hero .breadcrumb-item a {
  color: var(--frost);
}

.page-faq .faq-hero .eyebrow {
  color: var(--aurora);
  margin-top: clamp(16px, 3vw, 26px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 6vw, 3.7rem);
  line-height: 1.06;
  letter-spacing: .005em;
  color: var(--paper);
  margin: .3em 0 .45em;
  max-width: 21ch;
}

.page-faq .faq-hero .lede {
  color: rgba(245, 247, 242, .82);
  max-width: 64ch;
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.85;
}

.page-faq .faq-toc {
  list-style: none;
  margin: clamp(26px, 5vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(185, 198, 206, .24);
  border-top: 1px solid rgba(185, 198, 206, .24);
  border-bottom: 1px solid rgba(185, 198, 206, .24);
}

.page-faq .faq-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  background: var(--ice);
  color: var(--paper);
  text-decoration: none;
  font-weight: 700;
  font-size: .96rem;
  transition: background .22s ease, color .22s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  background: var(--mid);
  color: var(--paper);
}

.page-faq .faq-toc span {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--aurora);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-block__aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .2em;
  color: var(--faq-accent);
}

.page-faq .faq-block__aside h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.14;
  color: var(--ink);
  margin: 0;
}

.page-faq .faq-block__aside p {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--faq-accent);
  color: var(--chalk);
  font-size: .92rem;
  line-height: 1.78;
}

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

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  letter-spacing: .04em;
  color: var(--faq-accent);
  line-height: 1.5;
}

.page-faq .faq-step h3 {
  margin: 0 0 6px;
  font-size: 1.03rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--chalk);
  font-size: .95rem;
  font-weight: 500;
  line-height: 1.8;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(22px, 3vw, 32px);
  border: 1px solid var(--faq-rule);
  background: var(--paper);
  box-shadow: var(--shadow-plate);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-rule);
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .02em;
  color: var(--chalk);
}

/* ---------- 分段切换 ---------- */
.page-faq .faq-tabs {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-faq .faq-tabs .tab-list {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--faq-rule);
  scrollbar-width: none;
}

.page-faq .faq-tabs .tab-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tabs .tab {
  flex: none;
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 12px 16px;
  margin-bottom: -1px;
  font-family: inherit;
  font-size: .93rem;
  font-weight: 700;
  color: var(--chalk);
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .faq-tabs .tab:hover {
  color: var(--ice);
}

.page-faq .faq-tabs .tab[aria-selected="true"] {
  color: var(--ice);
  border-bottom-color: var(--ember);
}

.page-faq .faq-tabs .tab-panel {
  padding: 16px 0 0;
  color: var(--ink);
  font-size: .96rem;
  line-height: 1.85;
  max-width: 68ch;
}

.page-faq .faq-tabs .tab-panel p {
  margin: 0;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(14px, 2.2vw, 19px) 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(1rem, 1.7vw, 1.1rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
  transition: color .2s ease;
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--mid);
}

.page-faq .faq-item summary::after {
  content: "";
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: .5em;
  margin-left: auto;
  border-right: 2px solid var(--faq-accent);
  border-bottom: 2px solid var(--faq-accent);
  transform: rotate(45deg);
  transition: transform .25s ease;
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-item[open] summary {
  color: var(--ice);
}

.page-faq .faq-answer {
  padding: 0 0 clamp(16px, 2.2vw, 22px);
  max-width: 68ch;
  color: var(--ink);
  font-size: .96rem;
  line-height: 1.85;
}

.page-faq .faq-answer p {
  margin: 0 0 .78em;
}

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

.page-faq .faq-answer a {
  color: var(--ice);
  text-underline-offset: 3px;
  font-weight: 700;
}

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

.page-faq .faq-list--spaced {
  margin-top: clamp(4px, 1vw, 10px);
}

.page-faq .faq-callout {
  margin-top: 12px;
  padding: 13px 16px;
  background: var(--deep);
  border-left: 4px solid var(--aurora);
  color: rgba(245, 247, 242, .9);
  font-size: .9rem;
  line-height: 1.75;
}

/* ---------- 结尾 ---------- */
.page-faq .faq-cta {
  background: var(--deep);
  color: var(--paper);
  padding: clamp(34px, 6vw, 66px) 0;
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-cta .eyebrow {
  color: var(--aurora);
}

.page-faq .faq-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.35rem);
  line-height: 1.14;
  color: var(--paper);
  margin: .2em 0 .5em;
  max-width: 22ch;
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 58ch;
  color: rgba(245, 247, 242, .78);
  font-size: .97rem;
  line-height: 1.85;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-top {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--frost);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-top:hover {
  color: var(--aurora);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-block {
    grid-template-columns: minmax(200px, 272px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-block__aside {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .8fr);
    align-items: center;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-toc {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary::after,
  .page-faq .faq-toc a,
  .page-faq .faq-tabs .tab {
    transition: none;
  }
}
</PAGE_CSS>