.page-faq {
  --faq-nav-w: 216px;
  --faq-sticky-top: 104px;
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line-ink);
  background:
    radial-gradient(circle at 84% 14%, rgba(47, 224, 208, 0.13), transparent 54%),
    radial-gradient(circle at 6% 92%, rgba(255, 90, 46, 0.09), transparent 48%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-crumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-crumb__item a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-crumb__item a:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--line-cy);
}

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

.page-faq .faq-crumb__sep {
  color: var(--ink-500);
}

.page-faq .faq-crumb__item--now {
  color: var(--sand);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-faq .faq-hero__lede h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.2vw, 58px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--mist);
}

.page-faq .faq-hero__sub {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--fog);
}

.page-faq .faq-hero__facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
}

.page-faq .faq-hero__fact {
  background: rgba(10, 34, 51, 0.92);
  padding: 14px 16px 16px;
}

.page-faq .faq-hero__fact-k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.page-faq .faq-hero__fact-v {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .faq-hero__fact-v .num {
  font-size: 30px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__fact-n {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding-top: clamp(36px, 5vw, 64px);
  padding-bottom: clamp(44px, 6vw, 80px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-aside {
  border-top: 1px solid var(--line-ink);
  padding-top: 14px;
}

.page-faq .faq-aside__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-faq .faq-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: none;
  padding: 9px 13px;
  border: 1px solid var(--line-ink);
  color: var(--fog);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-nav__link:hover {
  color: var(--cyan-soft);
  border-color: var(--line-cy);
  background: rgba(47, 224, 208, 0.05);
}

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

.page-faq .faq-nav__idx {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-aside__note {
  display: none;
  margin: 16px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line-faint);
  font-size: 13px;
  line-height: 1.75;
  color: var(--fog);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 108px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(42px, 6vw, 76px);
}

.page-faq .faq-group__head {
  border-top: 2px solid rgba(232, 214, 184, 0.5);
  padding-top: 16px;
  margin-bottom: 20px;
}

.page-faq .faq-group__num {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.page-faq .faq-group__head h2 {
  margin: 8px 0 0;
  font-size: clamp(23px, 3.6vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--mist);
  letter-spacing: -0.005em;
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

/* ---------- 配图 ---------- */
.page-faq .faq-shot {
  margin: 0 0 24px;
  border: 1px solid var(--line-ink);
  background: var(--ink-800);
}

.page-faq .faq-shot--support {
  margin: 26px 0 0;
}

.page-faq .faq-shot__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--ink-700);
}

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

.page-faq .faq-shot figcaption {
  border-top: 1px solid var(--line-ink);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--fog);
}

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

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

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 12px 18px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s ease;
}

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

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

.page-faq .qa__summary:hover {
  background: rgba(47, 224, 208, 0.05);
}

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

.page-faq .qa__idx {
  flex: none;
  width: 34px;
  padding-top: 3px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--sand);
  transition: color 0.2s ease;
}

.page-faq .qa[open] .qa__idx {
  color: var(--cyan);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .qa__toggle {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .qa__toggle::before,
.page-faq .qa__toggle::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-faq .qa__toggle::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa__toggle::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 16px 22px 0;
  color: var(--fog);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 38em;
}

.page-faq .qa__steps {
  counter-reset: faqstep;
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  max-width: 38em;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  color: var(--mist);
  font-size: 15px;
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 底部去向 ---------- */
.page-faq .faq-next {
  padding-top: clamp(40px, 5vw, 64px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

.page-faq .faq-next__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-next__lead h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.8vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--mist);
}

.page-faq .faq-next__note {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

.page-faq .faq-next__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
}

.page-faq .faq-next__item {
  background: var(--ink-700);
}

.page-faq .faq-next__link {
  display: grid;
  gap: 6px;
  padding: 18px 18px 20px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-next__link:hover {
  background: rgba(47, 224, 208, 0.06);
  border-left-color: var(--cyan);
}

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

.page-faq .faq-next__idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-faq .faq-next__title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-next__link:hover .faq-next__title {
  color: var(--cyan-soft);
}

.page-faq .faq-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-next__extra {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fog);
}

.page-faq .faq-next__extra a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cy);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-next__extra a:hover {
  color: var(--mist);
  border-bottom-color: var(--cyan);
}

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

.page-faq .faq-next__extra span {
  margin: 0 8px;
  color: var(--ink-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__summary {
    gap: 16px;
    padding: 20px 16px 20px 0;
  }

  .page-faq .qa__idx {
    width: 46px;
    padding-top: 4px;
  }

  .page-faq .qa__body {
    padding: 0 48px 24px 62px;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-nav {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line-ink);
  }

  .page-faq .faq-nav__link {
    border-color: transparent;
    padding: 9px 12px;
    white-space: normal;
    margin-left: -1px;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-nav__link:hover {
    border-color: transparent;
    border-left-color: var(--cyan);
  }

  .page-faq .faq-aside__note {
    display: block;
  }

  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-nav-w: 240px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__summary,
  .page-faq .qa__idx,
  .page-faq .qa__toggle::before,
  .page-faq .qa__toggle::after,
  .page-faq .faq-nav__link,
  .page-faq .faq-next__link,
  .page-faq .faq-crumb__item a {
    transition: none;
  }
}
<<<END>>>