.page-faq {
  --faq-hero-top: clamp(104px, 13vw, 176px);
  --faq-radius: 0px;
  background: var(--c-ink);
  color: var(--c-mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: var(--faq-hero-top) 0 clamp(42px, 6vw, 86px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(115% 85% at 88% -10%, rgba(54, 242, 192, .15), transparent 62%),
    radial-gradient(85% 70% at 2% 8%, rgba(244, 184, 74, .08), transparent 58%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-ink-2) 76%, var(--c-ink) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 92px 100%;
  opacity: .45;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 72%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 60px);
  align-items: end;
}

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

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 22px;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 17ch;
  font-size: clamp(32px, 7vw, 74px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 42ch;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.9;
  color: var(--c-slate);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-mid);
  background: var(--c-glass);
  overflow: hidden;
}

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

.page-faq .faq-hero__caption {
  display: block;
  padding: 10px 12px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-slate);
  border-top: 1px solid var(--line-soft);
  background: rgba(7, 26, 21, .55);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding: clamp(44px, 6.5vw, 92px) 0 clamp(52px, 8vw, 104px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-main {
  min-width: 0;
  order: 1;
}

.page-faq .faq-side {
  order: 0;
  min-width: 0;
}

.page-faq .faq-side__inner {
  border: 1px solid var(--line-soft);
  border-radius: var(--faq-radius);
  padding: 18px 16px 20px;
  background: rgba(22, 59, 50, .55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-faq .faq-side__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-amber);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

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

.page-faq .faq-toc a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 2px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-slate);
  text-decoration: none;
  transition: color 160ms ease;
}

.page-faq .faq-toc a > .mono {
  flex: 0 0 auto;
  font-size: 11px;
  color: var(--c-amber);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--c-teal);
}

.page-faq .faq-side__round {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 12px;
  border: 1px solid rgba(54, 242, 192, .45);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-teal);
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-faq .faq-side__round:hover,
.page-faq .faq-side__round:focus-visible {
  background: var(--teal-soft);
  border-color: var(--c-teal);
}

.page-faq .faq-side__meta {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-slate);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 104px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-group__index {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-amber);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 31px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-faq .faq-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 10px;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-faq .qa[open] {
  border-left-color: var(--c-teal);
  background: linear-gradient(90deg, rgba(54, 242, 192, .07), transparent 62%);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 6px 17px 14px;
  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: 1px solid var(--c-teal);
  outline-offset: 2px;
}

.page-faq .qa__label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(14.5px, 1.9vw, 16.5px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--c-mist);
  transition: color 160ms ease;
}

.page-faq .qa summary:hover .qa__label {
  color: var(--c-teal);
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border: 1px solid var(--line-mid);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--c-teal);
}

.page-faq .qa__sign::before {
  width: 9px;
  height: 1px;
}

.page-faq .qa__sign::after {
  width: 1px;
  height: 9px;
  transition: opacity 160ms ease, transform 160ms ease;
}

.page-faq .qa[open] .qa__sign {
  border-color: var(--c-teal);
  background: var(--teal-soft);
}

.page-faq .qa[open] .qa__sign::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 0 8px 22px 28px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.95;
  color: var(--c-slate);
}

.page-faq .qa__body p {
  margin: 0 0 10px;
}

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

.page-faq .qa__body .faq-mail {
  color: var(--c-amber);
  font-size: 13.5px;
  word-break: break-all;
}

/* ---------- 内嵌图 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
  border: 1px solid var(--line-soft);
  background: var(--c-ink-2);
  overflow: hidden;
}

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

.page-faq .faq-figure__caption {
  display: block;
  padding: 10px 12px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-slate);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 尾段 ---------- */
.page-faq .faq-tail {
  padding: clamp(40px, 6vw, 78px) 0 clamp(52px, 8vw, 96px);
  border-top: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, var(--c-ink-2) 0%, var(--c-ink) 100%);
}

.page-faq .faq-tail__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  max-width: 100%;
}

.page-faq .faq-tail__inner h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-faq .faq-tail__inner p {
  margin: 0;
  max-width: 44ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-slate);
}

.page-faq .faq-tail__inner .faq-actions {
  margin-top: 4px;
}

.page-faq .faq-tail__legal {
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-faq .faq-tail__legal a {
  color: var(--c-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 242, 192, .35);
}

.page-faq .faq-tail__legal a:hover {
  border-bottom-color: var(--c-teal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }

  .page-faq .faq-toc li + li {
    border-top: 0;
  }

  .page-faq .faq-toc li {
    border-top: 1px solid var(--line-soft);
  }

  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-tail__inner > div:first-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-tail__legal {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-faq .faq-hero h1 {
    max-width: 15ch;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .page-faq .faq-main {
    order: 0;
  }

  .page-faq .faq-side {
    order: 1;
  }

  .page-faq .faq-side__inner {
    position: sticky;
    top: 96px;
  }

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

  .page-faq .faq-toc li {
    border-top: 1px solid var(--line-soft);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__label,
  .page-faq .qa__sign,
  .page-faq .faq-toc a,
  .page-faq .faq-side__round {
    transition: none;
  }
}
<<<END>>>