.page-faq {
  --faq-grid-line: rgba(30, 74, 122, .5);
  --faq-cyan-soft: rgba(0, 229, 255, .38);
  background: var(--tx-night);
  color: var(--tx-ice);
  font-family: var(--tx-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.8rem, 6vw, 4.4rem) 0 clamp(2.2rem, 6vw, 4rem);
  background:
    radial-gradient(140% 95% at 88% -15%, rgba(0, 229, 255, .18), transparent 58%),
    radial-gradient(110% 80% at -5% 115%, rgba(255, 107, 26, .13), transparent 62%),
    linear-gradient(155deg, var(--tx-blue) 0%, var(--tx-night) 72%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--tx-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--tx-line) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: .16;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero__wedge {
  position: absolute;
  right: -12%;
  bottom: -14%;
  width: min(70vw, 660px);
  aspect-ratio: 3 / 2;
  z-index: -1;
  background: linear-gradient(140deg, rgba(0, 229, 255, .24), rgba(255, 107, 26, .14));
  clip-path: polygon(26% 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-faq .faq-hero__eyebrow {
  margin: 1.4rem 0 0;
}

.page-faq .faq-hero__title {
  margin: .75rem 0 0;
  max-width: 20ch;
  font-family: var(--tx-body);
  font-weight: 800;
  font-size: clamp(1.9rem, 7.6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--tx-ice);
}

.page-faq .faq-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 64ch;
  color: var(--tx-steel);
  font-size: clamp(.96rem, 2.6vw, 1.08rem);
  line-height: 1.9;
}

.page-faq .faq-jump {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .55rem .6rem;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .52rem .95rem;
  border: 1px solid var(--tx-line);
  border-radius: 999px;
  color: var(--tx-steel);
  font-size: .86rem;
  letter-spacing: .02em;
  text-decoration: none;
  transition: color .2s var(--tx-ease), background-color .2s var(--tx-ease), border-color .2s var(--tx-ease);
}

.page-faq .faq-jump a::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--tx-cyan);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--tx-night);
  background: var(--tx-cyan);
  border-color: var(--tx-cyan);
  outline: none;
}

.page-faq .faq-jump a:hover::before,
.page-faq .faq-jump a:focus-visible::before {
  background: var(--tx-night);
}

/* ---------- 章节外壳 ---------- */
.page-faq .faq-sec {
  position: relative;
  padding: clamp(2.4rem, 7vw, 4.8rem) 0;
  border-top: 1px solid rgba(30, 74, 122, .45);
}

.page-faq .faq-sec--teal {
  background: linear-gradient(180deg, rgba(14, 59, 58, .58), rgba(6, 21, 46, 0) 88%);
}

.page-faq .faq-sec--blue {
  background: linear-gradient(180deg, rgba(10, 42, 92, .62), rgba(6, 21, 46, 0) 88%);
}

.page-faq .faq-sec--violet {
  background: linear-gradient(180deg, rgba(36, 20, 71, .62), rgba(6, 21, 46, 0) 88%);
}

.page-faq .faq-sec--wine {
  background: linear-gradient(180deg, rgba(74, 18, 48, .58), rgba(6, 21, 46, 0) 88%);
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(.85rem, 3vw, 1.6rem);
  margin-bottom: clamp(1.3rem, 4vw, 2.1rem);
}

.page-faq .faq-sec__num {
  flex: none;
  font-family: var(--tx-mono);
  font-size: clamp(1.7rem, 6vw, 3.1rem);
  font-weight: 700;
  line-height: .95;
  letter-spacing: .02em;
  color: var(--faq-cyan-soft);
}

.page-faq .faq-sec__title {
  margin: .32rem 0 0;
  font-size: clamp(1.3rem, 4.8vw, 2.25rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--tx-ice);
}

.page-faq .faq-sec__body {
  display: grid;
  gap: clamp(1.3rem, 4vw, 2.2rem);
}

.page-faq .faq-sec__media {
  border-radius: 2px;
}

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

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

.page-faq .faq-sec__list--narrow {
  max-width: 78ch;
  margin-top: clamp(1.2rem, 4vw, 1.8rem);
}

/* ---------- 数字条 ---------- */
.page-faq .faq-facts {
  list-style: none;
  margin: 0 0 clamp(1.4rem, 4vw, 2rem);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--faq-grid-line);
  background: var(--faq-grid-line);
}

.page-faq .faq-facts li {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem .9rem;
  background: var(--tx-night);
}

.page-faq .faq-facts__n {
  font-size: clamp(1.35rem, 5vw, 1.9rem);
  color: var(--tx-cyan);
  line-height: 1.1;
}

.page-faq .faq-facts__l {
  font-size: .8rem;
  letter-spacing: .05em;
  color: var(--tx-steel);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--tx-grid, rgba(30, 74, 122, .55));
  border-top-color: rgba(30, 74, 122, .55);
  background: linear-gradient(180deg, rgba(10, 42, 92, .28), rgba(6, 21, 46, 0));
  transition: background-color .25s var(--tx-ease), box-shadow .25s var(--tx-ease);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid rgba(30, 74, 122, .55);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.05rem .85rem 1.05rem 1rem;
  cursor: pointer;
  list-style: none;
  color: var(--tx-ice);
  font-size: clamp(1rem, 2.4vw, 1.08rem);
  font-weight: 600;
  line-height: 1.55;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--tx-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--tx-cyan);
  transform: translateY(1px);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--tx-orange);
}

.page-faq .faq-item__q:hover {
  color: var(--tx-cyan);
}

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

.page-faq .faq-item[open] {
  background: linear-gradient(180deg, rgba(14, 59, 58, .5), rgba(6, 21, 46, 0));
  box-shadow: inset 3px 0 0 var(--tx-cyan);
}

.page-faq .faq-item__a {
  padding: 0 1rem 1.25rem 1rem;
  color: var(--tx-steel);
  font-size: .96rem;
  line-height: 1.9;
}

.page-faq .faq-item__a p {
  margin: 0 0 .7rem;
  max-width: 70ch;
}

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

.page-faq .faq-item__a a {
  color: var(--tx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .38);
  transition: color .2s var(--tx-ease), border-color .2s var(--tx-ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--tx-orange);
  border-color: var(--tx-orange);
  outline: none;
}

/* ---------- 结尾 ---------- */
.page-faq .faq-cta {
  position: relative;
  border-top: 1px solid rgba(30, 74, 122, .5);
  padding: clamp(2.4rem, 7vw, 4.6rem) 0;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 107, 26, .16), transparent 60%),
    linear-gradient(120deg, var(--tx-violet), var(--tx-night) 72%);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--tx-ice);
}

.page-faq .faq-cta__lead {
  margin: 1rem 0 0;
  max-width: 60ch;
  color: var(--tx-steel);
  font-size: clamp(.95rem, 2.5vw, 1.05rem);
  line-height: 1.85;
}

.page-faq .faq-cta__actions {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-faq .faq-sec__body {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 3.6rem);
  }

  .page-faq .faq-sec__media {
    position: sticky;
    top: 7rem;
  }

  .page-faq .faq-hero__inner {
    padding-right: 6%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-item,
  .page-faq .faq-item__a a {
    transition: none;
  }
}
</final CSS>
</final answer>

.page-faq {
  --tx-grid: currentColor;
}