.page-faq {
  --faq-line: rgba(46, 230, 200, .16);
  --faq-rule: rgba(138, 151, 168, .22);
  --faq-panel: #0B1220;
  --faq-panel-deep: #070D18;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: 20px 46px;
  border-bottom: 2px solid var(--steel);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(46, 230, 200, .10), transparent 58%),
    linear-gradient(180deg, var(--ink) 0%, var(--navy) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 120px;
  background-image:
    linear-gradient(90deg, rgba(46, 230, 200, .10) 1px, transparent 1px),
    linear-gradient(0deg, rgba(46, 230, 200, .07) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, transparent, #000);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-faq .faq-hero__lead {
  max-width: 640px;
}

.page-faq .faq-hero__lead h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--snow);
}

.page-faq .faq-hero__text {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 560px;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__facts {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  background: var(--faq-panel-deep);
}

.page-faq .faq-hero__facts li {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: baseline;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-hero__facts li:last-child {
  border-bottom: 0;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .faq-hero__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
  grid-column: 1 / -1;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-section {
  padding-block: 40px 72px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 32px;
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--faq-panel);
  color: var(--snow);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--cyan);
  background: rgba(46, 230, 200, .08);
}

/* ---------- 右侧问答 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 100px;
  padding-bottom: 34px;
  margin-bottom: 34px;
  border-bottom: 1px dashed var(--faq-rule);
}

.page-faq .faq-group--last {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: 16px;
  border-left: 3px solid var(--cyan);
  margin-bottom: 20px;
}

.page-faq .faq-group__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 6px 0 0;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--snow);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--faq-panel);
  overflow: hidden;
}

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

.page-faq .faq-item:last-child {
  border-bottom: 0;
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 18px 46px 18px 42px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--snow);
  transition: background-color .2s ease, color .2s ease;
}

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

.page-faq .faq-item > summary::before {
  content: "+";
  position: absolute;
  left: 15px;
  top: 17px;
  width: 18px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.35;
  color: var(--cyan);
  transition: transform .2s ease;
}

.page-faq .faq-item[open] > summary::before {
  content: "–";
  color: var(--flame);
}

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--steel);
  transition: background-color .2s ease, box-shadow .2s ease;
}

.page-faq .faq-item[open] > summary::after {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(46, 230, 200, .16);
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  background: rgba(46, 230, 200, .06);
}

.page-faq .faq-answer {
  padding: 0 22px 20px 42px;
  border-left: 2px solid var(--faq-line);
  margin-left: 15px;
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: #C7D2E0;
}

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

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 200, .45);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-answer .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold);
  letter-spacing: .02em;
}

.page-faq .faq-copy {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

.page-faq .faq-figure--side {
  margin: 22px 0 0;
}

/* ---------- 收尾清单 ---------- */
.page-faq .faq-checklist {
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  background: linear-gradient(180deg, var(--faq-panel), var(--faq-panel-deep));
  padding: 24px 20px;
}

.page-faq .faq-checklist__list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-checklist__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-checklist__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--gold);
}

.page-faq .faq-checklist__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

.page-faq .faq-checklist__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-checklist__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-checklist__tip {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--faq-rule);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding-block: 28px 58px;
  }

  .page-faq .faq-hero__facts li {
    grid-template-columns: auto auto 1fr;
    align-items: center;
    gap: 14px;
  }

  .page-faq .faq-hero__desc {
    grid-column: auto;
  }

  .page-faq .faq-answer {
    padding: 0 30px 24px 44px;
  }

  .page-faq .faq-checklist {
    padding: 32px 28px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, .85fr);
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-hero__facts {
    box-shadow: var(--shadow-hard);
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    padding-right: 12px;
    border-right: 1px solid var(--steel);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    width: 100%;
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-color: var(--cyan);
    background: rgba(46, 230, 200, .07);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::before,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>