.page-faq {
  --faq-gutter: clamp(18px, 4vw, 44px);
  --faq-accent: var(--cyan);
  padding-bottom: 72px;
}

.page-faq .breadcrumb {
  padding-top: 24px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 26px;
  padding: var(--faq-gutter);
  border: 1px solid var(--line);
  background:
    linear-gradient(152deg, rgba(21, 58, 138, 0.36) 0%, rgba(7, 18, 36, 0.9) 44%, rgba(4, 9, 20, 0.98) 100%),
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 40px);
  overflow: hidden;
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 54px;
  height: 54px;
  border: 1px solid var(--cyan);
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-hero .eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(234, 243, 255, 0.78);
}

.page-faq .faq-hero__strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__strip-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero__strip-item .mono {
  font-size: 15px;
  color: var(--cyan);
}

/* ---------- 目录 + 问答双区 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  margin-top: 40px;
}

.page-faq .faq-index {
  border-top: 2px solid var(--cyan);
  padding-top: 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.5;
  color: rgba(234, 243, 255, 0.82);
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

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

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(34, 230, 255, 0.07);
}

.page-faq .faq-index__note {
  margin-top: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(13, 27, 51, 0.72);
}

.page-faq .faq-index__note-title {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-index__note-text {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index__note .btn {
  display: inline-block;
  font-size: 13px;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  --accent: var(--cyan);
  margin-top: 46px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .faq-group--gold {
  --accent: var(--gold);
}

.page-faq .faq-group--ice {
  --accent: var(--cyan-soft);
}

.page-faq .faq-group--red {
  --accent: var(--red);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  flex: none;
  padding: 3px 7px;
  border: 1px solid var(--accent);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-top: 10px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid rgba(155, 246, 255, 0.12);
  background: rgba(7, 18, 36, 0.55);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .qa[open] {
  background: var(--panel);
  border-color: rgba(155, 246, 255, 0.22);
  border-left-color: var(--accent);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  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: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__idx {
  padding-top: 2px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--accent);
}

.page-faq .qa__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 5px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--accent);
  transform: translateY(-50%);
}

.page-faq .qa__sign::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform 0.28s var(--ease), opacity 0.28s var(--ease);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 16px 20px;
  max-width: 68ch;
}

.page-faq .qa[open] .qa__body {
  animation: faqPanel 0.32s var(--ease) both;
}

@keyframes faqPanel {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(234, 243, 255, 0.85);
}

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

.page-faq .qa__body a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 255, 0.4);
}

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

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 6px;
}

.page-faq .faq-figure .media-frame {
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-figure--phone {
  margin-top: 16px;
}

.page-faq .faq-figure--phone .media-frame {
  width: min(262px, 100%);
  aspect-ratio: 3 / 4;
}

.page-faq .qa__body .faq-figure figcaption {
  max-width: 262px;
}

/* ---------- 底部指引 ---------- */
.page-faq .faq-cta {
  position: relative;
  margin-top: 54px;
  padding: var(--faq-gutter);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: linear-gradient(118deg, rgba(21, 58, 138, 0.3) 0%, rgba(7, 18, 36, 0.94) 58%, rgba(4, 9, 20, 0.98) 100%);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(234, 243, 255, 0.78);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__title {
    max-width: 26ch;
  }

  .page-faq .qa__summary {
    padding: 17px 20px;
  }

  .page-faq .qa__q {
    font-size: 17px;
  }

  .page-faq .qa__body {
    padding: 0 20px 22px;
  }

  .page-faq .qa__body p {
    font-size: 16.5px;
  }
}

/* ---------- 桌面双区 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

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

  .page-faq .faq-group__head {
    padding-bottom: 14px;
  }

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

  .page-faq .faq-cta__actions .btn {
    min-width: 150px;
    text-align: center;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 64px;
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__body {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .qa__sign::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>