.page-faq {
  --faq-hair: rgba(61, 90, 254, .26);
  --faq-hair-soft: rgba(61, 90, 254, .18);
  --faq-side-w: 236px;
  --faq-sticky-top: calc(var(--header-h) + 24px);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 0;
  border-bottom: 1px solid var(--faq-hair);
  background:
    radial-gradient(120% 88% at 10% 0%, rgba(108, 59, 255, .22), transparent 58%),
    radial-gradient(88% 70% at 94% 8%, rgba(34, 224, 214, .13), transparent 62%);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 26px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-hero__side {
  margin: 0;
  color: var(--muted);
  opacity: .85;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 15ch;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--faq-hair);
}

.page-faq .faq-hero__facts-num {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 21px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-hero__facts-label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-visual {
  margin: 40px 0 0;
}

.page-faq .faq-visual--flow {
  margin: 24px 0 4px;
}

.page-faq .faq-visual .media-frame__caption {
  color: var(--muted);
}

/* ============ 主体骨架 ============ */
.page-faq .faq-body {
  padding: 60px 0 88px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

/* ============ 左侧分类索引 ============ */
.page-faq .faq-index__inner {
  padding: 20px 18px 22px;
  border-radius: var(--radius);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--glass);
  border-left-color: var(--cyan);
  background-color: rgba(34, 224, 214, .08);
}

.page-faq .faq-index__num {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-faq .faq-index__text {
  font-size: 14.5px;
  line-height: 1.5;
}

/* ============ 问答分组 ============ */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 64px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-hard);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 28px;
  line-height: 1;
  color: var(--violet);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.35rem, 1.05rem + 1.2vw, 1.75rem);
  line-height: 1.25;
}

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

/* ============ 单条问答 ============ */
.page-faq .qa {
  border-bottom: 1px solid var(--faq-hair-soft);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-left: -3px;
  padding: 18px 0 18px 16px;
  border-left: 3px solid transparent;
  list-style: none;
  cursor: pointer;
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

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

.page-faq .qa__q:hover {
  border-left-color: var(--cyan-soft);
  background-color: rgba(34, 224, 214, .05);
}

.page-faq .qa[open] > .qa__q {
  border-left-color: var(--violet);
}

.page-faq .qa__text {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--glass);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__q:hover .qa__text {
  color: var(--cyan);
}

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

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

.page-faq .qa__sign::before {
  left: 4px;
  right: 4px;
  top: 9px;
  height: 1px;
}

.page-faq .qa__sign::after {
  top: 4px;
  bottom: 4px;
  left: 9px;
  width: 1px;
}

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

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

.page-faq .qa__a {
  padding: 0 0 24px 34px;
  max-width: 68ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  animation: faq-reveal var(--dur) var(--ease);
}

.page-faq .qa__a p {
  margin: 0 0 12px;
}

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

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-soft);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

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

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 中屏：首屏事实条展开 ============ */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 56px;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--faq-hair);
    border-bottom: 1px solid var(--faq-hair);
  }

  .page-faq .faq-hero__facts li {
    padding: 18px 20px;
    border-left: 1px solid var(--faq-hair);
  }

  .page-faq .faq-hero__facts li:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-faq .faq-body {
    padding: 76px 0 104px;
  }

  .page-faq .qa__q {
    padding: 20px 0 20px 18px;
  }

  .page-faq .qa__a {
    padding-left: 36px;
    padding-bottom: 26px;
  }
}

/* ============ 桌面：左右分栏 + 吸顶索引 ============ */
@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-hero__side {
    writing-mode: vertical-rl;
    letter-spacing: .3em;
    padding-top: 8px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-faq .faq-index__link {
    padding: 10px 10px;
  }

  .page-faq .faq-index__text {
    font-size: 15px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-group + .faq-group {
    margin-top: 84px;
  }
}

/* ============ 无障碍与窄屏收尾 ============ */
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (max-width: 480px) {
  .page-faq .faq-hero__title {
    max-width: none;
  }

  .page-faq .qa__q {
    gap: 11px;
    padding-left: 12px;
  }

  .page-faq .qa__a {
    padding-left: 31px;
    font-size: 15.5px;
  }
}
<<<END>>>