.page-faq {
  --faq-index-w: 232px;
  --faq-row-gap: 4px;
  --faq-glow: rgba(34, 224, 214, .38);
  padding-bottom: 72px;
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: 18px;
  padding: 26px 0 44px;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 18ch;
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  position: relative;
  margin-top: 6px;
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ion-cyan), var(--nebula-purple) 42%, transparent 88%);
  opacity: .7;
}

/* 布局：移动端单列，桌面端侧栏索引 + 主栏问答 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-faq .faq-body {
  min-width: 0;
  display: grid;
  gap: 6px;
}

/* 问题索引 */
.page-faq .faq-index {
  min-width: 0;
  padding: 18px 18px 20px;
  background: linear-gradient(160deg, rgba(11, 18, 38, .92), rgba(5, 7, 14, .6));
  border: 1px solid var(--line-soft);
  clip-path: var(--cut-sm);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  color: var(--purple-text);
}

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

.page-faq .faq-index__list a {
  position: relative;
  display: block;
  padding: 9px 8px 9px 20px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--gx-ease), background-color .2s var(--gx-ease);
}

.page-faq .faq-index__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 10px;
  height: 1px;
  background: var(--grid-line);
  transition: background-color .2s var(--gx-ease), width .2s var(--gx-ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--starlight);
  background: rgba(34, 224, 214, .07);
}

.page-faq .faq-index__list a:hover::before,
.page-faq .faq-index__list a:focus-visible::before {
  width: 14px;
  background: var(--ion-cyan);
}

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
}

.page-faq .faq-index__hint a {
  color: var(--ion-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
}

.page-faq .faq-index__hint a:hover,
.page-faq .faq-index__hint a:focus-visible {
  color: var(--starlight);
}

/* 问答分组 */
.page-faq .faq-group {
  padding-top: 34px;
  padding-bottom: 12px;
}

.page-faq .faq-qa {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(20, 28, 51, .28), transparent 72%);
  transition: border-color .2s var(--gx-ease), background-color .2s var(--gx-ease);
}

.page-faq .faq-qa:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-qa:hover {
  background: rgba(20, 28, 51, .5);
}

.page-faq .faq-qa[open] {
  border-top-color: var(--ion-cyan);
  background: linear-gradient(180deg, rgba(34, 224, 214, .07), transparent 70%);
}

.page-faq .faq-qa__summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 10px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--starlight);
}

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

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

.page-faq .faq-qa__num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ion-cyan);
  opacity: .8;
}

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

.page-faq .faq-qa__icon {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.page-faq .faq-qa__icon::before,
.page-faq .faq-qa__icon::after {
  content: "";
  position: absolute;
  background: var(--ion-cyan);
  transition: transform .2s var(--gx-ease), opacity .2s var(--gx-ease);
}

.page-faq .faq-qa__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-qa__icon::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

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

.page-faq .faq-qa__body {
  padding: 0 22px 22px 48px;
  animation: faq-fade .24s ease-out;
}

.page-faq .faq-qa__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-qa__body a {
  color: var(--ion-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
}

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

@keyframes faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 节奏缓冲条 */
.page-faq .faq-band {
  margin: 26px 0;
  padding: 18px 20px;
  border-left: 2px solid var(--nebula-purple);
  background: linear-gradient(100deg, rgba(122, 77, 255, .14), rgba(122, 77, 255, .02) 70%);
  clip-path: var(--cut-xs);
}

.page-faq .faq-band__text {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--starlight);
}

/* 三栏读法信息图形 */
.page-faq .faq-flow {
  position: relative;
  list-style: none;
  margin: 4px 0 26px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  padding: 14px 16px 14px 18px;
  background: linear-gradient(120deg, rgba(20, 28, 51, .82), rgba(20, 28, 51, .34));
  border: 1px solid var(--line-soft);
  clip-path: var(--cut-xs);
}

.page-faq .faq-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--ion-cyan), var(--nebula-purple));
}

.page-faq .faq-flow__idx {
  grid-row: 1 / span 2;
  align-self: center;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ion-cyan);
}

.page-faq .faq-flow__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--starlight);
}

.page-faq .faq-flow__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-reading__figure {
  margin: 0 0 18px;
  border: 1px solid var(--line-soft);
}

.page-faq .faq-reading__figure .gx-media__caption {
  font-size: 13px;
}

/* 数据概览 */
.page-faq .faq-stats {
  display: grid;
  gap: 12px;
  margin: 4px 0 22px;
}

.page-faq .faq-stat {
  padding: 16px 18px;
  background: linear-gradient(150deg, rgba(11, 18, 38, .92), rgba(5, 7, 14, .5));
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--nebula-purple);
  clip-path: var(--cut-xs);
}

.page-faq .faq-stat__num {
  margin: 0 0 6px;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--ion-cyan);
}

.page-faq .faq-stat__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* 行动按钮组 */
.page-faq .faq-actions {
  margin-top: 26px;
}

/* 平板及以上 */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding-top: 34px;
    padding-bottom: 54px;
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .faq-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-qa__summary {
    grid-template-columns: 42px minmax(0, 1fr) 18px;
    font-size: 17px;
    padding: 18px 6px;
  }

  .page-faq .faq-qa__body {
    padding: 0 32px 24px 58px;
  }
}

/* 桌面端：侧栏索引固定 */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--gx-header-h) + 24px);
  }

  .page-faq .faq-hero__title {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-qa__body {
    animation: none;
  }

  .page-faq .faq-qa__icon::before,
  .page-faq .faq-qa__icon::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-qa {
    transition: none;
  }
}