.page-faq {
  --faq-gap: clamp(56px, 8vw, 112px);
  --faq-sub-paper: #4E6486;
  --faq-pad: clamp(16px, 2.2vw, 22px);
  background: var(--ink-950);
  color: var(--mist-100);
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
  padding-left: 0;
  padding-right: 0;
}

/* ---------- 首屏 ---------- */

.page-faq .support-hero {
  padding: clamp(28px, 4.5vw, 52px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .support-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .support-hero__text {
  position: relative;
  padding: clamp(24px, 3.4vw, 42px) clamp(20px, 3vw, 38px);
  background: var(--ink-900);
  border: var(--rule);
  box-shadow: var(--shadow-hard);
}

.page-faq .support-hero__text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 96px;
  height: 6px;
  background: var(--neon-400);
}

.page-faq .support-hero__kicker {
  margin: 0 0 18px;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--clay-600);
}

.page-faq .support-hero__title {
  margin: 0 0 18px;
  font-size: clamp(1.85rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--paper-050);
}

.page-faq .support-hero__lede {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--mist-100);
}

.page-faq .support-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 2px solid var(--ink-700);
}

.page-faq .support-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--fs-14);
  color: var(--slate-400);
}

.page-faq .support-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-22);
  font-weight: 700;
  color: var(--neon-400);
}

.page-faq .support-hero__media {
  margin: 0;
}

.page-faq .support-hero__media .media__frame {
  border: var(--rule);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-faq .support-hero__media .media__cap {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 3px solid var(--clay-600);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 分类索引条 ---------- */

.page-faq .faq-index {
  background: var(--ink-900);
  border-top: var(--rule);
  border-bottom: var(--rule);
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__item {
  flex: 1 1 auto;
}

.page-faq .faq-index__item + .faq-index__item .faq-index__link {
  border-left: 2px solid var(--ink-700);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px clamp(14px, 2.2vw, 26px);
  font-size: var(--fs-14);
  color: var(--mist-100);
  text-decoration: none;
  transition: background var(--speed) ease, color var(--speed) ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--neon-400);
  color: var(--ink-950);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--clay-600);
}

.page-faq .faq-index__link:hover .faq-index__no,
.page-faq .faq-index__link:focus-visible .faq-index__no {
  color: var(--ink-950);
}

/* ---------- 问答区块骨架 ---------- */

.page-faq .faq-block {
  padding: var(--faq-gap) 0;
}

.page-faq .faq-block--paper {
  background: var(--paper-050);
  color: var(--paper-ink);
}

.page-faq .faq-block__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 48px);
}

.page-faq .faq-block__rail {
  align-self: start;
}

.page-faq .faq-block__no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(2.25rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--ink-700);
}

.page-faq .faq-block--paper .faq-block__no {
  color: var(--paper-line);
}

.page-faq .faq-block__title {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-faq .faq-block--paper .faq-block__title {
  color: var(--paper-head);
}

.page-faq .faq-block__note {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--clay-600);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .faq-block--paper .faq-block__note {
  color: var(--faq-sub-paper);
}

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

/* ---------- 折叠问答 ---------- */

.page-faq .fold-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
}

.page-faq .fold {
  background: var(--ink-800);
  border: 2px solid var(--ink-700);
  border-bottom: 0;
}

.page-faq .fold:last-child {
  border-bottom: 2px solid var(--ink-700);
}

.page-faq .fold > .fold__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper-050);
  transition: background var(--speed) ease;
}

.page-faq .fold > .fold__summary::-webkit-details-marker {
  display: none;
}

.page-faq .fold > .fold__summary:hover {
  background: var(--ink-700);
}

.page-faq .fold > .fold__summary:focus-visible {
  outline: 2px solid var(--neon-400);
  outline-offset: -2px;
}

.page-faq .fold__no {
  flex: 0 0 auto;
  min-width: 44px;
  padding: 3px 6px;
  border: 1px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-align: center;
  color: var(--slate-400);
}

.page-faq .fold__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .fold__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .fold__icon::before,
.page-faq .fold__icon::after {
  content: "";
  position: absolute;
  background: var(--neon-400);
}

.page-faq .fold__icon::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .fold__icon::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
  transition: opacity var(--speed) ease, transform var(--speed) ease;
}

.page-faq .fold[open] .fold__icon::after {
  opacity: 0;
  transform: scaleY(0.25);
}

.page-faq .fold__body {
  padding: 18px var(--faq-pad) 22px;
  border-top: 1px dashed var(--ink-700);
  background: var(--ink-900);
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--mist-100);
}

.page-faq .fold__body p {
  margin: 0;
  max-width: 66ch;
}

.page-faq .fold__body a {
  color: var(--neon-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 浅色分区里的折叠面板 */

.page-faq .faq-block--paper .fold {
  background: #FFFFFF;
  border-color: var(--paper-line);
}

.page-faq .faq-block--paper .fold:last-child {
  border-bottom-color: var(--paper-line);
}

.page-faq .faq-block--paper .fold > .fold__summary {
  color: var(--paper-head);
}

.page-faq .faq-block--paper .fold > .fold__summary:hover {
  background: var(--paper-050);
}

.page-faq .faq-block--paper .fold__no {
  border-color: var(--paper-line);
  color: var(--faq-sub-paper);
}

.page-faq .faq-block--paper .fold__body {
  background: var(--paper-050);
  border-top-color: var(--paper-line);
  color: var(--paper-ink);
}

.page-faq .faq-block--paper .fold__body a {
  color: var(--clay-600);
}

.page-faq .faq-block--paper .btn--ghost {
  color: var(--paper-head);
}

.page-faq .faq-block--paper .fold__icon::before,
.page-faq .faq-block--paper .fold__icon::after {
  background: var(--clay-600);
}

/* ---------- 适配清单 ---------- */

.page-faq .faq-device__head {
  margin-bottom: clamp(24px, 3.5vw, 44px);
  max-width: 68ch;
}

.page-faq .faq-device__title {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper-head);
}

.page-faq .faq-device__lead {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--faq-sub-paper);
  max-width: 60ch;
}

.page-faq .faq-device__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}

.page-faq .faq-legend {
  margin: 0;
}

.page-faq .faq-legend .media__frame {
  border: 2px solid var(--paper-line);
  background: #FFFFFF;
}

.page-faq .faq-legend .media__cap {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--amber-300);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--faq-sub-paper);
}

/* ---------- 联系与反馈 ---------- */

.page-faq .faq-block--reach {
  background: var(--ink-900);
  border-top: var(--rule);
}

.page-faq .faq-reach {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-faq .faq-reach__title {
  margin: 12px 0 16px;
  font-size: clamp(1.4rem, 3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.012em;
  color: var(--paper-050);
}

.page-faq .faq-reach__lead {
  margin: 0 0 26px;
  max-width: 58ch;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--mist-100);
}

.page-faq .faq-reach__lead a {
  color: var(--neon-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-reach__list {
  margin: 0;
  padding: 0;
  background: var(--ink-950);
  border: var(--rule);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-reach__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 2px solid var(--ink-700);
}

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

.page-faq .faq-reach__row dt {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-400);
}

.page-faq .faq-reach__row dd {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.6;
  color: var(--paper-050);
  word-break: break-word;
}

/* ---------- 桌面栅格 ---------- */

@media (min-width: 900px) {
  .page-faq .support-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .support-hero__media {
    margin-top: clamp(30px, 4vw, 58px);
  }

  .page-faq .faq-block__grid--4-8 {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-faq .faq-block__grid--8-4 {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-faq .faq-device__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-reach {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-index__item {
    flex: 0 1 auto;
  }
}

@media (min-width: 640px) {
  .page-faq .fold__body {
    padding-left: calc(var(--faq-pad) + 58px);
  }
}

/* ---------- 无障碍动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .page-faq .fold__icon::after,
  .page-faq .faq-index__link,
  .page-faq .fold > .fold__summary {
    transition: none;
  }
}
<<<END>>>