.page-faq {
  --faq-col: 236px;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
}

/* 面包屑 */
.page-faq .crumbs {
  padding-top: 26px;
}
.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.page-faq .crumbs li {
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-faq .crumbs li + li::before {
  content: "/";
  color: var(--line);
}
.page-faq .crumbs a {
  color: var(--silver);
  text-decoration: none;
}
.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--lime);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 58px) 0 clamp(20px, 3vw, 32px);
}
.page-faq .faq-hero__mark {
  position: absolute;
  right: clamp(-10px, 1vw, 30px);
  top: -0.24em;
  z-index: 0;
  font-size: clamp(150px, 26vw, 320px);
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px #1e3049;
  pointer-events: none;
  user-select: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--edge);
}
.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.2vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--silver);
  font-size: clamp(14px, 1.05vw, 16px);
  line-height: 1.78;
}
.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 26px;
  padding-top: 16px;
  max-width: 800px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-faq .faq-hero__meta b {
  color: var(--lime);
  font-weight: 700;
}

/* 排查路径图 */
.page-faq .faq-map {
  margin: 6px 0 0;
}

/* 快速跳转条 */
.page-faq .faq-quick {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-top: 24px;
  padding: 4px 0 18px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-quick::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-quick__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}
.page-faq .faq-quick__item .mono {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--lime);
}
.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  box-shadow: inset 0 0 0 1px rgba(184, 255, 61, 0.16);
}

/* 主体两栏 */
.page-faq .faq-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 48px) var(--edge) clamp(44px, 6vw, 76px);
}

/* 左侧分类索引 */
.page-faq .faq-index {
  align-self: start;
}
.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-faq .faq-index__list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 11px 8px 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--silver);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 180ms ease, padding-left 180ms ease;
}
.page-faq .faq-index__tag,
.page-faq .faq-index__count {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 180ms ease;
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--lime);
  padding-left: 6px;
}
.page-faq .faq-index__link:hover .faq-index__tag,
.page-faq .faq-index__link:hover .faq-index__count,
.page-faq .faq-index__link:focus-visible .faq-index__tag,
.page-faq .faq-index__link:focus-visible .faq-index__count {
  color: var(--lime);
}
.page-faq .faq-index__note {
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.75;
  color: var(--muted);
}
.page-faq .faq-index__note a {
  color: var(--silver);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-index__note a:hover,
.page-faq .faq-index__note a:focus-visible {
  color: var(--lime);
}

/* 分组 */
.page-faq .faq-group {
  margin-bottom: clamp(34px, 5vw, 58px);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}
.page-faq .faq-group:last-child {
  margin-bottom: 0;
}
.page-faq .faq-group__head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 44px;
  height: 2px;
  background: var(--lime);
  transition: width 320ms ease;
}
.page-faq .faq-group.is-current .faq-group__head::after {
  width: 118px;
}
.page-faq .faq-group__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border-radius: 2px;
  background: var(--lime);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.page-faq .faq-group--device .faq-group__no {
  background: var(--orange);
}
.page-faq .faq-group--device .faq-group__head::after {
  background: var(--orange);
}
.page-faq .faq-group--export .faq-group__no {
  background: var(--silver);
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.page-faq .faq-group__head .tag {
  margin-left: auto;
}
.page-faq .faq-group__intro {
  margin: 14px 0 6px;
  max-width: 58ch;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* 手风琴 */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
}
.page-faq .qa__q {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: start;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  transition: color 180ms ease;
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::marker {
  content: "";
}
.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible,
.page-faq .qa[open] .qa__q {
  color: var(--lime);
}
.page-faq .qa__no {
  padding-top: 4px;
  font-size: 11px;
  color: var(--muted);
}
.page-faq .qa__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 4px;
  color: var(--lime);
}
.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 1px;
}
.page-faq .qa__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}
.page-faq .qa__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: transform 180ms ease;
}
.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
}
.page-faq .qa__a {
  padding: 0 0 18px 36px;
  color: var(--silver);
  font-size: 14px;
  line-height: 1.78;
}
.page-faq .qa__a > p {
  margin: 0;
  max-width: 66ch;
}
.page-faq .qa__steps {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: stp;
}
.page-faq .qa__steps li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  counter-increment: stp;
}
.page-faq .qa__steps li::before {
  content: counter(stp, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 2.3;
  color: var(--lime);
}

/* 设备截图 */
.page-faq .faq-shot {
  margin: 24px 0 4px;
  max-width: 540px;
}

/* 底部支持 */
.page-faq .faq-help {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}
.page-faq .faq-help__inner {
  display: grid;
  gap: 30px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 78px) var(--edge);
}
.page-faq .faq-help__copy h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.12;
}
.page-faq .faq-help__copy p {
  margin: 16px 0 22px;
  max-width: 52ch;
  color: var(--silver);
  font-size: 14px;
  line-height: 1.78;
}
.page-faq .faq-help__list {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-help__row dt {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-faq .faq-help__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--white);
  overflow-wrap: anywhere;
}

@media (min-width: 900px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
  .page-faq .faq-main {
    grid-template-columns: var(--faq-col) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 90px);
    align-items: start;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero__mark {
    font-size: 160px;
    top: -0.18em;
    opacity: 0.85;
  }
  .page-faq .faq-hero__meta {
    font-size: 10px;
    gap: 8px 18px;
  }
  .page-faq .qa__q {
    grid-template-columns: 22px minmax(0, 1fr) 16px;
    gap: 8px;
    font-size: 14.5px;
  }
  .page-faq .qa__a {
    padding-left: 0;
  }
  .page-faq .qa__steps li {
    grid-template-columns: 22px minmax(0, 1fr);
  }
  .page-faq .faq-help__row {
    grid-template-columns: 72px minmax(0, 1fr);
  }
  .page-faq .faq-group__head {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__item,
  .page-faq .qa__q,
  .page-faq .qa__icon::after,
  .page-faq .faq-index__link,
  .page-faq .faq-group__head::after {
    transition: none;
  }
}
<<<END>>>