.page-faq {
  --faq-hair: #16222E;
  --faq-glow: rgba(53, 230, 214, 0.32);
  --faq-panel: #0B1119;
  --faq-soft: rgba(53, 230, 214, 0.06);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.24;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), transparent 82%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 34px;
  padding-block: 32px 46px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 6.8vw, 56px);
  line-height: 1.1;
  letter-spacing: 0.05em;
  max-width: 13em;
}

.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 首屏指标 ---------- */
.page-faq .faq-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-metrics li {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-metrics__num {
  font-size: 19px;
  line-height: 1.2;
  color: var(--cyan);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-faq .faq-metrics__num em {
  font-style: normal;
  font-size: 12px;
  margin-left: 2px;
  color: var(--cyan-dim);
}

.page-faq .faq-metrics__cap {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  border-top: 1px solid var(--faq-hair);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  padding-block: 36px 72px;
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 34px;
}

/* ---------- 左栏索引用 ---------- */
.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--faq-hair);
  padding-top: 10px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 12px 9px 10px;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color var(--t) linear, border-color var(--t) linear, background-color var(--t) linear;
}

.page-faq .faq-index__link .mono {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-dim);
  transition: color var(--t) linear;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-mist);
  border-left-color: var(--cyan);
  background-color: var(--faq-soft);
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--cyan-mist);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
  padding-bottom: 44px;
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--faq-hair);
  padding-top: 40px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 16px;
}

.page-faq .faq-group__idx {
  display: inline-block;
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid var(--faq-glow);
  background: var(--faq-soft);
  padding: 6px 7px;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 2.8vw, 25px);
  line-height: 1.3;
  letter-spacing: 0.05em;
  color: var(--text);
}

.page-faq .faq-group__sub {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-faint);
}

/* ---------- 单个问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  transition: color var(--t) linear;
}

.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 {
  color: var(--cyan-mist);
}

.page-faq .qa__mark {
  flex: none;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border: 1px solid var(--grid-line);
  transition: border-color var(--t) linear, background-color var(--t) linear;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan-dim);
  transition: transform var(--t) linear, background-color var(--t) linear;
}

.page-faq .qa__mark::before {
  left: 3px;
  right: 3px;
  top: 7px;
  height: 1px;
}

.page-faq .qa__mark::after {
  top: 3px;
  bottom: 3px;
  left: 7px;
  width: 1px;
  transform-origin: center;
}

.page-faq .qa__q:hover .qa__mark {
  border-color: var(--cyan-dim);
}

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

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

.page-faq .qa[open] .qa__q {
  color: var(--cyan-mist);
}

.page-faq .qa__a {
  max-width: 46em;
  padding: 0 0 20px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a .mono {
  color: var(--cyan);
  font-size: 13px;
}

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

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

/* ---------- 回看章节的图文分栏 ---------- */
.page-faq .faq-group__split {
  display: grid;
  gap: 24px;
}

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

/* ---------- 自助排查 ---------- */
.page-faq .faq-checks {
  display: grid;
  gap: 20px;
}

.page-faq .faq-check {
  position: relative;
  border: 1px solid var(--faq-hair);
  background: var(--faq-panel);
  padding: 20px 18px 22px;
}

.page-faq .faq-check::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-check__title {
  margin: 0 0 16px;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--text);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 16px;
  counter-increment: faqstep;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 22px;
  bottom: 0;
  border-left: 1px dashed rgba(53, 230, 214, 0.26);
  pointer-events: none;
}

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .faq-step__box {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid var(--grid-line);
  background: var(--ink-900);
  cursor: pointer;
  position: relative;
  transition: border-color var(--t) linear, background-color var(--t) linear;
}

.page-faq .faq-step__box:hover {
  border-color: var(--cyan-dim);
}

.page-faq .faq-step__box:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-step__box:checked {
  border-color: var(--cyan);
  background-color: rgba(53, 230, 214, 0.16);
}

.page-faq .faq-step__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(40deg);
}

.page-faq .faq-step__text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
  cursor: pointer;
  transition: color var(--t) linear, opacity var(--t) linear;
}

.page-faq .faq-step__box:checked + .faq-step__text {
  color: var(--text-faint);
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 26px;
}

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

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

.page-faq .faq-cinfo {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-cinfo li {
  display: grid;
  gap: 5px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-cinfo__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

.page-faq .faq-cinfo__v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-cinfo__v.mono {
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-faq .faq-contact__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 42em;
}

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

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-checks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .faq-cinfo li {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    gap: 64px;
    align-items: end;
    padding-block: 52px 62px;
  }

  .page-faq .faq-body {
    padding-block: 48px 96px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

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

  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 38px;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-checks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>