.page-faq {
  padding-block-end: 96px;
  --faq-matrix-gap: 6px;
}

.page-faq a {
  color: var(--lake);
}

.page-faq a:hover {
  color: var(--sunset);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  margin: 28px 0 0;
}

.page-faq .faq-crumbs ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-faq .faq-crumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--print);
}

.page-faq .faq-crumbs li + li::before {
  content: "/";
  color: var(--print);
}

.page-faq .faq-crumbs a {
  text-decoration: none;
  color: var(--lake);
}

.page-faq .faq-crumbs [aria-current] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 40px;
  padding: 40px 0 64px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(40px, 11vw, 76px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--ink);
  font-weight: 900;
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-facts {
  margin: 0;
  border-top: 2px solid var(--ink);
}

.page-faq .faq-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-facts dt {
  font-size: 14px;
  color: var(--ink-70);
}

.page-faq .faq-facts dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--mono);
  color: var(--lake);
}

.page-faq .faq-facts__num {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .faq-facts__unit {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--print);
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 72px;
    align-items: end;
    padding: 72px 0 88px;
  }
}

/* ---------- 场景矩阵 ---------- */
.page-faq .faq-matrix-sec {
  position: relative;
  isolation: isolate;
  padding: 72px 0 0;
}

.page-faq .faq-matrix__media {
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(62%, 680px);
  opacity: .1;
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-matrix__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.7);
}

.page-faq .faq-matrix__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-matrix-scroll {
  margin-top: 36px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.page-faq .faq-matrix {
  display: grid;
  grid-template-columns: 130px repeat(4, minmax(104px, 1fr));
  gap: var(--faq-matrix-gap);
  min-width: 620px;
}

.page-faq .faq-matrix__corner,
.page-faq .faq-matrix__colhead,
.page-faq .faq-matrix__rowhead {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.5;
  color: var(--ink-70);
  padding: 10px 8px;
}

.page-faq .faq-matrix__corner {
  color: var(--print);
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-matrix__colhead {
  border-bottom: 2px solid var(--ink);
  text-align: right;
}

.page-faq .faq-matrix__rowhead {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0;
}

.page-faq .faq-matrix__cell {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  min-height: 78px;
  padding: 10px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.page-faq .faq-matrix__num {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-faq .faq-cell--plain {
  background: rgba(138, 151, 163, .12);
  color: var(--ink-70);
}

.page-faq .faq-cell--low {
  background: rgba(27, 111, 168, .10);
  color: var(--ink);
}

.page-faq .faq-cell--mid {
  background: rgba(27, 111, 168, .26);
  color: var(--ink);
}

.page-faq .faq-cell--high {
  background: var(--lake);
  color: var(--snow);
}

.page-faq .faq-cell--high .faq-matrix__num {
  color: var(--snow);
}

.page-faq .faq-matrix__cell:hover,
.page-faq .faq-matrix__cell:focus-visible {
  border-color: var(--sunset);
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper-hover);
}

.page-faq .faq-matrix__cell:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-matrix__note {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-70);
}

.page-faq .faq-matrix__note a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 分组与问答 ---------- */
.page-faq .faq-group {
  margin-top: 76px;
  padding-top: 26px;
  border-top: 2px solid var(--ink);
  scroll-margin-top: 96px;
}

.page-faq .faq-group:target {
  animation: faq-target 2.6s var(--ease);
}

@keyframes faq-target {
  0% {
    background: var(--sunset-soft);
    box-shadow: inset 3px 0 0 var(--sunset);
  }
  72% {
    background: var(--sunset-soft);
    box-shadow: inset 3px 0 0 var(--sunset);
  }
  100% {
    background: transparent;
    box-shadow: inset 0 0 0 transparent;
  }
}

.page-faq .faq-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: border-color .16s var(--ease);
}

.page-faq .faq-item[open] {
  border-bottom-color: var(--sunset);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 14px;
  align-items: start;
  gap: 10px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-item__idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--print);
  padding-top: 5px;
}

.page-faq .faq-item__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color .16s var(--ease);
}

.page-faq .faq-item__q:hover .faq-item__title {
  color: var(--lake);
}

.page-faq .faq-item__mark {
  width: 10px;
  height: 10px;
  margin-top: 8px;
  justify-self: end;
  border-right: 2px solid var(--sunset);
  border-bottom: 2px solid var(--sunset);
  transform: rotate(45deg);
  transition: transform .2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 0 22px 68px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .ruleblock {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--sunset);
  background: var(--sunset-soft);
  color: var(--ink);
}

.page-faq .ruleblock p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .ruleblock__title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  font-weight: 700;
  color: var(--ink);
}

@media (min-width: 760px) {
  .page-faq .faq-item__q {
    grid-template-columns: 72px minmax(0, 1fr) 16px;
    gap: 16px;
    padding: 20px 0;
    align-items: center;
  }

  .page-faq .faq-item__title {
    font-size: 17px;
  }

  .page-faq .faq-item__idx {
    padding-top: 0;
  }

  .page-faq .faq-item__mark {
    margin-top: 0;
  }

  .page-faq .faq-item__a {
    padding-left: 88px;
  }
}

/* ---------- 设备自查 ---------- */
.page-faq .faq-device {
  display: grid;
  gap: 36px;
  margin-top: 28px;
}

.page-faq .faq-device__media {
  margin: 0;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  background: var(--ink-2);
}

.page-faq .faq-device__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-faq .faq-device__media figcaption {
  padding: 12px 16px;
  background: var(--ink-2);
  color: var(--lake-soft);
  font-size: 13px;
  line-height: 1.7;
}

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

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 30px;
}

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

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

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 46px;
  bottom: 4px;
  border-left: 2px dashed var(--lake-soft);
}

.page-faq .faq-steps__num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--lake);
  border-radius: 50%;
  background: var(--snow);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--lake);
}

.page-faq .faq-steps__body h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .faq-steps__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .faq-list--compact {
  margin-top: 32px;
}

@media (min-width: 900px) {
  .page-faq .faq-device {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
    margin-top: 36px;
  }
}

/* ---------- 联系前准备 ---------- */
.page-faq .faq-prepare {
  display: grid;
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-prepare__item {
  padding: 22px 20px 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  transition: transform .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.page-faq .faq-prepare__item:hover {
  transform: translateY(-2px);
  border-color: var(--sunset);
  box-shadow: var(--shadow-paper-hover);
}

.page-faq .faq-prepare__idx {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sunset);
}

.page-faq .faq-prepare__item h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-prepare__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-70);
}

.page-faq .faq-prepare__foot {
  margin: 28px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .faq-prepare__foot a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 700px) {
  .page-faq .faq-prepare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-prepare {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: 80px;
}

.page-faq .faq-cta__panel {
  padding: 40px 26px 44px;
  background: var(--ink-2);
  border-left: 3px solid var(--sunset);
  color: var(--snow);
}

.page-faq .faq-cta__eyebrow {
  color: var(--neon);
}

.page-faq .faq-cta__title {
  margin: 14px 0 0;
  color: var(--snow);
}

.page-faq .faq-cta__lead {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--lake-soft);
}

.page-faq .faq-cta .btn {
  margin-top: 26px;
}

@media (min-width: 760px) {
  .page-faq .faq-cta__panel {
    padding: 56px 48px 60px;
  }
}

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

  .page-faq .faq-matrix__cell,
  .page-faq .faq-prepare__item,
  .page-faq .faq-item__mark {
    transition: none;
  }
}
</main>