.page-faq {
  --faq-cat-access: var(--cyan);
  --faq-cat-filter: var(--orange);
  --faq-cat-install: var(--gold);
  --faq-cat-data: var(--orange-soft);
  --faq-cat-feedback: var(--cyan);
  --faq-shadow: 5px 6px 0 rgba(0, 0, 0, .38);
  padding-bottom: 64px;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-faq .breadcrumbs {
  padding: 18px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .breadcrumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumbs span[aria-hidden="true"] {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: 26px 0 34px;
}

.page-faq .faq-hero__copy .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 4px;
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--paper);
  border-left: 6px solid var(--orange);
  padding-left: 14px;
}

.page-faq .faq-hero__copy .lede {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .86;
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__tags li {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--paper);
  background: var(--ink-panel);
  border: 1px solid var(--line);
  padding: 5px 11px;
}

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

.page-faq .faq-hero__media .media-frame {
  border: 2px solid var(--paper);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-hero__cap {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--line);
  padding-left: 10px;
}

/* ---------- 筛选条 ---------- */

.page-faq .faq-filter-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding: 16px 0 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-filter-label {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 3px;
  white-space: nowrap;
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  font: inherit;
  font-size: 13px;
  color: var(--paper);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .filter-btn::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  transition: background .2s var(--ease);
}

.page-faq .filter-btn:hover {
  border-color: var(--orange-soft);
  color: #fff;
}

.page-faq .filter-btn[aria-pressed="true"] {
  border-color: var(--cyan);
  color: #fff;
}

.page-faq .filter-btn[aria-pressed="true"]::before {
  background: var(--cyan);
}

/* ---------- 问答便签叠 ---------- */

.page-faq .faq-columns {
  column-count: 1;
  column-gap: 20px;
  margin-top: 26px;
}

.page-faq .faq-card {
  position: relative;
  display: block;
  break-inside: avoid;
  margin: 0 0 20px;
  padding: 16px 16px 16px 20px;
  background: var(--paper);
  color: var(--char);
  border: 1px solid var(--paper-2);
  border-radius: 2px;
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--cat, var(--cyan));
}

.page-faq .faq-card[data-cat="access"] { --cat: var(--faq-cat-access); }
.page-faq .faq-card[data-cat="filter"] { --cat: var(--faq-cat-filter); }
.page-faq .faq-card[data-cat="install"] { --cat: var(--faq-cat-install); }
.page-faq .faq-card[data-cat="data"] { --cat: var(--faq-cat-data); }
.page-faq .faq-card[data-cat="feedback"] { --cat: var(--faq-cat-feedback); }

.page-faq .faq-card__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px 12px;
  align-items: start;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-card__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--char);
  border: 1px solid var(--char);
  flex: none;
}

.page-faq .faq-card__cat {
  display: block;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-card__q {
  display: block;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--char);
  transition: color .2s var(--ease);
}

.page-faq .faq-card__summary:hover .faq-card__q {
  color: var(--orange);
}

.page-faq .faq-card__arrow {
  width: 0;
  height: 0;
  margin-top: 10px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--char);
  transition: transform .25s var(--ease), border-top-color .25s var(--ease);
}

.page-faq .faq-card[open] .faq-card__arrow {
  transform: rotate(180deg);
  border-top-color: var(--orange);
}

.page-faq .faq-card__answer {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--paper-2);
}

.page-faq .faq-card__answer p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: #2b3330;
}

.page-faq .faq-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color .2s var(--ease);
}

.page-faq .faq-card__link::after {
  content: "→";
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-card__link:hover {
  color: var(--orange);
}

.page-faq .faq-card__link:hover::after {
  transform: translateX(3px);
}

/* ---------- 安装自查 ---------- */

.page-faq .faq-check {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 44px;
  padding: 24px 20px;
  background: var(--ink-panel);
  border: 1px solid var(--line);
}

.page-faq .faq-check::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-width: 0 22px 22px 0;
  border-style: solid;
  border-color: transparent var(--ink) transparent transparent;
}

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

.page-faq .faq-check__media .media-frame {
  border: 2px solid var(--paper);
}

.page-faq .faq-check__body .eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 3px;
}

.page-faq .faq-check__body .section-title {
  margin: 0 0 18px;
  font-size: 22px;
  line-height: 1.3;
  font-weight: 900;
  color: var(--paper);
  border-left: 6px solid var(--orange);
  padding-left: 12px;
}

.page-faq .faq-check__steps {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-check__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding-bottom: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-check__steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-check__steps .fig {
  display: inline-block;
  padding: 2px 6px;
  font-size: 12px;
  line-height: 1.2;
  color: var(--cyan);
  border: 1px solid var(--line);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 40px;
  padding: 24px 20px;
  background: var(--ink-deep);
  border-top: 3px solid var(--orange);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.35;
  font-weight: 900;
  color: var(--paper);
}

.page-faq .faq-cta__text p {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .82;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero__title {
    font-size: 38px;
  }

  .page-faq .faq-check {
    padding: 30px 26px;
  }

  .page-faq .faq-cta {
    padding: 30px 28px;
  }
}

@media (min-width: 860px) {
  .page-faq .breadcrumbs {
    padding-top: 24px;
  }

  .page-faq .faq-hero {
    grid-template-columns: 1.618fr 1fr;
    align-items: end;
    gap: 44px;
    padding: 30px 0 46px;
  }

  .page-faq .faq-hero__title {
    font-size: 44px;
  }

  .page-faq .faq-hero__copy .lede {
    font-size: 16px;
  }

  .page-faq .faq-columns {
    column-count: 2;
    column-gap: 30px;
    margin-top: 30px;
  }

  .page-faq .faq-card {
    margin-bottom: 26px;
    padding: 18px 20px 18px 24px;
  }

  .page-faq .faq-check {
    grid-template-columns: 1fr 1.618fr;
    gap: 36px;
    align-items: center;
    margin-top: 54px;
    padding: 38px;
  }

  .page-faq .faq-check__body .section-title {
    font-size: 26px;
  }

  .page-faq .faq-cta {
    grid-template-columns: 1.618fr auto;
    align-items: center;
    gap: 30px;
    margin-top: 48px;
    padding: 34px 36px;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card__arrow,
  .page-faq .faq-card__q,
  .page-faq .faq-card__link,
  .page-faq .faq-card__link::after,
  .page-faq .filter-btn {
    transition: none;
  }
}
<<<END>>>