.page-faq {
  --faq-index-w: 212px;
  --faq-ink-soft: #46535b;
  --faq-rule: rgba(16, 57, 74, 0.14);
  background: var(--salt-50);
  color: var(--ink-900);
  padding: var(--step-1) 0 var(--step-3);
}

.page-faq .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ---------- 页首信息带 ---------- */
.page-faq .faq-head {
  padding-top: 6px;
}

.page-faq .faq-head h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--lake-900);
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-faq .faq-head .lede {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

.page-faq .faq-hero__fig {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--faq-rule);
  background: linear-gradient(160deg, #FAF8F4 0%, #E3EDF0 58%, #F1DCCF 100%);
  aspect-ratio: 3 / 2;
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-hero__panel {
  border-radius: var(--radius);
  border: 1px solid var(--faq-rule);
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.page-faq .faq-hero__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--lake-600);
  text-transform: uppercase;
}

.page-faq .faq-hero__panel .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
}

.page-faq .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.1rem, 2.8vw, 1.45rem);
  line-height: 1.2;
  color: var(--lake-900);
}

.page-faq .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--steel-500);
}

/* ---------- 主体：索引 + 问答 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 24px;
  margin-top: var(--step-2);
}

.page-faq .faq-index {
  border-left: 1px solid var(--faq-rule);
  padding-left: 12px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--steel-500);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  border-left: 3px solid transparent;
  color: var(--lake-900);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 120ms var(--ease), border-color 120ms var(--ease),
    transform 120ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--ochre-100);
  border-left-color: var(--ochre-500);
  transform: translateX(2px);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  color: var(--ochre-500);
}

.page-faq .faq-index__label {
  font-weight: 700;
  font-size: 14px;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--steel-500);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 88px;
}

.page-faq .faq-group + .faq-group {
  margin-top: var(--step-2);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ochre-500);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  letter-spacing: -0.01em;
  color: var(--lake-900);
}

.page-faq .faq-group__note {
  margin: 12px 0 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel-500);
  max-width: 58ch;
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  padding-left: 10px;
  transition: border-color 120ms var(--ease), background-color 120ms var(--ease);
}

.page-faq .faq-q[open] {
  border-left-color: var(--ochre-500);
  background: rgba(255, 255, 255, 0.66);
}

.page-faq .faq-q > summary {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 10px;
  padding: 14px 36px 14px 4px;
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-q > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q > summary::after {
  content: "+";
  position: absolute;
  top: 12px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--ochre-500);
  transition: color 120ms var(--ease), transform 120ms var(--ease);
}

.page-faq .faq-q[open] > summary::after {
  content: "−";
}

.page-faq .faq-q > summary:hover::after {
  transform: translateX(2px);
}

.page-faq .faq-q > summary:focus-visible {
  outline: 2px solid var(--ochre-500);
  outline-offset: 2px;
}

.page-faq .faq-q__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  color: var(--ochre-500);
  padding-top: 4px;
}

.page-faq .faq-q__main {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  min-width: 0;
}

.page-faq .faq-q__ask {
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-900);
}

.page-faq .status {
  flex-shrink: 0;
  white-space: nowrap;
}

.page-faq .faq-q__body {
  padding: 0 20px 18px 4px;
}

.page-faq .faq-q__body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

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

.page-faq .faq-q__body a {
  color: var(--lake-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-q__body a:hover,
.page-faq .faq-q__body a:focus-visible {
  color: var(--ochre-500);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--lake-600);
}

/* ---------- 安装组配图 ---------- */
.page-faq .faq-fig {
  margin: 20px 0 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--faq-rule);
  background: var(--paper);
}

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

.page-faq .faq-fig figcaption {
  padding: 10px 12px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel-500);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 咨询收尾 ---------- */
.page-faq .faq-cta {
  margin-top: var(--step-2);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 32px);
  background: linear-gradient(150deg, #FFFFFF 0%, #F1DCCF 64%, #E0ECEF 100%);
  display: grid;
  gap: 22px;
}

.page-faq .faq-cta h2 {
  margin: 6px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.8vw, 1.7rem);
  letter-spacing: -0.01em;
  color: var(--lake-900);
}

.page-faq .faq-cta__text p {
  margin: 0 0 18px;
  max-width: 60ch;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-cta__contact {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 16px;
  border-radius: 10px;
  border: 1px solid rgba(16, 57, 74, 0.16);
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-500);
  flex-shrink: 0;
}

.page-faq .faq-contact__v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-900);
  min-width: 0;
  word-break: break-word;
}

.page-faq .copy-btn {
  flex-shrink: 0;
  margin-left: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: stretch;
    gap: 28px;
  }

  .page-faq .faq-hero__fig {
    aspect-ratio: auto;
    min-height: 260px;
  }

  .page-faq .faq-hero__fig img {
    height: 100%;
    min-height: 260px;
  }

  .page-faq .faq-group--install .faq-group__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-group--install .faq-fig {
    margin-top: 0;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    justify-content: flex-start;
    border-left-width: 3px;
    padding: 9px 8px 9px 10px;
  }

  .page-faq .faq-index__count {
    margin-left: auto;
  }

  .page-faq .faq-group--install .faq-group__body {
    grid-template-columns: minmax(0, 1fr) 280px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-q,
  .page-faq .faq-q > summary::after {
    transition: none;
  }

  .page-faq .faq-q > summary:hover::after {
    transform: none;
  }
}