.page-faq {
  --faq-ink: #16283A;
  --faq-soft: #46596E;
  --faq-rule: 1px solid var(--line);
  --faq-gap: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 46px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -20% auto -20%;
  height: 460px;
  background: radial-gradient(60% 60% at 22% 30%, rgba(53, 224, 214, .16), transparent 70%),
              radial-gradient(52% 52% at 82% 12%, rgba(242, 160, 61, .14), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 26px;
}

.page-faq .faq-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 10vw, 5rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin-top: 20px;
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-rule);
  padding-top: 22px;
}

.page-faq .faq-hero-stats .stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-faq .faq-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-hero-stats .stat-label {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-bottom: 88px;
}

/* ---------- 索引栏 ---------- */
.page-faq .faq-index-caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .84rem;
  text-decoration: none;
  color: var(--mist);
  white-space: nowrap;
  background: rgba(18, 40, 63, .5);
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

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

.page-faq .faq-index-num {
  font-weight: 700;
  color: var(--brass);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-faq .faq-index-link.is-current {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-index-link.is-current .faq-index-num {
  color: var(--ink-800);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  border-top: var(--faq-rule);
  padding-top: 30px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: 58px;
}

.page-faq .faq-sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 16px;
  margin-bottom: 26px;
}

.page-faq .faq-sec-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 4.6vw, 2rem);
  line-height: 1.15;
  color: var(--paper);
}

.page-faq .faq-sec-head .tag {
  margin-left: auto;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  background: var(--news);
  color: var(--faq-ink);
  border-radius: var(--r-lg);
  border-left: 3px solid transparent;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

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

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--faq-ink);
}

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

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

.page-faq .faq-q-text {
  flex: 1 1 auto;
}

.page-faq .faq-q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  color: var(--brass);
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 1px;
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}

.page-faq .faq-q-mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q-mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 20px 20px;
  font-family: var(--font-mono);
  font-size: .92rem;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-a a {
  color: #1d5f7a;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-faq .faq-a a:hover {
  color: var(--ink-900);
}

.page-faq .faq-a strong {
  color: var(--faq-ink);
  font-weight: 700;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 22px;
}

.page-faq .faq-figure .img-frame {
  display: block;
}

.page-faq .faq-figure--tall .img-frame {
  max-width: 340px;
}

.page-faq .faq-figure--wide .img-frame {
  max-width: 860px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
}

.page-faq .faq-figure .img-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 设备示意 ---------- */
.page-faq .faq-device-compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin: 26px 0 6px;
}

.page-faq .faq-device {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--glass);
  color: var(--mist);
  transition: border-color .3s var(--ease), color .3s var(--ease), background .3s var(--ease);
}

.page-faq .faq-device:hover,
.page-faq .faq-device:focus-within {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 224, 214, .07);
}

.page-faq .faq-device-icon {
  display: block;
  color: currentColor;
}

.page-faq .faq-device-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper);
}

.page-faq .faq-device:hover .faq-device-name,
.page-faq .faq-device:focus-within .faq-device-name {
  color: var(--cyan);
}

.page-faq .faq-device-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-sec--contact {
  padding-bottom: 8px;
}

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 26px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: linear-gradient(120deg, rgba(110, 42, 60, .45), rgba(59, 46, 110, .4) 55%, rgba(18, 40, 63, .6));
}

.page-faq .faq-cta-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--paper);
}

.page-faq .faq-cta-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 40px 0 60px;
  }

  .page-faq .faq-q {
    padding: 20px 24px;
    font-size: 1.06rem;
  }

  .page-faq .faq-a {
    padding: 0 24px 24px;
  }

  .page-faq .faq-sec {
    padding-top: 38px;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 62px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    background: transparent;
    padding: 11px 14px;
    white-space: normal;
    font-size: .86rem;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(53, 224, 214, .08);
    color: var(--paper);
  }

  .page-faq .faq-index-link.is-current {
    color: var(--cyan);
    background: rgba(53, 224, 214, .1);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-index-link.is-current .faq-index-num {
    color: var(--amber);
  }

  .page-faq .faq-sec-head .tag {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index-link,
  .page-faq .faq-device,
  .page-faq .faq-q-mark::after {
    transition: none;
  }
}