.page-faq {
  --faq-indent: 34px;
  background: var(--night);
  color: var(--paper);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 36px 0 40px;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(140% 100% at 92% -12%, rgba(79, 227, 208, 0.13), transparent 58%),
    linear-gradient(158deg, var(--stand) 0%, var(--night) 74%);
}

.page-faq .faq-hero__eyebrow {
  margin: 26px 0 0;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 22ch;
  font-size: clamp(30px, 7.4vw, 68px);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--paper);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-hero__meta b {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--orange);
  margin-right: 4px;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding: 36px 0 8px;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

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

/* ---------- 侧边目录 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--rule);
  padding-top: 16px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

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

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.4;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(79, 227, 208, 0.08);
}

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

.page-faq .faq-index__hint {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组区 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h-compact) + 20px);
}

.page-faq .faq-section + .faq-section {
  margin-top: 68px;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-section__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .faq-section__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 300;
  line-height: 1.32;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-section__intro {
  margin: 16px 0 4px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

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

/* ---------- 问答折叠 ---------- */
.page-faq .qa-list {
  margin-top: 4px;
}

.page-faq .qa {
  border-bottom: 1px solid var(--rule);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 19px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

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

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

.page-faq .qa__summary:hover .qa__num {
  color: var(--orange-soft);
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__chev {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  margin-left: auto;
  color: var(--cyan);
  transition: transform 0.3s var(--ease);
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(180deg);
}

.page-faq .qa__body {
  padding: 2px 0 24px;
  animation: faq-reveal 0.3s var(--ease) both;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  padding-left: var(--faq-indent);
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper);
}

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

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 查找路径 ---------- */
.page-faq .path-steps {
  counter-reset: none;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .path-steps li {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}

.page-faq .path-steps li:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-faq .path-steps__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .path-steps__body {
  min-width: 0;
}

.page-faq .path-steps__body strong {
  display: block;
  font-size: 15.5px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .path-steps__body p {
  margin: 6px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 28px 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 18px;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-figure--tower {
  margin: 24px 0 0;
  max-width: 100%;
}

/* ---------- 地图布局 ---------- */
.page-faq .faq-map-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  margin-top: 22px;
}

/* ---------- 故障排查对照 ---------- */
.page-faq .trouble {
  margin-top: 22px;
  border: 1px solid var(--rule);
  border-radius: 16px;
  overflow: hidden;
}

.page-faq .trouble__head {
  display: none;
}

.page-faq .trouble__row {
  padding: 17px 20px;
  background: var(--stand);
}

.page-faq .trouble__row + .trouble__row {
  border-top: 1px solid var(--rule);
}

.page-faq .trouble__symptom {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--orange-soft);
}

.page-faq .trouble__fix {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 反馈清单 ---------- */
.page-faq .checklist {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 46ch;
}

.page-faq .checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  border-radius: 3px;
}

.page-faq .faq-contact-line {
  margin: 26px 0 0;
  max-width: 68ch;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-contact-line a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------- 尾部入口 ---------- */
.page-faq .faq-next {
  padding: 0 0 84px;
}

.page-faq .faq-next .container {
  border-top: 1px solid var(--rule);
  padding-top: 30px;
}

.page-faq .faq-next__title {
  margin: 0 0 20px;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 48px 0 52px;
  }

  .page-faq .faq-section + .faq-section {
    margin-top: 84px;
  }

  .page-faq .qa__summary {
    padding: 21px 0;
  }

  .page-faq .trouble__head {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 28px;
    padding: 13px 20px;
    background: rgba(30, 58, 85, 0.45);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--muted);
    text-transform: uppercase;
  }

  .page-faq .trouble__row {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 28px;
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-map-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-figure--tower {
    margin: 22px 0 0;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    padding: 48px 0 12px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: minmax(196px, 236px) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h-compact) + 30px);
    border-top: 0;
    border-left: 1px solid var(--rule);
    padding: 4px 0 4px 20px;
  }

  .page-faq .faq-index__label {
    margin-bottom: 8px;
  }

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

  .page-faq .faq-index__list li {
    flex: none;
  }

  .page-faq .faq-index__list a {
    display: block;
    padding: 8px 0;
    border: 0;
    border-radius: 0;
    white-space: normal;
    font-size: 13px;
    line-height: 1.6;
    color: var(--muted);
    background: transparent;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    color: var(--cyan);
    background: transparent;
  }

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

  .page-faq .qa__body p {
    font-size: 16px;
  }
}

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

  .page-faq .qa__chev,
  .page-faq .qa__summary,
  .page-faq .qa__num,
  .page-faq .faq-index__list a {
    transition: none;
  }
}