.page-faq {
  --faq-rail: 244px;
  --faq-gap: clamp(24px, 3.4vw, 46px);
  --faq-sticky: calc(var(--header-h) + 20px);
  background: var(--ink);
  color: var(--body-text);
  padding-bottom: clamp(56px, 9vw, 104px);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--bw) solid var(--line);
  background:
    radial-gradient(circle at 84% 8%, rgba(34, 211, 238, 0.20), transparent 58%),
    radial-gradient(circle at 6% 96%, rgba(255, 77, 46, 0.13), transparent 54%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(circle at 82% 26%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 82% 26%, #000 0%, transparent 68%);
}

.page-faq .faq-hero__inner {
  position: relative;
  padding: clamp(30px, 5vw, 68px) 0 clamp(34px, 5vw, 76px);
}

.page-faq .faq-hero h1 {
  max-width: 24ch;
  margin: 16px 0 0;
}

.page-faq .faq-hero .ls-lede {
  max-width: 54ch;
  margin-top: 18px;
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: var(--bw) solid var(--edge);
  background: rgba(16, 35, 58, 0.7);
  color: var(--mist);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.16s var(--ease), background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4vw, 54px);
}

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

.page-faq .faq-index__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

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

.page-faq .faq-index__sechead {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 7px;
  border-bottom: var(--bw) solid var(--line);
  color: var(--paper);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-index__sechead:hover,
.page-faq .faq-index__sechead:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-index__no {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .faq-index__nums {
  display: none;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 9px;
}

.page-faq .faq-index__nums a {
  padding: 5px 7px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.16s var(--ease), background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-index__nums a:hover,
.page-faq .faq-index__nums a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-section {
  padding-top: clamp(26px, 3.4vw, 42px);
  border-top: var(--bw) solid var(--line);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(34px, 5vw, 62px);
}

.page-faq .faq-section__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.page-faq .faq-section__head h2 {
  margin: 0;
}

.page-faq .faq-secno {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-section__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  border-top: var(--bw) solid var(--edge);
}

.page-faq .faq-item {
  border-bottom: var(--bw) solid var(--line);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-item[open] {
  border-bottom-color: var(--cyan);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.07), rgba(16, 35, 58, 0.45));
}

.page-faq .faq-item summary {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 40px 16px 2px;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  font-family: var(--font-head);
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  transition: color 0.16s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 14px;
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "\2013";
  color: var(--flare);
}

.page-faq .faq-item summary:hover {
  color: var(--cyan-soft);
}

.page-faq .faq-item__no {
  flex: none;
  width: 26px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  color: var(--mist);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--cyan);
}

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

.page-faq .faq-item__a {
  padding: 0 40px 18px 40px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.45);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-answer-in 0.12s var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-num {
  color: var(--cyan-soft);
  font-weight: 600;
}

/* ---------- 图文双栏 ---------- */
.page-faq .faq-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

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

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--bw) solid var(--edge);
  background: var(--ink-2);
  box-shadow: var(--shadow);
}

.page-faq .faq-fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 状态点图例 ---------- */
.page-faq .faq-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 18px 0 0;
  padding: 12px 14px;
  list-style: none;
  border: var(--bw) solid var(--edge);
  background: rgba(16, 35, 58, 0.5);
}

.page-faq .faq-legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-faq .faq-dot--mint {
  background: var(--mint);
  animation: faq-pulse 1.6s var(--ease) infinite;
}

.page-faq .faq-dot--cyan {
  background: var(--cyan);
}

.page-faq .faq-dot--grey {
  background: var(--mist);
  opacity: 0.5;
}

@keyframes faq-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(57, 255, 136, 0.45);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(57, 255, 136, 0);
  }
}

/* ---------- 旁注 ---------- */
.page-faq .faq-note {
  margin-top: 20px;
  padding: 14px 16px;
  border: var(--bw) solid var(--edge);
  border-left: 6px solid var(--cyan);
  background: rgba(16, 35, 58, 0.6);
}

.page-faq .faq-note p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.45);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 收尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(26px, 3.6vw, 44px);
  padding: clamp(20px, 3vw, 32px);
  border: var(--bw) solid var(--edge);
  box-shadow: var(--shadow-lift);
  background:
    radial-gradient(circle at 92% 0%, rgba(34, 211, 238, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
}

.page-faq .faq-cta .ls-h3 {
  margin: 12px 0 10px;
  color: var(--paper);
}

.page-faq .faq-cta .ls-p {
  margin: 0 0 20px;
  max-width: 58ch;
  color: var(--body-text);
}

.page-faq .faq-contact {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: var(--bw) solid var(--line);
  font-family: var(--font-data);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact strong {
  margin-right: 6px;
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-section__head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    gap: 8px 16px;
  }

  .page-faq .faq-section__head h2 {
    grid-column: 2;
  }

  .page-faq .faq-section__head .faq-secno {
    grid-row: 1;
    grid-column: 1;
  }

  .page-faq .faq-section__lede {
    grid-column: 2;
  }

  .page-faq .faq-item__a {
    padding-left: 40px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-duo {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .faq-fig {
    position: sticky;
    top: var(--faq-sticky);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 44px);
    overflow-y: auto;
    padding-right: 6px;
    border-top: var(--bw) solid var(--edge);
    padding-top: 16px;
  }

  .page-faq .faq-index__nums {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a,
  .page-faq .faq-dot--mint {
    animation: none;
  }

  .page-faq .faq-jump a,
  .page-faq .faq-item,
  .page-faq .faq-index__sechead,
  .page-faq .faq-index__nums a {
    transition: none;
  }
}