.page-faq {
  --faq-answer: #C9D8E6;
  --faq-sticky-top: 54px;
  --faq-measure: 68ch;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: clamp(20px, 4vw, 36px);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--muted);
}
.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--steel);
}
.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 6vw, 60px) 0 clamp(26px, 5vw, 44px);
}

.page-faq .faq-hero__glyph {
  position: absolute;
  right: -0.05em;
  bottom: -0.32em;
  z-index: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(150px, 40vw, 440px);
  line-height: .78;
  color: transparent;
  -webkit-text-stroke: 2px var(--steel);
  opacity: .6;
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.2vw, 70px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 56ch;
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-stats {
  align-self: end;
  border: 2px solid var(--steel);
  background: var(--panel);
  box-shadow: var(--lift-sm);
  padding: 2px 16px;
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--steel);
}
.page-faq .faq-stat:last-child {
  border-bottom: 0;
}

.page-faq .faq-stat__num {
  flex: 0 0 auto;
  min-width: 4.4em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-stat__label {
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: var(--faq-sticky-top);
  z-index: 12;
  background: var(--deep);
  border-top: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-jump__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump__link {
  display: block;
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 2px solid var(--steel);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 229, 208, .08);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(36px, 7vw, 68px);
  scroll-margin-top: calc(var(--faq-sticky-top) + 70px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--steel);
}

.page-faq .faq-group__idx {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-base);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
  padding-top: .18em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 4.2vw, 42px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-bottom: 1px solid var(--steel);
}

.page-faq .qa {
  border-left: 2px solid var(--steel);
  border-top: 1px solid var(--steel);
  transition: border-left-color .22s var(--ease), background-color .22s var(--ease);
}
.page-faq .qa:first-child {
  border-top: 0;
}
.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: rgba(14, 42, 71, .55);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:hover .qa__label {
  color: var(--cyan-soft);
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: .42em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--muted);
  transition: color .22s var(--ease);
}
.page-faq .qa[open] .qa__idx {
  color: var(--cyan);
}

.page-faq .qa__label {
  flex: 1 1 auto;
  font-size: var(--fs-md);
  font-weight: 500;
  line-height: 1.55;
  transition: color .18s var(--ease);
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: .42em;
  border: 2px solid var(--steel);
  transition: border-color .22s var(--ease), background-color .22s var(--ease);
}
.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--muted);
  transform: translate(-50%, -50%);
}
.page-faq .qa__mark::before {
  width: 8px;
  height: 2px;
}
.page-faq .qa__mark::after {
  width: 2px;
  height: 8px;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}
.page-faq .qa[open] .qa__mark {
  border-color: var(--cyan);
}
.page-faq .qa[open] .qa__mark::before {
  background: var(--cyan);
}
.page-faq .qa[open] .qa__mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 0 16px 20px 16px;
  max-width: var(--faq-measure);
  animation: faq-reveal .22s var(--ease) both;
}

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-faq .qa__body p {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--faq-answer);
}

.page-faq .qa__body .btn {
  margin-top: 14px;
}

.page-faq .qa-time {
  display: inline-block;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .92em;
  color: var(--cyan);
  background: rgba(0, 229, 208, .12);
  border-bottom: 1px solid rgba(0, 229, 208, .45);
  white-space: nowrap;
}

/* ---------- 点阵分隔 ---------- */
.page-faq .faq-dots {
  height: 6px;
  margin-top: clamp(34px, 6vw, 62px);
  background-image: radial-gradient(var(--steel) 1.5px, transparent 1.5px);
  background-size: 9px 6px;
  background-repeat: repeat-x;
  opacity: .85;
}

/* ---------- 图解 ---------- */
.page-faq .faq-figure {
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-faq .faq-figure__frame {
  border: 2px solid var(--steel);
  background: var(--panel);
  box-shadow: var(--lift);
  overflow: hidden;
}
.page-faq .faq-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-top: 12px;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--muted);
  max-width: 78ch;
}

.page-faq .faq-figure__no {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--orange);
}

/* ---------- 收束面板 ---------- */
.page-faq .faq-cta {
  padding: clamp(46px, 8vw, 92px) 0 clamp(56px, 9vw, 112px);
}

.page-faq .faq-cta__box {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(22px, 4vw, 44px);
  background: var(--pale);
  color: var(--deep);
  border: 3px solid var(--cyan);
  box-shadow: var(--lift);
}

.page-faq .faq-cta__box .eyebrow {
  color: var(--teal);
}

.page-faq .faq-cta__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 40px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--deep);
  max-width: 24ch;
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: var(--fs-base);
  line-height: 1.75;
  color: #24415f;
}

.page-faq .faq-cta__aside {
  display: grid;
  gap: 20px;
  align-content: start;
}

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

.page-faq .faq-cta__list li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: #24415f;
}
.page-faq .faq-cta__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--orange);
}

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

.page-faq .faq-cta__box .btn--ghost {
  color: var(--deep);
  border-color: var(--deep);
}
.page-faq .faq-cta__box .btn--ghost:hover,
.page-faq .faq-cta__box .btn--ghost:focus-visible {
  color: var(--deep);
  border-color: var(--orange);
  background: rgba(255, 106, 26, .16);
}

/* ---------- 焦点态 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-faq .qa__q {
    padding: 18px 20px;
  }
  .page-faq .qa__body {
    padding: 0 20px 24px 20px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq {
    --faq-sticky-top: 76px;
  }

  .page-faq .faq-hero {
    padding: clamp(40px, 6vw, 76px) 0 clamp(34px, 5vw, 54px);
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(280px, .68fr);
    align-items: end;
    column-gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-stats {
    padding: 4px 20px;
  }

  .page-faq .faq-stat {
    display: block;
    padding: 16px 0;
  }
  .page-faq .faq-stat__num {
    display: block;
    min-width: 0;
    font-size: clamp(26px, 2.6vw, 34px);
  }
  .page-faq .faq-stat__label {
    display: block;
    margin-top: 4px;
  }

  .page-faq .faq-jump__list {
    padding: 14px 0;
  }

  .page-faq .qa__q {
    padding: 20px 24px;
  }
  .page-faq .qa__body {
    padding: 0 24px 26px 24px;
  }

  .page-faq .faq-cta__box {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    column-gap: clamp(28px, 5vw, 64px);
    align-items: start;
    padding: clamp(30px, 4vw, 52px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 0 24px;
  }
  .page-faq .faq-group__idx {
    grid-row: span 1;
    padding-top: 0;
  }
  .page-faq .faq-group__note {
    padding-bottom: .35em;
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark,
  .page-faq .qa__mark::after,
  .page-faq .qa__idx,
  .page-faq .qa__label,
  .page-faq .faq-jump__link {
    transition: none;
  }
  .page-faq .qa__body {
    animation: none;
  }
}