/* ============ page-faq · 问题解答速查手册 ============ */

.page-faq {
  --faq-card-bg: var(--c-paper);
  --faq-hi: rgba(232, 255, 58, 0.42);
  --faq-tint: rgba(14, 110, 122, 0.08);
}

.page-faq .breadcrumb {
  padding-block: clamp(14px, 3vw, 26px);
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  overflow: hidden;
  background: var(--c-night);
  color: var(--c-paper);
  border-bottom: 2px solid var(--c-flag);
  padding-top: clamp(40px, 6vw, 84px);
}

.page-faq .faq-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(201, 212, 220, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 212, 220, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-faq .faq-cover__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-cover__kicker {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-flag);
}

.page-faq .faq-cover__title {
  margin: 0 0 22px;
  font-size: clamp(40px, 9vw, 78px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--c-paper);
}

.page-faq .faq-cover__deck {
  max-width: 62ch;
  margin: 0 0 34px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 248, 249, 0.78);
}

.page-faq .faq-cover__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 0 0 clamp(32px, 5vw, 56px);
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--c-line);
}

.page-faq .faq-cover__facts .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--c-flag);
  margin-right: 6px;
}

.page-faq .faq-cover__media {
  position: relative;
  margin: 0;
  border-top: 1px solid rgba(201, 212, 220, 0.24);
}

.page-faq .faq-cover__media img {
  display: block;
  width: 100%;
  height: clamp(200px, 34vw, 400px);
  max-width: 100%;
  object-fit: cover;
  object-position: center 45%;
  filter: saturate(0.72) contrast(1.05) brightness(0.93);
}

/* ---------- 速查主体：索引 + 答案卡 ---------- */
.page-faq .faq-manual {
  display: grid;
  gap: clamp(28px, 5vw, 44px);
  padding-block: clamp(40px, 7vw, 84px) clamp(48px, 8vw, 96px);
}

.page-faq .faq-rail {
  border-top: 2px solid var(--c-night);
  padding-top: 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-slate);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--c-night);
  text-decoration: none;
  border-left: 2px solid transparent;
  background: rgba(201, 212, 220, 0.16);
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-lake);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--faq-tint);
  border-left-color: var(--c-lake);
}

/* 答案卡 */
.page-faq .faq-manual__body {
  min-width: 0;
}

.page-faq .faq-card {
  position: relative;
  background: var(--faq-card-bg);
  border: 1px solid var(--c-line);
  padding: 20px clamp(16px, 3vw, 30px) 20px calc(clamp(16px, 3vw, 30px) + 6px);
  scroll-margin-top: 28px;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-card + .faq-card {
  margin-top: 16px;
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--c-lake);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 280ms var(--ease);
}

.page-faq .faq-card[open] {
  border-color: var(--c-night);
}

.page-faq .faq-card[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-card__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-card__icon {
  display: none;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--c-line);
  color: var(--c-lake);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-card__icon svg {
  display: block;
  width: 18px;
  height: 18px;
}

.page-faq .faq-card[open] .faq-card__icon {
  border-color: var(--c-lake);
}

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

.page-faq .faq-card__title {
  display: block;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--c-night);
}

.page-faq .faq-card__sub {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.62;
  color: var(--c-slate);
}

.page-faq .faq-card__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--c-slate);
  border-bottom: 2px solid var(--c-slate);
  transform: rotate(45deg);
  transition: transform 260ms var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-card[open] .faq-card__chev {
  transform: rotate(-135deg);
  border-color: var(--c-lake);
}

.page-faq .faq-card__body {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
}

/* 问答条目 */
.page-faq .faq-qa {
  margin: 0;
}

.page-faq .faq-qa dt {
  position: relative;
  padding-left: 16px;
  margin-top: 20px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--c-night);
}

.page-faq .faq-qa dt:first-child {
  margin-top: 0;
}

.page-faq .faq-qa dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--c-lake);
  transform: rotate(45deg);
}

.page-faq .faq-qa dd {
  margin: 8px 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-slate);
}

.page-faq .faq-qa dd a {
  color: var(--c-lake);
  text-underline-offset: 3px;
}

.page-faq .faq-qa dd a:hover,
.page-faq .faq-qa dd a:focus-visible {
  color: var(--c-cyan);
}

.page-faq .faq-qa .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--c-night);
  background: var(--faq-hi);
  padding: 1px 5px;
}

/* 移动端章节的两栏拆分 */
.page-faq .faq-card__split {
  display: grid;
  gap: 22px;
}

.page-faq .faq-card__figure {
  margin: 0;
  max-width: 320px;
}

.page-faq .faq-card__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center 32%;
  border: 1px solid var(--c-line);
  filter: saturate(0.72) contrast(1.04) brightness(0.95);
}

.page-faq .faq-card__figure figcaption {
  margin-top: 8px;
}

/* ---------- 底部咨询 ---------- */
.page-faq .faq-cta {
  background: var(--c-lake);
  color: var(--c-paper);
  border-top: 2px solid var(--c-flag);
  padding-block: clamp(44px, 7vw, 84px);
}

.page-faq .faq-cta__inner {
  max-width: 66ch;
}

.page-faq .faq-cta__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 4.2vw, 36px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-faq .faq-cta__text {
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 248, 249, 0.86);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-card__icon {
    display: grid;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-card {
    padding: 24px clamp(20px, 3vw, 34px) 24px calc(clamp(20px, 3vw, 34px) + 8px);
  }

  .page-faq .faq-card__split {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-card__figure {
    max-width: none;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-manual {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 26px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-rail__link {
    padding: 9px 12px;
    background: transparent;
    border-left: 2px solid var(--c-line);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: var(--faq-tint);
    border-left-color: var(--c-lake);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-card::before,
  .page-faq .faq-card__chev,
  .page-faq .faq-card__icon,
  .page-faq .faq-rail__link {
    transition-duration: 0ms;
  }
}
<<<END>>>