.page-faq {
  --faq-sticky: 88px;
  --faq-nav-w: 236px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 4vw, 44px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 92% 0%, rgba(200, 255, 77, 0.06), transparent 58%),
    linear-gradient(180deg, rgba(18, 26, 22, 0.85), rgba(11, 20, 16, 0));
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.5vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 6.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: var(--ink);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-2);
}

.page-faq .faq-hero__facts b {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

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

.page-faq .faq-hero__frame {
  border: 1px solid var(--line);
}

.page-faq .faq-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}

@media (min-width: 760px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero__facts li + li {
    padding-left: 16px;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 64px) 0 0;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

/* ---------- 左侧目录锚点 ---------- */
.page-faq .faq-nav__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-nav__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14px;
  transition: color 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-faq .faq-nav__list li:last-child .faq-nav__link {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--ink);
  padding-left: 4px;
}

.page-faq .faq-nav__link:focus-visible {
  outline: 1px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .faq-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
  }
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--faq-sticky) + 10px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 5vw, 68px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: -0.006em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  margin: 10px 0 18px;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 2px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--lime);
}

.page-faq .faq-item__q:focus-visible {
  outline: 1px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--ink-2);
  transition: transform 240ms var(--ease), opacity 240ms var(--ease), background 240ms var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 50%;
  width: 16px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  left: 50%;
  top: 0;
  width: 1px;
  height: 16px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
}

.page-faq .faq-item__q:hover .faq-item__mark::before,
.page-faq .faq-item__q:hover .faq-item__mark::after,
.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--lime);
}

.page-faq .faq-item__a {
  max-width: 70ch;
  padding: 0 2px 20px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__a a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 77, 0.45);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--lime);
}

/* ---------- 步骤编号 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
  transition: color 200ms var(--ease);
}

.page-faq .faq-steps li:hover {
  color: var(--ink);
}

.page-faq .faq-steps__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-item__a .faq-steps + p {
  margin-top: 12px;
}

/* ---------- 筛选章节示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure__frame {
  border: 1px solid var(--line);
  transition: border-color 240ms var(--ease);
}

.page-faq .faq-figure:hover .faq-figure__frame {
  border-color: var(--lime);
}

.page-faq .faq-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.75) brightness(0.88);
}

.page-faq .faq-figure .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--ink-3);
}

/* ---------- 尾部指路 ---------- */
.page-faq .faq-next {
  margin-top: clamp(44px, 6vw, 84px);
  padding: 26px 0 clamp(36px, 6vw, 72px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-next__text {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-nav__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-steps li,
  .page-faq .faq-figure__frame {
    transition: none;
  }
}