.page-faq {
  --faq-index-w: 236px;
  --faq-shadow: var(--hard);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 22px var(--pad-x) 68px;
  font-family: var(--font-body);
  color: var(--mist-50);
  overflow-wrap: break-word;
}

.page-faq * {
  box-sizing: border-box;
}

.page-faq a {
  color: inherit;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--signal-400);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.page-faq summary:focus-visible {
  outline-offset: -2px;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--mist-300);
}

.page-faq .crumbs a {
  color: var(--mist-300);
  text-decoration: none;
  border-bottom: 1px solid var(--line-500);
  padding-bottom: 1px;
}

.page-faq .crumbs a:hover {
  color: var(--flare-500);
  border-bottom-color: var(--flare-500);
}

.page-faq .crumbs__sep {
  color: var(--line-500);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 24px;
  padding: 24px 18px 26px;
  border: var(--stroke) solid var(--line-500);
  border-left: 6px solid var(--flare-500);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--turf-700) 0%, var(--turf-800) 66%);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal-400);
}

.page-faq .faq-hero h1 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 7.4vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--mist-50);
}

.page-faq .faq-hero__lead {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .faq-hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 14px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line-500);
}

.page-faq .faq-hero__meta-row {
  min-width: 0;
}

.page-faq .faq-hero__meta dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal-400);
}

.page-faq .faq-hero__meta dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.3;
  color: var(--mist-50);
}

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

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--stroke) solid var(--line-500);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-hero__fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-300);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 26px;
  margin-top: 30px;
}

.page-faq .faq-index__inner {
  padding: 14px 12px;
  border: var(--stroke) solid var(--line-500);
  border-radius: var(--radius);
  background: var(--turf-700);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  padding-left: 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist-300);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: block;
  min-height: 44px;
  padding: 11px 12px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist-50);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  transition: background 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--turf-600);
  border-left-color: var(--flare-500);
  color: var(--flare-500);
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 84px;
}

.page-faq .faq-block + .faq-block {
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: 16px;
}

.page-faq .faq-block__code {
  flex: 0 0 auto;
  padding: 3px 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--flare-500);
  border: 1px solid var(--flare-500);
  border-radius: var(--radius);
}

.page-faq .faq-block__head h2 {
  flex: 1 1 200px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 4.4vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist-50);
}

.page-faq .faq-block--more .faq-block__code {
  color: var(--signal-400);
  border-color: var(--signal-400);
}

/* ---------- 折叠项 ---------- */
.page-faq .faq-item {
  border: var(--stroke) solid var(--line-500);
  border-radius: var(--radius);
  background: var(--turf-700);
  transition: border-color 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item:hover {
  border-color: var(--flare-500);
  box-shadow: var(--hard-sm);
}

.page-faq .faq-item[open] {
  background: var(--turf-600);
  box-shadow: var(--hard-sm);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist-300);
  transition: color 160ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--flare-500);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  color: var(--mist-50);
  transition: transform 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-item > summary:hover .faq-item__q {
  transform: translateY(-2px);
  color: var(--flare-500);
}

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

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--flare-500);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  margin: 0 16px 16px 16px;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--flare-500);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-faq .faq-item__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  padding: 6px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--flare-500);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  transition: color 160ms var(--ease);
}

.page-faq .faq-item__link::after {
  content: "→";
  transition: transform 160ms var(--ease);
}

.page-faq .faq-item__link:hover,
.page-faq .faq-item__link:focus-visible {
  color: var(--mist-50);
}

.page-faq .faq-item__link:hover::after,
.page-faq .faq-item__link:focus-visible::after {
  transform: translateX(4px);
}

/* ---------- 更新提醒区块配图 ---------- */
.page-faq .faq-block--split {
  display: grid;
  gap: 22px;
}

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

.page-faq .faq-block__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--stroke) solid var(--line-500);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-block__fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-300);
}

/* ---------- 平板竖屏与桌面 ---------- */
@media (min-width: 700px) {
  .page-faq {
    padding: 28px 26px 84px;
  }

  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 28px;
    padding: 34px 30px;
  }

  .page-faq .faq-hero__fig img {
    box-shadow: var(--hard-sm);
  }

  .page-faq .faq-item > summary {
    padding: 18px 20px;
  }

  .page-faq .faq-item__a {
    margin: 0 20px 20px 20px;
    padding-left: 18px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-faq .faq-index__inner {
    position: sticky;
    top: calc(var(--statusbar-h) + 20px);
  }

  .page-faq .faq-block + .faq-block {
    margin-top: 44px;
    padding-top: 38px;
  }
}

@media (min-width: 1220px) {
  .page-faq .faq-block--split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__link,
  .page-faq .faq-item__link::after,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-item > summary:hover .faq-item__q {
    transform: none;
  }
}