.page-faq {
  --faq-line-strong: #2f4570;
  --faq-line-hover: #26375a;
  --faq-card-hover: #121c33;
  padding-block: calc(var(--anchor-h) + 26px) 84px;
  padding-inline: clamp(16px, 4vw, 64px);
  max-width: 1320px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

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

/* ---------- 首屏 ---------- */

.page-faq .breadcrumbs {
  margin: 0 0 18px;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-3);
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  text-decoration: underline;
}

.page-faq .breadcrumbs a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .faq-hero__tag {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-faq h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 5.2vw, 46px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink-2);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink-3);
}

.page-faq .faq-hero__media .media-frame {
  aspect-ratio: 2 / 1;
}

.page-faq .media-frame__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--ink-3);
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  margin-top: 48px;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

.page-faq .faq-index__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-right: 1px solid var(--line);
  color: var(--ink-2);
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-index__item:last-child {
  border-right: 0;
}

.page-faq .faq-index__item:hover {
  background: var(--faq-card-hover);
  color: var(--ink);
}

.page-faq .faq-index__item:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
  color: var(--ink);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .faq-index__name {
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -.01em;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  margin-top: 62px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__side {
  margin-bottom: 20px;
}

.page-faq .faq-group__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1.28;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-3);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  transition: border-color .18s var(--ease);
}

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

.page-faq .faq-item:hover {
  border-color: var(--faq-line-hover);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-line-strong);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(231, 180, 76, .1) 100%);
  pointer-events: none;
}

.page-faq .faq-item summary {
  list-style: none;
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color .18s var(--ease);
}

.page-faq .faq-item__q:hover {
  color: #ffffff;
}

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

.page-faq .faq-item__q::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg) translate(-1px, -1px);
  transition: transform .2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-faq .faq-item__mark {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--gold);
}

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

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

.page-faq .faq-item__short {
  margin: 0 0 10px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-item__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .faq-item__link {
  display: inline-block;
  margin-top: 13px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(53, 224, 214, .34);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-item__link:hover {
  color: #6df0e8;
  border-bottom-color: var(--cyan);
}

.page-faq .faq-item__link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-reveal .22s var(--ease) both;
}

/* ---------- 分组配图 ---------- */

.page-faq .faq-group__figure {
  margin: 18px 0 0;
}

.page-faq .media-frame.faq-figure {
  aspect-ratio: 1 / 1;
  max-width: 520px;
}

/* ---------- 页尾收束 ---------- */

.page-faq .faq-tail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 58px;
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: linear-gradient(120deg, rgba(231, 180, 76, .07) 0%, rgba(14, 21, 38, .94) 44%);
}

.page-faq .faq-tail__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-faq .faq-tail__link {
  flex: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: center;
  }

  .page-faq .faq-group {
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-group__side {
    position: sticky;
    top: calc(var(--anchor-h) + 22px);
    margin-bottom: 0;
  }
}

@media (max-width: 560px) {
  .page-faq {
    line-height: 1.7;
  }

  .page-faq .faq-index__item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .page-faq .faq-index__item:last-child {
    border-bottom: 0;
  }

  .page-faq .faq-item__q {
    gap: 9px;
    padding: 14px 15px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 15px 16px;
  }

  .page-faq .faq-tail {
    padding: 20px 18px;
  }
}

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

  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-index__item,
  .page-faq .faq-item__link {
    transition: none;
  }
}