.page-faq {
  --faq-pad: 24px;
  --faq-toc-w: 232px;
  background: var(--silver);
  color: var(--ink);
  padding-bottom: 96px;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink-2);
}

.page-faq .faq-crumbs a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease);
}

.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  border-bottom-color: var(--blue);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  margin-top: 20px;
  padding: 62px 0 54px;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(120% 150% at 86% -14%, rgba(127, 163, 255, .38) 0%, rgba(127, 163, 255, 0) 60%),
    linear-gradient(158deg, #0A1733 0%, #12295C 52%, #1C4ED8 100%);
}

.page-faq .faq-hero__trace {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 48%;
  color: var(--circuit);
  opacity: .5;
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 18px;
}

.page-faq .faq-hero__eyebrow {
  color: var(--circuit);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.4vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .84);
}

.page-faq .faq-snapshot {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-snapshot__item {
  padding: 14px 16px;
  border: 1px solid rgba(127, 163, 255, .45);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-faq .faq-snapshot__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--orange);
}

.page-faq .faq-snapshot__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .8);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 40px;
  padding-top: 52px;
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-toc__title {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 40px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  background: var(--mist);
  color: var(--ink);
  border-left-color: var(--blue);
}

.page-faq .faq-toc__num {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--blue);
  letter-spacing: .06em;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--shell-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .faq-group__head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 60px;
  height: 2px;
  background: var(--blue);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--blue);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 3.6vw, 1.7rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__sub {
  grid-column: 2;
  margin: 2px 0 0;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--ink-2);
}

.page-faq .faq-group__body {
  display: grid;
  gap: 10px;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  align-self: start;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--circuit);
}

.page-faq .qa[open] {
  border-color: var(--blue);
  box-shadow: var(--shadow-soft);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-sizing: border-box;
  min-height: 44px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin: 7px 2px 0 auto;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(45deg);
  transition: transform .18s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  transform: rotate(-135deg);
  margin-top: 10px;
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .qa__idx {
  flex: none;
  margin-top: 3px;
  padding: 1px 5px;
  border: 1px solid var(--circuit);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--blue);
}

.page-faq .qa__a {
  padding: 0 16px 16px 16px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-2);
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa__a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--circuit);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  border-bottom-color: var(--blue);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-style: normal;
  color: var(--orange-ink);
}

.page-faq .faq-flag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--amber);
  color: var(--deep);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .02em;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--mist);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--ink-2);
  background: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-foot {
  grid-column: 1 / -1;
  margin-top: 64px;
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
  display: grid;
  gap: 18px;
}

.page-faq .faq-foot__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .78);
  max-width: 62ch;
}

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

.page-faq .faq-foot__links .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-snapshot {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
  }

  .page-faq .faq-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-foot {
    padding: 32px 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 78px 0 66px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    column-gap: 72px;
    align-items: end;
    row-gap: 0;
  }

  .page-faq .faq-hero__eyebrow {
    grid-column: 1;
  }

  .page-faq .faq-hero__title {
    grid-column: 1;
  }

  .page-faq .faq-hero__lead {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
    font-size: 16.5px;
  }

  .page-faq .faq-snapshot {
    grid-column: 1 / -1;
    margin-top: 40px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--shell-h) + 24px);
    align-self: start;
  }

  .page-faq .faq-toc__list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-group__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}