.page-faq {
  --faq-rail: 252px;
  --faq-gap: clamp(22px, 3vw, 44px);
  --faq-anchor-top: 88px;
  background: var(--ink);
  color: var(--white);
}

.page-faq .crumbs {
  padding: 18px 0 6px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 88% at 86% 0%, rgba(228, 255, 76, .12), transparent 62%),
    radial-gradient(90% 70% at 4% 100%, rgba(51, 198, 255, .10), transparent 66%),
    var(--ink-deep);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: .55;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 88%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 88%);
}

.page-faq .faq-hero__layout {
  position: relative;
  display: grid;
  gap: 30px;
  padding: 34px 0 44px;
}

.page-faq .faq-hero__kicker {
  color: var(--lime);
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-size: clamp(28px, 5.4vw, 50px);
  line-height: 1.12;
  letter-spacing: -.01em;
  font-weight: 800;
}

.page-faq .faq-hero__lead {
  max-width: 60ch;
  margin: 0 0 26px;
  color: var(--white);
  opacity: .86;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-deep);
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

/* ---------- 搜索区 ---------- */
.page-faq .faq-search {
  display: grid;
  gap: 12px;
}

.page-faq .faq-search__field {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(3, 21, 15, .74);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-search__field:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(51, 198, 255, .3);
}

.page-faq .faq-search__icon {
  flex: none;
  width: 18px;
  height: 18px;
  color: var(--lime);
}

.page-faq .faq-search__field input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--white);
  font-family: var(--f-body);
  font-size: 15px;
  line-height: 1.6;
  outline: none;
}

.page-faq .faq-search__field input::placeholder {
  color: var(--muted);
}

.page-faq .faq-search__hint {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-kw {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-kw a {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-kw a:hover,
.page-faq .faq-kw a:focus-visible {
  background: rgba(228, 255, 76, .12);
  border-color: var(--lime);
  color: var(--lime);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(30px, 4.4vw, 56px) 0 clamp(36px, 5vw, 64px);
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__cap {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0 0 0 14px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-rail__list a {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 9px 0;
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  transition: color .18s var(--ease);
}

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

.page-faq .faq-rail__num {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--lime);
  letter-spacing: .06em;
}

.page-faq .faq-rail__count {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 1px 8px;
}

.page-faq .faq-rail__note {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 问题分类 ---------- */
.page-faq .faq-section {
  scroll-margin-top: var(--faq-anchor-top);
  margin-bottom: clamp(30px, 4.4vw, 54px);
}

.page-faq .faq-section:last-child {
  margin-bottom: 0;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__num {
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-faq .faq-section__icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(51, 198, 255, .07);
  color: var(--blue);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 800;
  letter-spacing: .01em;
}

.page-faq .faq-metric__fig {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-deep);
}

.page-faq .faq-metric__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(3, 21, 15, .42);
  overflow: hidden;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(228, 255, 76, .35);
}

.page-faq .qa[open] {
  border-color: rgba(228, 255, 76, .6);
  background: rgba(6, 35, 28, .92);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
  transition: background .2s var(--ease);
}

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

.page-faq .qa__q:hover {
  background: rgba(28, 58, 49, .34);
}

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

.page-faq .qa__num {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-faq .qa__text {
  min-width: 0;
}

.page-faq .qa__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--muted);
  transition: transform .2s var(--ease), background .2s var(--ease);
}

.page-faq .qa__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__icon::before {
  background: var(--lime);
}

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

.page-faq .qa__a {
  padding: 0 16px 18px 42px;
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
  background: linear-gradient(180deg, rgba(228, 255, 76, .05), transparent 60%);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--white);
  opacity: .88;
}

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

.page-faq .qa__note {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: rgba(28, 58, 49, .5);
  border: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 12px !important;
  line-height: 1.6 !important;
  color: var(--muted) !important;
  opacity: 1 !important;
}

.page-faq .qa__a a,
.page-faq .faq-rail__note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 198, 255, .4);
}

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

.page-faq .faq-mail {
  font-family: var(--f-mono);
  font-size: .95em;
  color: var(--lime);
  letter-spacing: .01em;
  word-break: break-all;
}

/* ---------- 底部支持条 ---------- */
.page-faq .faq-help {
  border-top: 1px solid var(--line);
  background:
    linear-gradient(100deg, rgba(228, 255, 76, .09), transparent 46%),
    var(--ink-deep);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 22px;
  padding: clamp(32px, 4.6vw, 56px) 0 clamp(34px, 5vw, 60px);
}

.page-faq .faq-help__kicker {
  margin: 0 0 10px;
  color: var(--orange);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--f-display);
  font-size: clamp(21px, 3.4vw, 32px);
  font-weight: 800;
  line-height: 1.24;
}

.page-faq .faq-help__copy p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--white);
  opacity: .84;
}

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

.page-faq .faq-help__meta {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-help__meta dt {
  flex: none;
  width: 72px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .faq-help__meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__layout {
    grid-template-columns: 1fr;
    padding: 46px 0 56px;
  }

  .page-faq .faq-search__field {
    padding: 14px 24px;
  }

  .page-faq .qa__q {
    padding: 17px 22px;
    font-size: 15.5px;
  }

  .page-faq .qa__a {
    padding: 18px 22px 20px 60px;
  }

  .page-faq .faq-help__acts {
    flex-wrap: nowrap;
  }

  .page-faq .faq-help__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 52px;
    padding: 58px 0 66px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: var(--faq-anchor-top);
  }

  .page-faq .faq-metric__fig {
    margin-bottom: 24px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    column-gap: 48px;
  }

  .page-faq .faq-help__meta {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-kw a,
  .page-faq .faq-rail__list a,
  .page-faq .faq-search__field {
    transition: none;
  }
}