.page-faq {
  --faq-sticky-top: calc(var(--topbar) + 34px);
  background: var(--deep);
  color: var(--star);
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.page-faq .faq-group,
.page-faq .faq-item,
.page-faq .faq-pin {
  scroll-margin-top: var(--faq-sticky-top);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 24px 0 0;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 82% at 86% -12%, rgba(122, 92, 255, 0.26), transparent 62%),
    radial-gradient(90% 70% at 4% 8%, rgba(53, 225, 240, 0.12), transparent 60%),
    var(--deep);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 58, 99, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 58, 99, 0.42) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 84%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 84%);
  pointer-events: none;
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  margin-top: 22px;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  font-size: 30px;
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--star);
  max-width: 16em;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 36em;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-glance {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-glance li + li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-glance a {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 3px;
  padding: 14px 6px 14px 2px;
  text-decoration: none;
  color: var(--star);
  border-left: 2px solid transparent;
  transition: background 200ms var(--ease), border-color 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-faq .faq-glance-num {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  text-align: right;
  color: var(--gold);
}

.page-faq .faq-glance-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--star);
  transition: color 200ms var(--ease);
}

.page-faq .faq-glance-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-glance a:hover,
.page-faq .faq-glance a:focus-visible {
  background: rgba(53, 225, 240, 0.07);
  border-left-color: var(--cyan);
  padding-left: 12px;
}

.page-faq .faq-glance a:hover .faq-glance-name,
.page-faq .faq-glance a:focus-visible .faq-glance-name {
  color: var(--cyan);
}

.page-faq .faq-hero-banner {
  margin: 38px 0 0;
  border: 1px solid var(--line);
  border-bottom: 0;
}

.page-faq .faq-hero-banner img,
.page-faq .faq-assist-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 高频问题 ---------- */
.page-faq .faq-pinned {
  padding: 48px 0 44px;
  background: var(--deep);
}

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

.page-faq .faq-pin {
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-pin:hover {
  border-left-color: var(--violet);
  background: rgba(122, 92, 255, 0.05);
}

.page-faq .faq-pin-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-pin-title {
  margin: 8px 0 0;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--star);
}

.page-faq .faq-pin-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 34em;
}

.page-faq .faq-pin-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 240, 0.35);
  padding-bottom: 2px;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-pin-link:hover,
.page-faq .faq-pin-link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 分类索引主体 ---------- */
.page-faq .faq-cats {
  padding: 40px 0 68px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(80% 42% at 102% 0%, rgba(122, 92, 255, 0.15), transparent 64%),
    var(--hull);
}

.page-faq .faq-cats-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-faq .faq-rails-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-rail-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail-list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  color: var(--mist);
  font-size: 14px;
  white-space: nowrap;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--violet);
}

.page-faq .faq-rail-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--star);
  border-color: var(--cyan);
  background: rgba(53, 225, 240, 0.07);
}

.page-faq .faq-rails-foot {
  display: none;
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-rails-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 240, 0.35);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group-head {
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--violet);
}

.page-faq .faq-group:target .faq-group-head {
  border-left-color: var(--cyan);
}

.page-faq .faq-group-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--violet);
}

.page-faq .faq-group-title {
  margin: 6px 0 0;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--star);
}

.page-faq .faq-group-note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 38em;
}

.page-faq .faq-group-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 240, 0.35);
}

.page-faq .faq-group-note a:hover,
.page-faq .faq-group-note a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 问题条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: background 200ms var(--ease);
}

.page-faq .faq-item:target {
  background: rgba(53, 225, 240, 0.08);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .faq-item > summary {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 0 12px;
  padding: 14px 10px 14px 12px;
  cursor: pointer;
  list-style: none;
  transition: background 200ms var(--ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  bottom: 7px;
  width: 2px;
  background: transparent;
  transition: background 200ms var(--ease);
}

.page-faq .faq-item[open] > summary {
  background: rgba(22, 34, 74, 0.62);
}

.page-faq .faq-item[open] > summary::before {
  background: var(--cyan);
}

.page-faq .faq-item > summary:hover {
  background: rgba(22, 34, 74, 0.42);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: right;
  color: var(--mist);
  transition: color 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--gold);
}

.page-faq .faq-q {
  font-size: 16px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--star);
}

.page-faq .faq-caret {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .faq-caret::before,
.page-faq .faq-caret::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.page-faq .faq-caret::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-faq .faq-caret::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

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

.page-faq .faq-a {
  padding: 2px 18px 18px 12px;
  background: rgba(22, 34, 74, 0.45);
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
  max-width: 38em;
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-open 240ms var(--ease);
}

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

/* ---------- 索引协助 ---------- */
.page-faq .faq-assist {
  padding: 56px 0 72px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(53, 225, 240, 0.1), transparent 62%),
    var(--panel);
}

.page-faq .faq-assist-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-faq .faq-assist .section-title {
  margin: 12px 0 0;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--star);
}

.page-faq .faq-assist-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-assist-list li {
  position: relative;
  padding: 11px 0 11px 22px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: var(--star);
}

.page-faq .faq-assist-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

.page-faq .faq-assist .prose {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
  max-width: 36em;
}

.page-faq .faq-contact {
  margin: 26px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-contact dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--star);
  word-break: break-all;
}

.page-faq .faq-assist .btn {
  margin-top: 26px;
}

.page-faq .faq-assist-figure {
  border: 1px solid var(--line);
  border-left-color: rgba(53, 225, 240, 0.5);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero h1 {
    font-size: 38px;
  }

  .page-faq .faq-a {
    padding: 4px 24px 20px 68px;
  }

  .page-faq .faq-item > summary {
    padding: 16px 14px 16px 12px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-pin-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 32px;
  }

  .page-faq .faq-pin {
    padding: 24px 0 12px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding-top: 32px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-hero h1 {
    font-size: 48px;
  }

  .page-faq .faq-glance {
    margin-top: 54px;
  }

  .page-faq .faq-pinned {
    padding: 72px 0 56px;
  }

  .page-faq .faq-assist-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: center;
  }

  .page-faq .faq-assist .section-title {
    font-size: 32px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-cats {
    padding: 56px 0 88px;
  }

  .page-faq .faq-cats-inner {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rails {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-rail-list {
    display: block;
    padding: 0;
    overflow: visible;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-rail-list li {
    border-bottom: 1px solid var(--line-soft);
  }

  .page-faq .faq-rail-link {
    display: grid;
    grid-template-columns: 22px minmax(0, 1fr) 18px;
    align-items: center;
    gap: 10px;
    padding: 13px 10px 13px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    background: rgba(53, 225, 240, 0.06);
    border-left-color: var(--cyan);
    color: var(--star);
  }

  .page-faq .faq-rail-count {
    text-align: right;
  }

  .page-faq .faq-rails-foot {
    display: block;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 64px;
    padding-top: 46px;
  }
}

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

  .page-faq .faq-glance a,
  .page-faq .faq-rail-link,
  .page-faq .faq-pin,
  .page-faq .faq-caret::before,
  .page-faq .faq-caret::after {
    transition: none;
  }
}