.page-faq {
  --faq-line: rgba(140, 151, 184, .18);
  --faq-glass: rgba(22, 32, 74, .55);
  --faq-glass-strong: rgba(22, 32, 74, .84);
  --faq-gap: clamp(38px, 5vw, 68px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-topbar {
  padding-block: 20px 4px;
}

.page-faq .faq-topbar .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-topbar .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(140, 151, 184, .5);
}

.page-faq .faq-topbar .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-topbar .breadcrumb a:hover,
.page-faq .faq-topbar .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: rgba(53, 224, 200, .5);
}

.page-faq .faq-topbar .breadcrumb [aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--faq-line);
  background:
    radial-gradient(1000px 480px at 84% -22%, rgba(53, 224, 200, .17), transparent 62%),
    radial-gradient(660px 400px at 2% 112%, rgba(255, 122, 41, .13), transparent 66%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(233, 238, 248, .035) 0 1px, transparent 1px 4px);
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  padding-block: clamp(24px, 3.4vw, 44px) clamp(40px, 6vw, 76px);
}

.page-faq .faq-hero__copy {
  min-width: 0;
  display: grid;
  align-content: end;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.08;
  font-size: clamp(29px, 5.1vw, 54px);
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 18px;
  margin: 32px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-hero__stats dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  line-height: 1.35;
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  margin: 0;
  align-self: stretch;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 36px;
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 8vw, 104px);
}

.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

/* ---------- 左侧分类锚点 ---------- */
.page-faq .faq-rail {
  padding: 20px 18px;
  border-radius: var(--radius);
  align-self: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

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

.page-faq .faq-toc__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 11px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--muted);
  font-size: 15px;
  text-decoration: none;
  transition: color .16s var(--ease), background .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--paper);
  background: rgba(53, 224, 200, .08);
  border-left-color: var(--cyan);
}

.page-faq .faq-toc__no {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-toc__link:hover .faq-toc__no,
.page-faq .faq-toc__link:focus-visible .faq-toc__no {
  color: var(--green);
}

.page-faq .faq-rail__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 分组头 ---------- */
.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--head-offset) + 20px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 20px;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  text-wrap: balance;
}

.page-faq .faq-group__lede {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 22px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: var(--faq-glass);
  overflow: hidden;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(140, 151, 184, .34);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 224, 200, .36);
  background: var(--faq-glass-strong);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 20px;
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

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

.page-faq .faq-item__no {
  font-size: 12px;
  color: var(--muted);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
}

.page-faq .faq-item__a {
  padding: 0 18px 20px 60px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
  animation: faqReveal .26s var(--ease);
}

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

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

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

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  counter-reset: step;
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps > li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-steps > li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(53, 224, 200, .5);
  box-shadow: inset 0 0 0 3px rgba(53, 224, 200, .07);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-steps strong {
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 橙线提示 ---------- */
.page-faq .faq-note {
  display: grid;
  grid-template-columns: 3px minmax(0, 1fr);
  gap: 14px;
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid rgba(255, 122, 41, .3);
  border-radius: var(--radius-sm);
  background: rgba(255, 122, 41, .09);
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper);
}

.page-faq .faq-note::before {
  content: "";
  border-radius: 999px;
  background: linear-gradient(180deg, var(--orange), rgba(255, 122, 41, .22));
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(140, 151, 184, .28);
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 200, .4);
  padding-bottom: 2px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

/* ---------- 信息清单 ---------- */
.page-faq .faq-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper);
}

.page-faq .faq-checklist li::before {
  content: "";
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid rgba(53, 224, 200, .55);
  border-radius: 4px;
  background: rgba(53, 224, 200, .08);
}

/* ---------- 联系渠道 ---------- */
.page-faq .faq-channels {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-faq .faq-channel {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px 18px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: rgba(22, 32, 74, .6);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-channel:hover {
  border-color: rgba(53, 224, 200, .34);
  transform: translateY(-2px);
}

.page-faq .faq-channel__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-faq .faq-channel h3 {
  margin: 0;
}

.page-faq .faq-channel__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-faq .faq-channel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-hero__copy {
    display: grid;
    align-content: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--head-offset) + 16px);
  }

  .page-faq .faq-item__a {
    max-width: 76ch;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-item__q {
    grid-template-columns: 26px minmax(0, 1fr) 18px;
    gap: 8px;
    padding: 14px;
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 16px 48px;
    font-size: 14.5px;
  }

  .page-faq .faq-steps > li {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-steps > li::before {
    width: 24px;
    height: 24px;
    font-size: 11px;
  }
}

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

  .page-faq .faq-channel:hover {
    transform: none;
  }
}