.page-faq{
  --faq-panel: rgba(11, 27, 51, .68);
  --faq-panel-soft: rgba(7, 17, 31, .55);
  padding-bottom: clamp(48px, 8vw, 96px);
  background:
    radial-gradient(900px 520px at 92% -8%, rgba(139, 92, 246, .12), transparent 62%),
    radial-gradient(760px 480px at -6% 30%, rgba(51, 230, 255, .07), transparent 60%);
  overflow-x: clip;
}

.page-faq .breadcrumb{
  margin: 10px 0 20px;
  font-size: 13px;
}
.page-faq .breadcrumb ol{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  color: var(--c-mist);
}
.page-faq .breadcrumb li{
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-faq .breadcrumb li:not(:last-child)::after{
  content: "/";
  color: var(--c-line);
}
.page-faq .breadcrumb a{
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.page-faq .breadcrumb a:hover{
  color: var(--c-cyan);
  border-bottom-color: rgba(51, 230, 255, .4);
}
.page-faq .breadcrumb li[aria-current="page"]{
  color: var(--c-ice);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero{
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(22px, 4.5vw, 52px);
  border: 1px solid var(--c-line);
  background:
    radial-gradient(120% 120% at 92% 0%, rgba(139, 92, 246, .22), transparent 58%),
    radial-gradient(100% 110% at 0% 100%, rgba(51, 230, 255, .14), transparent 56%),
    var(--c-deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}
.page-faq .faq-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(169, 196, 218, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 196, 218, .07) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(72% 76% at 62% 18%, #000, transparent 78%);
  mask-image: radial-gradient(72% 76% at 62% 18%, #000, transparent 78%);
  pointer-events: none;
}
.page-faq .faq-hero-main,
.page-faq .faq-hero-side{
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-eyebrow{
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.page-faq .hero-title{
  margin: 14px 0 0;
  width: fit-content;
  font-family: var(--font-display);
  font-size: clamp(27px, 6vw, 54px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--c-ice);
  transform: skewX(-2.5deg);
  transform-origin: left center;
  text-wrap: balance;
}
.page-faq .faq-lead{
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 1.85;
  color: var(--c-mist);
}
.page-faq .faq-hero-tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .side-label{
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .quick-grid{
  display: grid;
  gap: 10px;
}
.page-faq .quick-card{
  position: relative;
  display: grid;
  gap: 5px;
  padding: 15px 18px;
  border: 1px solid var(--c-line);
  background: var(--faq-panel-soft);
  color: var(--c-ice);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: transform .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.page-faq .quick-card:hover,
.page-faq .quick-card:focus-visible{
  transform: translateY(-2px);
  border-color: rgba(51, 230, 255, .6);
  background: rgba(51, 230, 255, .09);
}
.page-faq .qc-num{
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-lime);
}
.page-faq .qc-title{
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
}
.page-faq .qc-desc{
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--c-mist);
}

/* ---------- 主体：索引 + 问答 ---------- */
.page-faq .faq-body{
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 64px);
}
.page-faq .faq-index{
  min-width: 0;
}
.page-faq .faq-content{
  min-width: 0;
}

.page-faq .index-label{
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-mist);
}
.page-faq .index-list{
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .index-list a{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--c-line);
  color: var(--c-mist);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.page-faq .index-list a:hover,
.page-faq .index-list a:focus-visible{
  color: var(--c-ice);
  border-color: rgba(51, 230, 255, .55);
  background: rgba(51, 230, 255, .08);
}
.page-faq .idx-num{
  color: var(--c-cyan);
  font-size: 11px;
  letter-spacing: .1em;
}
.page-faq .index-help{
  display: none;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec{
  min-width: 0;
}
.page-faq .faq-sec + .faq-sec{
  margin-top: clamp(36px, 6vw, 68px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--c-line);
}
.page-faq .section-head{
  margin-bottom: clamp(16px, 2.4vw, 24px);
}
.page-faq .section-eyebrow{
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.page-faq .section-title{
  position: relative;
  margin: 0;
  padding-left: 16px;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--c-ice);
}
.page-faq .section-title::before{
  content: "";
  position: absolute;
  left: 0;
  top: .2em;
  bottom: .2em;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-violet));
}
.page-faq .section-lead{
  margin: 12px 0 0;
  max-width: 44ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-mist);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure{
  margin: 0 0 clamp(18px, 2.6vw, 26px);
}
.page-faq .faq-figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-line);
  background: var(--c-deep);
}
.page-faq .media-cap{
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 可展开问答 ---------- */
.page-faq .qa-list{
  display: grid;
  gap: 10px;
}
.page-faq .qa{
  border: 1px solid var(--c-line);
  background: var(--faq-panel);
  transition: border-color .16s var(--ease), background .16s var(--ease);
}
.page-faq .qa[open]{
  border-color: rgba(51, 230, 255, .45);
  background: rgba(11, 27, 51, .9);
}
.page-faq .qa summary{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--c-ice);
}
.page-faq .qa summary::-webkit-details-marker{
  display: none;
}
.page-faq .qa summary::after{
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--c-cyan);
}
.page-faq .qa[open] summary::after{
  content: "−";
}
.page-faq .qa summary:hover .qa-q{
  color: var(--c-cyan);
}
.page-faq .qa-num{
  flex: none;
  padding-top: 2px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-lime);
}
.page-faq .qa-q{
  flex: 1;
  min-width: 0;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.65;
  transition: color .16s var(--ease);
}
.page-faq .qa-a{
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-mist);
}
.page-faq .qa-a p{
  margin: 0 0 10px;
}
.page-faq .qa-a p:last-child{
  margin-bottom: 0;
}

/* ---------- 版本对照 ---------- */
.page-faq .ver-grid{
  display: grid;
  gap: 12px;
  margin-bottom: clamp(16px, 2.4vw, 22px);
}
.page-faq .ver-card{
  padding: 18px 18px 16px;
  border: 1px solid var(--c-line);
  background: var(--faq-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}
.page-faq .ver-card--alt{
  border-color: rgba(139, 92, 246, .4);
  background: linear-gradient(158deg, rgba(139, 92, 246, .16), rgba(7, 17, 31, .6));
}
.page-faq .ver-tag{
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-mist);
}
.page-faq .ver-card h3{
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ice);
}
.page-faq .ver-card ul{
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .ver-card li{
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}
.page-faq .ver-card li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 1px;
  background: var(--c-cyan);
}

/* ---------- 尾部 ---------- */
.page-faq .faq-tail{
  display: grid;
  gap: 20px;
  margin-top: clamp(36px, 6vw, 64px);
  padding: clamp(20px, 4vw, 38px);
}
.page-faq .tail-main{
  min-width: 0;
}
.page-faq .faq-tail h2{
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.2vw, 28px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--c-ice);
}
.page-faq .faq-tail p{
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-mist);
}
.page-faq .tail-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.page-faq .tail-links{
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}
.page-faq .tail-links a{
  display: inline-block;
  padding: 10px 0 10px 16px;
  border-left: 1px solid var(--c-line);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-mist);
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.page-faq .tail-links a:hover,
.page-faq .tail-links a:focus-visible{
  color: var(--c-cyan);
  border-left-color: var(--c-cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px){
  .page-faq .quick-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .ver-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .qa summary{
    padding: 16px 20px;
  }
  .page-faq .qa-a{
    padding: 0 20px 18px;
  }
}

@media (min-width: 900px){
  .page-faq .faq-hero{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-faq .faq-tail{
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1024px){
  .page-faq .faq-body{
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 64px);
  }
  .page-faq .faq-index{
    position: sticky;
    top: 32px;
    padding-left: 18px;
    border-left: 1px solid var(--c-line);
  }
  .page-faq .index-list{
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .index-list a{
    border: 0;
    border-bottom: 1px solid transparent;
    padding: 9px 0;
    white-space: normal;
    background: none;
  }
  .page-faq .index-list a:hover,
  .page-faq .index-list a:focus-visible{
    border-bottom-color: var(--c-line);
    background: none;
  }
  .page-faq .index-help{
    display: block;
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px solid var(--c-line);
  }
  .page-faq .index-help p{
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.7;
    color: var(--c-mist);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .quick-card,
  .page-faq .qa,
  .page-faq .qa-q,
  .page-faq .index-list a,
  .page-faq .tail-links a{
    transition: none;
  }
  .page-faq .quick-card:hover{
    transform: none;
  }
}