.page-faq{
  --faq-cut:12px;
  --faq-gap:clamp(22px,3.4vw,40px);
  display:block;
  color:var(--silver);
  background:var(--void);
}

.page-faq [id]{ scroll-margin-top:104px; }

.page-faq a{ color:inherit; }

/* ---------- 首屏 ---------- */
.page-faq .faq-sky{
  position:relative;
  padding-block:clamp(26px,4.5vw,52px) clamp(40px,6vw,76px);
  background:
    radial-gradient(120% 92% at 10% -14%, rgba(108,75,214,.48), transparent 62%),
    radial-gradient(78% 70% at 104% -4%, rgba(46,30,92,.92), transparent 56%),
    radial-gradient(60% 60% at 50% 108%, rgba(11,43,51,.7), transparent 70%),
    linear-gradient(180deg, var(--void), var(--stratum));
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}

.page-faq .faq-sky::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(169,176,214,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169,176,214,.07) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.85), transparent 78%);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.85), transparent 78%);
  pointer-events:none;
}

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

.page-faq .faq-sky .breadcrumb{
  margin-bottom:clamp(16px,2.4vw,26px);
  font-size:13px;
  color:var(--dust);
}

.page-faq .faq-sky h1{
  margin:14px 0 0;
  max-width:19em;
  font-family:var(--font-display);
  font-size:clamp(28px,5vw,52px);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.06em;
  color:var(--silver);
}

.page-faq .faq-lede{
  margin:18px 0 0;
  max-width:36em;
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.78;
  color:var(--dust);
}

.page-faq .faq-facts{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  margin:clamp(22px,3vw,32px) 0 0;
  padding:0;
  font-size:13.5px;
  color:var(--dust);
}

.page-faq .faq-facts li{
  display:flex;
  align-items:baseline;
  gap:8px;
  min-width:0;
}

.page-faq .faq-facts .mono{
  font-size:15px;
  letter-spacing:.04em;
  color:var(--pulse);
}

.page-faq .faq-shortcuts{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:clamp(20px,3vw,30px);
}

/* ---------- 主体双列 ---------- */
.page-faq .faq-body{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:var(--faq-gap);
  padding-block:clamp(34px,5vw,60px) clamp(48px,6.5vw,80px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index{
  display:none;
  min-width:0;
  padding:18px 18px 22px;
  background:linear-gradient(180deg, rgba(27,31,75,.72), rgba(16,22,54,.62));
  border:1px solid var(--line-soft);
  clip-path:polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-index-title{
  margin:0 0 6px;
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--pulse);
}

.page-faq .faq-index-group{
  display:grid;
  gap:2px;
  padding-top:14px;
}

.page-faq .faq-index-head{
  display:block;
  margin-bottom:4px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--silver);
  text-decoration:none;
  border-bottom:1px solid var(--line-cool);
  padding-bottom:6px;
  transition:color .2s var(--ease);
}

.page-faq .faq-index-head:hover,
.page-faq .faq-index-head:focus-visible{ color:var(--pulse); }

.page-faq .faq-index-link{
  display:flex;
  gap:8px;
  align-items:baseline;
  padding:5px 0;
  font-size:13.5px;
  line-height:1.5;
  color:var(--dust);
  text-decoration:none;
  overflow-wrap:anywhere;
  transition:color .2s var(--ease);
}

.page-faq .faq-index-link .mono{
  flex:none;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--rail);
  transition:color .2s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible{ color:var(--pulse); }

.page-faq .faq-index-link:hover .mono,
.page-faq .faq-index-link:focus-visible .mono{ color:var(--pulse); }

/* ---------- 右侧问答流 ---------- */
.page-faq .faq-stream{
  display:grid;
  gap:clamp(28px,4vw,48px);
  min-width:0;
}

.page-faq .faq-map{
  margin:0;
  line-height:0;
  overflow:hidden;
  background:var(--indigo);
  border:1px solid var(--line-soft);
  clip-path:polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-map img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  opacity:.88;
}

.page-faq .faq-map--wide img{ aspect-ratio:12 / 7; }

/* 筛选条 */
.page-faq .filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line-soft);
}

.page-faq .filter-bar .chip{
  cursor:pointer;
  font-size:12.5px;
  transition:border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-faq .filter-bar .chip[aria-pressed="true"]{
  color:var(--void);
  border-color:var(--pulse);
  background:var(--pulse);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group{
  display:grid;
  gap:0;
  min-width:0;
}

.page-faq .faq-group + .faq-group{ margin-top:clamp(4px,1vw,10px); }

.page-faq .faq-group-head{
  display:grid;
  gap:6px;
  padding-bottom:12px;
}

.page-faq .faq-group-head h2{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px;
  margin:0;
  font-family:var(--font-display);
  font-size:clamp(19px,2.4vw,25px);
  font-weight:700;
  letter-spacing:.08em;
  color:var(--silver);
}

.page-faq .faq-group-head h2 .mono{
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--pulse);
}

.page-faq .faq-group-note{
  margin:0;
  max-width:36em;
  font-size:14px;
  line-height:1.7;
  color:var(--dust);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item{
  min-width:0;
  border-top:1px solid var(--line-cool);
}

.page-faq .faq-item:last-child{ border-bottom:1px solid var(--line-cool); }

.page-faq .faq-q-wrap{
  margin:0;
  font-size:inherit;
  font-weight:inherit;
}

.page-faq .faq-q{
  display:flex;
  align-items:flex-start;
  gap:14px;
  width:100%;
  padding:15px 4px;
  background:none;
  border:0;
  color:inherit;
  text-align:left;
  cursor:pointer;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  transition:color .2s var(--ease);
}

.page-faq .faq-q:hover{ color:var(--pulse); }
.page-faq .faq-q:focus-visible{ outline:1px solid var(--pulse); outline-offset:2px; }

.page-faq .faq-q-num{
  flex:none;
  padding-top:4px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--pulse);
}

.page-faq .faq-q-text{
  flex:1 1 auto;
  min-width:0;
  font-weight:600;
  overflow-wrap:anywhere;
}

.page-faq .faq-q-dot{
  flex:none;
  width:8px;
  height:8px;
  margin-top:9px;
  border-radius:50%;
  border:1px solid var(--rail);
  background:transparent;
  transition:background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
}

.page-faq .faq-q[aria-expanded="true"]{ color:var(--silver); }

.page-faq .faq-q[aria-expanded="true"] .faq-q-dot{
  background:var(--pulse);
  border-color:var(--pulse);
  box-shadow:0 0 0 4px rgba(53,230,208,.16);
  transform:scale(1.15);
}

/* ---------- 答案面板 ---------- */
.page-faq .faq-a{
  position:relative;
  margin:0 0 18px;
  padding:16px 18px 18px 34px;
  background:linear-gradient(180deg, rgba(27,31,75,.94), rgba(16,22,54,.9));
  clip-path:polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  animation:faq-panel-in 220ms var(--ease) both;
}

.page-faq .faq-a::before{
  content:"";
  position:absolute;
  left:16px;
  top:0;
  bottom:0;
  width:1px;
  background:linear-gradient(180deg, rgba(53,230,208,.8), rgba(108,75,214,.4) 62%, transparent);
}

@keyframes faq-panel-in{
  from{ opacity:0; transform:translateY(-4px); }
  to{ opacity:1; transform:translateY(0); }
}

.page-faq .faq-a p{
  margin:0;
  font-size:15px;
  line-height:1.78;
  color:var(--dust);
}

.page-faq .faq-a p + p{ margin-top:10px; }

.page-faq .faq-a p.faq-a-link{
  margin-top:14px;
  font-size:13.5px;
  color:var(--dust);
}

.page-faq .faq-a p.faq-a-link a{
  color:var(--pulse);
  text-decoration:none;
  border-bottom:1px solid rgba(53,230,208,.4);
  transition:border-color .2s var(--ease);
}

.page-faq .faq-a p.faq-a-link a:hover{ border-color:var(--pulse); }

/* 步骤列表 */
.page-faq .faq-steps{
  list-style:none;
  counter-reset:step;
  display:grid;
  gap:9px;
  margin:0;
  padding:0;
}

.page-faq .faq-steps li{
  position:relative;
  counter-increment:step;
  padding-left:28px;
  font-size:15px;
  line-height:1.75;
  color:var(--dust);
  overflow-wrap:anywhere;
}

.page-faq .faq-steps li::before{
  content:counter(step, decimal-leading-zero);
  position:absolute;
  left:0;
  top:2px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--pulse);
}

/* 排查清单 */
.page-faq .faq-check{
  list-style:none;
  display:grid;
  gap:9px;
  margin:0;
  padding:0;
}

.page-faq .faq-check li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  line-height:1.75;
  color:var(--dust);
  overflow-wrap:anywhere;
}

.page-faq .faq-check li::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  width:9px;
  height:9px;
  border:1px solid var(--rail);
  border-radius:2px;
}

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

/* ---------- 平板 ---------- */
@media (min-width:720px){
  .page-faq .faq-q{ font-size:16.5px; padding:17px 6px; }
  .page-faq .faq-a{ padding:18px 22px 20px 38px; }
  .page-faq .faq-a::before{ left:18px; }
}

/* ---------- 桌面双列 ---------- */
@media (min-width:1000px){
  .page-faq .faq-body{
    grid-template-columns:264px minmax(0,1fr);
    gap:clamp(32px,4vw,64px);
    align-items:start;
  }

  .page-faq .faq-index{
    display:block;
    position:sticky;
    top:96px;
  }

  .page-faq .faq-stream{ gap:clamp(32px,3.6vw,52px); }

  .page-faq .faq-map--wide img{ aspect-ratio:12 / 7; }
}

@media (min-width:1280px){
  .page-faq .faq-body{ grid-template-columns:292px minmax(0,1fr); }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  .page-faq .faq-a{ animation:none; }
  .page-faq .faq-q,
  .page-faq .faq-q-dot,
  .page-faq .faq-index-link,
  .page-faq .filter-bar .chip{ transition:none; }
  .page-faq .faq-q[aria-expanded="true"] .faq-q-dot{ transform:none; }
}