.page-faq{
  --faq-card:#0C2E4A;
  --faq-card-open:#10395B;
  --faq-glow:rgba(40,240,194,.09);
  background:var(--bg);
  color:var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  position:relative;
  overflow:hidden;
  padding-top:calc(var(--header-h) + clamp(24px,4.5vw,54px));
  padding-bottom:clamp(38px,5.5vw,72px);
  background:
    radial-gradient(115% 95% at 86% 6%, rgba(19,75,115,.95) 0%, rgba(4,18,31,0) 62%),
    linear-gradient(180deg,var(--sea-0) 0%, #061A2B 100%);
}
.page-faq .faq-hero::after{
  content:"";
  position:absolute;
  left:-4%;
  right:-4%;
  bottom:0;
  height:12px;
  background:linear-gradient(90deg,var(--lava) 0%,var(--ember) 44%,var(--cyan) 100%);
  transform:rotate(-1.1deg);
  transform-origin:left bottom;
}
.page-faq .faq-hero__inner{
  display:grid;
  gap:clamp(26px,4vw,48px);
}
.page-faq .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:18px;
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.04em;
  color:var(--mist);
}
.page-faq .breadcrumb a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.page-faq .faq-hero .eyebrow{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.page-faq .faq-hero h1{
  margin:0 0 18px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2rem,6vw,3.5rem);
  line-height:1.08;
  letter-spacing:-.04em;
  color:var(--ice);
}
.page-faq .faq-hero__lead{
  margin:0 0 24px;
  max-width:46ch;
  font-size:clamp(1rem,2.2vw,1.125rem);
  line-height:1.75;
  color:var(--mist);
}
.page-faq .faq-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:20px;
}
.page-faq .faq-hero__quick{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0;
  font-size:.8125rem;
  line-height:1.6;
  letter-spacing:.02em;
  color:var(--mist);
}
.page-faq .faq-hero__quick::before{
  content:"";
  flex:0 0 auto;
  width:26px;
  height:3px;
  background:var(--cyan);
}
.page-faq .faq-hero__figure{
  margin:0;
  position:relative;
  border:2px solid var(--line);
  background:var(--sea-2);
  box-shadow:10px 10px 0 var(--hard-shadow);
}
.page-faq .faq-hero__figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-faq .faq-hero__figure figcaption{
  padding:10px 14px;
  border-top:2px solid var(--line);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.04em;
  color:var(--mist);
  background:var(--sea-1);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,3.4vw,44px);
  padding-block:clamp(32px,5vw,64px);
}

.page-faq .faq-index{
  border:2px solid var(--line);
  background:var(--sea-1);
  padding:16px 14px;
}
.page-faq .faq-index__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber);
}
.page-faq .faq-index__list{
  list-style:none;
  margin:0 0 16px;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.page-faq .faq-index__link{
  display:block;
  padding:9px 12px;
  border-left:3px solid var(--line);
  background:rgba(19,75,115,.35);
  color:var(--mist);
  font-size:.9375rem;
  line-height:1.4;
  text-decoration:none;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible{
  color:var(--ice);
  border-left-color:var(--ember);
  background:rgba(19,75,115,.7);
  outline:none;
}
.page-faq .faq-index__link[aria-current]{
  color:var(--ice);
  font-weight:700;
  border-left-color:var(--cyan);
  background:var(--faq-glow);
}
.page-faq .faq-index__readout{
  margin:0;
  padding-top:14px;
  border-top:2px solid var(--line);
  font-size:.8125rem;
  color:var(--mist);
}
.page-faq .faq-index__readout .mono{
  color:var(--cyan);
  letter-spacing:.02em;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group{
  margin-bottom:clamp(32px,5vw,58px);
  scroll-margin-top:calc(var(--header-h) + 24px);
}
.page-faq .faq-group:last-of-type{
  margin-bottom:20px;
}
.page-faq .faq-group__head{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding-bottom:14px;
  margin-bottom:18px;
  border-bottom:2px solid var(--line);
}
.page-faq .faq-group__no{
  font-size:.8125rem;
  letter-spacing:.12em;
  color:var(--cyan);
}
.page-faq .faq-group h2{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.375rem,3.2vw,1.875rem);
  line-height:1.25;
  letter-spacing:-.03em;
  color:var(--ice);
}
.page-faq .faq-group__lead{
  margin:0 0 20px;
  max-width:54ch;
  font-size:1rem;
  line-height:1.7;
  color:var(--ember);
}
.page-faq .faq-group__more{
  margin:16px 0 0;
  font-size:.9375rem;
  line-height:1.7;
  color:var(--mist);
}
.page-faq .faq-group__more a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(40,240,194,.45);
}
.page-faq .faq-group__more a:hover,
.page-faq .faq-group__more a:focus-visible{
  color:var(--ice);
  border-bottom-color:var(--ice);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps{
  list-style:none;
  margin:0 0 22px;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.page-faq .faq-steps li{
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 168px;
  min-width:0;
  padding:12px 14px;
  border:2px solid var(--line);
  background:var(--sea-2);
  font-size:.9375rem;
  line-height:1.4;
  color:var(--ice);
}
.page-faq .faq-steps__no{
  flex:0 0 auto;
  font-size:.8125rem;
  letter-spacing:.08em;
  color:var(--amber);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa{
  border:2px solid var(--line);
  background:var(--faq-card);
  margin-bottom:12px;
  border-radius:var(--radius);
  transition:border-color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease);
}
.page-faq .qa[open]{
  border-color:var(--cyan);
  background:var(--faq-card-open);
  box-shadow:7px 7px 0 var(--hard-shadow);
}
.page-faq .qa__q{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:16px 18px;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.0625rem;
  line-height:1.5;
  color:var(--ice);
}
.page-faq .qa__q::-webkit-details-marker{
  display:none;
}
.page-faq .qa__q::after{
  content:"+";
  margin-left:auto;
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-weight:400;
  font-size:1.375rem;
  line-height:1;
  color:var(--ember);
  transition:color .18s var(--ease);
}
.page-faq .qa[open] .qa__q::after{
  content:"–";
  color:var(--cyan);
}
.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible{
  color:var(--amber);
  outline:none;
}
.page-faq .qa[open] .qa__q:hover{
  color:var(--ice);
}
.page-faq .qa__a{
  margin:0;
  padding:14px 18px 18px;
  border-top:2px solid var(--line);
  font-size:1rem;
  line-height:1.78;
  color:var(--mist);
}
.page-faq .qa__a a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(40,240,194,.45);
}
.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible{
  color:var(--ice);
  border-bottom-color:var(--ice);
}

/* ---------- 大屏入口示意图 ---------- */
.page-faq .faq-figure{
  margin:0 0 20px;
  border:2px solid var(--line);
  background:var(--sea-2);
}
.page-faq .faq-figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-faq .faq-figure figcaption{
  padding:10px 14px;
  border-top:2px solid var(--line);
  background:var(--sea-1);
  font-size:.8125rem;
  line-height:1.6;
  color:var(--mist);
}

/* ---------- 联系支持 ---------- */
.page-faq .support-card{
  border:2px solid var(--line);
  background:linear-gradient(150deg,var(--sea-2) 0%,var(--sea-1) 68%);
  padding:20px 18px;
  box-shadow:8px 8px 0 var(--hard-shadow);
}
.page-faq .support-card__label{
  display:inline-block;
  margin:0 0 16px;
  padding:6px 10px;
  background:var(--faq-glow);
  border-left:3px solid var(--cyan);
  font-size:.8125rem;
  letter-spacing:.06em;
  color:var(--cyan);
}
.page-faq .support-list{
  list-style:none;
  margin:0 0 18px;
  padding:0;
  display:grid;
  gap:10px;
}
.page-faq .support-list li{
  display:grid;
  gap:4px;
  padding-bottom:10px;
  border-bottom:2px solid var(--line);
}
.page-faq .support-list li:last-child{
  padding-bottom:0;
  border-bottom:none;
}
.page-faq .support-list__key{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--amber);
}
.page-faq .support-list__val{
  font-size:1rem;
  line-height:1.6;
  color:var(--ice);
  word-break:break-word;
}
.page-faq .support-list__val.mono{
  font-size:.9375rem;
  letter-spacing:.01em;
}
.page-faq .support-card__note{
  margin:0 0 18px;
  font-size:.9375rem;
  line-height:1.7;
  color:var(--mist);
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-backtop{
  margin:0;
  text-align:right;
}
.page-faq .faq-backtop a{
  display:inline-block;
  padding:10px 14px;
  border:2px solid var(--line);
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.06em;
  color:var(--mist);
  text-decoration:none;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.page-faq .faq-backtop a:hover,
.page-faq .faq-backtop a:focus-visible{
  color:var(--ice);
  border-color:var(--cyan);
  background:var(--faq-glow);
  outline:none;
}

/* ---------- 响应式 ---------- */
@media (min-width:900px){
  .page-faq .faq-hero__inner{
    grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
    align-items:center;
  }
  .page-faq .faq-shell{
    grid-template-columns:272px minmax(0,1fr);
    gap:clamp(32px,3.6vw,52px);
  }
  .page-faq .faq-index{
    position:sticky;
    top:calc(var(--header-h) + 24px);
    align-self:start;
  }
  .page-faq .faq-index__list{
    flex-direction:column;
    flex-wrap:nowrap;
    gap:2px;
  }
  .page-faq .faq-index__link{
    background:transparent;
    border-left-width:3px;
  }
  .page-faq .qa__q{
    padding:18px 22px;
    font-size:1.125rem;
  }
  .page-faq .qa__a{
    padding:16px 22px 22px;
  }
}

@media (min-width:1100px){
  .page-faq .support-card{
    padding:26px 24px;
  }
}

@media (max-width:600px){
  .page-faq .faq-index{
    padding:14px 12px;
  }
  .page-faq .faq-index__link{
    padding:8px 10px;
    font-size:.875rem;
  }
  .page-faq .faq-steps li{
    flex:1 1 100%;
  }
  .page-faq .qa__q{
    font-size:1rem;
    padding:14px 14px;
  }
  .page-faq .qa__a{
    padding:12px 14px 16px;
    font-size:.9375rem;
  }
  .page-faq .support-card{
    box-shadow:5px 5px 0 var(--hard-shadow);
  }
}

@media (prefers-reduced-motion:reduce){
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .faq-index__link,
  .page-faq .faq-backtop a{
    transition:none;
  }
}