*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#050810;
  --panel:#0c1422;
  --panel-2:#111d2f;
  --line:#22324d;
  --text:#f4f8ff;
  --muted:#94a8c3;
  --blue:#18a8ff;
  --cyan:#61e7ff;
  --green:#2bea8f;
  --gold:#ffd166;
  --radius:8px;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background:
    linear-gradient(135deg,rgba(24,168,255,.18),transparent 34%),
    radial-gradient(circle at 80% 12%,rgba(43,234,143,.12),transparent 28%),
    var(--ink);
  color:var(--text);
  font-family:"Aptos Display","Microsoft YaHei UI","PingFang SC",sans-serif;
  letter-spacing:0;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 78%);
}
a{color:inherit;text-decoration:none}
.site-header{
  position:sticky;
  top:0;
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:20px clamp(18px,4vw,56px);
  background:rgba(5,8,16,.76);
  border-bottom:1px solid rgba(97,231,255,.16);
  backdrop-filter:blur(16px);
}
.brand img{display:block;width:220px;max-width:52vw;height:auto}
.top-nav{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px}
.top-nav a{padding:9px 12px;border:1px solid transparent;border-radius:var(--radius)}
.top-nav a:hover{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.04)}
.hero{
  min-height:calc(100vh - 82px);
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(320px,480px);
  gap:48px;
  align-items:center;
  padding:56px clamp(18px,6vw,88px) 76px;
}
.eyebrow{
  margin:0 0 14px;
  color:var(--cyan);
  font-size:13px;
  font-weight:800;
  text-transform:uppercase;
}
h1,h2,h3,p{margin-top:0}
h1{
  margin-bottom:18px;
  font-size:clamp(52px,8vw,108px);
  line-height:.92;
  font-weight:900;
}
.lead{
  width:min(680px,100%);
  color:#c5d2e4;
  font-size:clamp(18px,2.1vw,25px);
  line-height:1.65;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.primary-action,.secondary-action,.card-action{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 20px;
  border-radius:var(--radius);
  font-weight:800;
  border:1px solid transparent;
  transition:transform .18s ease,border-color .18s ease,background .18s ease;
}
.primary-action,.card-action{background:linear-gradient(90deg,var(--blue),var(--green));color:#00111f}
.secondary-action{border-color:var(--line);background:rgba(255,255,255,.05);color:var(--text)}
.primary-action:hover,.secondary-action:hover,.card-action:hover{transform:translateY(-2px)}
a[download][aria-disabled="true"]{opacity:.58;cursor:wait}
a[download][aria-disabled="true"]:hover{transform:none}
.hero-actions a[aria-disabled="true"]{opacity:.58;cursor:not-allowed;pointer-events:none}
.signal-panel{
  position:relative;
  min-height:560px;
  padding:24px;
  background:linear-gradient(180deg,rgba(17,29,47,.94),rgba(8,15,27,.94));
  border:1px solid rgba(97,231,255,.2);
  border-radius:var(--radius);
  box-shadow:0 28px 90px rgba(0,0,0,.36);
  overflow:hidden;
}
.signal-panel::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,transparent 0 45%,rgba(97,231,255,.12) 46% 47%,transparent 48% 100%);
}
.panel-top,.status-row,.meter{position:relative;z-index:1}
.panel-top{
  display:flex;
  align-items:center;
  gap:10px;
  color:#dce9ff;
  font-weight:800;
}
.dot{width:10px;height:10px;border-radius:50%;background:var(--green);box-shadow:0 0 18px var(--green)}
.version{margin-left:auto;color:var(--muted);font-weight:700}
.power-ring{
  position:relative;
  z-index:1;
  width:min(320px,72vw);
  aspect-ratio:1;
  margin:74px auto 54px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:radial-gradient(circle,#173c7a 0 36%,#0d1f3e 37% 62%,transparent 63%);
  box-shadow:0 0 64px rgba(24,168,255,.42),inset 0 0 40px rgba(97,231,255,.25);
}
.ring{position:absolute;inset:-18%;border:1px solid rgba(97,231,255,.15);border-radius:50%;animation:pulse 4s ease-in-out infinite}
.r2{inset:-34%;animation-delay:1.3s}
.power-icon{
  width:78px;
  aspect-ratio:1;
  border:9px solid #d9f2ff;
  border-top-color:transparent;
  border-radius:50%;
  position:relative;
  filter:drop-shadow(0 0 14px var(--cyan));
}
.power-icon::before{
  content:"";
  position:absolute;
  left:50%;
  top:-24px;
  width:9px;
  height:48px;
  border-radius:9px;
  background:#d9f2ff;
  transform:translateX(-50%);
}
@keyframes pulse{50%{transform:scale(1.04);border-color:rgba(43,234,143,.26)}}
.status-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(255,255,255,.04);
}
.status-row b,.status-row span{display:block}
.status-row span{margin-top:5px;color:var(--muted)}
.status-row strong{color:var(--green);white-space:nowrap}
.meter{display:flex;gap:7px;align-items:end;justify-content:flex-end;height:42px;margin-top:22px}
.meter span{width:8px;height:var(--h);border-radius:8px;background:var(--green);box-shadow:0 0 16px rgba(43,234,143,.42)}
.section{padding:76px clamp(18px,6vw,88px)}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-title p{margin:0;color:var(--cyan);font-weight:900;text-transform:uppercase;font-size:13px}
.section-title h2,.info-band h2{margin:0;font-size:clamp(34px,4vw,54px)}
.mobile-download-note{display:none}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.download-card{
  min-height:310px;
  padding:24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(17,29,47,.9),rgba(9,16,29,.9));
  display:flex;
  flex-direction:column;
  gap:14px;
}
.download-card.available{border-color:rgba(97,231,255,.24)}
.download-card.pending{opacity:.72}
.platform-mark{
  width:64px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:var(--radius);
  color:#00111f;
  background:var(--cyan);
  font-weight:900;
}
.download-card h3{margin:2px 0 0;font-size:23px}
.download-card p{color:var(--muted);line-height:1.7}
dl{margin:0;display:grid;gap:8px;color:#c8d5e8}
dl div{display:flex;justify-content:space-between;gap:16px;border-top:1px solid rgba(255,255,255,.08);padding-top:8px}
dt{color:var(--muted)}
dd{margin:0;text-align:right}
.card-action{margin-top:auto;width:100%}
.card-action.disabled{background:#1b273b;color:var(--muted);border-color:var(--line);cursor:not-allowed}
.info-band{
  margin:0 clamp(18px,6vw,88px) 58px;
  padding:34px;
  border-radius:var(--radius);
  border:1px solid rgba(43,234,143,.22);
  background:linear-gradient(90deg,rgba(43,234,143,.12),rgba(24,168,255,.08));
  display:grid;
  grid-template-columns:320px 1fr;
  gap:28px;
}
.feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.feature-list div{padding:16px;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);background:rgba(0,0,0,.18)}
.feature-list strong,.feature-list span{display:block}
.feature-list span{margin-top:8px;color:var(--muted);line-height:1.55}
.site-footer{
  display:flex;
  justify-content:space-between;
  gap:18px;
  padding:24px clamp(18px,4vw,56px);
  border-top:1px solid var(--line);
  color:var(--muted);
}
@media (max-width:960px){
  .hero{grid-template-columns:1fr;min-height:auto}
  .signal-panel{min-height:470px}
  .download-grid,.info-band{grid-template-columns:1fr}
}
@media (max-width:640px){
  .site-header{position:static;align-items:flex-start;flex-direction:column;padding-top:18px;padding-bottom:16px}
  .brand img{width:214px;max-width:76vw}
  .top-nav{width:100%;overflow-x:auto}
  .hero{padding:42px 18px 34px;gap:26px}
  .section{padding:44px 18px}
  h1{font-size:clamp(46px,14vw,64px)}
  .lead{font-size:18px;line-height:1.58}
  .hero-actions{margin-top:28px}
  .hero-actions a{width:100%}
  .android-action{order:-1;background:linear-gradient(90deg,var(--blue),var(--green));color:#00111f}
  .windows-action{background:rgba(255,255,255,.05);color:var(--text);border-color:var(--line)}
  .signal-panel{min-height:300px;padding:18px}
  .power-ring{width:min(210px,64vw);margin:38px auto 28px}
  .power-icon{width:58px;border-width:7px}
  .power-icon::before{top:-19px;width:7px;height:38px}
  .status-row{padding:14px}
  .meter{height:30px;margin-top:14px}
  .section-title{display:block}
  .mobile-download-note{
    display:grid;
    gap:6px;
    margin:-4px 0 18px;
    padding:14px 16px;
    border:1px solid rgba(43,234,143,.28);
    border-radius:var(--radius);
    background:rgba(43,234,143,.1);
  }
  .mobile-download-note strong{color:#dfffee}
  .mobile-download-note span{color:var(--muted);line-height:1.55}
  .android-card{order:-1}
  .download-card{min-height:auto}
  .feature-list{grid-template-columns:1fr}
  .site-footer{flex-direction:column}
}