:root{
  --bg:#070912;
  --bg-2:#0b0f1e;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --text:#eef1f8;
  --muted:#9aa3bd;
  --muted-2:#6f7896;
  --brand:#5b8cff;
  --brand-2:#22d3ee;
  --brand-3:#8b5cf6;
  --gold:#ffd166;
  --radius:16px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.75);
  --maxw:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC","Noto Sans SC",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.02em}
p{margin:0}
code{font-family:ui-monospace,SFMono-Regular,Consolas,"Cascadia Code",monospace}

/* ---------- background ---------- */
#stars{
  position:fixed;inset:0;width:100%;height:100%;
  z-index:0;pointer-events:none;
}
.aurora{
  position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
  filter:blur(70px);opacity:.5;
}
.blob{position:absolute;border-radius:50%;display:block}
.b1{width:640px;height:640px;left:-180px;top:-160px;background:radial-gradient(circle at 30% 30%,#3b5bdb,transparent 65%);animation:float1 22s ease-in-out infinite}
.b2{width:560px;height:560px;right:-160px;top:60px;background:radial-gradient(circle at 60% 40%,#0e7490,transparent 65%);animation:float2 26s ease-in-out infinite}
.b3{width:520px;height:520px;left:35%;top:52%;background:radial-gradient(circle at 50% 50%,#6d28d9,transparent 65%);animation:float3 30s ease-in-out infinite}
@keyframes float1{50%{transform:translate3d(60px,40px,0) scale(1.08)}}
@keyframes float2{50%{transform:translate3d(-50px,60px,0) scale(1.12)}}
@keyframes float3{50%{transform:translate3d(-40px,-50px,0) scale(.94)}}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;gap:22px;
  max-width:var(--maxw);margin:0 auto;padding:14px 22px;
  transition:background .3s,backdrop-filter .3s,border-color .3s,box-shadow .3s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(7,9,18,.72);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom-color:var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em}
.brand img{border-radius:8px}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-links a{
  padding:8px 12px;border-radius:10px;color:var(--muted);
  font-size:14px;transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--text);background:var(--panel)}
.nav-right{display:flex;align-items:center;gap:10px}
.lang{
  background:var(--panel);border:1px solid var(--line);color:var(--muted);
  padding:7px 11px;border-radius:10px;font:inherit;font-size:13px;cursor:pointer;
  transition:.2s;
}
.lang:hover{color:var(--text);border-color:var(--line-2)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04121f;font-weight:700;font-size:14px;
  padding:11px 18px;border-radius:12px;border:1px solid transparent;
  box-shadow:0 10px 30px -12px rgba(34,211,238,.7);
  transition:transform .18s cubic-bezier(.2,.8,.3,1),box-shadow .25s,filter .2s;
  will-change:transform;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 18px 40px -14px rgba(34,211,238,.85);filter:brightness(1.06)}
.btn:active{transform:translateY(0) scale(.985)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:10px}
.btn-lg{padding:15px 26px;font-size:15.5px;border-radius:14px}
.btn-ghost{
  background:var(--panel);color:var(--text);border-color:var(--line-2);
  box-shadow:none;backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:var(--panel-2);box-shadow:none}
.btn-block{width:100%;justify-content:space-between;margin-top:14px}
.btn-block em{font-style:normal;font-weight:600;opacity:.7;font-size:13px}

/* ---------- layout ---------- */
main{position:relative;z-index:1}
.section{max-width:var(--maxw);margin:0 auto;padding:96px 22px}
.section h2{font-size:clamp(26px,3.4vw,38px)}
.sub{color:var(--muted);margin-top:12px;max-width:620px;font-size:15.5px}

/* ---------- hero ---------- */
.hero{
  position:relative;max-width:var(--maxw);margin:0 auto;
  padding:150px 22px 40px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  min-height:min(100vh,860px);
}
.hero-inner{max-width:560px}
.pill{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--panel);border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;font-size:13px;color:var(--muted);
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 0 rgba(34,211,238,.6);animation:pulse 2.2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(34,211,238,0)}100%{box-shadow:0 0 0 0 rgba(34,211,238,0)}}
h1{font-size:clamp(46px,7vw,78px);margin:18px 0 16px;font-weight:800}
.grad{
  background:linear-gradient(105deg,#a5b4ff 0%,#5b8cff 30%,#22d3ee 62%,#8b5cf6 100%);
  background-size:200% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:sheen 9s ease-in-out infinite;
}
@keyframes sheen{50%{background-position:100% 0}}
.lede{color:var(--muted);font-size:16.5px;max-width:520px}
.cta{display:flex;gap:12px;margin:28px 0 16px;flex-wrap:wrap}
.meta{color:var(--muted-2);font-size:13px}

/* ---------- app mockup ---------- */
.mock-wrap{position:relative;perspective:1400px}
.glow{
  position:absolute;inset:8% 6% 0;z-index:-1;border-radius:40px;
  background:radial-gradient(60% 60% at 50% 40%,rgba(91,140,255,.5),transparent 70%);
  filter:blur(48px);
}
.mock{
  border:1px solid var(--line-2);border-radius:18px;overflow:hidden;
  background:linear-gradient(180deg,rgba(20,25,45,.92),rgba(11,15,30,.94));
  box-shadow:var(--shadow);
  transform:rotateX(6deg) rotateY(-9deg);
  transition:transform .5s cubic-bezier(.2,.8,.3,1);
  animation:hover 7s ease-in-out infinite;
}
@keyframes hover{50%{translate:0 -12px}}
.mock-title{
  display:flex;align-items:center;gap:9px;padding:11px 14px;
  border-bottom:1px solid var(--line);font-size:13px;color:var(--muted);
  background:rgba(255,255,255,.03);
}
.mock-dots{margin-left:auto;display:flex;gap:6px}
.mock-dots i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.16)}
.mock-body{display:grid;grid-template-columns:150px 1fr;min-height:288px}
.mock-side{padding:12px 10px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:3px}
.ms{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:9px;color:var(--muted);font-size:13px}
.ms.active{background:linear-gradient(135deg,rgba(91,140,255,.22),rgba(34,211,238,.14));color:var(--text)}
.ms .ic{width:14px;height:14px;border-radius:4px;background:rgba(255,255,255,.14)}
.ms.active .ic{background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.mock-main{padding:18px 20px}
.mock-main h4{font-size:16px;margin-bottom:16px}
.mock-row{display:flex;align-items:center;gap:12px;margin-bottom:13px}
.bar{height:9px;border-radius:6px;background:rgba(255,255,255,.13)}
.bar.dim{background:rgba(255,255,255,.07)}
.w30{width:30%}.w45{width:45%}.w50{width:50%}.w60{width:60%}.w70{width:70%}.w80{width:80%}
.mock-row .bar{flex:0 0 auto}
.sw{width:34px;height:18px;border-radius:999px;background:rgba(255,255,255,.12);margin-left:auto;position:relative;flex:0 0 auto}
.sw::after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#c7cbe0;transition:.3s}
.sw.on{background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.sw.on::after{left:18px;background:#04121f}
.mock-card{
  margin-top:20px;padding:16px;border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.03);display:flex;flex-direction:column;gap:11px;
}

/* ---------- features ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:38px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;position:relative;overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.8,.3,1),border-color .3s,background .3s;
}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .35s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(91,140,255,.16),transparent 60%);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-2);background:var(--panel-2)}
.card:hover::before{opacity:1}
.ic-wrap{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(91,140,255,.22),rgba(34,211,238,.14));
  border:1px solid var(--line-2);margin-bottom:16px;
}
.ic-wrap svg{width:22px;height:22px;fill:var(--brand-2)}
.card h3{font-size:16.5px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:38px}
.stat{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;text-align:center;
  transition:transform .3s,border-color .3s;
}
.stat:hover{transform:translateY(-4px);border-color:var(--line-2)}
.stat b{display:block;font-size:30px;font-weight:800;
  background:linear-gradient(120deg,#a5b4ff,var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:13.5px}

/* ---------- download ---------- */
.dl{display:grid;grid-template-columns:1.25fr .75fr;gap:16px;margin-top:38px}
.dl-card,.dl-side{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
}
.dl-head{display:flex;align-items:center;gap:14px;margin-bottom:6px}
.dl-head svg{fill:var(--brand-2)}
.dl-head b{display:block;font-size:16px}
.dl-head span{color:var(--muted);font-size:13px}
.hash{margin-top:18px;color:var(--muted-2);font-size:12px;letter-spacing:.06em;text-transform:uppercase}
.hashval{
  display:block;margin-top:6px;padding:10px 12px;border-radius:10px;
  background:rgba(0,0,0,.35);border:1px solid var(--line);
  font-size:11.5px;color:#9fb3d9;word-break:break-all;line-height:1.5;
}
.note{margin-top:14px;color:var(--muted-2);font-size:12.5px}
.dl-side h3{font-size:16px;margin-bottom:14px}
.dl-side ul{margin:0;padding-left:18px;color:var(--muted);font-size:14px}
.dl-side li{margin:9px 0}

/* ---------- changelog ---------- */
.log{margin-top:38px;display:flex;flex-direction:column;gap:14px}
.log-item{
  display:grid;grid-template-columns:150px 1fr;gap:22px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;transition:border-color .3s,background .3s;
}
.log-item:hover{border-color:var(--line-2);background:var(--panel-2)}
.log-ver b{
  display:inline-block;font-size:20px;font-weight:800;
  background:linear-gradient(120deg,#a5b4ff,var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.log-ver span{display:block;color:var(--muted-2);font-size:12.5px;margin-top:4px}
.log-body h4{font-size:15px;margin-bottom:10px}
.log-body ul{margin:0;padding-left:18px;color:var(--muted);font-size:14px}
.log-body li{margin:7px 0}

/* ---------- footer ---------- */
.footer{
  position:relative;z-index:1;max-width:var(--maxw);margin:0 auto;
  padding:44px 22px 60px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;color:var(--muted);
}
.footer .brand{color:var(--text);font-size:15px}
.footer p{font-size:13px;max-width:560px}
.footer .small{color:var(--muted-2);font-size:12px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s cubic-bezier(.2,.8,.3,1),transform .7s cubic-bezier(.2,.8,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero{grid-template-columns:1fr;padding-top:126px;min-height:auto}
  .mock{transform:none}
  .grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .dl{grid-template-columns:1fr}
}
@media (max-width:640px){
  .nav-links{display:none}
  .grid{grid-template-columns:1fr}
  .log-item{grid-template-columns:1fr;gap:12px}
  .section{padding:70px 18px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}