:root{
  --bg:#0b0f14;
  --card:#0f1620;
  --muted:#9aa4b2;
  --text:#e7edf5;
  --line:#1f2a38;
  --accent:#4da3ff;
  --accent2:#7c5cff;
  --ok:#39d98a;

  --radius:16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --max: 1080px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(900px 500px at 20% 10%, rgba(77,163,255,.12), transparent 60%),
              radial-gradient(900px 500px at 80% 10%, rgba(124,92,255,.10), transparent 60%),
              var(--bg);
  color:var(--text);
}

a{color:inherit;text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:18px 18px}
.header{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  position:sticky;top:0;background:rgba(11,15,20,.72);backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(31,42,56,.6);
  z-index:10;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  background: linear-gradient(135deg, rgba(77,163,255,.25), rgba(124,92,255,.25));
  border:1px solid rgba(77,163,255,.25);
  font-weight:800;
}
.brandName{font-weight:800;letter-spacing:.2px}
.brandTag{font-size:13px;color:var(--muted);margin-top:2px}

.nav{display:flex;align-items:center;gap:10px}
.langBtn{
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color:var(--text);
  padding:10px 12px;
  border-radius: 999px;
  cursor:pointer;
}
.langBtn:hover{border-color: rgba(77,163,255,.35)}

.hero{
  display:grid;
  grid-template-columns: 1.25fr .75fr;
  gap:18px;
  padding-top:26px;
  padding-bottom:8px;
}
.hero h1{font-size:38px;line-height:1.05;margin:0 0 12px}
.subtitle{color:var(--muted);font-size:16px;line-height:1.6;margin:0 0 18px;max-width:58ch}

.ctaRow{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 14px;border-radius: 12px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  font-weight:700;
}
.btn.primary{
  background: linear-gradient(135deg, rgba(77,163,255,.95), rgba(124,92,255,.95));
  border-color: rgba(255,255,255,.14);
}
.btn.ghost:hover{border-color: rgba(77,163,255,.35)}
.btn.primary:hover{filter:brightness(1.05)}

.pillRow{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  font-size:12px;color:var(--text);
  padding:7px 10px;border-radius: 999px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.05);
}

.card{
  background: rgba(15,22,32,.72);
  border:1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding:16px;
}
.cardTitle{font-weight:800;margin-bottom:10px}
.cardList{margin:0;padding-left:18px;color:var(--text)}
.cardList li{margin:8px 0}
.miniNote{color:var(--muted);font-size:13px;line-height:1.5;margin-top:10px}

.section{padding-top:26px;padding-bottom:8px}
.sectionHead h2{margin:0 0 8px;font-size:22px}
.muted{color:var(--muted)}
.small{font-size:13px}

.grid3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:12px;
  margin-top:14px;
}
.grid2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:12px;
  margin-top:14px;
}
.box{
  background: rgba(15,22,32,.55);
  border:1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding:14px;
}
.boxTitle{font-weight:800;margin-bottom:8px}
.boxText{margin:0;color:var(--muted);line-height:1.6}

.steps{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
.step{
  display:flex;gap:12px;align-items:flex-start;
  background: rgba(15,22,32,.55);
  border:1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding:14px;
}
.stepNum{
  width:34px;height:34px;border-radius: 12px;
  display:grid;place-items:center;
  background: rgba(77,163,255,.16);
  border:1px solid rgba(77,163,255,.22);
  font-weight:900;
}
.stepTitle{font-weight:800;margin-bottom:6px}
.stepText{margin:0;color:var(--muted);line-height:1.6}

.checklist{margin:0;padding-left:18px}
.checklist li{margin:8px 0;color:var(--text)}
.checklist li::marker{color:var(--ok)}

.demoCard{
  margin-top:14px;
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:12px;
  background: rgba(15,22,32,.55);
  border:1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding:14px;
}
.demoTitle{font-weight:900;margin-bottom:6px}
.demoText{margin:0;color:var(--muted);line-height:1.6}

.qrPlaceholder{display:grid;place-items:center;height:100%}
.qrBox{
  width:100%;
  min-height:160px;
  border-radius: 14px;
  border:1px dashed rgba(255,255,255,.18);
  background: rgba(255,255,255,.03);
  display:grid;place-items:center;
  padding:12px;
  text-align:center;
}
.qrText{font-weight:800}
.qrHint{color:var(--muted);font-size:12px;margin-top:6px}

.contactGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  margin-top:14px;
}
.footerNote{
  margin-top:14px;
  padding:12px 14px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  color:var(--muted);
}

.footer{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  padding-top:26px;padding-bottom:26px;
  border-top:1px solid rgba(31,42,56,.6);
}

/* Responsive */
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .demoCard{grid-template-columns:1fr}
  .contactGrid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
}