:root{
  --bg:#0f0a2e;--bg-2:#1a1245;--card:rgba(255,255,255,.06);--card-border:rgba(167,139,250,.18);
  --primary:#a78bfa;--accent:#22d3ee;--text:#f5f3ff;--muted:#c4b5fd;--muted-2:#a5a1cf;
  --btn:linear-gradient(135deg,#22d3ee 0%,#a78bfa 100%);
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--text);
  background:radial-gradient(1200px 800px at 10% -10%,#4c1d95 0%,transparent 60%),
             radial-gradient(1000px 700px at 100% 10%,#5b21b6 0%,transparent 55%),
             linear-gradient(180deg,#0f0a2e 0%,#1a1245 100%);
  min-height:100vh;line-height:1.7;
}
a{color:var(--text);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(15,10,46,.7);border-bottom:1px solid var(--card-border);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:1280px;margin:0 auto;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:40px;height:40px}
.brand-text b{font-size:16px;display:block}
.brand-text span{font-size:12px;color:var(--muted-2)}
.nav-links{display:flex;gap:28px;font-size:14px}
.nav-links a{color:var(--muted);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-right{display:flex;align-items:center;gap:16px}
.lang{font-size:13px;color:var(--muted);padding:6px 12px;border:1px solid var(--card-border);border-radius:999px}
.btn{
  display:inline-block;padding:12px 24px;border-radius:12px;font-weight:600;font-size:14px;
  background:var(--btn);color:#0f0a2e;transition:transform .2s,box-shadow .2s;border:none;cursor:pointer;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(167,139,250,.4)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--card-border)}
.btn-lg{padding:16px 32px;font-size:15px}
@media(max-width:900px){.nav-links{display:none}}

/* Hero */
.hero{padding:60px 0 40px}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.card{
  background:var(--card);border:1px solid var(--card-border);border-radius:24px;padding:40px;
  backdrop-filter:blur(20px);
}
.chip{
  display:inline-block;padding:6px 14px;border-radius:999px;background:rgba(167,139,250,.15);
  border:1px solid var(--card-border);font-size:12px;color:var(--muted);margin-bottom:20px;
}
h1{font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
h2{font-size:32px;font-weight:700;margin-bottom:16px;letter-spacing:-.01em}
h3{font-size:18px;font-weight:600;margin-bottom:10px}
p{color:var(--muted);margin-bottom:16px}
.lead{font-size:16px;color:var(--muted)}
.hero p{font-size:16px}
.hero-actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.mini-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px}
@media(max-width:640px){.mini-cards{grid-template-columns:1fr}}
.mini{background:rgba(255,255,255,.04);border:1px solid var(--card-border);border-radius:12px;padding:16px}
.mini h4{font-size:14px;font-weight:600;margin-bottom:6px}
.mini p{font-size:12px;color:var(--muted-2);margin:0;line-height:1.55}
.hero-visual{display:flex;flex-direction:column;gap:16px}
.preview-box{position:relative;border-radius:20px;overflow:hidden;background:linear-gradient(135deg,#4c1d95,#1e1b4b);padding:20px;flex:1}
.preview-head{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:12px}
.dot{width:8px;height:8px;background:#22d3ee;border-radius:50%;display:inline-block;margin-right:6px;box-shadow:0 0 8px #22d3ee}
.info-block{background:var(--card);border:1px solid var(--card-border);border-radius:16px;padding:20px}
.info-block b{color:#fff}

/* Sections */
section{padding:60px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head p{font-size:15px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}}
.feature{
  background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;
  transition:transform .2s,border-color .2s;
}
.feature:hover{transform:translateY(-4px);border-color:var(--primary)}
.feature .tag{font-size:11px;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px;display:block}
.feature p{font-size:14px;color:var(--muted-2);margin:0}
.step{display:flex;gap:16px;padding:20px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius)}
.step-num{
  flex-shrink:0;width:36px;height:36px;border-radius:50%;
  background:var(--btn);color:#0f0a2e;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.step h3{font-size:16px}
.step p{font-size:13px;color:var(--muted-2);margin:0}

/* FAQ */
.faq-item{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:20px 24px;margin-bottom:12px}
.faq-item h3{font-size:16px;margin-bottom:8px;color:#fff}
.faq-item p{font-size:14px;margin:0}

/* Code */
pre{
  background:#0b0724;border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;
  font-family:"JetBrains Mono",Menlo,monospace;font-size:13px;line-height:1.7;color:#c4b5fd;overflow-x:auto;
}
code{color:#22d3ee}

/* CTA */
.cta{text-align:center;padding:80px 0}
.cta h2{margin-bottom:16px}
.cta .btn{margin-top:24px}

/* Footer */
footer{border-top:1px solid var(--card-border);padding:40px 0;margin-top:40px;text-align:center;color:var(--muted-2);font-size:13px}
footer a{color:var(--muted);margin:0 12px}

/* Platform */
.platform{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;text-align:left}
.platform .badge{display:inline-block;padding:4px 10px;background:rgba(34,211,238,.12);color:var(--accent);border-radius:999px;font-size:11px;margin-bottom:12px}
.platform h3{font-size:20px}
.platform .foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--card-border);font-size:12px;color:var(--muted-2)}