:root{
  --bg:#0d1117;
  --bg-2:#111823;
  --bg-3:#161f2c;
  --line:#223044;
  --fg:#e6edf6;
  --fg-dim:#93a4bb;
  --accent:#4ade80;
  --accent-2:#22c55e;
  --accent-dim:#16a34a;
  --radius:14px;
  --wrap:1140px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(13,17,23,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.14em;font-size:15px}
.logo-cube{
  width:22px;height:22px;border-radius:5px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--accent),var(--accent-dim));
  box-shadow:0 0 0 1px rgba(74,222,128,.35),0 6px 16px rgba(34,197,94,.22);
}
.nav{margin-left:auto;display:flex;align-items:center;gap:26px;font-size:14.5px;color:var(--fg-dim)}
.nav a{transition:color .15s}
.nav a:hover{color:var(--fg)}
.nav-toggle{display:none;margin-left:auto;width:42px;height:38px;background:transparent;border:1px solid var(--line);border-radius:10px;cursor:pointer}
.nav-toggle span{display:block;height:2px;margin:4px auto;width:18px;background:var(--fg);border-radius:2px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 22px;border-radius:11px;border:1px solid transparent;
  background:linear-gradient(140deg,var(--accent),var(--accent-2));
  color:#05230f;font-weight:700;font-size:15px;
  transition:transform .15s,box-shadow .15s,opacity .15s;
  box-shadow:0 8px 22px rgba(34,197,94,.2);
}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(34,197,94,.28)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--fg);box-shadow:none}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);box-shadow:none}

/* ---------- hero ---------- */
.hero{
  padding:82px 0 90px;
  background:
    radial-gradient(1000px 420px at 15% -10%,rgba(74,222,128,.13),transparent 60%),
    radial-gradient(760px 380px at 92% 0%,rgba(56,130,246,.10),transparent 62%);
}
.hero-inner{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.eyebrow{
  margin:0 0 14px;font-size:12.5px;font-weight:700;letter-spacing:.17em;
  text-transform:uppercase;color:var(--accent);
}
h1{margin:0 0 20px;font-size:clamp(32px,5vw,50px);line-height:1.13;letter-spacing:-.02em;font-weight:800}
.lead{margin:0 0 30px;font-size:17.5px;color:var(--fg-dim);max-width:52ch}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.hero-facts{list-style:none;display:flex;gap:34px;margin:40px 0 0;padding:0;flex-wrap:wrap}
.hero-facts li{display:flex;flex-direction:column}
.hero-facts strong{font-size:21px;letter-spacing:-.01em}
.hero-facts span{font-size:12.5px;color:var(--fg-dim)}

.hero-art .panel{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(180deg,var(--bg-2),var(--bg-3));
  box-shadow:0 30px 70px rgba(0,0,0,.45);
}
.panel-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#0b1017;border-bottom:1px solid var(--line)}
.dot{width:10px;height:10px;border-radius:50%;display:block}
.dot.r{background:#ff5f57}.dot.y{background:#febc2e}.dot.g{background:#28c840}
.panel-title{margin-left:9px;font-size:12px;color:var(--fg-dim);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.panel-body{
  margin:0;padding:20px 18px;font-size:13.5px;line-height:1.85;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color:#c9d6e6;overflow-x:auto;
}
.panel-body .ok{color:var(--accent)}
.panel-body .dim{color:#63788f}
.panel-body .hl{color:var(--accent);font-weight:700}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{margin:0 0 16px;font-size:clamp(26px,3.4vw,36px);line-height:1.2;letter-spacing:-.015em;font-weight:800}
h3{margin:0 0 9px;font-size:18.5px;font-weight:700}
.section-lead{margin:0 0 42px;font-size:17px;color:var(--fg-dim);max-width:70ch}

.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  padding:26px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg-2);transition:border-color .18s,transform .18s;
}
.section-alt .card{background:var(--bg-3)}
.card:hover{border-color:rgba(74,222,128,.45);transform:translateY(-2px)}
.card p{margin:0;color:var(--fg-dim);font-size:15.3px}

.feature-list{list-style:none;margin:0;padding:0}
.feature-list li{
  position:relative;padding:12px 0 12px 30px;border-bottom:1px solid var(--line);
  color:var(--fg-dim);font-size:15.3px;
}
.feature-list li:last-child{border-bottom:0}
.feature-list li::before{
  content:"";position:absolute;left:2px;top:21px;
  width:9px;height:9px;border-radius:2px;background:var(--accent);opacity:.9;
}
.feature-list strong{color:var(--fg)}

/* ---------- steps ---------- */
.steps{list-style:none;margin:0 0 46px;padding:0;display:grid;gap:20px}
.steps li{
  display:flex;gap:20px;align-items:flex-start;
  padding:22px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-2);
}
.step-num{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(74,222,128,.12);border:1px solid rgba(74,222,128,.35);
  color:var(--accent);font-weight:800;font-size:17px;
}
.steps p{margin:0;color:var(--fg-dim);font-size:15.3px}

.cta{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:30px 32px;border-radius:var(--radius);
  border:1px solid rgba(74,222,128,.3);
  background:linear-gradient(120deg,rgba(74,222,128,.09),rgba(34,197,94,.02));
}
.cta h3{margin:0 0 5px;font-size:21px}
.cta p{margin:0;color:var(--fg-dim)}

/* ---------- faq ---------- */
.faq{display:grid;gap:12px;max-width:840px}
.faq details{
  border:1px solid var(--line);border-radius:12px;background:var(--bg-3);overflow:hidden;
}
.faq summary{
  cursor:pointer;padding:16px 20px;font-weight:600;font-size:15.6px;
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:21px;line-height:1;font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:0;padding:0 20px 18px;color:var(--fg-dim);font-size:15.2px}

/* ---------- footer ---------- */
.site-footer{background:#0a0e14;border-top:1px solid var(--line);padding:52px 0 26px;margin-top:20px}
.footer-inner{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:34px}
.footer-col h4{margin:0 0 13px;font-size:13px;letter-spacing:.13em;text-transform:uppercase;color:var(--fg-dim)}
.footer-col p{margin:11px 0 0;color:var(--fg-dim);font-size:14.5px;max-width:34ch}
.footer-col a{display:block;color:var(--fg-dim);font-size:14.5px;padding:4px 0;transition:color .15s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  color:#63788f;font-size:13.2px;
}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .grid-3{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav{
    position:absolute;top:66px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:#0b1017;border-bottom:1px solid var(--line);
    padding:8px 22px 18px;display:none;
  }
  .nav.open{display:flex}
  .nav a{padding:11px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav .btn{margin-top:14px;width:100%}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.grid-2{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hero{padding:54px 0 60px}
  .section{padding:56px 0}
  .hero-facts{gap:26px}
}