:root{
  --bg:#f7f5ef;
  --paper:#fffdf8;
  --ink:#151922;
  --muted:#5a6472;
  --line:#ded8cc;
  --blue:#153e75;
  --blue2:#0f2f5e;
  --accent:#b57b22;
  --accent2:#e4b15e;
  --green:#2e6f54;
  --card:#ffffff;
  --shadow:0 18px 45px rgba(21,25,34,.08);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.55;
}
a{color:inherit;text-decoration:none}
.container{width:min(1160px, calc(100% - 40px)); margin:0 auto}
.topbar{
  position:sticky; top:0; z-index:20;
  background:rgba(247,245,239,.92);
  backdrop-filter: blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{height:74px; display:flex; align-items:center; justify-content:space-between; gap:28px}
.logo{display:flex; align-items:center}
.logo-img{width:52px;height:52px;object-fit:contain;display:block}
.nav-links{display:flex; align-items:center; gap:22px; font-size:14px; color:var(--muted)}
.nav-links a:hover{color:var(--blue)}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:999px; padding:12px 18px; font-weight:700; font-size:14px;
  background:var(--blue); color:white; border:1px solid var(--blue);
  box-shadow:0 8px 18px rgba(21,62,117,.16);
}
.btn.secondary{background:transparent;color:var(--blue);box-shadow:none}
.btn.gold{background:var(--accent);border-color:var(--accent);color:white}
.hero{
  padding:84px 0 62px;
  background:
    radial-gradient(circle at 80% 10%, rgba(181,123,34,.20), transparent 26%),
    radial-gradient(circle at 20% 30%, rgba(21,62,117,.12), transparent 30%);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--blue);font-weight:800;text-transform:uppercase;font-size:12px;letter-spacing:.13em;
  background:#e9eef5;border:1px solid #d7e0ea;border-radius:999px;padding:7px 12px;margin-bottom:18px
}
h1{font-size:56px;line-height:1.02;margin:0 0 20px;letter-spacing:-.045em}
h2{font-size:38px;line-height:1.12;margin:0 0 14px;letter-spacing:-.032em}
h3{font-size:22px;margin:0 0 8px;letter-spacing:-.018em}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:19px;color:#3e4652;max-width:720px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.signal-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:36px}
.signal{
  border:1px solid var(--line);background:rgba(255,253,248,.75);border-radius:18px;padding:14px;
}
.signal strong{display:block;color:var(--ink);font-size:18px}
.signal span{font-size:13px;color:var(--muted)}
.platform-card{
  background:linear-gradient(160deg,#ffffff,#f5f1e8);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow); padding:26px;
}
.diagram{
  margin-top:16px;border-radius:20px;border:1px solid var(--line);background:#fbfaf6;padding:18px;
}
.stack-layer{
  padding:14px 16px;border-radius:16px;background:white;border:1px solid var(--line);
  margin-bottom:10px;display:flex;justify-content:space-between;gap:14px;align-items:center
}
.stack-layer:last-child{margin-bottom:0}
.stack-layer b{color:var(--blue)}
.stack-layer small{color:var(--muted)}
.section{padding:72px 0}
.section.tight{padding:52px 0}
.section.white{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:32px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:0 12px 30px rgba(21,25,34,.05)
}
.card .icon{
  width:42px;height:42px;border-radius:14px;background:#e9eef5;color:var(--blue);
  display:grid;place-items:center;font-weight:900;margin-bottom:14px
}
.card .role-icon{
  width:48px;height:48px;border-radius:16px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.52);
}
.role-icon svg{
  width:28px;height:28px;display:block;
  fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round
}
.motor-icon{background:#e5eef8;color:var(--blue)}
.controller-icon{background:#f5e6cc;color:var(--accent)}
.system-icon{background:#e5f0ea;color:var(--green)}
.card.gold .icon{background:#f5e6cc;color:var(--accent)}
.card.green .icon{background:#e5f0ea;color:var(--green)}
.mini-list{padding:0;margin:14px 0 0;list-style:none}
.mini-list li{padding:8px 0;border-top:1px solid #eee8de;color:var(--muted)}
.table{
  width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border-radius:18px;border:1px solid var(--line);
  background:white
}
.table th{background:var(--blue);color:white;text-align:left;padding:14px;font-size:14px}
.table td{padding:14px;border-top:1px solid var(--line);color:var(--muted);vertical-align:top}
.table td:first-child{font-weight:700;color:var(--ink)}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.compare .bad{border-left:5px solid #9c4a3f}
.compare .good{border-left:5px solid var(--green)}
.badge{
  display:inline-block;background:#edf2f6;color:var(--blue);border:1px solid #d8e2ec;
  border-radius:999px;padding:6px 10px;font-size:12px;font-weight:800;margin:4px 6px 4px 0
}
.cta{
  border-radius:28px;padding:34px;background:linear-gradient(135deg,var(--blue),#0a2345);
  color:white;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta p{color:#d7e2ee}.cta h2{color:white}
.footer{padding:36px 0;color:#7b8390;border-top:1px solid var(--line)}
.footer-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-logo{width:44px;height:44px;object-fit:contain;display:block}
.page-hero{padding:58px 0 42px;background:linear-gradient(180deg,#fbfaf6,var(--bg));border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:12px}
.timeline{display:grid;gap:14px}
.step{display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:start}
.num{
  width:48px;height:48px;border-radius:16px;background:var(--blue);color:white;display:grid;place-items:center;font-weight:900
}
.notice{
  background:#fff6e6;border:1px solid #ead4ab;border-radius:20px;padding:18px;color:#5b461d
}
.notice p{color:#6d562c}
.form{
  display:grid;gap:12px
}
input, textarea, select{
  width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:white;font:inherit;color:var(--ink)
}
textarea{min-height:128px}
@media(max-width:900px){
  .hero-grid,.grid-3,.grid-2,.compare{grid-template-columns:1fr}
  h1{font-size:42px}
  .nav-links{display:none}
  .signal-row{grid-template-columns:1fr}
  .cta{display:block}
}