:root{
  --bg:#ffffff;
  --fg:#0b0b0b;
  --muted:#333333;
  --muted2:#666666;
  --accent:#c62828;
  --line:#e5e5e5;
  --soft:#f5f5f5;
  --max:1200px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--fg);
  background:var(--bg);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
a:hover{opacity:.95}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:900}
.brand .dot{width:10px;height:10px;background:var(--accent);display:inline-block}
.nav{display:flex;align-items:center;gap:18px;color:var(--muted2);font-size:14px}
.nav a{color:var(--muted2)}
.nav a:hover{color:var(--fg)}
.lang{display:flex;gap:10px;align-items:center}
.lang a{padding:6px 10px;border:1px solid transparent;border-radius:999px}
.lang a.is-active{border-color:var(--line);color:var(--fg)}
main{display:block}
.section{padding:72px 0;border-bottom:1px solid var(--line)}
.section.no-line{border-bottom:none}
.kicker{color:var(--accent);font-weight:800;letter-spacing:.2px;text-transform:uppercase;font-size:12px;margin-bottom:14px}
.h1{font-size:72px;line-height:1.02;font-weight:900;margin:0 0 14px}
.h2{font-size:44px;line-height:1.1;font-weight:900;margin:0 0 14px}
.h3{font-size:22px;font-weight:800;margin:0 0 8px}
.lead{font-size:20px;color:var(--muted);margin:0 0 26px;max-width:900px}
.rule{width:64px;height:4px;background:var(--accent);margin:0 0 18px}
.buttons{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 22px;
  border-radius:0;
  font-weight:800;
  border:2px solid var(--fg);
}
.btn.primary{background:var(--fg);color:#fff}
.btn.ghost{background:#fff;color:var(--fg)}
.tabs{display:flex;gap:12px;margin:26px 0 0}
.tab{
  padding:12px 18px;border:2px solid var(--fg);
  font-weight:800;border-radius:0;background:#fff;color:var(--fg)
}
.tab.is-active{background:var(--fg);color:#fff}
.grid{display:grid;gap:18px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);padding:22px;background:#fff}
.card .meta{color:var(--accent);font-weight:800;font-size:12px;margin:6px 0 12px}
.card p{margin:0 0 14px;color:var(--muted)}
.examples{background:var(--soft);padding:14px 14px 10px;margin:14px 0 16px}
.examples b{display:block;margin-bottom:8px}
.examples ul{margin:0;padding-left:18px;color:var(--muted)}
.examples li{margin:6px 0}
.examples li::marker{color:var(--accent)}
.card .cta{margin-top:8px}
.cta-black{background:#0b0b0b;color:#fff;border-bottom:none}
.cta-black .lead{color:#cfcfcf}
.cta-black .btn{border-color:transparent}
.cta-black .btn.primary{background:var(--accent)}
.footer{padding:26px 0;color:var(--muted2);font-size:13px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
input,textarea{
  width:100%;
  border:1px solid var(--line);
  padding:12px 12px;
  font-size:16px;
  border-radius:0;
  font-family:inherit;
}
textarea{min-height:140px;resize:vertical}
label{font-weight:800}
small{color:var(--muted2)}
hr.sep{border:none;border-top:1px solid var(--line);margin:26px 0}
@media (max-width: 980px){
  .h1{font-size:44px}
  .h2{font-size:32px}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .nav{display:none}
}