*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;line-height:1.5}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

.site-header{position:sticky;top:0;background:#111;color:#fff;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.nav a{color:#fff;text-decoration:none;margin-left:14px;opacity:.9}
.nav a:hover{opacity:1}
.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.2);color:#fff;padding:6px 10px;border-radius:10px}

.section{padding:64px 0}
.hero{background:linear-gradient(135deg,#111,#333);color:#fff;padding:84px 0}
.hero h1{font-size:48px;line-height:1.1;margin-bottom:12px}
.hero p{opacity:.9;margin-bottom:20px}

.btn{display:inline-block;padding:12px 18px;border-radius:999px;text-decoration:none}
.btn-primary{background:#ff6a00;color:#111;font-weight:700}

.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{border:1px solid #eee;border-radius:16px;padding:16px;background:#fff}

.site-footer{background:#111;color:#fff;padding:36px 0;margin-top:40px}
.footer-bottom{opacity:.7;margin-top:18px}

@media (max-width: 900px){
    .cards{grid-template-columns:1fr}
    .nav-toggle{display:inline-block}
    .nav{display:none;flex-direction:column;gap:10px;padding:12px 0}
    .nav.is-open{display:flex}
}