:root{--bg:#ffffff;--ink:#111827;--muted:#6b7280;--ring:#3b82f6;--card:#f9fafb;--border:#e5e7eb;}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Ubuntu,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.container{max-width:1120px;margin:0 auto;padding:0 16px}
.header{position:sticky;top:0;backdrop-filter:saturate(180%) blur(8px);background:rgba(255,255,255,.8);border-bottom:1px solid var(--border);z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:40px;height:40px;border-radius:10px}
.brand .title{font-weight:700}
.brand .tag{font-size:12px;color:var(--muted)}
.nav{display:none;gap:20px;font-size:14px}
.nav a{color:inherit;text-decoration:none}
.toggle{padding:6px 10px;border:1px solid var(--border);border-radius:12px;background:#fff;cursor:pointer}
@media(min-width:768px){.nav{display:flex}}

.hero{padding:64px 0}
.hero-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:900px){.hero-grid{grid-template-columns:1fr 1fr}}
.hero h1{font-size:40px;line-height:1.1;margin:0}
.hero p{margin:8px 0 0;color:var(--muted);font-size:18px}
.cta{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 16px;border-radius:16px;border:1px solid var(--border);text-decoration:none;color:inherit}
.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)}

.card{border:1px solid var(--border);border-radius:20px;padding:16px;background:#fff}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}

.section{padding:56px 0}
.section.alt{background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section h2{margin:0;font-size:28px}
.small{font-size:12px;color:var(--muted)}

.fact{border:1px solid var(--border);border-radius:16px;padding:12px}
.fact .k{font-size:12px;color:var(--muted)}
.fact .v{font-weight:600}

.list{list-style:disc;margin:16px 0 0 20px;color:#374151}
.footer{border-top:1px solid var(--border);padding:24px 0;color:var(--muted);font-size:14px}