:root{--b:#2560ff;--t:#1b1f2a;--m:#5b6475;--bg:#f4f7ff}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--t);background:var(--bg);line-height:1.6}
a{color:var(--b)}header{display:flex;align-items:center;justify-content:space-between;max-width:960px;margin:0 auto;padding:20px 24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;text-decoration:none;color:var(--t)}
.brand span{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#2560ff,#7b5cff);display:inline-block}
nav a{margin-left:16px;text-decoration:none;font-weight:600}
.hero{max-width:960px;margin:0 auto;padding:72px 24px;text-align:center}
.hero h1{font-size:44px;margin:0 0 12px}.hero p{color:var(--m);font-size:19px;max-width:640px;margin:0 auto 28px}
.badge{display:inline-block;background:#fff3d6;color:#9a6200;padding:6px 14px;border-radius:999px;font-weight:600;margin-bottom:20px}
.btn{display:inline-block;background:var(--b);color:#fff;text-decoration:none;padding:12px 22px;border-radius:12px;font-weight:600}
.doc{max-width:820px;margin:0 auto 48px;background:#fff;border-radius:16px;padding:32px;box-shadow:0 8px 30px rgba(20,40,120,.06)}
.doc h1{color:var(--b);margin-top:0}.doc h2{margin-top:28px}.muted{color:var(--m)}
footer{text-align:center;color:var(--m);padding:24px;font-size:14px}