:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#182136;background:#f5f7fc}
*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:900px;margin:auto;padding:24px}
header{display:flex;align-items:center;justify-content:space-between;gap:18px}a{color:#2358c5}nav{display:flex;flex-wrap:wrap;gap:16px}
main{background:white;border:1px solid #e3e8f2;border-radius:18px;box-shadow:0 12px 38px #17223d0d}
h1{font-size:2rem;margin:0 0 16px}h2{font-size:1.2rem;margin:28px 0 8px}p,li{line-height:1.65}
.brand{font-size:1.3rem;font-weight:750;color:#172d63;text-decoration:none}.note{background:#edf3ff;border-radius:10px;padding:12px 16px}
footer{color:#576174;font-size:.9rem}footer a{margin-right:14px}
@media(max-width:620px){header{display:block}nav{margin-top:12px}main{border-radius:0;border-left:0;border-right:0}}