body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
margin:0;background:#f4f6f9;color:#1f2933;line-height:1.7}
header{background:#0b3c5d;color:#fff;padding:26px 20px}
nav{margin-top:18px;padding-top:12px;border-top:1px solid rgba(255,255,255,0.25)}
nav a{color:#fff;margin-right:18px;text-decoration:none;font-weight:500}
main{max-width:960px;margin:40px auto;padding:50px 40px;background:#fff}
h2{color:#0b3c5d;border-left:4px solid #0b3c5d;padding-left:12px}
img{max-width:100%;height:auto;margin:20px 0}
footer{background:#e5e7eb;text-align:center;padding:20px;font-size:14px}