:root{--navy:#052f5c;--blue:#0b5aa6;--yellow:#ffd91a;--ink:#0d3264;--light:#eef9ff}
*{box-sizing:border-box}html{background:var(--navy)}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:#17355b;background:linear-gradient(#062f5d,#0a548e 360px,#eef9ff 360px)}
a{color:#075aa8}header{max-width:980px;margin:0 auto;padding:28px 22px 22px;color:white;display:flex;align-items:center;justify-content:space-between;gap:24px}header a{color:white;text-decoration:none;font-weight:700}.brand{font-size:26px}.nav{display:flex;gap:18px;flex-wrap:wrap}.nav a:hover{text-decoration:underline}.card{max-width:980px;margin:18px auto 40px;background:white;border-radius:22px;padding:clamp(24px,5vw,58px);box-shadow:0 18px 50px rgba(0,0,0,.25);border:3px solid var(--yellow)}h1,h2{color:var(--ink)}h1{font-size:clamp(34px,6vw,56px);margin-top:0}h2{margin-top:34px}.note{background:#eef8ff;border-left:5px solid var(--yellow);padding:15px 18px;border-radius:8px;line-height:1.55}p,li{line-height:1.65}footer{max-width:980px;margin:0 auto;padding:0 22px 34px;color:white;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}footer a{color:white}@media(max-width:600px){header{align-items:flex-start;flex-direction:column}.card{margin:8px 12px 30px;border-radius:16px}}