:root{--c:#1f4e79;--bg:#f6f8fa;--t:#222}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--t);background:var(--bg);line-height:1.6}
header{background:var(--c);color:#fff;padding:1.2rem 1rem}
header a{color:#fff;text-decoration:none;font-weight:600}
main{max-width:820px;margin:1.5rem auto;background:#fff;padding:1.5rem 2rem;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.08)}
h1,h2,h3{color:var(--c);line-height:1.25}
nav ul{padding-left:1.2rem}
.muted{color:#666;font-size:.9rem}
.en{border-top:1px solid #ddd;margin-top:2rem;padding-top:1rem}
footer{text-align:center;color:#666;font-size:.85rem;padding:1rem}
footer a{color:var(--c)}