:root{color-scheme:light;--ink:#172033;--navy:#172a46;--blue:#3156d3;--muted:#667085;--line:#e5eaf2;--bg:#f5f7fb;--card:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.65}header{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;padding:42px 20px}header div,main,footer{width:min(880px,calc(100% - 32px));margin:auto}header h1{margin:0 0 8px;font-size:clamp(28px,5vw,42px)}header p{margin:0;color:#e7ecff}nav{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}nav a{background:#eef2ff;color:#2749b8;border-radius:999px;padding:8px 13px;text-decoration:none;font-weight:650;font-size:14px}article{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:clamp(20px,4vw,34px);box-shadow:0 12px 35px #172a4610;margin-bottom:28px}h2{color:var(--navy);font-size:21px;margin:28px 0 6px}h2:first-child{margin-top:0}ul{padding-left:22px}a{color:#244dc4}.notice{background:#fff5df;border-left:4px solid #e59a19;padding:14px 16px;border-radius:10px}.meta{color:var(--muted);font-size:14px}footer{padding:0 0 36px;color:var(--muted);font-size:13px}@media(max-width:520px){header{padding:32px 12px}article{border-radius:14px}nav a{font-size:13px}}