body{margin:0;background:#f2f5f6;color:#18303b;font:17px/1.65 system-ui,sans-serif}main{max-width:790px;margin:40px auto;padding:36px;background:white;border:1px solid #d9e3e6;border-radius:14px}nav{display:flex;flex-wrap:wrap;gap:20px}a{color:#075c65}h1{font-size:2rem;line-height:1.2}h2{font-size:1.2rem;margin-top:30px}.tag,footer{color:#52666c;font-size:.9rem}.notice{background:#edf6f5;border-left:4px solid #14736f;padding:14px 18px}footer{border-top:1px solid #d9e3e6;margin-top:30px;padding-top:18px}@media(max-width:650px){main{margin:12px;padding:22px}}