body{font:16px/1.5 system-ui,sans-serif;margin:0;background:#f4f4f2;color:#222}
header{background:#2d4a3e;color:#fff;padding:10px 20px;font-size:13px}
main{max-width:760px;margin:20px auto;padding:0 16px}
article{background:#fff;border:1px solid #ddd;border-radius:6px;padding:12px 16px;margin:12px 0}
.ad{width:320px;height:110px;border:1px solid #bbb;background:#fff7e6;padding:6px;margin:12px 0}
.ad small{display:block;font-size:11px;color:#666}