.rf-guide{--bt:#9a7540}.rf-systems{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:26px 0}.rf-systems article{background:#fff;border:1px solid var(--line);border-top:3px solid var(--bt);padding:22px}.rf-systems span{font-size:9px;color:var(--bt);letter-spacing:1.2px}.rf-systems h3{font-size:18px;margin-top:6px}.rf-systems ul{margin-bottom:0;padding-left:18px}.rf-systems li{font-size:12px;margin:6px 0}@media(max-width:850px){.rf-systems{grid-template-columns:1fr}}