.product-guide{margin:auto;line-height:1.7}.product-guide h1{margin-bottom:10px}.product-guide section{margin:50px 0}.lead{color:#666;font-size:17px}.info-box{background:#f7f9fc;border-left:4px solid #2563eb;border-radius:8px;padding:20px}table{border-collapse:collapse;width:100%;margin-top:20px}th{text-align:left;background:#f4f4f4}th,td{vertical-align:top;border:1px solid #ddd;padding:14px}pre{color:#fff;background:#0f172a;border-radius:8px;padding:18px;overflow:auto}code{font-family:Consolas,monospace}.example-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;display:grid}.card{border:1px solid #ddd;border-radius:10px;padding:20px}.card h3{margin-top:0}.mistake{background:#fafafa;border:1px solid #eee;border-radius:10px;margin-bottom:30px;padding:20px}ol,ul{padding-left:20px}