关键指标
$total_customers,
'new_customers' => $new_customers,
'avg_customer_value' => $avg_customer_value,
'retention_rate' => $retention_data['retention_rate'],
'retained_count' => $retention_data['retained_count'],
'total_previous' => $retention_data['total_previous'],
'conversion_rate' => $conversion_data['conversion_rate'],
'customers_with_orders' => $conversion_data['customers_with_orders']
];
// 渲染关键指标卡片
renderKeyMetricsCard($kpi_data);
?>