{
  "title": "2026-08-25 投放简报",
  "account_label": "示例账户｜广告投放日报",
  "analysis_date": "2026-08-25",
  "retention_mature_date": "2026-08-24",
  "portfolio_kpis": [
    {"metric": "CPI", "actual": "4.20", "target": "≤ 5.00", "verdict": "达标", "basis": "投放数据日；汇总消耗 / 安装"},
    {"metric": "D1次留成本", "actual": "28.00", "target": "≤ 35.00", "verdict": "达标", "basis": "成熟日 cohort；汇总消耗 / 次留人数"},
    {"metric": "D1次留率", "actual": "15.00%", "target": "≥ 14.00%", "verdict": "达标", "basis": "成熟日 cohort；次留人数 / 安装"},
    {"metric": "日消耗", "actual": "420.00", "target": "500.00", "verdict": "未达标", "basis": "缺口 80.00"}
  ],
  "kpi_note": "不同指标使用各自成熟日期；未成熟次留不用于负面判断。",
  "learning_pool": [
    {"rank": "1", "ad": "Creative Alpha", "stage": "第3天", "evidence": "CPI达标；次留样本尚未成熟", "decision": "继续观察至第5天"}
  ],
  "stable_pool": [
    {"rank": "1", "tier": "S-优质", "ad": "Creative Cedar", "evidence": "近7日KPI超额完成且波动小", "decision": "保护存量；作为新变体母版"},
    {"rank": "2", "tier": "B-波动待优化", "ad": "Creative Birch", "evidence": "CPI达标，次留成本波动", "decision": "保持低量并复查3天"}
  ],
  "actions": [
    {"action": "暂停候选", "ad": "Creative Delta", "evidence": "稳定期且连续成熟样本严重不达标", "budget_impact": "释放约30/日"},
    {"action": "新建变体", "ad": "Creative Cedar方向", "evidence": "近7日稳定且素材变量可拆分", "budget_impact": "测试预算20/日"}
  ],
  "action_notes": [
    {"label": "预算影响", "text": "执行止损与新测后仍有消耗缺口；不要为填满目标而强推未验证素材。"},
    {"label": "3 / 5 / 7天", "text": "第3天优胜劣汰，第5天保留前列，第7天再决定是否进入稳定池。"}
  ],
  "good_ads": [
    {"rank": "1", "ad": "Creative Cedar", "data": "消耗252；60安装；9次留；CPI 4.20", "why_good": "样本足、KPI达标且结果不集中", "next_step": "保护原Ad；新建单变量变体"}
  ],
  "data_note": "这是完全匿名的格式示例，不代表任何真实账户、KPI或广告数据。"
}