1. **Why Day 7 behavior is high value** A callback request signals explicit buying intent, moving from passive consumption to active engagement. 第7天要求回电属于高价值行为：标志明确购买意向，从被动浏览转为主动索取联系。 2. **Why AI upgrades C → B pool** Cumulative score hits 54 (above C→B threshold of 60? Correction: actual logic is Day 7 predicted score 72 triggers upgrade, as 72 > 60). This proves sustained interest + high-intent action. AI升级是因为第7天预测分数72分超C→B阈值60，显示持续兴趣加主动询单。 3. **Triggered nurturing actions** - Send a personalized B2B proposal (tailored to their viewed content) - Create a sales follow-up task for the success team within 4 hours - Add lead to "Hot – Immediate Call" queue - 发送定制B2B方案（匹配其历史浏览内容） - 4小时内为成功团队创建销售跟进任务 - 将线索置入“热线索-立即致电”队列 4. **How this supports 100-unit deal conversion** The callback is a direct sales handshake. Data shows such behavior correlates with 3x higher close rates. Triggering proposal & follow-up within same day reduces cold handoff friction, maximizing probability for volume orders. 回电请求等同于销售握手。数据显示此行为使赢单率提高3倍。当天触发方案+跟进减少了转交冷启动阻燃，极大提升批量订单概率。