{"schema_version": "o4-1.0", "activity_id": "act_console", "source_prompt": "美国站黑五做一个刮刮卡，三档奖品：50 美元券 100 张、10 美元券 500 张、免邮 2000 张，每人每天 2 次，最多中 1 次，活动 11 月 10 日零点到 12 月 5 日，纽约时间，英语。", "gameplay": "scratch", "region": "US", "locales": ["en"], "default_locale": "en", "time_window": {"start": "2026-11-10T00:00:00-05:00", "end": "2026-12-05T23:59:59-05:00", "timezone": "America/New_York"}, "limits": {"per_user_draws": 2, "per_user_wins": 1, "reset_period": "daily"}, "tiers": [{"prize_id": "T1_COUPON_50", "probability": 0.02, "stock_total": 100, "reward": {"type": "coupon", "value": 50, "currency": "USD"}}, {"prize_id": "T2_COUPON_10", "probability": 0.08, "stock_total": 500, "reward": {"type": "coupon", "value": 10, "currency": "USD"}}, {"prize_id": "T3_FREESHIP", "probability": 0.25, "stock_total": 2000, "reward": {"type": "free_shipping", "value": 1}}], "assumptions": [{"path": "tiers[*].probability", "value": "0.02 / 0.08 / 0.25", "reason": "需求未给各档概率，按 3 档默认阶梯补全，合计 0.35"}]}