diff --git a/sources.py b/sources.py
index 9ed5a20..44c95be 100644
--- a/sources.py
+++ b/sources.py
@@ -1211,18 +1211,31 @@ def company_reviews(codes, ds: str, *, read_pg=None) -> dict:
             ran_day, age = None, None
         k = _prefix_any(str(r.get("ts_code")))
         brain = sm.get("brain") or {}
-        out[k] = {"period": r.get("period"), "review_version": r.get("review_version"),
+        if age is not None and age < 0:
+            age = 0                                  # 报告运行日晚于数据日（今早刚跑）：算零天，不算负数
+        out[k] = {"period": _clean_str(r.get("period")), "review_version": _clean_str(r.get("review_version")),
                   "overall": sm.get("overall"), "groups": sm.get("groups"), "valuation": sm.get("valuation"),
                   "doubt_hard": bool(sm.get("doubt_hard")), "quality_reasons": sm.get("quality_reasons") or [],
                   "grade_counts": sm.get("grade_counts") or _count_grades(grades), "grade_line": sm.get("grade_line"),
                   "thesis": sm.get("thesis"), "confidence": sm.get("confidence"), "invalidation": sm.get("invalidation"),
                   "antithesis": sm.get("antithesis"), "catalyst": sm.get("catalyst"),
-                  "brain_status": r.get("brain_status") or brain.get("status"), "brain_used": bool(r.get("brain_used")),
+                  "brain_status": _clean_str(r.get("brain_status")) or _clean_str(brain.get("status")),
+                  "brain_used": bool(r.get("brain_used")) if r.get("brain_used") not in (None, "") and r.get("brain_used") == r.get("brain_used") else False,
                   "ran_at": ran_day.isoformat() if ran_day else None, "age_days": age,
                   "report_url": f"{config.AKG_API_BASE}{sm.get('report_path') or '/company/' + str(r.get('ts_code')) + '/review'}"}
     return out
 
 
+def _clean_str(v):
+    """空列经 pandas 会变成 NaN（浮点），JSON 序列化直接失败；统一收成 None。"""
+    if v is None:
+        return None
+    if isinstance(v, float) and v != v:
+        return None
+    s = str(v).strip()
+    return s or None
+
+
 def _count_grades(grades) -> dict:
     out = {"好": 0, "中": 0, "差": 0, "证据不足": 0}
     for v in (grades or {}).values():