diff --git a/server.py b/server.py
index c8305a24..e0bc1eee 100644
--- a/server.py
+++ b/server.py
@@ -41,7 +41,7 @@ def _chk_tcp(host, port, timeout=3):
 
 # ── 2026-08-15 温区数据按周期计算 + 缓存（现场温区归因约30秒/请求，缓存后毫秒级）──
 # 键 = period_tag + strategy_research 最新 created_at（数据更新即失效）
-_regime_winrates_cache = {"key": None, "slots": {}}  # slots: {period_tag: data}
+_regime_winrates_cache = {"slots": {}}  # slots: {period_tag: (data_version_key, data)}
 
 
 def _compute_regime_winrates_cached(pt, _approx_univ):
@@ -63,11 +63,12 @@ def _compute_regime_winrates_cached(pt, _approx_univ):
     except Exception as _e:
         print(f"[REGIME_CACHE] key_err: {_e}", flush=True)
         _cache_key = None
-    if _cache_key and _regime_winrates_cache.get("key") == _cache_key \
-            and (pt or "2y") in (_regime_winrates_cache.get("slots") or {}):
-        print(f"[REGIME_CACHE] HIT pt={pt} key={_cache_key} cost={round(_tt.time()-_t0,3)}s", flush=True)
-        return _regime_winrates_cache["slots"][pt or "2y"]
-    print(f"[REGIME_CACHE] MISS pt={pt} key={_cache_key} cached_key={_regime_winrates_cache.get('key')} slots={list((_regime_winrates_cache.get('slots') or {}).keys())}", flush=True)
+    _slots = _regime_winrates_cache.get("slots") or {}
+    _slot = _slots.get(pt or "2y")
+    if _cache_key and _slot and _slot[0] == _cache_key:
+        print(f"[REGIME_CACHE] HIT pt={pt} cost={round(_tt.time()-_t0,3)}s", flush=True)
+        return _slot[1]
+    print(f"[REGIME_CACHE] MISS pt={pt} key={_cache_key} slots={list(_slots.keys())}", flush=True)
 
     _pt_chain = {'1m': '1y', '6m': '1y', '1y': '1y', '2y': '2y', '5y': '5y', '10y': '10y'}
     _pt_use = _pt_chain.get(pt or '2y', '2y')
@@ -173,8 +174,7 @@ def _compute_regime_winrates_cached(pt, _approx_univ):
         pass
     if _cache_key:
         try:
-            _regime_winrates_cache["key"] = _cache_key
-            (_regime_winrates_cache.setdefault("slots", {}))[pt or "2y"] = _regime_winrates
+            (_regime_winrates_cache.setdefault("slots", {}))[pt or "2y"] = (_cache_key, _regime_winrates)
         except Exception:
             pass
     print(f"[REGIME_CACHE] DONE pt={pt} cost={round(_tt.time()-_t0,1)}s strategies={len(_regime_winrates)}", flush=True)