diff --git a/scripts/candidate_filter.py b/scripts/candidate_filter.py
index 76034b7a..e1b8cd56 100644
--- a/scripts/candidate_filter.py
+++ b/scripts/candidate_filter.py
@@ -168,49 +168,56 @@ def stage3_technical(code, name, klines):
 # ── Stage 4: 资金性质分析 ──
 
 def stage4_capital_flow(code, name):
-    """第四关：资金流向
-    东方财富资金流API
-    """
+    """第四关：资金性质（从腾讯实时行情提取外盘/内盘比）"""
     raw = str(code).strip()
     if raw.startswith(("6", "9")):
-        secid = f"1.{raw}"
+        prefix = "sh"
     elif raw.startswith(("0", "3")):
-        secid = f"0.{raw}"
+        prefix = "sz"
     else:
         return False, 0, "非A股"
     
-    url = (f"https://push2his.eastmoney.com/api/qt/stock/fflow/daykline/get?"
-           f"secid={secid}&fields1=f1,f2,f3&fields2=f51,f52,f53,f54,f55&lmt=3")
+    import subprocess as _sp
+    url = f"http://qt.gtimg.cn/q={prefix}{raw}"
     try:
-        import subprocess as _sp
-        curl_cmd = ["curl", "-s", "-H", "Referer: https://quote.eastmoney.com/",
-                    "-H", "User-Agent: Mozilla/5.0", url]
-        r = _sp.run(curl_cmd, capture_output=True, text=True, timeout=15)
-        data = json.loads(r.stdout)
-        klines = data.get("data", {}).get("klines", [])
-        if not klines:
-            return False, 0, "无资金流数据"
+        r = _sp.run(["curl", "-s", url], capture_output=True, timeout=10)
+        text = r.stdout.decode("gbk", errors="ignore")
+        parts = text.split("~")
+        if len(parts) < 40:
+            return False, 0, "数据不足"
+        
+        # 腾讯字段：[7]=外盘(主动买,股),[8]=内盘(主动卖,股)
+        try:
+            outer = int(float(parts[7])) if parts[7] else 0  # 外盘
+            inner = int(float(parts[8])) if parts[8] else 0  # 内盘
+        except:
+            return False, 0, "解析失败"
+        
+        if outer <= 0 or inner <= 0:
+            return False, 0, "无盘口数据"
         
         score = 0
+        ratio = outer / inner if inner > 0 else 1
         checks = []
-        for k in klines:
-            parts = k.split(",")
-            if len(parts) >= 5:
-                # 超大单净流入
-                net_inflow = float(parts[4]) if parts[4] else 0
-                if net_inflow > 0:
-                    score += 1
         
-        if score >= 2:
-            checks.append("多日资金净流入")
-        elif score >= 1:
-            checks.append("有资金流入迹象")
+        if ratio > 1.3:
+            score += 2
+            checks.append(f"外/内={ratio:.2f}")
+        elif ratio > 1.0:
+            score += 1
+            checks.append(f"买稍强{ratio:.2f}")
         else:
-            checks.append("资金流出")
+            checks.append(f"卖稍强{ratio:.2f}")
+        
+        # 绝对量也说明资金活跃度
+        total = outer + inner
+        if total > 50000000:  # >5000万股
+            score += 1
+            checks.append(f"活跃{total/10000:.0f}万")
         
         return score >= 1, score, "; ".join(checks)
     except:
-        return False, 0, "资金流接口失败"
+        return False, 0, "接口失败"
 
 
 # ── Stage 5: 基本面 ──