Changes

application/common/service/LLMService.php

@@ -709,13 +709,27 @@ PROMPT;
     }
 
     /**
-     * 将模型输出的 confidence 吸附到固定档位，并与 is_match 规则对齐
+     * 与 buildReferenceCheckSystemPrompt3 一致的 confidence 档位
+     */
+    private function getReferenceCheckConfidenceBands($isMatch)
+    {
+        return $isMatch
+            ? [0.65, 0.78, 0.85, 0.92, 0.98]
+            : [0.15, 0.25, 0.35, 0.45];
+    }
+
+    /**
+     * 将模型输出的 confidence 吸附到合法档位（如 0.95 → 0.92，0.75 → 0.78）
      */
     private function snapReferenceCheckConfidence($confidence, $isMatch)
     {
-        $matchBands = [0.75, 0.85, 0.95];
-        $mismatchBands = [0.15, 0.25, 0.35];
-        $bands = $isMatch ? $matchBands : $mismatchBands;
+        $bands = $this->getReferenceCheckConfidenceBands($isMatch);
+
+        foreach ($bands as $band) {
+            if (abs($confidence - $band) < 0.001) {
+                return $band;
+            }
+        }
 
         $nearest = $bands[0];
         $minDiff = abs($confidence - $nearest);
@@ -726,6 +740,7 @@ PROMPT;
                 $nearest = $band;
             }
         }
+
         return $nearest;
     }