diff --git a/services/ollama_service.py b/services/ollama_service.py
index fd64b0d..4830344 100644
--- a/services/ollama_service.py
+++ b/services/ollama_service.py
@@ -505,6 +505,37 @@ class OllamaService:
 
         return self.generate(prompt, system_prompt=system_prompt, temperature=0.5, timeout=120)
 
+    def generate_embedding(self, text: str, model: str = "bge-m3:latest",
+                           host: str = None) -> List[float]:
+        """
+        [ADR-007, Step 3] 呼叫 Ollama API 將文字轉換為向量 Embedding
+
+        2026-04-19 更新（ADR-003 對齊）：
+        embedding 預設走 Hermes 主機 `EMBEDDING_HOST`（env: EMBEDDING_HOST
+        → fallback http://192.168.0.111:11434，內網免認證），
+        避免 self.host 若指向公開 ollama.wooo.work 時回 401。
+        可透過 host 參數 override。
+        """
+        target_host = host or os.getenv("EMBEDDING_HOST", "http://192.168.0.111:11434")
+        try:
+            payload = {"model": model, "prompt": text}
+            response = requests.post(
+                f"{target_host}/api/embeddings",
+                json=payload,
+                timeout=60,
+            )
+            if response.status_code == 200:
+                data = response.json()
+                return data.get("embedding", [])
+            else:
+                logger.error(
+                    f"Ollama Embed Error HTTP {response.status_code} @ {target_host}: {response.text[:200]}"
+                )
+                return []
+        except Exception as e:
+            logger.error(f"Ollama Embed Exception @ {target_host}: {e}")
+            return []
+
 
 # 建立全域服務實例
 ollama_service = OllamaService()