diff --git a/backend/service.py b/backend/service.py
index a7271b3..4110825 100644
--- a/backend/service.py
+++ b/backend/service.py
@@ -64,64 +64,104 @@ class CrawlerService:
                 ).values(status='processing')
                 conn.execute(upd)
             return {"urls": urls}
+from sqlalchemy import select, insert, update, and_
+from .database import db_instance
+from .utils import normalize_url
+
+class CrawlerService:
+    def __init__(self):
+        self.db = db_instance
 
     def save_results(self, task_id: int, results: list):
-        """通用 API 实现的 UPSERT 逻辑：区分插入、更新、失败"""
-        inserted_urls, updated_urls, failed_urls = [], [], []
+        """
+        保存同一 URL 的多个切片。
+        返回：该 URL 下切片的详细处理统计及页面更新状态。
+        """
+        if not results:
+            return {"msg": "No data provided"}
+
+        # 1. 基础信息提取 (假设 results 里的 source_url 都是一致的)
+        first_item = results[0] if isinstance(results[0], dict) else results[0].__dict__
+        target_url = normalize_url(first_item.get('source_url'))
         
+        # 结果统计容器
+        inserted_chunks = []
+        updated_chunks = []
+        failed_chunks = []
+        is_page_update = False
+
         with self.db.engine.begin() as conn:
+            # 2. 判断该 URL 是否已经有切片存在 (以此判定是否为“页面更新”)
+            check_page_stmt = select(self.db.chunks.c.id).where(
+                and_(self.db.chunks.c.task_id == task_id, self.db.chunks.c.source_url == target_url)
+            ).limit(1)
+            if conn.execute(check_page_stmt).fetchone():
+                is_page_update = True
+
+            # 3. 逐个处理切片
             for res in results:
-                # 适配 Dify 传来的字典或对象
                 data = res if isinstance(res, dict) else res.__dict__
-                clean_url = normalize_url(data.get('source_url'))
                 c_idx = data.get('chunk_index')
 
                 try:
-                    # 1. 检查是否存在该切片
-                    find_q = select(self.db.chunks).where(
+                    # 检查具体某个 index 的切片是否存在
+                    find_chunk_stmt = select(self.db.chunks.c.id).where(
                         and_(
                             self.db.chunks.c.task_id == task_id,
-                            self.db.chunks.c.source_url == clean_url,
+                            self.db.chunks.c.source_url == target_url,
                             self.db.chunks.c.chunk_index == c_idx
                         )
                     )
-                    existing = conn.execute(find_q).fetchone()
+                    existing_chunk = conn.execute(find_chunk_stmt).fetchone()
 
-                    if existing:
-                        # 2. 执行更新 API
-                        upd = update(self.db.chunks).where(self.db.chunks.c.id == existing[0]).values(
+                    if existing_chunk:
+                        # 覆盖更新现有切片
+                        upd_stmt = update(self.db.chunks).where(
+                            self.db.chunks.c.id == existing_chunk[0]
+                        ).values(
                             title=data.get('title'),
                             content=data.get('content'),
                             embedding=data.get('embedding')
                         )
-                        conn.execute(upd)
-                        updated_urls.append(clean_url)
+                        conn.execute(upd_stmt)
+                        updated_chunks.append(c_idx)
                     else:
-                        # 3. 执行插入 API
-                        ins = insert(self.db.chunks).values(
+                        # 插入新切片
+                        ins_stmt = insert(self.db.chunks).values(
                             task_id=task_id,
-                            source_url=clean_url,
+                            source_url=target_url,
                             chunk_index=c_idx,
                             title=data.get('title'),
                             content=data.get('content'),
                             embedding=data.get('embedding')
                         )
-                        conn.execute(ins)
-                        inserted_urls.append(clean_url)
-
-                    # 4. 更新队列状态
-                    conn.execute(update(self.db.queue).where(
-                        and_(self.db.queue.c.task_id == task_id, self.db.queue.c.url == clean_url)
-                    ).values(status='completed'))
+                        conn.execute(ins_stmt)
+                        inserted_chunks.append(c_idx)
 
                 except Exception as e:
-                    print(f"Error: {e}")
-                    failed_urls.append(clean_url)
+                    print(f"Chunk {c_idx} failed: {e}")
+                    failed_chunks.append(c_idx)
+
+            # 4. 最终更新队列状态
+            conn.execute(
+                update(self.db.queue).where(
+                    and_(self.db.queue.c.task_id == task_id, self.db.queue.c.url == target_url)
+                ).values(status='completed')
+            )
 
         return {
-            "inserted_urls": list(set(inserted_urls)),
-            "updated_urls": list(set(updated_urls)),
-            "failed_urls": failed_urls
+            "source_url": target_url,
+            "is_page_update": is_page_update, # 标志：此页面此前是否有过内容
+            "detail": {
+                "inserted_chunk_indexes": inserted_chunks,
+                "updated_chunk_indexes": updated_chunks,
+                "failed_chunk_indexes": failed_chunks
+            },
+            "counts": {
+                "inserted": len(inserted_chunks),
+                "updated": len(updated_chunks),
+                "failed": len(failed_chunks)
+            }
         }
 
 crawler_service = CrawlerService()
\ No newline at end of file