diff --git a/app/modules/imdb/api.py b/app/modules/imdb/api.py
index 85e64aa68..215fa6716 100644
--- a/app/modules/imdb/api.py
+++ b/app/modules/imdb/api.py
@@ -415,27 +415,31 @@ class ImdbApi:
         item = cls._first_title(data)
         if not item:
             return None
-        genres = item.get("titleGenres", {}).get("genres") or []
-        countries = item.get("countriesOfOrigin", {}).get("countries") or []
-        languages = item.get("spokenLanguages", {}).get("spokenLanguages") or []
+        genres = (item.get("titleGenres") or {}).get("genres") or []
+        countries = (item.get("countriesOfOrigin") or {}).get("countries") or []
+        languages = (item.get("spokenLanguages") or {}).get("spokenLanguages") or []
         return cls._parse(
             ImdbTitle,
             {
                 "id": item.get("id"),
-                "type": item.get("titleType", {}).get("id"),
+                "type": (item.get("titleType") or {}).get("id"),
                 "isAdult": item.get("isAdult"),
-                "primaryTitle": item.get("titleText", {}).get("text"),
-                "originalTitle": item.get("originalTitleText", {}).get("text"),
+                "primaryTitle": (item.get("titleText") or {}).get("text"),
+                "originalTitle": (item.get("originalTitleText") or {}).get(
+                    "text"
+                ),
                 "primaryImage": item.get("primaryImage"),
-                "startYear": item.get("releaseYear", {}).get("year"),
-                "runtimeSeconds": item.get("runtime", {}).get("seconds"),
+                "startYear": (item.get("releaseYear") or {}).get("year"),
+                "runtimeSeconds": (item.get("runtime") or {}).get("seconds"),
                 "genres": [
-                    entry.get("genre", {}).get("text")
+                    (entry.get("genre") or {}).get("text")
                     for entry in genres
-                    if entry.get("genre", {}).get("text")
+                    if (entry.get("genre") or {}).get("text")
                 ],
                 "rating": item.get("ratingsSummary"),
-                "plot": item.get("plot", {}).get("plotText", {}).get("plainText"),
+                "plot": ((item.get("plot") or {}).get("plotText") or {}).get(
+                    "plainText"
+                ),
                 "originCountries": [
                     {"code": entry.get("id"), "name": entry.get("text")}
                     for entry in countries
diff --git a/tests/test_imdb_module.py b/tests/test_imdb_module.py
index 0466a29f9..615852710 100644
--- a/tests/test_imdb_module.py
+++ b/tests/test_imdb_module.py
@@ -169,6 +169,39 @@ def test_imdb_graphql_error_is_not_cached() -> None:
     assert api._request.post_json.call_count == 2
 
 
+def test_imdb_title_parser_accepts_null_optional_objects() -> None:
+    """GraphQL 可选对象为 null 时应保留可用详情并归一为空值。"""
+    detail = ImdbApi._parse_title(
+        {
+            "titles": [
+                {
+                    "id": "tt30836097",
+                    "titleType": {"id": "tvSeries"},
+                    "titleText": {"text": "19th Floor"},
+                    "originalTitleText": None,
+                    "releaseYear": None,
+                    "runtime": None,
+                    "titleGenres": None,
+                    "countriesOfOrigin": None,
+                    "spokenLanguages": None,
+                    "plot": None,
+                }
+            ]
+        }
+    )
+
+    assert detail is not None
+    assert detail.id == "tt30836097"
+    assert detail.primary_title == "19th Floor"
+    assert detail.original_title is None
+    assert detail.start_year is None
+    assert detail.runtime_seconds is None
+    assert detail.genres == []
+    assert detail.origin_countries == []
+    assert detail.spoken_languages == []
+    assert detail.plot is None
+
+
 def test_imdb_clear_cache_registers_async_cleanup_in_running_loop() -> None:
     """同步清缓存入口在异步宿主中应登记任务，并保留原同步调用约定。"""