diff --git a/docutranslate/app.py b/docutranslate/app.py
index 3719ce2..104fc82 100644
--- a/docutranslate/app.py
+++ b/docutranslate/app.py
@@ -9,7 +9,7 @@ import time
 import uuid
 from contextlib import asynccontextmanager, closing
 from pathlib import Path
-from typing import List, Dict, Any, Optional, Literal, Union, Annotated
+from typing import List, Dict, Any, Optional, Literal, Union, Annotated, TYPE_CHECKING
 from urllib.parse import quote
 
 import httpx
@@ -20,12 +20,14 @@ from fastapi.responses import HTMLResponse, JSONResponse, StreamingResponse, Fil
 from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel, Field
 
+from docutranslate.global_values.conditional_import import DOCLING_FLAG
 # --- 核心代码重构后的新 Imports ---
 from docutranslate.manager.base_manager import BaseManager
 from docutranslate.manager.md_based_manager import MarkdownBasedManager
 from docutranslate.manager.txt_manager import TXTManager
 from docutranslate.manager.interfaces import HTMLExportable, MDFormatsExportable, TXTExportable
-from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
+if DOCLING_FLAG or TYPE_CHECKING:
+    from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig
 from docutranslate.exporter.md2x.md2html_exporter import MD2HTMLExportConfig
 from docutranslate.exporter.txt2x.txt2html_exporter import TXT2HTMLExportConfig
@@ -451,9 +453,10 @@ def _cancel_translation_logic(task_id: str):
     description="""
 接收一个包含文件内容（Base64编码）和工作流参数的JSON请求，启动一个后台翻译任务。
 
-- **工作流选择**: 请求体中的 `payload.workflow_type` 字段决定了本次任务的类型（如 `markdown` 或 `text`）。
+- **工作流选择**: 请求体中的 `payload.workflow_type` 字段决定了本次任务的类型（如 `markdown_based` 或 `txt`）。
 - **动态参数**: 根据所选工作流，API需要不同的参数集。请参考下面的Schema或示例。
 - **异步处理**: 此端点会立即返回任务ID，客户端需轮询状态接口获取进度。
+
 """,
     responses={
         200: {
diff --git a/docutranslate/converter/interfaces.py b/docutranslate/converter/interfaces.py
index 5e975b6..54235a2 100644
--- a/docutranslate/converter/interfaces.py
+++ b/docutranslate/converter/interfaces.py
@@ -1,9 +1,8 @@
-from typing import Protocol, runtime_checkable
+from typing import Protocol
 
 from docutranslate.ir.document import Document
 
 
-@runtime_checkable
 class Converter(Protocol):
     def convert(self, document: Document) -> Document:
         ...
diff --git a/docutranslate/converter/x2md/interfaces.py b/docutranslate/converter/x2md/interfaces.py
index dc081bb..7f754bb 100644
--- a/docutranslate/converter/x2md/interfaces.py
+++ b/docutranslate/converter/x2md/interfaces.py
@@ -1,5 +1,3 @@
-from typing import runtime_checkable
-
 from typing import Protocol
 from docutranslate.converter.interfaces import Converter
 from docutranslate.ir.document import Document
@@ -7,7 +5,6 @@ from docutranslate.ir.markdown_document import MarkdownDocument
 
 
 
-@runtime_checkable
 class X2MarkdownConverter(Converter,Protocol):
     """
     负责将其它格式的文件转换为markdown
diff --git a/docutranslate/exporter/interfaces.py b/docutranslate/exporter/interfaces.py
index 1f3c1e2..3854493 100644
--- a/docutranslate/exporter/interfaces.py
+++ b/docutranslate/exporter/interfaces.py
@@ -1,4 +1,4 @@
-from typing import Protocol, runtime_checkable, TypeVar, Any, Self
+from typing import Protocol, TypeVar, Any, Self
 
 from docutranslate.exporter.export_config import ExportConfig
 from docutranslate.ir.document import Document
@@ -6,7 +6,6 @@ from docutranslate.ir.document import Document
 D_in = TypeVar('D_in', bound=Document)
 
 
-@runtime_checkable
 class Exporter(Protocol[D_in]):
     @classmethod
     def from_config(cls, export_config: ExportConfig | None = None) -> Self:
diff --git a/docutranslate/exporter/md2x/md2md_exporter.py b/docutranslate/exporter/md2x/md2md_exporter.py
index 22ce53f..e03730c 100644
--- a/docutranslate/exporter/md2x/md2md_exporter.py
+++ b/docutranslate/exporter/md2x/md2md_exporter.py
@@ -1,10 +1,8 @@
 from dataclasses import dataclass
-from typing import runtime_checkable
 
 from docutranslate.exporter.export_config import ExportConfig
 from docutranslate.exporter.md2x.interfaces import MDExporter
 from docutranslate.ir.markdown_document import MarkdownDocument,Document
-from docutranslate.utils.markdown_utils import unembed_base64_images_to_zip
 
 
 @dataclass
diff --git a/docutranslate/exporter/md2x/types.py b/docutranslate/exporter/md2x/types.py
index 623e903..656f0c2 100644
--- a/docutranslate/exporter/md2x/types.py
+++ b/docutranslate/exporter/md2x/types.py
@@ -1,7 +1,14 @@
-from typing import Literal
+from typing import Literal, TYPE_CHECKING
 
-from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig
+from docutranslate.global_values.conditional_import import DOCLING_FLAG
+
+if DOCLING_FLAG or TYPE_CHECKING:
+    from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
 
 convert_engin_type = Literal["mineru", "docling"]
-x2md_convert_config_type = ConverterDoclingConfig | ConverterMineruConfig
+
+if DOCLING_FLAG or TYPE_CHECKING:
+    x2md_convert_config_type = ConverterDoclingConfig | ConverterMineruConfig
+else:
+    x2md_convert_config_type = ConverterMineruConfig
diff --git a/docutranslate/global_values/conditional_import.py b/docutranslate/global_values/conditional_import.py
index 02a4f2a..1ef31f5 100644
--- a/docutranslate/global_values/conditional_import.py
+++ b/docutranslate/global_values/conditional_import.py
@@ -16,4 +16,4 @@ def conditional_import(packagename,alias=None):
         available_packages[packagename]=False
         return False
 
-conditional_import("docling")
+DOCLING_FLAG=conditional_import("docling")
diff --git a/docutranslate/manager/interfaces.py b/docutranslate/manager/interfaces.py
index abaeb58..996d03d 100644
--- a/docutranslate/manager/interfaces.py
+++ b/docutranslate/manager/interfaces.py
@@ -1,11 +1,10 @@
 from pathlib import Path
-from typing import Protocol, runtime_checkable, Self, TypeVar
+from typing import Protocol, Self, TypeVar, runtime_checkable
 
 from docutranslate.exporter.export_config import ExportConfig
 
 T = TypeVar("T", bound=ExportConfig)
 
-
 @runtime_checkable
 class HTMLExportable(Protocol[T]):
     def export_to_html(self, export_config: T | None = None) -> str:
@@ -14,7 +13,6 @@ class HTMLExportable(Protocol[T]):
     def save_as_html(self, name: str, output_dir: Path | str, export_config: T | None = None) -> Self:
         ...
 
-
 @runtime_checkable
 class MDExportable(Protocol[T]):
 
@@ -24,7 +22,6 @@ class MDExportable(Protocol[T]):
     def save_as_markdown(self, name: str, output_dir: Path | str, export_config: T | None = None) -> Self:
         ...
 
-
 @runtime_checkable
 class MDZIPExportable(Protocol[T]):
 
@@ -34,12 +31,10 @@ class MDZIPExportable(Protocol[T]):
     def save_as_markdown_zip(self, name: str, output_dir: Path | str, export_config: T | None = None) -> Self:
         ...
 
-
 @runtime_checkable
 class MDFormatsExportable(MDZIPExportable[T], MDExportable[T], Protocol):
     ...
 
-
 @runtime_checkable
 class TXTExportable(Protocol[T]):
     def export_to_txt(self) -> str:
diff --git a/docutranslate/manager/md_based_manager.py b/docutranslate/manager/md_based_manager.py
index 334b9a6..0f77f4a 100644
--- a/docutranslate/manager/md_based_manager.py
+++ b/docutranslate/manager/md_based_manager.py
@@ -1,9 +1,12 @@
 import asyncio
 from pathlib import Path
-from typing import Self, Literal, overload
+from typing import Self, Literal, overload, TYPE_CHECKING
 
 from docutranslate.cacher import md_based_convert_cacher
-from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig, ConverterDocling
+from docutranslate.global_values.conditional_import import DOCLING_FLAG
+
+if DOCLING_FLAG or TYPE_CHECKING:
+    from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig, ConverterDocling
 from docutranslate.converter.x2md.converter_identity import ConverterIdentity
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig, ConverterMineru
 from docutranslate.converter.x2md.interfaces import X2MarkdownConverter
@@ -19,10 +22,16 @@ from docutranslate.translater.md_translator import MDTranslateConfig, MDTranslat
 class MarkdownBasedManager(BaseManager, HTMLExportable, MDFormatsExportable):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self._converter_factory: dict[str:tuple[X2MarkdownConverter, x2md_convert_config_type]] = {
-            "mineru": (ConverterMineru, ConverterMineruConfig),
-            "docling": (ConverterDocling, ConverterDoclingConfig),
-        }
+
+        if DOCLING_FLAG or TYPE_CHECKING:
+            self._converter_factory: dict[str:tuple[X2MarkdownConverter, x2md_convert_config_type]] = {
+                "mineru": (ConverterMineru, ConverterMineruConfig),
+                "docling": (ConverterDocling, ConverterDoclingConfig)
+            }
+        else:
+            self._converter_factory: dict[str:tuple[X2MarkdownConverter, x2md_convert_config_type]] = {
+                "mineru": (ConverterMineru, ConverterMineruConfig),
+            }
 
     def _get_document_md(self, convert_engin: convert_engin_type | None,
                          convert_config: x2md_convert_config_type | None):
@@ -57,7 +66,7 @@ class MarkdownBasedManager(BaseManager, HTMLExportable, MDFormatsExportable):
 
     @overload
     def translate(self, convert_engin: Literal["docling"],
-                  convert_config: ConverterDoclingConfig, translate_config: MDTranslateConfig) -> Self:
+                  convert_config: "ConverterDoclingConfig", translate_config: MDTranslateConfig) -> Self:
         ...
 
     @overload
diff --git a/docutranslate/translater/interfaces.py b/docutranslate/translater/interfaces.py
index 77e7327..656841c 100644
--- a/docutranslate/translater/interfaces.py
+++ b/docutranslate/translater/interfaces.py
@@ -1,4 +1,4 @@
-from typing import runtime_checkable, Protocol, TypeVar
+from typing import Protocol, TypeVar
 
 from docutranslate.agents import Agent
 from docutranslate.ir.document import Document
@@ -6,7 +6,6 @@ from docutranslate.ir.document import Document
 T=TypeVar('T',bound=Document)
 V=TypeVar('V',bound=Agent)
 
-@runtime_checkable
 class Translator(Protocol[T,V]):
     """
     翻译中间文本（原地替换），Translator不做格式转换
diff --git a/lite.spec b/lite.spec
index 0aadc83..572b9ed 100644
--- a/lite.spec
+++ b/lite.spec
@@ -9,7 +9,7 @@ a = Analysis(
     hookspath=[],
     hooksconfig={},
     runtime_hooks=[],
-    excludes=["docling","docutranslate.converter.converter_docling"],
+    excludes=["docling","docutranslate.converter.x2md.converter_docling"],
     noarchive=False,
     optimize=0,
 )