diff --git a/build.bat b/build.bat
index 44af5d7..63c052c 100644
--- a/build.bat
+++ b/build.bat
@@ -4,6 +4,9 @@ REM CutThenThink Windows Build Script - Cloud Only Version
 REM ================================
 REM 纯云端版本 - 无需本地 ML 库
 
+REM 设置控制台编码为 UTF-8
+chcp 65001 >nul 2>&1
+
 cd /d "%~dp0"
 
 echo ========================================
@@ -18,7 +21,7 @@ echo ========================================
 echo.
 
 REM Check Python
-echo [1/4] 检查 Python...
+echo [1/5] 检查 Python...
 python --version 2>nul
 if errorlevel 1 (
     echo 错误: 未找到 Python
@@ -27,7 +30,19 @@ if errorlevel 1 (
 )
 
 echo.
-echo [2/4] 安装核心依赖...
+echo [2/5] 检查源码大小...
+set SIZE=0
+for /r %%A in (src\*) do (
+    set /a SIZE+=%%~zA
+)
+if %SIZE% GTR 5242880 (
+    echo 警告: src 目录大小超过 5MB，构建的 exe 可能会很大
+    echo 当前大小: %SIZE% 字节
+    echo.
+)
+
+echo.
+echo [3/5] 安装核心依赖...
 python -m pip install --user pyinstaller 2>nul
 python -m pip install --user "PyQt6>=6.7.0" 2>nul
 python -m pip install --user "SQLAlchemy>=2.0.36" 2>nul
@@ -35,12 +50,12 @@ python -m pip install --user openai anthropic 2>nul
 python -m pip install --user requests pyyaml pillow pyperclip 2>nul
 
 echo.
-echo [3/4] 清理旧的构建...
+echo [4/5] 清理旧的构建...
 if exist build rmdir /s /q build
 if exist dist rmdir /s /q dist
 
 echo.
-echo [4/4] 开始构建...
+echo [5/5] 开始构建...
 python -m PyInstaller ^
     --noconfirm ^
     --name "CutThenThink" ^