diff --git a/CMakeLists.txt b/CMakeLists.txt
index 020b1d6..e032277 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,13 +5,19 @@ set(CMAKE_C_STANDARD 11)
 
 # ======== 静态库 ========
 add_library(DataRouter STATIC datarouter.c)
-target_include_directories(DataRouter PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(DataRouter PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:include>
+)
 
 # ======== 共享库（可选，通过 BUILD_SHARED 控制） ========
 option(BUILD_SHARED "Build shared library" ON)
 if(BUILD_SHARED)
     add_library(DataRouter_shared SHARED datarouter.c)
-    target_include_directories(DataRouter_shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+    target_include_directories(DataRouter_shared PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+        $<INSTALL_INTERFACE:include>
+    )
     set_target_properties(DataRouter_shared PROPERTIES OUTPUT_NAME DataRouter)
 endif()