diff --git a/assets/.gitkeep b/assets/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/assets/audio/music/.gitkeep b/assets/audio/music/.gitkeep
new file mode 100644
index 0000000..9aa01b8
--- /dev/null
+++ b/assets/audio/music/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 音乐资源目录
\ No newline at end of file
diff --git a/assets/audio/sounds/.gitkeep b/assets/audio/sounds/.gitkeep
new file mode 100644
index 0000000..52a719a
--- /dev/null
+++ b/assets/audio/sounds/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 音效资源目录
\ No newline at end of file
diff --git a/assets/audio/voice/.gitkeep b/assets/audio/voice/.gitkeep
new file mode 100644
index 0000000..c7ee643
--- /dev/null
+++ b/assets/audio/voice/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 语音资源目录
\ No newline at end of file
diff --git a/assets/fonts/.gitkeep b/assets/fonts/.gitkeep
new file mode 100644
index 0000000..800c4ba
--- /dev/null
+++ b/assets/fonts/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 字体资源目录
\ No newline at end of file
diff --git a/assets/materials/.gitkeep b/assets/materials/.gitkeep
new file mode 100644
index 0000000..4673e1d
--- /dev/null
+++ b/assets/materials/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 材质资源目录
\ No newline at end of file
diff --git a/assets/shaders/.gitkeep b/assets/shaders/.gitkeep
new file mode 100644
index 0000000..b5f3ee3
--- /dev/null
+++ b/assets/shaders/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 着色器资源目录
\ No newline at end of file
diff --git a/assets/sprites/characters/.gitkeep b/assets/sprites/characters/.gitkeep
new file mode 100644
index 0000000..ec3e024
--- /dev/null
+++ b/assets/sprites/characters/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 角色精灵资源目录
\ No newline at end of file
diff --git a/assets/sprites/effects/.gitkeep b/assets/sprites/effects/.gitkeep
new file mode 100644
index 0000000..ae28815
--- /dev/null
+++ b/assets/sprites/effects/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 特效精灵资源目录
\ No newline at end of file
diff --git a/assets/sprites/environment/.gitkeep b/assets/sprites/environment/.gitkeep
new file mode 100644
index 0000000..71129f4
--- /dev/null
+++ b/assets/sprites/environment/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 环境精灵资源目录
\ No newline at end of file
diff --git a/tests/integration/.gitkeep b/tests/integration/.gitkeep
new file mode 100644
index 0000000..d1d5dd3
--- /dev/null
+++ b/tests/integration/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 集成测试目录
\ No newline at end of file
diff --git a/tests/performance/.gitkeep b/tests/performance/.gitkeep
new file mode 100644
index 0000000..956129d
--- /dev/null
+++ b/tests/performance/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 性能测试目录
\ No newline at end of file
diff --git a/tests/unit/.gitkeep b/tests/unit/.gitkeep
new file mode 100644
index 0000000..13e2516
--- /dev/null
+++ b/tests/unit/.gitkeep
@@ -0,0 +1 @@
+# 保持目录结构 - 单元测试目录
\ No newline at end of file