diff --git a/unity/Assets/Light/shaders/SpriteWithGroundClip.shader b/unity/Assets/Light/shaders/SpriteWithGroundClip.shader
index cecfd55..a3616d5 100644
--- a/unity/Assets/Light/shaders/SpriteWithGroundClip.shader
+++ b/unity/Assets/Light/shaders/SpriteWithGroundClip.shader
@@ -35,6 +35,7 @@ Shader "Custom/SpriteWithGroundClip"
         Pass
         {
             Name "SpriteWithGroundClip"
+            Tags { "LightMode" = "UniversalForward" }
             
             HLSLPROGRAM
             #pragma vertex vert
@@ -42,6 +43,7 @@ Shader "Custom/SpriteWithGroundClip"
             #pragma multi_compile_instancing
 
             #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
 
             struct Attributes
             {
@@ -92,6 +94,10 @@ Shader "Custom/SpriteWithGroundClip"
                 half4 texColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, input.uv);
                 half4 color = texColor * input.color * _Color;
 
+                // 直接接受 Directional Light 的颜色和强度（color 已包含 intensity）
+                Light mainLight = GetMainLight();
+                color.rgb *= mainLight.color;
+
                 // 地面裁剪逻辑
                 if (_EnableClip > 0.5)
                 {