Update index.md

Author: fhyuancn

docs/index.md

@@ -41,10 +41,16 @@ This project presents a physics-based signal correction framework for removing
 
     [ESIIL staff edit in Markdown](https://github.com/CU-ESIIL/Summit_group_2026_14/edit/main/docs/index.md?plain=1#L28){ .md-button target="_blank" rel="noopener" }
 
+![Team hero image](assets/Picture3.png)
+![Team hero image](assets/hero/hero1.png)
+
+![Team hero image](assets/Picture2.png)
+![Team hero image](assets/fig2.png)
 
-![Team hero image](assets/hero/hero2.png)
 ![Team hero image](assets/hero/hero.png)
 
+
+
 !!! note "How to replace the image above"
     Upload an image that represents your project and welcome people to your page.