✨ 更新文档，替换功能图标以增强可视化效果

docs/en/index.md

@@ -20,19 +20,19 @@ hero:
 
 features:
   - title: Powerful Driver
-    icon: lightning
+    icon: 🚀
     details: Based on NoneBot2, it can be quickly installed on existing NoneBot2 or Liteyuki instances
 
   - title: Interface Specification
-    icon: code
+    icon: 💻
     details: Any interface that follows the OpenAI standard can interact with MarshoAI
 
   - title: Easy to Extend
-    icon: puzzle
+    icon: 🧩
     details: Use Python writing tools and plugins to achieve function calls, and easily extend the functionality of MarshoAI
 
   - title: Self-Bootstrapping
-    icon: robot
+    icon: 🤖
     details: Use AI to automatically write code for the robot, achieve self-learning and self-optimization
 ---