🐛 修改dead link

docs/en/index.md

@@ -13,15 +13,21 @@ hero:
     - theme: alt
       text: API Reference
       link: ./api/
+    - theme: alt
+      text: Best Practice
+      link: ./demo/best-practice
   image:
     src: /mbcp-logo.svg
     alt: MBCP logo
 
 features:
   - title: Easy to use
+    icon: 🛠️
     details: Through a simple interface, most of the geometric operations and particle production requirements have been achieved
   - title: Integrated
+    icon: 📦
     details: Encapsulated and integrated<code>numpy</code>, <code>scipy</code> and <code>sympy</code>, making script writing as simple as using Geogebra
   - title: Rich presets
+    icon: 🧊
     details: Rich presets and examples, you can use it directly, and you can also customize the parameters to create your own effects
 ---