大场景版本更新：多个背景音乐

Scene/src/pages/A2main/index.tsx

@@ -83,7 +83,7 @@ function A2main() {
   useEffect(() => {
     const sections = document.querySelectorAll('.section1, .section2, .section3, .section4, .section5')
     sections.forEach((section, index) => {
-      section.setAttribute('data-index', index.toString())
+      section.setAttribute('data-index', (index + 1).toString())
       console.log(section)
     })
   }, [])