更新样式和功能：添加背景图、打字机效果，优化留言板和吐槽区布局

src/main.js

@@ -2,7 +2,6 @@ import { createApp } from 'vue'
 import App from './App.vue'
 import Router from './router/Router'
 import './assets/index.css'
-
 const app = createApp(App)
 app.use(Router)
 app.mount('#app')