更新项目结构和配置

package.json

@@ -2,7 +2,7 @@
   "name": "贝凡官网",
   "type": "module",
   "version": "1.0.0",
-  "packageManager": "pnpm@10.29.2",
+  "packageManager": "pnpm@10.31.0",
   "scripts": {
     "dev": "astro dev",
     "start": "astro dev",
@@ -11,12 +11,12 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^5.7.3"
+    "astro": "^5.18.0"
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.6",
-    "@astrojs/tailwind": "^6.0.2",
-    "tailwindcss": "^3.4.19",
+    "@tailwindcss/vite": "^4.2.1",
+    "tailwindcss": "^4.2.1",
     "typescript": "^5.9.3"
   },
   "pnpm": {