feat(website): 三轮视觉改造与页面过渡动画

改造概要（30项）：
- 第一轮：Hero重构/Section差异化/SocialProof强化/CTA对比度/About架构
- 第二轮：字体优化/背景交替/Solutions差异化/Footer五列/MegaDropdown修复
- 第三轮：卡片交互/表单层级/CTA统一/时间线标记/连接线/三列布局/移动导航/Button微交互/SEO Schema
- P3-2：template.tsx+Framer Motion页面过渡/loading.tsx加载状态
- 清理：删除未用组件/hooks，修复重复移动导航，清理冗余CSS

package.json

@@ -38,14 +38,10 @@
     "prepare": "husky"
   },
   "dependencies": {
-    "@antv/g2": "^5.4.8",
     "@playwright/test": "^1.58.2",
-    "@radix-ui/react-dialog": "^1.1.15",
-    "@radix-ui/react-dropdown-menu": "^2.1.16",
-    "@types/three": "^0.183.1",
+    "@radix-ui/react-slot": "^1.2.4",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "critters": "^0.0.23",
     "date-fns": "^4.1.0",
     "framer-motion": "^12.34.3",
     "lucide-react": "^0.563.0",
@@ -53,7 +49,6 @@
     "react": "19.2.3",
     "react-dom": "19.2.3",
     "tailwind-merge": "^3.4.0",
-    "three": "^0.183.1",
     "zod": "^4.3.6"
   },
   "devDependencies": {