refactor(web): 引入 pages 目录并迁移 LandingPage；修正 App 引用与相对路径，保持构建通过

web/src/App.tsx

@@ -6,7 +6,7 @@ import { AITradersPage } from './components/AITradersPage';
 import { LoginPage } from './components/LoginPage';
 import { RegisterPage } from './components/RegisterPage';
 import { CompetitionPage } from './components/CompetitionPage';
-import { LandingPage } from './components/LandingPage';
+import { LandingPage } from './pages/LandingPage';
 import AILearning from './components/AILearning';
 import { LanguageProvider, useLanguage } from './contexts/LanguageContext';
 import { AuthProvider, useAuth } from './contexts/AuthContext';

web/src/pages/LandingPage.tsx

@@ -13,8 +13,8 @@ import {
   Lock,
   Cpu,
 } from 'lucide-react'
-import { CryptoFeatureCard } from './CryptoFeatureCard'
+import { CryptoFeatureCard } from '../components/CryptoFeatureCard'
-import Typewriter from './Typewriter'
+import Typewriter from '../components/Typewriter'
 
 // Animation variants
 const fadeInUp = {
@@ -37,13 +37,7 @@ const staggerContainer = {
   },
 }
 
-const floatingAnimation = {
+// removed floatingAnimation to match simplified style
-  y: [0, -20, 0],
-  transition: {
-    duration: 3,
-    repeat: Infinity,
-  },
-}
 
 export function LandingPage() {
   const [mobileMenuOpen, setMobileMenuOpen] = useState(false)