style: 首页整体尺寸缩小约 67%

- useHomeResponsive: 标题尺寸 4xl→2xl，正文 xl→md
- HomePage: VStack/SimpleGrid 间距缩小
- HeroHeader: spacing/padding 缩小，maxW 调整
- FeaturedFeatureCard: 图标、标题、按钮尺寸缩小
- FeatureCard: 卡片高度 180→120px，整体元素尺寸缩小

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Home/HomePage.tsx

@@ -91,7 +91,7 @@ const HomePage: React.FC = () => {
 
         <Container maxW="7xl" position="relative" zIndex={30} px={containerPx}>
           <VStack
-            spacing={{ base: 8, md: 12, lg: 16 }}
+            spacing={{ base: 5, md: 8, lg: 10 }}
             align="stretch"
             minH={heroHeight}
             justify="center"
@@ -104,8 +104,8 @@ const HomePage: React.FC = () => {
             />
 
             {/* 核心功能面板 */}
-            <Box pb={{ base: 8, md: 12 }}>
-              <VStack spacing={{ base: 6, md: 8 }}>
+            <Box pb={{ base: 5, md: 8 }}>
+              <VStack spacing={{ base: 4, md: 5 }}>
                 {/* 特色功能卡片 - 新闻中心 */}
                 <FeaturedFeatureCard
                   feature={featuredFeature}
@@ -115,7 +115,7 @@ const HomePage: React.FC = () => {
                 {/* 其他功能卡片 */}
                 <SimpleGrid
                   columns={{ base: 1, md: 2, lg: 3 }}
-                  spacing={{ base: 4, md: 5, lg: 6 }}
+                  spacing={{ base: 2, md: 3, lg: 4 }}
                   w="100%"
                 >
                   {regularFeatures.map((feature) => (