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/components/HeroHeader.tsx

@@ -21,9 +21,9 @@ export const HeroHeader: React.FC<HeroHeaderProps> = ({
 }) => {
   return (
     <VStack
-      spacing={{ base: 4, md: 5, lg: 6 }}
+      spacing={{ base: 2, md: 3, lg: 4 }}
       textAlign="center"
-      pt={{ base: 4, md: 6, lg: 8 }}
+      pt={{ base: 2, md: 4, lg: 5 }}
     >
       <Heading
         size={headingSize}
@@ -37,9 +37,9 @@ export const HeroHeader: React.FC<HeroHeaderProps> = ({
       <Text
         fontSize={heroTextSize}
         color="whiteAlpha.800"
-        maxW={{ base: '100%', md: '2xl', lg: '3xl' }}
+        maxW={{ base: '100%', md: 'xl', lg: '2xl' }}
         lineHeight="tall"
-        px={{ base: 4, md: 0 }}
+        px={{ base: 2, md: 0 }}
       >
         专业投资研究工具,助您把握市场机遇
       </Text>