refactor: 数据层对齐HSI架构与水墨雅致视觉系统

- 产品分类统一为企业套装区+专业产品区，删除growth分类
- 导航数据对齐HSI层级，独立产品改为专业产品
- Hero主题从深色渐变改为水墨雅致浅色系(宣纸色底/墨色文字)
- 设计系统hero文字颜色从白色改为stone系列
- 解决方案接口添加L3信任层可选字段(TODO标记)

src/lib/constants/index.ts

@@ -1,10 +1,13 @@
 export { COMPANY_INFO } from './company';
 export { NAVIGATION, NAVIGATION_V2, MEGA_DROPDOWN_DATA } from './navigation';
-export type { NavigationItem, NavigationItemV2, MegaDropdownItem, MegaDropdownData } from './navigation';
+export type { NavigationItem, NavigationItemV2, MegaDropdownItem, MegaDropdownGroup, MegaDropdownData } from './navigation';
 export { STATS, type StatItem } from './stats';
 export { SERVICES } from './services';
-export { PRODUCTS, type Product } from './products';
+export { PRODUCTS, PRODUCT_CATEGORIES, type Product, type ProductCategory } from './products';
+export { STANDALONE_PRODUCTS, type StandaloneProduct } from './standalone-products';
 export { NEWS, type NewsItem, type NewsCategory } from './news';
 export { TEAM_MEMBERS, type TeamMember } from './team';
 export { METHODOLOGY, type MethodologyPhase } from './methodology';
 export { SOLUTIONS, type Solution } from './solutions';
+export { HERO_THEMES, getHeroTheme, type HeroTheme, type HeroLayout, type HeroTexture } from './hero-themes';
+export { getProductCrossRefs, getSolutionCrossRefs, getServiceCrossRefs, type CrossReference } from './cross-references';