refactor: adjust network page styling and typography

- Changed heading levels from H3 to H4 in NetworkCapabilities for better hierarchy
- Updated PrimaryFeatures section with darker background and consistent border styling
- Removed text-lg class from paragraph for standard sizing

src/pages/network/Features.tsx

@@ -8,6 +8,7 @@ import { H2, P, H3, CT, CP, Eyebrow } from '@/components/Texts'
 export function Features() {
   return (
     <section className="w-full max-w-8xl mx-auto bg-transparent">
+      
 
       {/* ✅ Top spacer + full-width line */}
       <div className="max-w-7xl mx-auto py-6 border-x border-gray-100 bg-white border-t-0 border-b-0" />