Update homepage, use-cases, and people pages; add preloader and new section components

src/app/globals.css

@@ -14,6 +14,7 @@
 html, body {
   margin: 0;
   padding: 0;
+  background: #ffffff;
 }
 
 html.lenis, html.lenis body {
@@ -246,11 +247,6 @@ body.is-home-page.scroll-up .sticky-active {
   z-index: 999999999 !important;
 }
 
-/* Ensure page loader covers everything during initial render */
-.page-loader-container {
-  z-index: 1000000000 !important;
-}
-
 /* Respect user preference for reduced motion */
 @media (prefers-reduced-motion: reduce) {
   /* Disable utility animation classes used across the project */