fix: formatting errors on home and quote pages

- index.php: add .hero-eyebrow CSS (uppercase eyebrow label above H1)
- index.php: fix unquoted class=section-label attribute
- quote.php: fix hero background from grey to purple gradient (consistent with all other pages)

quote.php

@@ -194,7 +194,8 @@ $breadcrumbs = [
     <style>
         .quote-hero {
             padding: 100px 0 30px; /* padding-top overridden by main.css */
-            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
+            background: linear-gradient(135deg, #1e1b4b 0%, #7c3aed 100%);
+            color: white;
             text-align: center;
         }