fix(site): services polish — FAQ containment, /contact CTA, drop "for-hire" line

- Remove the "not controlled modeling for hire" framing from the homepage
  services preview + both services-page occurrences (FAQ answer + education
  section).
- Wrap the services FAQ in a section-container so it stops breaking out of the
  section rhythm; constrain answer width to max-w-3xl.
- Point "Request a Consultation" at /contact (the contact-form shortcut page)
  instead of the fragile /#contact cross-page hash.

apps/web/src/components/landing/services-preview.tsx

@@ -40,7 +40,7 @@ export function ServicesPreview() {
                 <p className="text-base text-muted-foreground leading-relaxed">
                     Training, talks, and open-source GEANT4 labs on radiation transport and
                     semiconductor detectors, led by a PhD with a Lawrence Livermore background.
-                    Published methods and teaching, not controlled modeling for hire.
+                    Published methods and teaching.
                 </p>
             </Card>
         </div>