feat: Mecanismo section (04, dark) — 3-step method

app/page.tsx

@@ -1,6 +1,7 @@
 import { Hero } from '@/components/sections/Hero';
 import { FraseAncla } from '@/components/sections/FraseAncla';
 import { ParaQuien } from '@/components/sections/ParaQuien';
+import { Mecanismo } from '@/components/sections/Mecanismo';
 
 export default function Home() {
   return (
@@ -8,6 +9,7 @@ export default function Home() {
       <Hero variant="editorial" />
       <FraseAncla />
       <ParaQuien />
+      <Mecanismo />
     </main>
   );
 }