Refactor responsive styles in index.astro for improved layout

- Adjusted padding and margin for .neon-title, .neon-subtitle, and .cta-secondary-explosive classes to enhance the layout on smaller screens, ensuring a cleaner and more consistent appearance.

src/pages/[lang]/index.astro

@@ -468,12 +468,14 @@ const metadata = {
   @media (max-width: 768px) {
     .neon-title {
       font-size: clamp(2rem, 8vw, 4rem);
-      padding-left: 1rem;
+      padding-left: 0;
+      padding-right: 0;
     }
     
     .neon-subtitle {
       font-size: 1.2rem;
-      padding-left: 1rem;
+      padding-left: 0;
+      padding-right: 0;
     }
     
     .content-section {
@@ -485,7 +487,7 @@ const metadata = {
     .cta-secondary-explosive {
       padding: 1rem 2rem;
       font-size: 1rem;
-      margin-left: 1rem;
+      margin-left: 0;
     }
     
     .cta-subtitle {