Improve styles and content consistency across multiple pages

Standardized H2 headings with a new `.h2-as-text` class for better alignment and styling. Adjusted footer and layout widths to 1200px for improved responsiveness. Updated the KI-Agents profiles, webinar section, and various style modules to ensure consistent formatting, better readability, and cleaner design.

docs/stylesheets/responsive/mobile.scss

@@ -7,6 +7,8 @@
 
   body{
 
+
+
     .md-typeset .headerlink{
       display: none;
     }