We suggest you to use our QUICK-START pack to get the entire site configured with demo content. It is most easy for you to build the site from scratch. You can also install our TEMPLATE & FRAMEWORK as well, which gives you power to make your site stunning!
Now, you have a powerful TEMPLATE MANAGER with responsive utilities, allows to change the layout. There is THEME MAGIC that let you change the style. Use MEGA MENU to load modules in the dropdown & make it multi-columned. Use CLASS SUFFIX to get more styles.
Please check your configuration specially the Responsive Layout. If every thing is fine, please convert the less to CSS, turn off development mood, keep the responsive mood on, optimize CSS & JS, all you will find in TEMPLATE MANAGER. Now, just deploy it on to the server.