I would like to use the same background graphics for the CERN QTI website like the one used on home.cern (please see the image below). Could you please tell me where I could find it:
home.cern uses a different theme what you can do is to use the CERN override theme and in there you can add any background image to the website using basic CSS in the theme.css file
Well Anastasiia you can also use the Landing page Content Type and add this image to the background of your section with the animation so as to gain something replicating to that of home website.
You can follow the following steps :
Go to Content → Add content → Landing Page
Once created the Landing Page CT you can add components and use the image and animation for that section of the web page
Here is the background image
It will be easier than overriding the theme. I hope this helps you.