Thanks a lot Bolijoro for your precious advice.
Well, I just finished updating again my site:
1) Removed the digital actor/voice.
2) Changed the step by step guide from blue text to white text.
3) Made all images transpirant.
4) Placed the full logo on the left inside the “main black section”.
5) 5px white border on top is not on purpose but unfortunately to get rid of it I need to purchase a domain & hosting and for the moment I can’t.
Please check if I missed something 
Thanks again