Bur it’s not working for the gap under the image.. The one after the title and before the text, see attachments..

Please try using below custom CSS code to remove it.

body.single-fw-portfolio .fw-page-builder-content > .sh-section {
    padding-top: 0;
}

Another thinks.. I added hyperlink to the text in the page. The just work on the mobile versione and not in the Desktop one.. Any Idea why?

I don’t see the links on your shared page so could you please tell me on which page and what links are not displaying so that i can help you?