Remove the blank space between the header and the beginning of a page

Hello !

I know there are already a lot of topics on the subject, but I tried everything and nothing worked for me. Actually I would like to remove the blank space between the header and the beginning of a page.

I tried to use the code below but there is still a bit of blank space :

.page-id-xxx .panel-row-style:first-child {
    padding-top: 0 !important;
}

Could you help me ?

Thanks you in advance for your help!

Clément

Hi,
Can you post your URL of your site here?

Regards,