[snakes1100]

As your site forces guests to the mobile style, we cant see the site on a mobile device in the desktop style.

As the example below in on a vb 4 site i run to correct for ads & bg images, not really fixing the logo size on the site, you can modify your templates & implement the changes using the @media for css, the code below is just an example.

As the pelican advert isnt part of your logo, id add some better screenshots of what youre trying to achieve.

.above_body {
    background-image: url(forums/images/logo-bg-fade-2.png);
  }

  @media screen and (min-width: 320px) {
    .above_body {
      background-image: url(forums/images/logo-bg-fade-600x200.png);
    }
  }
  @media screen and (min-width: 640px)
  {
    .above_body {
      background-image: url(forums/images/logo-bg-fade-900x200.png);
    }
  }
  @media screen and (min-width: 1024px) {
    .above_body {
      background-image: url(forums/images/logo-bg-fade-1900x200.png);
    }
  }