Styling site-title homepage

Hello,

I need some help with styling the site-title on my homepage. I have put the following CSS in my child theme (twenty seventeen):

@media screen and (min-width:768px) {
.site-title {
font-size:22px;
font-weight:600;
text-transform:none;
letter-spacing:normal;
margin-top:-2em;
}
}

and also:

h1 {
color:#ff6200!important;
font-family:arial,sans-serif!important;
font-size:1em!important;
font-style:normal!important;
font-weight:600!important;
line-height:6;
letter-spacing:normal!important;
text-transform:none!important;
}

On every page, except my homepage, the styling of both the site-title as the page-title are okay. Only on my homepage the site-title appears as a page title. Does anyone know how I can get this right? Thx!

Marco

The page I need help with: [log in to see the link]