Full Width CTA inside container

Hi,

I'm trying to put a full size width CTA (call to action) inside a container page.

You can see an example here https://www.magnetmarketing.it/consulenza-google-ads/ , where the blue bar "Cerchi un Partner affidabile per la gestione delle Campagne Google della tua Azienda?"

The problem is that I see an horizontal scroll line in the bottom page ( see here the screen: https://www.magnetmarketing.it/wp-content/uploads/Cattura.jpg )

This horizontal scroll line, there is not in big screen, but yes for example in mine (around 1300px)

I set this wiht this css class:

.width100 {
color: #fff;
font-size:18px;
background-color:#2489af;
width: 100vw;
position: relative;
left: 50%;
right: 50%;
margin-left: -50vw;
margin-right: -50vw;
}

Thanks