Mobile Banner Headers not matching Desktop

We use banner descriptions as a method of giving each page a header / title on the website: https://www.ilikestorytelling.com/

We like how big the banner headers show up on desktop (85px) but want these same titles to be larger in size on the mobile site too. How do I make the mobile banner header font larger?

It looks like you solved with this CSS?

@media screen and (max-width: 640px) {
    #what-is-storytelling .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size:60px
    }

    #the-power-of-stories .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }

    #a-story-perfectly-told-delivers .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }

    #others-like-storytelling .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }

    #storytelling-in-action- .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }

    #get-in-touch .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }
}

@media screen and (max-width: 640px) {
    #retreat-intro .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size:60px
    }

    #stowellakefarm.banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 20px
    }

    #my-story .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }

    #storytellers-circle .banner-thumbnail-wrapper.has-description .desc-wrapper p>strong {
        font-size: 60px
    }
}