Slider images dont rationalise on mobile- css problem?

My website www.srspartnership.com is having problems with me resizing the slider images for mobile. I really like how http://www.brandelion.co.uk/ has done their header slider images. Especially on mobile. I cant seem to find the code to edit my header images effectively so any help is welcome.
Also how do I fix my mast head to be sized like brandelion for mobile? it fits perfectly.
cheers, Stephen

I’ve answered this on your other topic here.

> Also how do I fix my mast head to be sized like brandelion for mobile? it fits perfectly.

Did you add extra custom CSS code? Can’t you just remove it?

Regards,
Kharis