How does the slider show responsive at mobile view?

Hi support,
slider in header so good in desktop, but I think it’s not good in mobile view.
it’s not view responsive.
how to make it view responsive?
And how to background image of slider fit width?

my site: https://betonamukankou.com/
screenshot in mobile view: https://prnt.sc/nwy257

• This topic was modified 5 years by syduc91.