Wonky image crisis

[OBXKH]

Hello,

please see

Home

note the image there, hot tub

on desktop, the image is fine... as i coded in my text editor

on my iphone, the image is not displaying the appropriate size...

in dev tools, the image behaves perfect, even when i adjust the screen size..

start to finish, flawless

maybe you could try

again, on my iphone the image is small, like a postage stamp,

long story short my desktop is showing the image fine, smaller device like my iphone the image is far different

i have a problem and need your help

thank you!