box-shadow for images

Hello,

I have a problem with turning off the shadow-box around added images. I am adding images by Themify Page Builder module but I believe it’s a Vogue theme which impose the box-shadow by CSS. I tired to change the box-shadow to none in style.css and even in plugin Themify css but the box around transparent image still exists. How can I turn it off?

the page is https://www.halkalife.pl and the cat in the middle of the page is transparent but still box-shadow is added.

Even If I set below box to none there is no effect.
.page-content img, .entry-content img, .entry-summary img {
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);