Rounding Corner in List Section- behind text

Site URL: https://audreyconducts.squarespace.com/web-design-copy

Howdy Everyone,

I am aiming to create a testimonial slider. I have added a gradient to each card, and altered the arrow color 

However, I would like to round the corners of the "white" section, which is I think just the absence of the gradient background (when I remove the gradient code, everything is white except for the text and the arrows!)

Any help rounding the corners would be greatly appreciated!

Here is the code affecting this section. 

/*gradient testimonial slider*/
.list-item[data-is-card-enabled="true"] {background: linear-gradient(to right, #9062a1, #bfb1c4)!important; border-radius:50px;}
.user-items-list-banner-slideshow__arrow-icon-background {background-color:hsl(28, 5%, 38%)!important; opacity:(.85)!important;}

1 hour ago, AudeyTheConductor said:

Site URL: https://audreyconducts.squarespace.com/web-design-copy

Howdy Everyone,

I am aiming to create a testimonial slider. I have added a gradient to each card, and altered the arrow color 

However, I would like to round the corners of the "white" section, which is I think just the absence of the gradient background (when I remove the gradient code, everything is white except for the text and the arrows!)

Any help rounding the corners would be greatly appreciated!

Here is the code affecting this section. 

/*gradient testimonial slider*/
.list-item[data-is-card-enabled="true"] {background: linear-gradient(to right, #9062a1, #bfb1c4)!important; border-radius:50px;}
.user-items-list-banner-slideshow__arrow-icon-background {background-color:hsl(28, 5%, 38%)!important; opacity:(.85)!important;}

I try the following code and it seems fine.

section[data-section-id="62f2f19cdfd4210650e13d65"] .slide-content {
  border-radius: 20px;
}

Adding it to Home > Design > Custom css

Hope it can help

My testing

fantastic, thank you @bangank36!