Target a css class inside another css class

Not certain what the HTML looks like (that would help with answers). If it’s

<div class="testimonials content">stuff</div>

then simply remove the space in your css. A la…

.testimonials.content { css here }

UPDATE:

Okay, after seeing HTML see if this works…

.testimonials .wrapper .content { css here }

or just

.testimonials .wrapper { css here }

or

.desc-container .wrapper { css here }

all 3 should work.