I have 6 col-lg-3 in my container. Each div including another div, h4 and p.
Included divs have background-image, and some properties in CSS.
And I want to change included div background-image on hovering col-lg-3 div
But it just ignore :hover and nothing happening. 
Ive tried not only change background-images, but change color, add borders, etc. But no response. Heres one of div.col-lg-3...
.reasons .col-lg-3 div {
  width: 99px;
  height: 99px;
  margin: 10px auto 5px auto;
  background-size: 99px 99px;
  background-repeat: no-repeat;
  transition: 0.5s ease;
}
.community:hover div {
  background-image: url('img/communityReverse.png');
}
<div class="col-lg-3 community">
  <div style="background-image: url('img/community.png')"></div>
  <h4>Lorem ipsum dolor</h4>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p>
</div>
.community:hover div{ ... } seems not working, but for example .community:hover h4{ font-size: 30px; } ok, no problem. I cant see what is wrong