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.main_event .event .img_wrap img {

  position: absolute;

  left: 0;

  top: 0;

  width: 100%;

  height: 100%;

  transition: all 0.5s;

}

 

 

---

 

 

 

 

.main_event .event .img_wrap img {

  position: absolute;

  left: 50%;

  top: 50%;

  height: 100%;

  transform: translate(-50% , -50%);

}