img.intro_block {
 border: 10px solid #ffffff;
 border-radius: 50%;
 -webkit-box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.2);
 -moz-box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.2);
 box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.2);
}

.corner {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 1050px;
 }

.corner img.slide_1 {
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 1050px;
 }

.corner:after {
  content: '';
  width: 0;
  height: 0;
  border-left: 0px solid #fff;
  border-top: 0px solid transparent;
  border-right: 300px solid transparent;
  border-bottom: 200px solid #fff;
  position: absolute;
  bottom: 0;
  left: 0;
}