style.css

body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

ul {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: #ccc;
  margin: 0;
  padding: 0;
}

ul li {
  list-style: none;
  position: relative;
  width: 20%;
  height: 100%;
  border-right: 1px solid #303031;
  float: left;
  box-sizing: border-box;
  transition: 0.5s;
  text-align: center;
  overflow: hidden;
}

ul li:nth-child(1) {
  background: url('bg1.jpg');
  background-size: cover;
  background-position: center;
}
ul li:nth-child(2) {
  background: url('bg2.jpg');
  background-size: cover;
  background-position: center;
}

ul li:nth-child(3) {
  background: url('bg3.jpg');
  background-size: cover;
  background-position: center;
}

ul li:nth-child(4) {
  background: url('bg4.jpg');
  background-size: cover;
  background-position: center;
}

ul li:nth-child(5) {
  background: url('bg5.jpg');
  background-size: cover;
  background-position: center;
}

ul:hover li {
  width: 10%;
}

ul li:hover {
  width: 60%;
}

ul li .content {
  position: absolute;
  bottom: -100%;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  opacity: 0;
}

ul li:hover .content {
  bottom: 0;
  transition: 0.5s;
  transition-delay: 0.5s;
  opacity: 1;
}