html, body {
  width: 100%;
  height: 100%;
  margin: 0;
}

.container {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 70vh;
  display: flex;
  background-image: url("./666.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

.container .wraper {
  display: flex;
  margin: auto;
}

.container .wraper .item {
  margin: 0 15px;
  cursor: pointer;
  display: flex;
  background-color: #02b6fd;
  border-radius: 10px;
  opacity: .5;
  transition: all .3s;
}

.container .wraper .item .left {
  width: 0px;
  height: 100%;
  transition: width .5s ease 0s;
}

.container .wraper .item .right {
  width: 100px;
  height: 300px;
  writing-mode: vertical-rl;
  display: flex;
  justify-content: center;
  align-items: center;
  letter-spacing: 5px;
  font-weight: bold;
  font-size: 22px;
  color: #fff;
}

.container .wraper .item.active {
  opacity: 1;
}

.container .wraper .item.active .left {
  width: 400px;
}