.contents .main .slide-1:before {
  background: #000 url("http://img.gangneung-port.co.kr/intro/mv_1.jpg")
    no-repeat center;
}

.contents .main .slide-2:before {
  background: #eee url("http://img.gangneung-port.co.kr/intro/mv_2.jpg")
    no-repeat center;
}

/* .contents .main .slide-1:before {
  background: #000
    url("http://sunnyking77.ebiz.test/img/tourist/gangneung/gangneung-port.co.kr/intro/mv_1.jpg")
    no-repeat center;
}
.contents .main .slide-2:before {
  background: #eee
    url("http://sunnyking77.ebiz.test/img/tourist/gangneung/gangneung-port.co.kr/intro/mv_2.jpg")
    no-repeat center;
} */

.contents .main .slide-1:after,
.contents .main .slide-2:after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  background: rgba(0, 0, 0, 0.15);
  z-index: 400;
}