@keyframes dow_arr1 {
  0% {
    opacity: 0;
  }
  24% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes dow_arr2 {
  0% {
    opacity: 0;
  }
  49% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes large-s {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(1.05);
  }
}
.ctn_1 {
  width: 100%;
  overflow: hidden;
  margin-top: -10%;
  position: relative;
  z-index: 5;
  padding-bottom: 4rem;
}
.ctn_1 .w1280 {
  background-position: top center;
  background-repeat: no-repeat;
  background-size: 100%;
  background-color: #fbfbfb;
}
.ctn_1 .tit {
  width: 96%;
  margin: 1.5rem auto 0;
}
.ctn_1 .tit p {
  display: block;
  color: #000;
  font-weight: bold;
}
.ctn_1 .tit span {
  display: block;
  color: #808080;
  margin-top: 0.6rem;
}
.ctn_1 .des {
  width: 96%;
  margin: 1.5rem auto 0;
  display: flex;
  justify-content: space-between;
}
.ctn_1 .des li {
  width: 49%;
}
.ctn_1 .des li .img {
  width: 100%;
  position: relative;
  padding-top: 60%;
  overflow: hidden;
}
.ctn_1 .des li .img img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s;
}
.ctn_1 .des li .txt {
  margin-top: 1.3rem;
}
.ctn_1 .des li .txt p {
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
  overflow: hidden;
  line-height: 1.5;
  height: 3em;
  color: #000;
  font-weight: bold;
}
.ctn_1 .des li .txt span {
  display: block;
  margin-top: 1rem;
  color: #808080;
  text-align: justify;
}
.ctn_1 .des li:hover .img img {
  transform: translate(-50%, -50%) scale(1.05);
}
@media screen and (max-width: 768px) {
  .ctn_1 .des {
    flex-wrap: wrap;
  }
  .ctn_1 .des li {
    width: 100%;
    margin-bottom: 1.5rem;
  }
}