@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;
  
  background-size: 100% 100%;
  background-repeat: no-repeat;
  border-bottom: 10px solid #ebebeb;
}
.ctn_1 .w1280 {
  background-color: transparent;
}
.ctn_1 .product {
  display: flex;
  justify-content: center;
  align-items: center;
}
.ctn_1 .product .img {
  width: 31.25%;
  position: relative;
  padding-top: 31.25%;
  overflow: hidden;
}
.ctn_1 .product .img img {
  transition: all 0.3s;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.ctn_1 .product .img:hover img {
  transform: translate(-50%, -50%) scale(1.05);
}
.ctn_1 .product .txt {
  width: 65%;
  padding-left: 2%;
  /* ul{
                display: flex;
                justify-content: flex-start;
                flex-wrap: wrap;
                margin-top: .8rem;
                li{
                    margin-bottom: .5rem;
                    width: 35%;
                    color: #808080;
                    font-size: 12px;
                    line-height: 1.5;
                    span{
                        color: #000;
                        font-weight: bold;
                    }
                }
            } */
}
.ctn_1 .product .txt .tit {
  color: #000;
  font-weight: bold;
}
.ctn_1 .product .txt .subtit {
  color: #808080;
  margin-top: 1rem;
  line-height: 1.8;
}
.ctn_1 .product .txt .parameter {
  color: #000;
  font-weight: bold;
  padding-top: 1rem;
  border-top: 1px solid #e2e2e2;
  margin-top: 1rem;
}
.ctn_2 {
  width: 100%;
  overflow: hidden;
  background-color: #fff;
}
.ctn_2 .tit {
  color: #7B191F;
  font-weight: bold;
  padding-bottom: 1rem;
  margin-bottom: 1.3rem;
  border-bottom: 1px solid #ebebeb;
}
.ctn_2 .sw_box {
  position: relative;
  padding: 0 10px;
}
.ctn_2 .sw_box .swiper-button-next,
.ctn_2 .sw_box .swiper-button-prev {
  background-image: url(' ');
  width: 30px;
  height: 30px;
  background-color: #7B191F;
  color: #fff;
  text-align: center;
  line-height: 30px;
  border-radius: 100%;
  overflow: hidden;
}
.ctn_2 .sw_box .swiper-button-next {
  right: 0;
}
.ctn_2 .sw_box .swiper-button-prev {
  left: 0;
}
.ctn_2 .sw_box .img {
  width: 100%;
  padding-top: 98%;
  position: relative;
  overflow: hidden;
}
.ctn_2 .sw_box .img img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.ctn_2 .sw_box .img:hover img {
  transform: translate(-50%, -50%) scale(1.05);
}
@media screen and (max-width: 998px) {
  .ctn_1 .product .info .sw_box .swiper-button-next,
  .ctn_1 .product .info .sw_box .swiper-button-prev {
    width: 25px;
    height: 25px;
    font-size: 12px;
    line-height: 25px;
  }
}
@media screen and (max-width: 900px) {
  .ctn_1 .product {
    flex-wrap: wrap;
  }
  .ctn_1 .product .img {
    width: 100%;
    padding-top: 100%;
  }
  .ctn_1 .product .txt {
    width: 100%;
  }
  .ctn_1 .product .txt ul {
    justify-content: space-between;
  }
  .ctn_1 .product .txt ul li {
    width: 48%;
  }
  .ctn_2 .parameter {
    overflow-x: scroll;
  }
  .ctn_2 .parameter img {
    width: auto;
  }
}