@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;
  padding: 20px 0;
}
.ctn_1 .w1280 .subnav {
  padding: 0 20px;
}
.ctn_1 .product {
  display: flex;
  justify-content: space-between;
  padding-right: 20px;
  margin-top: 1rem;
}
.ctn_1 .product .tab {
  width: 210px;
}
.ctn_1 .product .tab li {
  padding: 1rem 0 1rem 20px;
  font-size: 15px;
  color: #808080;
  position: relative;
  cursor: pointer;
}
.ctn_1 .product .tab li::after {
  content: ' ';
  display: block;
  position: absolute;
  bottom: 0;
  left: 20px;
  width: 170px;
  height: 1px;
  background-color: #ebebeb;
}
.ctn_1 .product .tab li.on {
  color: #7B191F;
  background: url('/repository/image/95569bbb-10c0-432c-88cb-d4eeae271dbe.png?t=1643272163383') right center no-repeat, linear-gradient(90deg, rgba(123, 25, 31, 0.15) 0%, rgba(178, 54, 66, 0) 100%);
}
.ctn_1 .product .tab li.on::after {
  background-color: #7B191F;
}
.ctn_1 .product .info {
  width: calc(100% - 240px);
}
.ctn_1 .product .info .sw_box {
  position: relative;
  padding: 0 10px;
}
.ctn_1 .product .info .sw_box .swiper-button-next,
.ctn_1 .product .info .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_1 .product .info .sw_box .swiper-button-next {
  right: 0;
}
.ctn_1 .product .info .sw_box .swiper-button-prev {
  left: 0;
}
.ctn_1 .product .info .sw_box .img {
  width: 100%;
  padding-top: 98%;
  position: relative;
  overflow: hidden;
}
.ctn_1 .product .info .sw_box .img img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.ctn_1 .product .info .sw_box .img:hover img {
  transform: translate(-50%, -50%) scale(1.05);
}
.ctn_1 .product .sheet {
  padding: 1rem 0 0;
  margin: 2rem 10px 0;
  border-top: 1px solid #ebebeb;
}
.ctn_1 .product .sheet .tit {
  font-weight: bold;
  color: #000;
}
.ctn_1 .product .sheet .img {
  margin-top: 1rem;
}
.ctn_1 .product .parameter {
  display: flex;
  justify-content: space-between;
  padding: 1rem 0;
  margin: 2rem 10px 0;
  border-top: 1px solid #ebebeb;
}
.ctn_1 .product .parameter .tit {
  color: #131415;
  font-weight: bold;
}
.ctn_1 .product .parameter ul {
  margin-top: 0.8rem;
}
.ctn_1 .product .parameter ul li {
  margin-bottom: 0.5rem;
  color: #131415;
  font-size: 12px;
}
.ctn_1 .product .parameter .parameter_l {
  width: 48%;
}
.ctn_1 .product .parameter .parameter_r {
  width: 48%;
}
@media screen and (max-width: 998px) {
  .ctn_1 .product {
    flex-wrap: wrap;
    width: 100%;
    padding: 0 10px;
  }
  .ctn_1 .product .tab {
    width: 100%;
    overflow-x: scroll;
    white-space: nowrap;
  }
  .ctn_1 .product .tab li {
    display: inline-block;
    padding: 1rem;
  }
  .ctn_1 .product .tab li::after {
    height: 0;
  }
  .ctn_1 .product .tab li.on {
    background: #7B191F;
    color: #fff;
  }
  .ctn_1 .product .info {
    width: 100%;
    margin-top: 1.5rem;
  }
  .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;
  }
  .ctn_1 .product .sheet .img {
    overflow-x: scroll;
  }
  .ctn_1 .product .sheet .img img {
    width: auto;
  }
}