@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 .ctn_des {
  margin: 2rem auto 0;
  width: 96%;
}
.ctn_1 .ctn_des .tit {
  font-weight: bold;
  margin-bottom: 1rem;
}
.ctn_1 .ctn_des p {
  font-size: 14px;
  line-height: 1.8;
  width: 100%;
  margin-bottom: 2rem;
  color: #808080;
}
.ctn_1 .ctn_des .about_img {
  margin: 1rem auto;
}
.ctn_1 .ctn_des .about_img .swiper-slide {
  width: 650px;
  padding-bottom: 30px;
  overflow: hidden;
}
.ctn_1 .ctn_des .about_img .swiper-slide img {
  box-shadow: 0px 17px 20px #ccc;
}
.ctn_1 .ctn_des .about_img .swiper-button-next,
.ctn_1 .ctn_des .about_img .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;
}
@media screen and (max-width: 1024px) {
  .ctn_1 .ctn_des .about_img .swiper-slide {
    width: 500px;
  }
}
@media screen and (max-width: 768px) {
  .ctn_1 .ctn_des .about_img .swiper-slide {
    width: 100%;
  }
  .ctn_1 .w1280 {
    background-repeat: repeat;
    background-size: auto;
  }
}