.at1 {
  padding: 115px 0 100px;
}
.at1 .t1 {
  color: #c11920;
  font-size: 40px;
  line-height: 40px;
  font-weight: bold;
}
.at1 .t2 {
  color: #999999;
  font-size: 16px;
  padding: 10px 0 40px;
}
.at1 .t3 {
  position: relative;
}
.at1 .t3 .a1 {
  display: block;
  width: 100%;
}
.at1 .t3 .a2 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.at1 .t3 .a2 .b1 {
  cursor: pointer;
}
.at1 .t3 .a2 #videoModal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
}
.at1 .t3 .a2 .c1 {
  position: absolute;
  top: 20%;
  left: 20%;
  width: 60%;
  height: 60%;
}
.at1 .t3 .a2 .c1 .d1 {
  position: absolute;
  top: -30px;
  right: -30px;
  color: #fff;
  font-size: 30px;
  cursor: pointer;
}
.at1 .t3 .a2 #myVideo {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.at1 .t4 {
  color: #333333;
  font-size: 16px;
  line-height: 1.8;
  margin-top: 50px;
}
@media screen and (max-width: 1200px) {
  .at1 {
    padding: 100px 0 80px;
  }
  .at1 .t1 {
    font-size: 32px;
    line-height: 32px;
  }
}
@media screen and (max-width: 800px) {
  .at1 {
    padding: 60px 0 60px;
    text-align: center;
  }
  .at1 .t1 {
    font-size: 28px;
    line-height: 28px;
  }
  .at1 .t2 {
    font-size: 14px;
    padding: 10px 0 20px;
  }
  .at1 .t3 .a2 .b1 {
    width: 50px;
  }
  .at1 .t3 .a2 .c1 {
    position: absolute;
    top: 30%;
    left: 20px;
    width: calc(100% - 40px);
    height: auto;
  }
  .at1 .t3 .a2 .c1 .d1 {
    right: 0;
    top: -50px;
  }
  .at1 .t4 {
    font-size: 14px;
    line-height: 1.6;
    margin-top: 30px;
    text-align: left;
  }
}
.at2 {
  background: #f8f8f8;
  padding-top: 80px;
}
.at2 .t1 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 70px;
}
.at2 .t1 .le {
  color: #444444;
  font-size: 36px;
}
.at2 .t1 .ri {
  display: flex;
  align-items: center;
}
.at2 .t1 .ri .a1 {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1px solid #999999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: static !important;
  background: none;
  margin-top: 0;
}
.at2 .t1 .ri .a1:nth-of-type(1) {
  margin-right: 20px;
}
.at2 .t1 .ri .a1:hover {
  border-color: #c11920;
}
.at2 .t1 .ri .a1:hover .b2 {
  display: none;
}
.at2 .t1 .ri .a1:hover .b3 {
  display: block;
}
.at2 .t1 .ri .a1 .b1 {
  width: 12px;
}
.at2 .t1 .ri .a1 .b3 {
  display: none;
}
.at2 .t2 .a1 {
  display: flex;
  align-items: center;
}
.at2 .t2 .a1 .b1 {
  width: 30px;
  height: 30px;
  box-sizing: border-box;
  border: 3px solid #c11920;
  border-radius: 50%;
  margin-right: 20px;
}
.at2 .t2 .a1 .b2 {
  color: #999999;
  font-size: 18px;
  font-weight: bold;
}
.at2 .t2 .a2 {
  display: flex;
  align-items: center;
}
.at2 .t2 .a2 .b1 {
  width: 2px;
  height: 370px;
  background: #d0d0d0;
  margin-left: 14px;
  margin-right: 34px;
}
.at2 .t2 .a2 .b2 {
  color: #333333;
  font-size: 16px;
  display: none;
  flex: 1;
  margin-right: 5px;
}
.at2 .swiper-slide {
  margin-top: calc(510px - 370px);
}
.at2 .swiper-slide-active {
  margin-top: 0;
}
.at2 .swiper-slide-active .a1 .b1 {
  background: #c11920;
}
.at2 .swiper-slide-active .a1 .b2 {
  color: #c11920;
  font-size: 34px;
  line-height: 30px;
}
.at2 .swiper-slide-active .a2 .b1 {
  background: #c11920;
  width: 4px;
  margin-left: 12px;
  margin-right: 32px;
  height: 510px;
}
.at2 .swiper-slide-active .a2 .b2 {
  display: block;
}
@media screen and (max-width: 800px) {
  .at2 {
    padding-top: 60px;
  }
  .at2 .t1 {
    margin-bottom: 40px;
  }
  .at2 .t1 .le {
    font-size: 24px;
  }
  .at2 .t1 .ri .a1 {
    width: 30px;
    height: 30px;
  }
  .at2 .t1 .ri .a1 .b1 {
    width: 6px;
  }
  .at2 .t1 .ri .a1:nth-of-type(1) {
    margin-right: 10px;
  }
  .at2 .t2 .a1 .b2 {
    font-size: 14px;
  }
  .at2 .t2 .a2 .b1 {
    height: 200px;
  }
  .at2 .t2 .a2 .b2 {
    font-size: 14px;
  }
  .at2 .swiper-slide {
    margin-top: calc(300px - 200px);
  }
  .at2 .swiper-slide-active {
    margin-top: 0;
  }
  .at2 .swiper-slide-active .t1 .a1 .b2 {
    font-size: 20px;
  }
  .at2 .swiper-slide-active .a2 .b1 {
    height: 300px;
  }
}
.at3 {
  padding: 100px 0 125px;
}
.at3 .t1 {
  color: #252525;
  font-size: 36px;
  margin-bottom: 50px;
  text-align: center;
}
.at3 .t2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 80%;
  margin: 0 auto;
  position: relative;
  margin-bottom: 40px;
}
.at3 .t2::before {
  content: '';
  width: 100%;
  height: 3px;
  background: #c11920;
  position: absolute;
  top: 50%;
  left: 0;
  margin-top: -2px;
  z-index: 1;
}
.at3 .t2 .ls {
  width: 170px;
  height: 170px;
  border: 3px dashed #c11920;
  border-radius: 50%;
  color: #333333;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  background: #fff;
  cursor: pointer;
}
.at3 .t2 .active {
  background: #c11920;
  color: #fff;
}
.at3 .t2 .active::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid #c11920;
  position: absolute;
  bottom: -20px;
}
.at3 .t3 .ls {
  color: #fff;
  background: #c11920;
  font-size: 16px;
  display: none;
}
.at3 .t3 .active {
  padding: 40px 115px;
  display: block;
}
@media screen and (max-width: 1200px) {
  .at3 {
    padding: 80px 0 80px;
  }
  .at3 .t1 {
    font-size: 30px;
    margin-bottom: 40px;
  }
  .at3 .t2 {
    width: 100%;
  }
  .at3 .t2 .ls {
    width: 100px;
    height: 100px;
    font-size: 20px;
  }
}
@media screen and (max-width: 800px) {
  .at3 {
    padding: 60px 0 60px;
  }
  .at3 .t1 {
    font-size: 28px;
    margin-bottom: 30px;
  }
  .at3 .t2 .ls {
    font-size: 18px;
    width: 80px;
    height: 80px;
    font-size: 14px;
  }
  .at3 .t3 .ls {
    font-size: 14px;
  }
  .at3 .t3 .active {
    padding: 20px;
  }
}
.at4 {
  padding: 80px 0;
  background: #f8f8f8;
}
.at4 .t1 {
  color: #252525;
  font-size: 36px;
  margin-bottom: 60px;
  text-align: center;
}
.at4 .t2 {
  width: 100%;
}
.at4 .t2 .swiper-container {
  width: 100%;
}
.at4 .t2 .swiper-wrapper {
  width: 100%;
}
.at4 .t2 img {
  width: 100%;
  display: block;
  height: 455px;
  object-fit: cover;
}
@media screen and (max-width: 1200px) {
  .at4 {
    padding: 60px 0;
  }
  .at4 .t1 {
    font-size: 30px;
    margin-bottom: 40px;
  }
  .at4 .t2 img {
    height: 300px;
  }
}
@media screen and (max-width: 1200px) {
  .at4 {
    padding: 40px 0;
  }
  .at4 .t1 {
    font-size: 28px;
    margin-bottom: 30px;
  }
  .at4 .t2 img {
    height: 200px;
  }
}