.ctn1 {
  position: relative;
  overflow: hidden;
  background: #F7F9FB;
}
.ctn1 .text {
  margin-top: 30px;
}
.ctn1 .text p strong {
  font-weight: 700;
  color: #000;
}
.ctn2 {
  position: relative;
  overflow: hidden;
}
.ctn2 .top .swiper-container {
  overflow: hidden;
  border-radius: 10px;
}
.ctn2 .top .swiper-slide {
  opacity: 0;
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -ms-transition: all 0.3s;
}
.ctn2 .top .swiper-slide .tu {
  position: relative;
  overflow: hidden;
}
.ctn2 .top .swiper-slide .tu:before {
  content: '';
  display: block;
  padding-top: calc(650 / 1440 * 100%);
}
.ctn2 .top .swiper-slide .tu img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  left: 0;
  top: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 .top .swiper-slide .tu:hover img {
  transform: scale(1.05);
  -webkit-transform: scale(1.05);
  -moz-transform: scale(1.05);
  -ms-transform: scale(1.05);
}
.ctn2 .top .swiper-slide.swiper-slide-active {
  opacity: 1;
}
.ctn2 .middle .swiper-container {
  overflow: hidden;
}
.ctn2 .middle .swiper-slide {
  width: 260px;
  position: relative;
  text-align: center;
  border-top: 2px solid rgba(0, 0, 0, 0.2);
  cursor: pointer;
}
.ctn2 .middle .swiper-slide:before {
  content: '';
  width: 0;
  height: 2px;
  background: #000;
  position: absolute;
  left: 50%;
  top: -2px;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 .middle .swiper-slide h2 {
  padding-top: 20px;
  color: #666;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 .middle .swiper-slide:not(:last-child) {
  margin-right: 20px;
}
.ctn2 .middle .swiper-slide.active:before {
  width: 100%;
  left: 0;
}
.ctn2 .middle .swiper-slide.active h2 {
  color: #333;
  font-weight: 600;
}
.ctn2 .middle .swiper-slide:hover h2 {
  color: #333;
}
.ctn2 .bottom {
  width: 50%;
  margin-left: auto;
  margin-right: auto;
}
.ctn2 .bottom .swiper-container {
  overflow: hidden;
}
.ctn2 .bottom .swiper-slide {
  opacity: 0;
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -ms-transition: all 0.3s;
}
.ctn2 .bottom .swiper-slide ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.ctn2 .bottom .swiper-slide ul li {
  padding: 10px 20px;
  color: #333;
  border: 1px solid #666;
  border-radius: 100px;
  margin: 6px;
}
.ctn2 .bottom .swiper-slide.swiper-slide-active {
  opacity: 1;
}
.ctn3 {
  position: relative;
  background: #F7F9FB;
  overflow: hidden;
}
.ctn3 .ctn-list .swiper-container {
  overflow: initial;
}
.ctn3 .ctn-list .swiper-slide {
  height: auto;
  border-radius: 10px;
  background: #fff;
  padding: 60px 40px 40px;
}
.ctn3 .ctn-list .swiper-slide .icons {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ctn3 .ctn-list .swiper-slide .icons img {
  width: 18px;
}
.ctn3 .ctn-list .swiper-slide h2 {
  margin-top: 20px;
  height: 80px;
}
.ctn3 .ctn-list .swiper-slide h3 {
  margin-bottom: 20px;
}
.ctn3 .ctn-list .swiper-slide p {
  margin-bottom: 20px;
}
.ctn3 .ctn-list .swiper-slide ul li {
  position: relative;
  padding-left: 34px;
}
.ctn3 .ctn-list .swiper-slide ul li:before {
  content: '';
  width: 22px;
  height: 22px;
  background: url(../img/service/energy/dui_black.svg);
  background-size: contain;
  position: absolute;
  left: 0;
  top: 2px;
}
.ctn3 .ctn-list .swiper-slide ul li:not(:first-child) {
  margin-top: 20px;
}
.ctn3 .ctn-list .swiper-slide:hover .icons img {
  -webkit-animation: wobble 1s;
  animation: wobble 1s;
}
.ctn4 {
  position: relative;
  overflow: hidden;
}
.ctn4 .content {
  position: absolute;
  width: 100%;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  z-index: 2;
}
.ctn4 .content .left {
  width: 50%;
  color: #fff;
}
.ctn4 .content .left ul {
  margin-top: 60px;
}
.ctn4 .content .left ul li {
  position: relative;
  padding-left: 44px;
  margin-top: 50px;
}
.ctn4 .content .left ul li:before {
  content: '';
  width: 32px;
  height: 32px;
  background: url(../img/service/energy/dui_white.svg);
  background-size: contain;
  position: absolute;
  left: 0;
  top: 5px;
}
.ctn4 .content .left ul li p {
  margin-top: 10px;
}
.ctn4 .bg {
  position: relative;
  overflow: hidden;
}
.ctn4 .bg:before {
  content: '';
  display: block;
  padding-top: calc(900 / 1920 * 100%);
}
.ctn4 .bg:after {
  content: '';
  width: 50%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
}
.ctn4 .bg img {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  object-fit: cover;
}
.ctn5 {
  position: relative;
}
.ctn5 h2 {
  position: absolute;
  width: 100%;
  text-align: center;
  left: 0;
  bottom: 120px;
  color: #fff;
  z-index: 2;
  line-height: 1.5;
}
.ctn5 .tu {
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.ctn5 .tu:before {
  content: '';
  display: block;
  padding-top: calc(900 / 1920 * 100%);
}
.ctn5 .tu img {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  object-fit: cover;
}
@media screen and (max-width: 1680px) {
  .ctn1 .text {
    margin-top: 20px;
  }
  .ctn2 .middle .swiper-slide {
    width: 220px;
  }
  .ctn2 .middle .swiper-slide h2 {
    padding-top: 14px;
  }
  .ctn2 .bottom .swiper-slide ul li {
    padding: 8px 16px;
  }
  .ctn3 .ctn-list .swiper-slide {
    padding: 3vw 2vw 2vw;
  }
  .ctn3 .ctn-list .swiper-slide .icons {
    width: 44px;
    height: 44px;
  }
  .ctn3 .ctn-list .swiper-slide h2 {
    height: 70px;
  }
  .ctn3 .ctn-list .swiper-slide h3 {
    margin-bottom: 14px;
  }
  .ctn3 .ctn-list .swiper-slide p {
    margin-bottom: 14px;
  }
  .ctn3 .ctn-list .swiper-slide ul li {
    padding-left: 30px;
  }
  .ctn3 .ctn-list .swiper-slide ul li:before {
    width: 20px;
    height: 20px;
    top: 1px;
  }
  .ctn3 .ctn-list .swiper-slide ul li:not(:first-child) {
    margin-top: 14px;
  }
  .ctn4 .content .left ul {
    margin-top: 3vw;
  }
  .ctn4 .content .left ul li {
    margin-top: 2.5vw;
    padding-left: 38px;
  }
  .ctn4 .content .left ul li:before {
    width: 28px;
    height: 28px;
    top: 2px;
  }
  .ctn5 h2 {
    bottom: 6vw;
  }
}
@media screen and (max-width: 1200px) {
  .ctn2 .middle .swiper-slide {
    width: 200px;
  }
  .ctn2 .bottom {
    width: 60%;
  }
  .ctn4 .content .left ul li {
    padding-left: 34px;
  }
  .ctn4 .content .left ul li:before {
    width: 24px;
    height: 24px;
    top: 1px;
  }
  .ctn4 .content .left ul li h3 {
    font-size: 18px;
  }
}
@media screen and (max-width: 1024px) {
  .ctn2 .bottom {
    width: 70%;
  }
}
@media screen and (max-width: 768px) {
  .ctn1 .text {
    margin-top: 14px;
  }
  .ctn2 .middle .swiper-slide {
    width: auto;
    padding: 0 20px;
  }
  .ctn2 .bottom {
    width: 100%;
  }
  .ctn2 .bottom .swiper-slide ul li {
    padding: 4px 14px;
    margin: 2px;
    font-size: 12px;
  }
  .ctn3 .ctn-list .swiper-slide {
    padding: 20px;
  }
  .ctn3 .ctn-list .swiper-slide h2 {
    height: auto;
    margin-bottom: 20px;
  }
  .ctn4 {
    padding-top: 12vw;
  }
  .ctn4 .content {
    position: relative;
    top: 0;
    transform: translateY(0);
    -webkit-transform: translateY(0);
    -moz-transform: translateY(0);
    -ms-transform: translateY(0);
  }
  .ctn4 .content .left {
    width: 100%;
    color: #333;
  }
  .ctn4 .content .left ul {
    margin-top: 30px;
  }
  .ctn4 .content .left ul li {
    margin-top: 20px;
  }
  .ctn4 .content .left ul li:before {
    background-image: url(../img/service/energy/dui_black.svg);
  }
  .ctn4 .content .left ul li p {
    margin-top: 6px;
  }
  .ctn4 .bg {
    width: 90%;
    margin: 20px auto 0;
    border-radius: 10px;
  }
  .ctn4 .bg:after {
    display: none;
  }
  .ctn5 {
    padding: 12vw 0;
  }
  .ctn5 h2 {
    position: relative;
    color: #333;
    padding: 0 5%;
    font-size: 20px;
    font-weight: 600;
    bottom: 0;
  }
  .ctn5 .tu {
    width: 90%;
    margin: 20px auto 0;
    border-radius: 10px;
  }
}