.header {
  background: #000;
  height: 80px;
}
.wrap {
  max-width: 1280px;
  margin: 0 auto;
}
.header .logo {
  float: left;
  height: 60px;
  padding: 10px 0;
}
.header .logo a img {
  height: 60px;
}
.header h3 {
  float: left;
  font-size: 25px;
  line-height: 80px;
  color: #8d9095;
  margin-left: 200px;
}
.header h3 i {
  color: green;
  margin: 0 20px;
}
.header h5 {
  float: right;
  padding: 20px 0;
  cursor: pointer;
}
.banner {
  height: calc(100vh - 80px);
  position: relative;
}
.banner::before {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 1;
  background: rgba(0, 0, 0, 0.6);
}
.banner .text {
  position: absolute;
  right: 10%;
  top: 50%;
  transform: translateY(-50%);
  -ms-transform: translateY(-50%); /* IE 9 */
  -moz-transform: translateY(-50%); /* Firefox */
  -webkit-transform: translateY(-50%); /* Safari 和 Chrome */
  -o-transform: translateY(-50%);
  z-index: 11;
  text-align: center;
  width: 700px;
}
.banner .text h5 {
  font-size: 22px;
  line-height: 1.6;
  color: #c3c3c3;
  letter-spacing: 3px;
  margin: 40px 0 15px;
}
.banner .text ul {
  text-align: center;
  width: 500px;
  margin: 0 auto;
}
.banner .text li {
  display: inline-block;
  margin: 10px 5px;
}
.banner .text li a {
  display: block;
  width: 210px;
  line-height: 65px;
  background: #FFD700;
  font-size: 26px;
  color: #fff;
}
.banner .text li a i {
  padding-left: 40px;
  background: url(../images/c1.png) no-repeat left center;
  background-size: 30px auto;
  display: inline-block;
}
.banner .text li.a2 a i {
  background: url(../images/c2.png) no-repeat left center;
  background-size: 30px auto;
}
.banner .text li.a3 a i {
  background: url(../images/c3.png) no-repeat left center;
  background-size: 30px auto;
}
.banner .text li.a3 a, .banner .text li.a2 a {
  background: #00BFFF;
}
.banner .arrow {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 30px;
  z-index: 11;
  margin: 0 auto;
  background: url(../images/c4.png) no-repeat center/cover;
  width: 50px;
  height: 50px;
  cursor: pointer;
}
.arrow {
  -webkit-animation: bounce-up 1.5s linear infinite;
  animation: bounce-up 1.5s linear infinite;
  opacity: 1;
}
@-webkit-keyframes bounce-up {
  25% {
    -webkit-transform: translateY(10px);
  }
  50%, 100% {
    -webkit-transform: translateY(0);
  }
  75% {
    -webkit-transform: translateY(-10px);
  }
}
@keyframes bounce-up {
  25% {
    transform: translateY(10px);
  }
  50%, 100% {
    transform: translateY(0);
  }
  75% {
    transform: translateY(-10px);
  }
}
.section1 {
  padding: 70px 0;
  text-align: center;
}
.section1 h2 {
  font-size: 56px;
  line-height: 1.6;
  color: #333;
}
.section1 h3 {
  font-size: 20px;
  color: #666;
  margin-bottom: 25px;
}
.section1 .imgs {
  background: url(../images/c5.png) no-repeat center;
  width: 1000px;
  margin: 40px auto 0;
  height: 703px;
  overflow: hidden;
}
.section1 .imgs .video {
  width: 760px;
  height: 410px;
  object-fit: cover;
  margin: 40px auto;
}
.section2 li .wrap {
  overflow: hidden;
  max-width: initial;
  padding: 60px;
}
.section2 li:nth-child(2n + 1) {
  background: #f9f9f9;
}
.section2 li .imgs {
  float: left;
  width: 50%;
}
.section2 li .imgs img {
  display: block;
  max-width: 100%;
  width: 80%;
  margin: 0 auto;
}
.section2 li .text {
  float: right;
  width: 30%;
  margin: 0 10%;
}
.section2 li .text h3 {
  font-size: 40px;
  line-height: 1.3;
  color: #333;
  margin-bottom: 40px;
}
.section2 li .text h6 {
  font-size: 25px;
  line-height: 1.2;
  color: #999;
}
.section2 li:nth-child(2n) .text {
  float: left;
}
.section2 li:nth-child(2n) .imgs {
  float: right;
}
.section2 li:nth-child(2n) .text h3 {
  color: #3ea3ff;
}
.section3 {
  padding: 70px 0;
  background: #f9f9f9;
}
.section3 h2.h2 {
  font-size: 40px;
  line-height: 1.4;
  color: #333;
  text-align: center;
}
.section3 .del {
  font-size: 16px;
  line-height: 1.4;
  color: #494949;
  text-align: center;
  margin: 40px 0;
}
.section3 .ul {
  width: 1000px;
  margin: 0 auto;
}
.section3 .ul li {
  float: left;
  width: calc((100% - 26px)/3);
  margin-right: 12px;
  margin-bottom: 12px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  border: 1px solid rgba(204, 204, 204, 1);
}
.section3 .ul li:nth-child(3n) {
  margin-right: 0;
}
.section3 .ul li .icon {
  width: 80px;
  height: 80px;
  margin: 30px auto 10px;
  position: relative;
}
.section3 .ul li .icon img {
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  margin: 0 auto;
  z-index: 1;
  transition: all 0.3s;
  -ms-transition: all 0.3s; /* IE 9 */
  -moz-transition: all 0.3s; /* Firefox */
  -webkit-transition: all 0.3s; /* Safari 和 Chrome */
  -o-transition: all 0.3s;
  filter: grayscale(100%);
}
.section3 .ul li .icon .a2 {
  opacity: 0;
}
.section3 .ul li:hover .icon .a1 {
  opacity: 1;
  filter: grayscale(0%);
}
.section3 .ul li:hover .icon .a2 {
  opacity: 0;
}
.section3 .ul li:hover {
  border-color: rgba(97, 176, 255, 1);
  background: #fff;
  transition: all 0.3s;
  -ms-transition: all 0.3s; /* IE 9 */
  -moz-transition: all 0.3s; /* Firefox */
  -webkit-transition: all 0.3s; /* Safari 和 Chrome */
  -o-transition: all 0.3s;
}
.section3 .ul li:hover h6 {
  color: rgba(97, 176, 255, 1);
}
.section3 .ul li h6 {
  font-size: 15px;
  line-height: 1.6;
  color: #494949;
  text-align: center;
  margin-bottom: 30px;
  transition: all 0.3s;
  -ms-transition: all 0.3s; /* IE 9 */
  -moz-transition: all 0.3s; /* Firefox */
  -webkit-transition: all 0.3s; /* Safari 和 Chrome */
  -o-transition: all 0.3s;
}
.section4 {
  padding: 100px 0 80px;
}
.section4 .cents {
  background: rgba(0, 0, 0, 0.5);
  width: 1000px;
  margin: 0 auto;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  padding: 50px 70px;
  text-align: center;
}
.section4 .cents .h2 {
  font-size: 36px;
  line-height: 2;
  color: #ccc;
  position: relative;
}
.section4 .cents .h2::before {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: #ccc;
  width: 60px;
  margin: 0 auto;
}
.section4 .cents .dels {
  font-size: 18px;
  line-height: 1.8;
  color: #ccc;
  margin: 40px 0;
}
.mak {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 900;
  background: rgba(0, 0, 0, 0.5);
}
.mkcen {
  position: fixed;
  left: 0;
  right: 0;
  top: 50%;
  z-index: 900;
  transform: translateY(-50%);
  -ms-transform: translateY(-50%); /* IE 9 */
  -moz-transform: translateY(-50%); /* Firefox */
  -webkit-transform: translateY(-50%); /* Safari 和 Chrome */
  -o-transform: translateY(-50%);
  width: 800px;
  margin: 0 auto;
  background: #1d1f25;
}
.mkcen .h2 {
  font-size: 30px;
  line-height: 29px;
  border-bottom: 1px solid #44474e;
  text-align: center;
  color: #FFF;
  padding: 15px;
}
.mkcen .dels {
  padding: 0 35px 4px;
  font-size: 16px;
  color: #fff;
  text-align: center;
  margin-top: 40px;
  line-height: 1.8rem;
}
.mkcen .bt {
  text-align: center;
  background: #fff;
  padding: 10px 0;
  overflow: hidden;
  margin-top: 20px;
}
.mkcen .bt i {
  font-size: 15px;
  display: inline-block;
  height: 28px;
  line-height: 28px;
  padding: 0 15px;
  background-color: #444;
  color: #FFF;
  border-radius: 2px;
  font-weight: 400;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
  -ms-transition: all 0.3s; /* IE 9 */
  -moz-transition: all 0.3s; /* Firefox */
  -webkit-transition: all 0.3s; /* Safari 和 Chrome */
  -o-transition: all 0.3s;
}
.mkcen .bt i:hover {
  color: #fff;
  background: #00BFFF;
}
.mkcen.mkrt {
  left: auto;
  top: 0;
  right: -340px;
  bottom: 0;
  width: 340px;
  background: #fff;
  transform: translateY(-0%);
  -ms-transform: translateY(-0%); /* IE 9 */
  -moz-transform: translateY(-0%); /* Firefox */
  -webkit-transform: translateY(-0%); /* Safari 和 Chrome */
  -o-transform: translateY(-0%);
  transition: all 0.3s;
  -ms-transition: all 0.3s; /* IE 9 */
  -moz-transition: all 0.3s; /* Firefox */
  -webkit-transition: all 0.3s; /* Safari 和 Chrome */
  -o-transition: all 0.3s;
}
.mkcen.mkrt .h2 {
  background: #191919;
}
.mkcen.mkrt .dels {
  color: #666;
  text-align: left;
  border-bottom: 1px solid #999;
  padding: 40px;
}
.mkcen.mkrt.on {
  right: 0;
}
.banner .text h6 {
  text-align: center;
}
.banner .text h6 i {
  display: inline-block;
  padding: 0 20px;
  font-size: 24px;
  color: #fff;
  background: #00BFFF;
  border-radius: 10px;
  line-height: 68px;
  display: none;
}