/* 默认样式重置 */
*:focus { outline:none; }
body,h1,h2,h3,ul,ol,li,div,p,a{
  padding:0;
  margin:0;
  font-size: 12px;
  box-sizing: border-box;
}
body, .zoom{
  zoom: 1;
}
ul,ol,li{ 
  list-style:none; 
}
img , a img , :link img , :visited img {
  border:none; 
  vertical-align:middle;
}
a{
  text-decoration:none; 
  cursor:pointer; 
  color:#000; 
  outline:none; 
}
a:link , :visited, a:hover { 
  text-decoration: none; 
  cursor:pointer; 
}
/* 公共样式 */
.f16{ font-size: 16px; }
.f18{ font-size: 18px; }
.f36{ font-size: 36px; }
.f48{ font-size: 2.5vw; }
.f72{ font-size: 72px; }
.f80{ font-size: 80px; }
.bold{ font-weight: bold; }
.color_f{ color:#fff; }
.text_center{ text-align:center; }
.flex{ display:flex; }
.flex--c{ display:flex; align-items:center; }
.pr{ position:relative; }
@font-face{
	font-family:DIN;
	font-style:normal;
	src:url('DIN-Medium.otf');
}
@font-face {
	font-family:youshe;
	src: url('YouSheBiaoTiHei-2.ttf');
}
.DIN{ font-family:DIN; }
.youshe{ font-family: youshe; }

/* PC端css */
.header{
  position: fixed;
  top: 0;
  width: 100%;
  height: 80px;
  line-height: 80px;
  background: rgba(0,0,0,.3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 5.208vw;
  z-index: 1;
}
.logo{
  width: 8.333vw;
  /* height: 2.656vw;  */
  margin-right: 5.208vw;
}
.header ul{ 
  gap:0 2.604vw; 
}
.header li{
  color:#fff;
  font-size:16px;
  font-weight:bold;
  height: 80px;
  position: relative;
  cursor: pointer;
}
.header li.active:after{
  content:'';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 2px;
  background-color: #E72030;
}
.header li a{
  color:#fff;
  font-size:16px;
  font-weight:bold;
}
.img_tel{
  width: 18px;
  height: 18px;
}
.part1:before,
.part2:before, 
.part3:before, 
.part4:before, 
.part5:before,
.part6:before{
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,.5);
}
.part1 p{
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  z-index: 1;
  white-space: nowrap;
  font-size: 4.167vw;
}
.part2{
  background: url(bg_2.jpg) no-repeat top center/cover;
  padding: 86px 200px 8.33vw;
  margin-top: -3px; /*video标签和下边的标签有个缝隙，这个样式为了去掉缝隙*/
}
.part2 *, 
.part3 *, 
.part4 *, 
.part5 *,
.part6 *,
.footer *{ 
  position:relative; 
  color:#fff; 
}
.part_title{
  font-size: 48px;
  font-size: 2.5vw;
  font-weight: bold;
  text-align: center;
  margin-bottom: 10.416vw;
}
.part2 .f36{
  margin-bottom: 26px;
}
.part2 div.f16{
  width: 957px;
  margin:16px 0;
  line-height: 2;
}
.part2 .flex{
  gap: 0 5.2vw;
}
.part2 .DIN{
  font-size: 3.75vw;
  font-weight: bold;
  margin-bottom: 5px;
}
.part3{
  background: url(bg_3.jpg) no-repeat top center/cover;
  padding: 6vw calc((100vw - 1320px) / 2) 11.1458vw;
}
.part3 .flex{ 
  gap:0 24px;
}
.part3 .flex>div{
  text-align: center;
  width: 200px;
  height: 600px;
  background: rgba(0,0,0,.5);
  padding: 40px 20px 20px;
}
.part3 .flex>div:hover{
  top: -40px;
  background: rgba(231, 32, 48, .3);
}
.part3 .flex .t{
  font-size: 28px;
  margin-top: 32px;
  margin-bottom: 46px;
}
.part3 .flex .img{
  width: 56px;
  height: 56px;
  background: rgba(0,0,0,.5);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto 136px;
}
.part3 .flex img{
  width: 26px;
  height: 22px;
}
.part3 .flex .img:nth-child(2) img{ 
  width: 27px; 
  height: 25px; 
}
.part3 .flex .img:nth-child(3) img{ 
  width: 23px; 
  height: 24px; 
}
.part3 .flex .img:nth-child(4) img{ 
  width: 25px; 
  height: 25px; 
}
.part3 .flex .img:nth-child(5) img{ 
  width: 25px; 
  height: 26px; 
}
.part3 .flex .img:nth-child(6) img{ 
  width: 26px; 
  height: 25px; 
}
.part3 .flex .f18{
  line-height: 2;
}
.part4{
  background: url(bg_4.jpg) no-repeat top center/cover;
  padding: 11.739vw 0 12.864vw; 
}
.part4 img{
  width: 100%;
}
.part5{
  background: url(bg_5.jpg) no-repeat top center/cover;
  padding: 6.25vw 0 9.375vw;
}
/* .part5 .part_title{ margin: 0; } */
.part5 .container{
  max-width: 100%;
}
.part5 .mk-carousel{
  height: 520px;
  overflow: hidden;
  position: relative;
  z-index: 999;
  font-size: 0;
  text-align: left;
  --w: 600px;
  --h: 400px;
}
.part5 .mk-carousel>img{
  width: var(--w);
  height: var(--h);
  position: relative;
  left: 50%;
  top: 11%;
  /* margin-top: -200px; */
  opacity: 0.7;
  cursor: pointer;
  -moz-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  -moz-transform: perspective(200px) rotateY(-10deg);
  -ms-transform: perspective(200px) rotateY(-20deg);
  -webkit-transform: perspective(200px) rotateY(-20deg);
  transform: perspective(200px) rotateY(-20deg);
  /* -webkit-box-reflect: below 0 -webkit-gradient(linear, left top, left bottom, from(transparent), color-stop(0.5, transparent), to(rgba(0, 0, 0, 0.5))); */
}
.part5 .mk-carousel>img.image-left{
  -moz-transform: perspective(200px) rotateY(20deg);
  -ms-transform: perspective(200px) rotateY(20deg);
  -webkit-transform: perspective(200px) rotateY(20deg);
  transform: perspective(200px) rotateY(20deg);
}
.part5 .mk-carousel>img.active{
  z-index: 2;
  opacity: 1;
  -moz-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  -moz-transform: rotateY(0deg) scale(1.3);
  -ms-transform: rotateY(0deg) scale(1.3);
  -webkit-transform: rotateY(0deg) scale(1.3);
  transform: rotateY(0deg) scale(1.3);
}
.part5 .mk-carousel>img.image-right{
  -moz-transform: perspective(200px) rotateY(20deg);
  -ms-transform: perspective(200px) rotateY(20deg);
  -webkit-transform: perspective(200px) rotateY(20deg);
  transform: perspective(200px) rotateY(-20deg);
}
.part5 .mk-carousel>img.active+img+img{
  margin-left: 100% !important;
}
.part5 .mk-carousel ul{
  position: absolute;
  width: 100%;
  height: 100%;
  --width:74px;
}
.part5 .mk-carousel li{
  position: absolute;
  top: calc(50% - 37px);
  left: calc(50% - 490px);
}
.part5 .mk-carousel li:nth-child(2){
  left: auto;
  right: calc(50% - 490px);
}
.part5 .mk-carousel li img{
  width: var(--width);
  height: var(--width);
}
.part6{
  background: url(bg_6.jpg) no-repeat top center/cover;
  padding: 5.2vw 0 8.333vw;
}
.part6>div{
  width: 980px;
  margin: -69px auto 0;
}
.part6 .f72{ 
  margin-bottom: 3.75vw; 
  font-size: 3.75vw; 
}
.part6 .f72 img{ 
  width: 3vw; 
  margin-right: 2vw; 
}
.part6 .f48 img{ 
  width: 2vw; 
  margin-right: 1.3vw; 
}
.footer{
  background: #222;
  padding: 42px 100px 50px;
}
.footer .flex{
  justify-content: center;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.5);
}
.footer .flex>img{
  width: 198px;
  filter: brightness(10);
  margin-right: 24px;
}
.footer .flex>div{
  border-left: 1px solid rgba(255,255,255,.5);
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px 0;
}
.footer .flex>div img{
  width: 22px;
  margin-right: 10px;
}
.footer>.text_center{
  margin: 36px 0; 
}

/* 其他尺寸 以及 移动端的 css */
@media only screen and (max-width: 1368px) {
  .part2{
    padding-left: 10vw;
    padding-right: 10vw;
  }
  .part2 div.f16{
    width: 100%;
  }
  .part3{ 
    padding-left:0; 
    padding-right:0; 
  }
  .part3 .flex{
    gap: 20px;
    justify-content: center;
  }
  .part3 .flex>div{
    width: calc(16.66vw - 20px);
  }
  .part5 .mk-carousel>img{
    width: 540px;
    height: 360px;
  }
  .part5 .mk-carousel li{ 
    left: calc(50% - 445px); 
  }
  .part5 .mk-carousel li:nth-child(2){ 
    right: calc(50% - 445px); 
  }
}
@media only screen and (max-width: 1024px) {
  .part2 .f36{
    font-size: 22px;
    font-weight: bold;
  }
  .part3{
    padding-left: 10vw;
    padding-right: 10vw;
  }
  .part3 .flex{
    flex-wrap: wrap;
    gap: 1.25vw 2.15vw;
  }
  .part3 .flex>div{
    width: 30%;
    height: 40vw;
  }
  .part3 .flex>div:hover{ 
    top: 0; 
    background: rgba(0,0,0,.5); 
  }
  .part3 .flex .t{
    font-size: 22px;
    margin-top: 1.66vw;
    margin-bottom: 2.4vw;
  }
  .part3 .flex .img{
    margin-bottom: 7vw;
  }
  .part5 .mk-carousel>img{
    width: 450px;
    height: 300px;
  }
  .part5 .mk-carousel li{
    left: calc(50% - 380px);
    top: calc(50% - 100px);
  }
  .part5 .mk-carousel li:nth-child(2){
    right: calc(50% - 380px);
  }
  .part6 .f72, 
  .part6 .f48{
    transform: scale(0.8);
  }
}
@media only screen and (max-width: 932px) {
  .part1 p{ 
    font-size: 50px; 
  }
  .part2, .part3{
    padding-left: 6vw;
    padding-right: 6vw;
  }
  .part2 .flex{ 
    gap: 0 8.2vw; 
  }
  .part2 .DIN{ 
    font-size: 60px; 
  }
  .part3, .part5{ 
    padding-top: 6.25vw; 
  }
  .part3 .flex{ 
    gap: 2.25vw; 
  }
  .part3 .flex>div{ 
    height: 50vw; 
  }
  .part4{ 
    overflow: hidden; 
  }
  .part4 img{ 
    transform: scale(1.2); 
  }
  .part5{ 
    padding-bottom: 0; 
  }
  .part5 .mk-carousel ul{ 
    --width: 6vw; 
  }
  .part5 .mk-carousel li{ 
    left: calc(50% - 317px); 
  }
  .part5 .mk-carousel li:nth-child(2){ 
    right: calc(50% - 317px); 
  }
  .part5 .mk-carousel>img{
    width: 370px;
    height: 250px;
  }
  .part6{ 
    padding-bottom: 8.33vw; 
  }
  .part6>div{ 
    width: 100%; 
  }
  .part6 .f72{ 
    margin: 0; 
  }
  .footer{ 
    padding: 42px 4vw; 
  }
  .footer .flex>img{ 
    width: 170px; 
  }
  .footer .f18{ 
    font-size: 16px; 
  }
  .footer .flex>div img{ 
    width: 20px; 
  }
}
@media only screen and (max-width: 768px) {
  .f18{ 
    font-size: 14px; 
  }
  .f36{ 
    font-size: 1.875vw; 
  }
  .f72{ 
    font-size: 3.75vw; 
  }
  .header{ 
    position:relative; 
  }
  .header .flex--c{ 
    flex: 1; 
    justify-content: center; 
  }
  .logo{ 
    width: 22vw; 
    margin: 0; 
  }
  .header ul{ 
    display: none; 
  }
  .header .f16{ 
    font-size: 12px; 
  }
  .part1{ 
    margin-top: -80px; 
  }
  .part1 p{ 
    font-size: 7vw; 
  }
  .part2{ 
    padding-top: 4.48vw; 
  }
  .part_title{ 
    font-size: 28px; 
  }
  .part2 .DIN{ 
    font-size: 52px; 
  }
  .part3 .flex .t{ 
    font-size: 20px; 
  }
  .part5 .mk-carousel{ 
    height: 410px; 
  }
  .part5 .mk-carousel>img{
    width: 300px;
    height: 210px;
  }
  .part5 .mk-carousel li{ 
    left: calc(50% - 244px);
  }
  .part5 .mk-carousel li:nth-child(2){ 
    right: calc(50% - 244px); 
  }
  .part6>div{
    margin: 0 4vw;
    width: 92vw;
  }
  .part6 .f72, .part6 .f48{ 
    transform: scale(1); 
  }
  .part6 .f72{ 
    margin-bottom: 1em; 
  }
  .part6 .f72 img{
    width: 3.75vw;
    margin-right: 1.5vw;
  }
  .part6 .f48 img{
    width: 3vw;
    margin-right: 1vw;
  }
}
@media only screen and (max-width: 540px) {
  .f48{ 
    font-size: 16px; 
  }
  .header{ 
    height: 10.66vw; 
  }
  .part1{ 
    margin-top: -10.66vw; 
  }
  .part_title{
    font-size: 22px; 
    margin-bottom: 6vw; 
  }
  .part2{ 
    padding-top: 6vw; 
  }
  .part2 .f36{ 
    font-size: 18px; 
  }
  .part2 div.f16,
  .part3 .flex .f18{ 
    line-height: 1.8; 
  }
  .part2 .DIN{ 
    font-size: 38px; 
  }
  .part3 .flex{ 
    gap: 38px 2.25vw; 
    margin-top: 45px; 
  }
  .part3 .flex p:nth-child(1){ 
    display: none; 
  }
  .part3 .flex .t{ 
    font-size: 18px; 
    margin-bottom: 5vw; 
  }
  .part3 .flex .img{ 
    position: absolute;
    left: 50%;
    top: 0;
    transform: translate(-50%, -50%);
  }
  .part3 .flex>div{ 
    width: 31%; 
    height: auto; 
    padding: 7vw 1.5vw 2vw; 
  }
  .part5 .mk-carousel ul{ 
    --width: 7vw; 
  }
  .part5 .mk-carousel li{ 
    left: 50%; 
    top: 0%; 
    transform: translateX(-150%); 
  }
  .part5 .mk-carousel li:nth-child(2){ 
    right: 50%; 
    transform: translateX(150%); 
  }
  .part5 .mk-carousel>img{ 
    width:70vw; 
    height: auto; 
    margin-top: 7vw; 
  }
  .part5 .mk-carousel>img.active+img{ 
    margin-left: 100% !important; 
  }
  .footer{ 
    padding: 7vw 4vw; 
  }
  .footer .flex{ 
    flex-direction:column; 
    align-items: center; 
  }
  .footer .flex>img{ 
    margin-right: 0; 
    margin-bottom: 3vw; 
  }
  .footer .flex>div{ 
    border:none; 
    padding-left:0; 
  }
  .footer .f18{ 
    text-align: center; 
  }
} 
@media only screen and (max-width: 430px) {
  .part3 .flex{ 
    justify-content: space-between; 
  }
  .part3 .flex>div{ 
    width: calc(50% - 2vw); 
    padding-bottom: 4vw; 
  }
  .part4 img{ 
    transform: scale(1.4);
    margin-top: 30px;
  }
}
@media only screen and (max-width: 375px) {
  .part_title{ 
    font-size: 18px; 
  }
  .part2 .f36{ 
    font-size: 14px; 
  }
  .part2 .DIN{ 
    font-size: 34px; 
  }
  .part2 div.f16{ 
    font-size: 12px; 
  }
}