body{
  padding: 0px;
  margin: 0px;
}
*{
  font-family: NotoSansHans,Microsoft YaHei,-apple-system-font,Helvetica Neue,sans-serif,Arial,NotoSansHansThin;
}
.container_ey {
    font-family: 'SourceHanSansCN-Light';
  }
  .part1{
    width: 100%;
    /* max-height: 1014px; */
    overflow: hidden;
  }
  .part1 img {
    width: 100%;
  }
  .part1 .part1_content{
    width: 100%;
    position: relative;
  }
  .part1 .part1_content p{
    font-size: 32px;
    width: 100%;
    margin-bottom: 0;
  }
  .part1 .part1-title {
    position: absolute;
    top: 20%;
    top: 0px;
    right: -5%;
    bottom: 0px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .part1 .part1-title img {
    width: 532px;
    /* margin-right: 300px; */
  }
  @media screen and (min-width: 2000px){
    .part3-left{
      width: 800px !important;
    }
    .part3-right{
      width: 880px !important;
    }
    .part1 .part1-title img {
      width: 732px !important;
    }
    .part2-title   img{
      width: 1080px;
    }
    .main-bottom div{
      margin-bottom: 0px;
    }

    .img-bottom {
      position: absolute;
      left: 700px;
    }
  }
  @media screen and (max-width: 1600px){
    .part1 .part1-title img {
      width: 430px;
      /* margin-right: 240px; */
    }
    .part1 .part1-title {
      /* top:300px; */
    }
    .part3-left{
      width: 500px!important;
    }
    .part3-right{
      width: 50rem !important;
    }
    .main-bottom img{
      height: 18rem !important;
    }
    .img-bottom{
      right: 450px!important;
    }
  }
  .img-bottom{
    position: absolute;
    left: 650px;
    bottom: 200px;
  }
  .part1 .part1-tip {
    position: absolute;
    bottom: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .part1 .part1-tip img {
    width: 325px;
  }
  .part2{
    width: 100%;
    max-height: 1013px;
    margin: 0 auto;
    background: #fff;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    flex-direction: column;
    position: relative;
    z-index: -1;
  }
  .part2-right{
    position: absolute;
    right: 0px;
    bottom: 0px;
  }
  .part2-right img{
    width: 462px;
    height:470px;
  }
  .part2 .part2-title {
    /* position: absolute;
    width: 100%;
    top: 110px;
    left:0; */
    display: flex;
    /* align-items: center; */
    /* justify-content: center; */
    margin-top: 280px;
  }
  .part2 .details {
    /* position: absolute;
    top: 270px;
    left:0;
    width: 100%; */
  }
  .part2 p {
    width: 100%;
    text-align: center;
    font-size: 16px;
    line-height: 35px;
  }
  .part2 .part2-tip {
    font-size: 12px;
    position: absolute;
    bottom: 36px;
    width: 400px;
    right: 10%;
  }
  .part2 .main {
    min-width: 1200px;
    max-width: 1366px;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: 0 auto;
  }
  .part3{
    position: relative;
  }
  .part3 .main{
    min-width: 1366px;
      max-width: 1920px;
      max-height: 3622px;
      position: absolute;
      left: 0;
      right: 0;
      top: 0;
      bottom: 0;
      margin: auto;
  }

  .part3 .main  .main-top {
    height: 50%;
    padding-top: 100px;
    display: flex;
    justify-content: space-around;
  }
  .part3 .main  .main-bottom {
    height: 50%;
  }
  .main-bottom div{
    margin-bottom: 30px;
  }
 
  .part3 .main .img1 {
    width: 486px;
    margin-top: 120px;
    margin-bottom: 88px;
  }
  
  .part3 .main .img2 {
    width: 239px;
  }
  @media screen and (max-width: 1600px){
    .part3 .main .img1 {
      /* width: 330px;
      margin-top: 100px;
      margin-bottom: 80px; */
    }
    .part3 .main .img2 {
      width: 180px;
    }
    .part2-title   img{
      max-width: 666px!important;
    }
  }
  .step{
    margin-top: 70px;
    position: relative;
  }
  .step img {
    width: 100%;
  }
  .part3 .content {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    position: absolute;
    top: 70px;
    left: 100px;
    right: 51px;
}
.part3 .part3-content {
  width: 50%;
  height: 140px;
  display: flex;
  align-items: flex-start;
  margin-bottom: 30px;
}

.content .img-left{
  width: 69px;
  height: 89px;
}
.content .img-right{
  width: 74px;
  height: 89px;
}
.img-title {
  margin-bottom: 20px;
  font-weight: 700;
  padding-top: 35px;
}
.img-title img{
  width: 100%;
  height: 35px;
 
}
  

.part3 .part3-content .title {
  width: 346px;
  font-size: 20px;
  color: #6BC5EF;
  line-height: 30px;
  margin-bottom: 20px;
  font-weight: 700;
  padding-top: 35px;
}

.title-yellow{
  color:rgb(245,194,89)!important;

}


.part3 .part3-content span {
  display: block;
  font-size: 14px;
  line-height: 20px;
}

.part3 .part3-tip {
  position: absolute;
  font-size: 12px;
  position: absolute;
  bottom: -40px;
  left: 150px;
  font-size: 12px;
}

@media screen and (max-width: 1600px){
  .part3 .part3-tip {
    /* position: absolute;
    bottom: 58px;
    left: 300px;
    font-size: 12px; */
  }
}
/* 
.part4 {
  min-width: 1200px;
  height: 1511px;;
  overflow: hidden;
  margin: 0 auto;
  background: url(/resource/teen/img/part4-bg.png) no-repeat center/cover;
} */

.part4 .title1 {
  font-family: 'Special-Font';
  font-size: 42px;
  color: #6BC5EF;
  text-align: center;
  padding-top: 150px;
}

.part4 .title1{
  font-family: 'Special-Font';
  font-size: 42px;
  color: #6BC5EF;
  text-align: center;
  padding-top: 150px;
}
.part4 .teeth_imgs{
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  margin-bottom: 55px;
}
.part4 .teeth_imgs li{
  display: flex;
  align-items: center;
  margin-top: 80px;
  flex: 1;
  width: 100px;
  margin-right: 50px;
}
.part4 .teeth_imgs li .showImg{
  width: 171px;
  height: 171px;
}
.part4 .teeth_imgs li .showImg img{
  /* width: 100%; */
  height: 100%;
}
.part4 .teeth_imgs li .tip{
  flex: 1;
  margin-left: 20px;
  height: 100%;
  padding-top: 35px;
}
.part4 .teeth_imgs li .tip .p1_title{
  font-family: 'SourceHanSansCN-Bold';
  margin-bottom: 10px;
  font-size: 20px;
  color: #f27474;
  font-weight: 700;
}
.part4 .teeth_imgs li .tip p{
  font-size: 16px;
  color: #595757;
  line-height: 30px;
}
.part4 .title2{
  font-family: 'Special-Font';
  font-size: 42px;
  color: #6BC5EF;
  text-align: center;
  margin-top: 120px;
}
.part4 .title2_s{
  font-size: 24px;
  color: #231815;
  text-align: center;
  margin-top: 20px;
}
.part4 .heads{
  width: 100%;
  display: flex;
  margin-top: 100px;
}
.part4 .heads li{
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  position: relative;
}
.part4 .heads li .lines{
  position: absolute;
  top: 50%;
  right: -3.5px;
  transform: translateY(-50%);
  height: 300px;
  width: 7px;
  background: url(/resource/teen/img/lines.png) no-repeat center/contain;
}
.part4 .heads li .img{
  width: 224px;
  height: 274px;
}
.part4 .heads li .img img{
  width: 100%;
  height: 100%;
}
.part4 .heads li p{
  font-size: 18px;
  color: #231815;
  text-align: center;
}
.part4 .heads li .p1_title{
  font-size: 20px;
  color: #6BC5EF;
  text-align: center;
  margin-top: 20px;
  margin-bottom: 8px;
}
.part4 .heads li .bottom_part{
  margin-top: 70px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-around;
}
.part4 .heads li .bottom_part .teeth_show{
  display: flex;
  flex-direction: column;
  align-items: center;
}
.part4 .heads li .bottom_part .teeth_show img{
  width: 140px;
  height: 50px;
}
.part4 .heads li .bottom_part .teeth_show span{
  font-size: 16px;
  color: #585858;
  margin-top: 20px;
}

.part4 .part4_bottom{
  width: 100%;
  margin-top: 80px;
  display: flex;
  align-items: flex-end;
}
.part4 .part4_bottom .introduce{
  flex: 1;
}

.part4 .part4_bottom .introduce p {
  font-size: 16px;
  line-height: 32px;
  color: #595757;
  margin-top: 60px;
  margin-bottom: 50px;
}
.part4 .part4_bottom .introduce .imgs{
  display: flex;
  justify-content: space-between;
}
.part4 .part4_bottom .introduce .imgs .label{
  width: 122px;
  height: 122px;
}
.part4 .part4_bottom .introduce .imgs .label img{
  width: 100%;
  height: 100%;
}
.part4 .part4_bottom .gif{
  width: 530px;
  height: 400px;
  margin-left: 30px;
}
.part4 .part4_bottom .gif img{
  width: 100%;
  height: 100%;
}
.tooth-ul{
  max-width: 1400px;
  min-width: 1200px;
  margin: 0 auto;
}



.part4 {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 1511px;/*要显示的高度*/
}
.part4 .img-bg {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1920px;/*图片的宽*/
  height: 1511px;/*高*/
  margin-left: -960px;/*此值为图片宽度的一半*/
}

.main-left {
  position: absolute;
    top: -382px;
    left: 0px;
}

.main-left img{
  width:513px;
}
.main-right {
  position: absolute;
  top: 196px;
  right: 0px;
}

.main-right img{
  width:647px;
}
.main-footer {
  position: absolute;
  left: 59px;
  bottom: 35px;
}

.main-footer img{
  width:643px;
}

.part1-main-footer {
  position: absolute;
  right: 0px;
  z-index: 11111;
  top: 0px;
}

.part1-main-footer img {
  width: 913px;
}