.el-carousel__item h3 {
    color: #475669;
    font-size: 14px;
    opacity: 0.75;
    line-height: 300px;
    margin: 0;
  }
  
  .el-carousel__item:nth-child(2n) {
    background-color: #99a9bf;
  }
  
  .el-carousel__item:nth-child(2n+1) {
    background-color: #d3dce6;
  }

  *{
      padding: 0;
      margin: 0;
  }
html,body{
     position: relative;
     height: 100%;
     width: 100%;
 }
 h1{
    text-align: center;
    font-size: 44px;
    color: black;
    font-weight: lighter;
 }
 h2{
     text-align: center;
     font-size: 44px;
     color: cadetblue;
 }
 h4{
     text-align: center;
     margin-top: 16px;
     font-size: 20px;
     color: gray;
 }
 a{
     text-decoration: none;
     margin-left: 14px;
 }
 .imags{
      width: 1920px;
      height: 100%;
      position: absolute;
      left: 50%;
      transform: translate(-50%);
 }
 #app{
     position: relative;
     height: 100%;
     width: 100%;
     bottom: 0;
 }
 .ul_main{
    list-style: none;  
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    width: 90%;
    margin-top: 30px;
    text-align: center;
}
.ul_main>li{
    width: 220px;
    display: inline-block;
    font-size: 14px;
    color: gray;
    text-align: center;
    margin-top: 16px;
}
.ul_main>li>p{
    color: cadetblue;
    text-align: center;
    font-size: 20px;
}

.ul_frist_main{
    list-style: none;  
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    width: 100%;
    margin-top: 30px;
    text-align: center;
}
.ul_frist_main>li{
    width: 180px;
    display: inline-block;
    font-size: 18px;
    border: 1px solid gray;
    color: gray;
    text-align: center;
    border-radius: 4px;
    margin: 10px 10px;
    padding: 20px 20px;
    cursor: pointer;
}
  /*头部*/
  .header{
      height: 100px;
      background-color: black;
      opacity: 0.8;
  }
  .header_out{
      position: absolute;
      left: 50%;
      transform: translate(-50%);
      height: 80px;
      width: 80%;
      margin-top: 15px;
  }
  .header_name{
      font-size: 14px;
      color: white;
  }

  /*文案一*/
  .body_one{
      width: 100%;
      height: 500px;
      background-image: url('./img/bg_feature.jpeg');
  }

  /*文案二*/
  .body_frist{
    width: 100%;
    height: 500px;
  }

  .body_frist_main{
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    height: 400px;
    width: 82%;
    margin-top: 30px;
  }
.body_one_main{
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    height: 400px;
    width: 82%;
    margin-top: 30px;
}

  /*尾部*/
  .footer{
      border-top: 1px solid gray;
      position: relative;
      width: 100%;
      bottom: 0;
      height: 150px;
      background-color: white;
  }
  .footer_main{
      position: absolute;
      left: 50%;
      transform: translate(-50%);
      height: 80px;
      width: 1000px;
      margin-top: 30px;
    }
  .footer_main_title{
      color: black;
      font-size: 16px;
      font-weight: 500;
      cursor: pointer;
      margin: 0 auto;
  }
  .footer_main_main{
      color: gray;
      font-size: 14px;
      margin-top: 10px;
  }