.main{
    width: 1200px;
    margin: 0 auto;
}
.clearfix:after{
    display:block;
    clear:both;
    content:"";
    visibility:hidden;
    height:0}
.clearfix{zoom:1}
.vadio{
    width: 1100px;
    margin-left: 50px;
    position: relative;
}
.shipin{
    width: 1100px;
    margin：0 auto；
    height: 400px;
    padding-top: 20px;
}

.vadio .kc-img{
float: left;
}
.vadio .kc-img img{
    width: 450px;
    height:300px;
}
.vadio  .kcjs{
    position: absolute;
    width: 500px;
    top: 0px;
    left: 480px;
    padding:10px;
    height: 300px;
    overflow:hidden;
}

h3{
    text-align: center;
}

.class-item {
    width: 1140px;
   margin-left: 10px;
    
   
}

.class-item  li{
  list-style: none;
    float: left;
    width: 23.5%;
    margin-right: 2%;
    margin-top: 20px;
}
.class-item  li:nth-child(4n){
    margin-right: 0px;
}
.class-item  li a{
   color:#444;
    font-size: 12px;
    position: relative;
    display: block;
    width: 100%;
    background: #f2f2f2;
}

.class-item  li img{
    display: block;
    
    width: 100%;
    height: 162px;
}
.class-item .wz{
   
    bottom: 0px;
    left: 20px;
}
.class-item h3{
    text-align: left;
    font-size: 14px;
}
.xg-class-item {
    width: 1140px;
    margin-left: 10px;
   
}
.xg-class-item ul{
    width: 100%;
}
.xg-class-item ul li{
    list-style: none;
    float: left;
    width: 23.5%;
   margin-right: 2%;
    margin-top: 20px;
}
.xg-class-item ul li:nth-child(4n){
    margin-right: 0px;
}
.xg-class-item ul li a{
    color: #444;
    font-size: 12px;
    position: relative;
    display: block;
    width: 100%;
    background: #f2f2f2;
}

.xg-class-item ul li img{
    display: block;
    width: 100%;
    height: 162px;
}
.xg-class-item .wz{
    /*position: absolute;*/
    bottom: 0px;
    left: 20px;
    height: 50px;
    overflow:hidden;
}
.xg-class-item .wz p{
    line-height: 50px;
}
.xg-class-item h3{
    text-align: left;
    font-size: 14px;
}
.js-img{
    width: 1140px;
    margin-left: 10px;
    margin-top: 30px;
}
.js-img img{
    width: 1100px;
    height: auto;
   margin-left:40px ;
}
.task{
    position: absolute;
    z-index:99999999999;
    left: 0;
    top: 90px;
    width: 100%;
   height: 100%;
    background: #000;
    opacity: 0.9;
    text-align: center;
    cursor: pointer;
    display: none;
}
.sj-shipin{
    display: none;
}
.sj-nav ul{
    padding: 0px;
}
.sj-nav ul li{
    list-style: none;
}
@media screen and (max-width:1200px){
    .main{
        width: 90%;
        margin:0 auto;
    }
.shipin{
    display: none;
}
.sj-shipin{
    display: block;
    width: 90%;
    margin:0px auto;
}
.sj-shipin a img{
    width: 100%;
    height: 200px;
}
    .class-item  li{
      list-style: none;
        float: left;
        width: 48%;
        margin-right: 2%;
        margin-top: 20px;
    }
  

.xg-class-item ul li img{
    height: 120px;
}


.class-item li img{
    height: 120px;
}
    .xg-class-item ul{
        padding: 0px;
    }
    .xg-class-item ul li{
        list-style: none;
        float: left;
        width: 48%;
       margin-right: 2%;
        margin-top: 20px;
    }
    .js-img{
        width: 100%;
     
        margin-top: 30px;
    }
    .js-img img{
        width: 100%;
        height: auto;
        margin-left: 0px;
       
    }
    .class-item {
    width: 100%;
   margin-left: 10px;
   padding-left:0px;
   
}

.class-item  li{
  list-style: none;
    float: left;
    width: 48%;
    margin-right: 2%;
    margin-top: 20px;
}
.xg-class-item {
    width: 100%;
    margin-left: 10px;
   
}

}
.start{
    width: 120px;
    height:36px;
    line-height: 36px;
    border:1px solid #eee;
    border-radius: 10px;
    outline:none;
    position:absolute;
    bottom: 10px;
    right: 20px;
    display: block;
    text-align: center;
    background-color:#009fec;
    color:#fff;
    
}