@media screen and (max-width:1920px){
   
}
@media screen and (max-width:1680px){
  
}
@media screen and (max-width:1440px){
   
}
@media screen and (max-width:1280px){
   
}
@media screen and (max-width:1080px){
   
}
@media screen and (max-width:1024px){
    
}
@media screen and (max-width:840px){
    body{
        height: 812px;
    }
    header{
        height: 44px;
    }
    .box{
        margin-bottom: 50px;
    }
    .box .box_bg{
        background-image: url('../image/index_new/bottom_small_bg.png');
    }
    .head{
        height: 44px;
    }
    .head .nav ul{
        font-size: 14px;
        padding-left: 31.5px;
    }
    .head .nav ul li{
        margin-right: 24px;
    }
    .logo{
        width: 32px;
        height: 32px;
        margin-left: 16px;
    }
    .content #iconId{
        display: none;
    }
    .bottom_bg #bottomBgId{
        display: none;
    }
    .bottom_bg #bottomSmallBgId{
        display: block;
    }
    .content{
        height: 300px;
    }
    .content .contentTitle{
        margin-top: 40px;
        color: #252626;;
        font-size: 28px;
        font-weight: bold;
    } 
    .content .subTitle{
        font-size: 14px;
        margin-top: 16px;
    } 
    .downBtn{
        width: 45%;
        margin: 32px auto;
    }
    .pic .bgContent{
        top: 0;
    }
    .pic .bgContent img{
        width: 90%;
    }
    #downLoad{
        margin: 32px auto;
    }
    #bigLogo{
        margin-top: 108px;
    }
    .bottomText{
        height: 10px;
    }
    .bottomText p{
        font-size: 13px;
    }
    .bottomText p a{
        font-size: 13px;
    }
}
@media screen and (max-width:720px){
   
}
@media screen and (max-width:480px){
    .content #bigLogo{
        display: block;
    }
}
@media screen and (max-width:320px){
    .content #bigLogo{
        display: block;
    }
}

@media screen and (min-width:520px){
  
}

@media screen and (min-width:840px){
    .downBtn{
        display: none;
    }
    .content #bigLogo{
        display: none;
    }
    .bottom_bg #bottomSmallBgId{
        display: none;
    }
}

@media screen and (min-width:1620px){
    
}


@media screen and (min-width:1920px){

}

@media screen and (min-width:2560px){
  
}

@media screen and (min-width:3000px){
    
}

@media screen and (min-width:3300px){
   
}

@media screen and (min-width:3560px){
   
}