body{
    background: #eeeeee;
}

.xilie{
    width: 1400px;
    margin: auto;
    font-size: 30px;
    font-weight: bold;
}

.xilieimg{
    display: block;
    width: 1400px;
    margin: auto;
    margin-top: 25px;
}

.proprolist{
    width:1420px;
    overflow: hidden;
    position: relative;
    margin: auto;
    margin-bottom: 325px;
    padding-top: 30px;
}

.pross{
    width:25%;
    position: relative;
    float:left;
    display: block;
    overflow: hidden;
}

.prossdiv{
    width: 94.4%;
    margin: auto;
    -webkit-transition: all .2s linear;
    transition: all .2s linear;
}

.prossdiv:hover{
    -webkit-transform: translate3d(0,-15px,0);
    transform: translate3d(0,-15px,0);
    -moz-transform: translate3d(0,-15px,0);
    -ms-transform: translate3d(0,-15px,0);
    -o-transform: translate3d(0,-15px,0);
}

.protop{
    width: 100%;
    height: 335px;
    background: white;
    position: relative;
}

.ppimgs{
    display: block;
    max-height: 289px;
    position: absolute;
    max-width: 85%;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}

.propaa{
    text-align: center;
    font-weight: bold;
    margin-top: 20px;
    margin-bottom: 10px;
    color:black;
}

.prppbb{
    text-align: center;
    font-size: 12px;
    color: #999999;
    margin-bottom: 30px;
}

@media screen and (max-width: 1600px) {
    .xilie{
        width:87.5%;
    }

    .xilieimg{
        width:87.5%;
    }

    .proprolist{
        width:88.75%;
        margin-bottom:270px;
    }
}

@media screen and (max-width: 1400px) {
    .proprolist{
        margin-bottom:230px;
    }

    .protop{
        height:250px;
    }

    .ppimgs {
        max-height: 200px;
    }
}

@media screen and (max-width: 1200px) {
    .proprolist{
        margin-bottom:200px;
    }

    .protop{
        height:220px;
    }

    .ppimgs {
        max-height: 180px;
    }
}

@media screen and (max-width: 1024px) {
    .proprolist{
        margin-bottom:150px;
    }

    .protop{
        height:200px;
    }

    .ppimgs {
        max-height: 160px;
    }
}

@media screen and (max-width: 768px) {
    .proprolist{
        margin-bottom:120px;
    }

    .protop{
        height:160px;
    }

    .ppimgs {
        max-height: 130px;
    }
}

@media screen and (max-width: 450px) {
    .proprolist{
        margin-bottom:100px;
    }

    .pross {
        width: 50%;
    }

    .xilie{
        font-size: 25px;
    }
    
}