*{
    margin:0px;
    padding:0px;
}
ul,li{
    list-style:none;
}
a{
    text-decoration:none;
}
img{
    border:0px;
}

.a{
    width: 100%;
    height: 43.1rem;
    background:url("../images/banner_puru.png") no-repeat ;
    background-size: 100%  100%;
    padding-top: 49px;

}


.b{
    width: 62%;
    height: 1601px;
    margin-left: 19%;

}
.b1{
    height: 257px;

}
.b1_z{
    float: left;
    margin-right: 11%;
    width: 40%;
    height: 257px;
}
.b1_y{
    float: left;
    width: 49%;
    height: 257px;

}
.h{
    width: 100%;
    height: 414px;
    background: #002a4f;
}