body{
    background-color: #fff;
}
.main{
    background: #2c72d9 url(../images/index.jpg) no-repeat;
    width: 100%;
    padding: 118px 0;
    background-size: 100% 100%;
}
.mainCont{
    width: 1300px;
    margin:0 auto;
}
.mainCont a{
    display:block;
    float: left;
}
.mainCont a:first-child{
    margin-right:15px;
}
.mainCont a:nth-child(3){
    margin-right:15px;
    margin-top: 16px;
}
.mainCont a:last-child{
    margin-top: 16px;
}