header{
    background-repeat: no-repeat;
    background-size: cover;
    background-image: url("../img/solution-buliding/banner.png");
    color: #fff;
    position: relative;
    height: 500px;
}
.header{
    position: absolute;
    top: 0px;
    left: 0px;
    text-align: center;
    width: 100%;
    height: 100%;
    background-color:rgba(60, 143, 207, 0.4);
}