#services-header {
    background: url("../img/services-header.jpg") no-repeat center center;
    background-size: cover;
}
#about-header {
    background: url("../img/about-header.jpg") no-repeat center center;
    background-size: cover;
}
#contact-header {
    background: url("../img/contact-header.jpg") no-repeat center center;
    background-size: cover;
}
#blog-header {
    background: url("../img/blog-header.jpg") no-repeat center center;
    background-size: cover;
}
#portfolio-header {
    background: url("../img/portfolio-header.jpg") no-repeat center center;
    background-size: cover;
}