.sobre{
    background: url("../images/bread_sobre.jpg") no-repeat center;
}
.servicos{
    background: url("../images/bread_servicos.jpg") no-repeat center;
}
.contato{
    background: url("../images/bread_contato.jpg") no-repeat center;
}
.margin-top-30{
    margin-top:30px;
}