#barra {
padding: 0!important;
min-height: 175px!important;
}

#barra2 {
padding: 0!important;
text-align: center!important;
}

#primeiro {
padding: 0!important;
max-height: 500px!important
}

#segundo {
padding: 0!important;
min-height: 250px!important
}

#terceiro {
padding: 0!important;
min-height: 100px!important
}

#quarto {
padding: 0!important;
min-height: 600px!important
}