a.A4 {
background-image:url(../img/4_projekte/4A.png);
display: block;
width: 297px;
height: 297px;
}
a.A4:hover {
background-image:url(../img/4_projekte/4A_Text.png);
}

a.B4 {
background-image:url(../img/4_projekte/4B.png);
display: block;
width: 297px;
height: 297px;
}
a.B4:hover {
background-image:url(../img/4_projekte/4B_Text.png);
}

a.C4 {
background-image:url(../img/4_projekte/4C.png);
display: block;
width: 297px;
height: 297px;
}
a.C4:hover {
background-image:url(../img/4_projekte/4C_Text.png);
}

a.D4 {
background-image:url(../img/4_projekte/4D.png);
display: block;
width: 600px;
height: 297px;
}
a.D4:hover {
background-image:url(../img/4_projekte/4D_Text.png);
}

a.F4 {
background-image:url(../img/4_projekte/4F.png);
display: block;
width: 297px;
height: 297px;
}
a.F4:hover {
background-image:url(../img/4_projekte/4F_Text.png);
}