#teaser .k_00 {
    background-image: url(../images/k_000.png);
    background-position: 50% 50%;
}

@media only screen and (max-width: 960px) and (orientation: landscape),
       only screen and (max-height: 273px) and (orientation: portrait) {
    #teaser .k_00 {
        background-image: url(../images/k_000.png);
        background-position: 50% 50%;
    }
}

#teaser .k_01 {
    background-image: url(../images/k_001.png);
    background-position: 50% 50%;
}

@media only screen and (max-width: 960px) and (orientation: landscape),
       only screen and (max-height: 273px) and (orientation: portrait) {
    #teaser .k_01 {
        background-image: url(../images/k_001.png);
        background-position: 50% 50%;
    }
}

#teaser .k_02 {
    background-image: url(../images/k_002.png);
    background-position: 50% 50%;
}

@media only screen and (max-width: 960px) and (orientation: landscape),
       only screen and (max-height: 273px) and (orientation: portrait) {
    #teaser .k_02 {
        background-image: url(../images/k_002.png);
        background-position: 50% 50%;
    }
}

#teaser .k_03 {
    background-image: url(../images/k_003.png);
    background-position: 50% 50%;
}

@media only screen and (max-width: 960px) and (orientation: landscape),
       only screen and (max-height: 273px) and (orientation: portrait) {
    #teaser .k_03 {
        background-image: url(../images/k_003.png);
        background-position: 50% 50%;
    }
}
#teaser .k_04 {
    background-image: url(../images/k_004.png);
    background-position: 50% 50%;
}

@media only screen and (max-width: 960px) and (orientation: landscape),
       only screen and (max-height: 273px) and (orientation: portrait) {
    #teaser .k_04 {
        background-image: url(../images/k_004.png);
        background-position: 50% 50%;
    }
}