#txt1 {
    background-image: url(txt1.png);
    background-repeat: no-repeat;
    display: block;
    background-size: calc(2440px /2) calc(1530px /2);
}

.sprite-00_nb_prod {
    width: 600px;
    height: 500px;
    background-position: calc(-5px /2) calc(-5px /2);
}

.sprite-01_nb_security {
    width: 600px;
    height: 500px;
    background-position: calc(-615px /2) calc(-5px /2);
}

.sprite-02_tab_connect {
    width: 600px;
    height: 500px;
    background-position: calc(-1225px /2) calc(-5px /2);
}

.sprite-03_tab_collab {
    width: 600px;
    height: 500px;
    background-position: calc(-5px /2) calc(-515px /2);
}

.sprite-04_printer_time {
    width: 600px;
    height: 500px;
    background-position: calc(-615px /2) calc(-515px /2);
}

.sprite-05_printer_security {
    width: 600px;
    height: 500px;
    background-position: calc(-1225px /2) calc(-515px /2);
}

.sprite-06_networking {
    width: 600px;
    height: 500px;
    background-position: calc(-5px /2) calc(-1025px /2);
}

.sprite-07_storage {
    width: 600px;
    height: 500px;
    background-position: calc(-615px /2) calc(-1025px /2);
}

.sprite-08_power {
    width: 600px;
    height: 500px;
    background-position: calc(-1225px /2) calc(-1025px /2);
}

.sprite-09_top_brands {
    width: 600px;
    height: 500px;
    background-position: calc(-1835px /2) calc(-5px /2);
}

.sprite-10_servers {
    width: 600px;
    height: 500px;
    background-position: calc(-1835px /2) calc(-515px /2);
}