div.idea>div>div:nth-child(2) {
    min-height: 70px;
    padding-left: 90px;
    background-position: 0px 0px;
    background-repeat: no-repeat;
    background-color: transparent;
}

div.idea>div:nth-child(1)>div:nth-child(2) {
    background-image: url('../Contents/Images/icon01.png');
}

div.idea>div:nth-child(1):hover>div:nth-child(2) {
    background-image: url('../Contents/Images/icon01_hover.png');
}

div.idea>div:nth-child(2)>div:nth-child(2) {
    background-image: url('../Contents/Images/icon02.png');
}

div.idea>div:nth-child(2):hover>div:nth-child(2) {
    background-image: url('../Contents/Images/icon02_hover.png');
}

div.idea>div:nth-child(3)>div:nth-child(2) {
    background-image: url('../Contents/Images/icon03.png');
}

div.idea>div:nth-child(3):hover>div:nth-child(2) {
    background-image: url('../Contents/Images/icon03_hover.png');
}