@media screen and (min-width: 100px) and (max-width: 320px)
{
    #wrapper
    {
        width: 100%;
    }
    .caseList dd
    {
        width: 100%;
    }
}
@media screen and (min-width: 321px) and (max-width: 640px)
{
    #wrapper
    {
        width: 100%;
    }
    .caseList dd
    {
        width: 50%;
    }
}
@media screen and (min-width: 641px) and (max-width: 1000px)
{
    #wrapper
    {
        width: 100%;
    }
    .caseList dd
    {
        width: 33.3%;
    }
}
@media screen and (min-width: 1001px) and (max-width: 1200px)
{
    #wrapper
    {
        width: 100%;
    }
    .caseList dd
    {
        width: 25%;
    }
}
@media screen and (min-width: 1201px)
{
    .caseList dd
    {
        width: 25%;
    }
}