.sp{
    display: none;
}

.hr-box__inner dl {
    text-align: center;
}

.hr-box__inner dl dt {
    position: relative;
    width: 22em;
    border: 1px solid #666;
    border-radius: 1em;
    margin-left: 2em;
    padding: .5em 0;
    background-color: #fff;
    z-index: 1;
}

.hr-box__inner dl dd {
    width: 26em;
    padding: 1.5em 0 .5em;
    border: 1px solid #666;
    margin: -1em 0 1em;
    background-color: #fff;
}


@media screen and (max-width: 640px) {
    
    .sp{
        display: block;
    }
    
    .hr-box__inner dl dt {
        width: 80%;
    }
    
    .hr-box__inner dl dd {
        width: 100%;
    }
}