[mn="4100"] .accordiontab { 
    border: 1px solid #ccc;
    position: relative; 
}

[mn="4100"] .accordiontab ~ .accordiontab {
    margin: 15px 0 0;
}
[mn="4100"] .accordiontab > * {
    padding: 15px 45px 15px 15px;
} 
[mn="4100"] .accordiontab > .btm {
    padding-right: 15px;
} 
[mn="4100"] .accordiontab .slide {
    display: none;
}
[mn="4100"] .accordiontab .top {
    line-height: 1;
    font-size: 120%;
    font-family: var(--ft-t1);
    cursor: pointer;
}
[mn="4100"] .accordiontab .top:after {
    content: '';
    aspect-ratio: 1 / 1;
    width: 21px;
    background-image: url(src/plus.png);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    position: absolute;
    right: 15px;
    top: 15px;
}
[mn="4100"] .accordiontab.active .top:after { 
    background-image: url(src/minus.png); 

}
@media (max-width: 575px){ 
    [mn="4100"] .accordiontab .top:after {
        width: 18px;
    }
}