.imga1:hover {
    background-image: url(../img/hinbut-1.png);
    background-position: center center;
    background-size: 100%;
    background-repeat: no-repeat;
    height: 177px;
    margin-top: -10px;

}

.imga2:hover {
    background-image: url(../img/hinbut-2.png);
    background-position: center center;
    background-size: 100%;
    background-repeat: no-repeat;
    height: 177px;
    margin-top: -10px;

}

.imga3:hover{
    background-image: url(../img/hinbut-3.png);
    background-position: center center;
    background-size: 100%;
    background-repeat: no-repeat;
    height: 177px;
    margin-top: -10px;
    
    }

    .imga4:hover{
        background-image: url(../img/hinbut-4.png);
        background-position: center center;
        background-size: 100%;
        background-repeat: no-repeat;
        height: 177px;
        margin-top: -10px;
        
        }
.sub-1-1:hover {
    background-image: url(../img/sub-1.svg);
    z-index: 10;
}

.sub-1-3:hover {
    background-image: url(../img/sub-1-2_1.svg);
    z-index: 10;
}