.slideTxtBox,
.slideTxtBox .bd {
    overflow: hidden;
}

.slideTxtBox .bd {
    margin: 15px;
    height: calc(100% - 55px - 30px);
}

.slideTxtBox .infolist {
    height: 100% !important;
    overflow-y: auto;
}

.slideTxtBox .bd ul {
    padding: 0;
}