.col-sm-6, .col-md-6, .col-lg-6,.col-xs-12 {
    position: relative;
    min-height: 1px;
    padding-right: 15px;
    padding-left: 15px;
    padding-left: 10px;
    padding-right: 10px;
}

.col-xs-12 {
    width: 100%;
    float: left;
}

@media (min-width: 768px) {
    .col-sm-12 {
        width: 100%;
        float: left;
    }
}

@media (min-width: 992px) {
    .col-md-6 {
        width: 50%;
        float: left;
    }
}

@media (min-width: 1200px) {
    .col-lg-6 {
        width: 50%;
        float: left;
    }
}
.train-video-item {
    margin-bottom: 30px;
}
.train-video-item-pic {
    height: 310px;
    overflow: hidden;
    margin-bottom: 20px;
    display: block;
}
.train-video-item-text {
    height: 70px;
    overflow: hidden;
}