.study-content{
    margin: 50px 0 0 50px;
    width: 77%;
}
.study-inner{
    display: flex;
    display: -ms-flexbox;  /* 混合版本语法: IE 10 */
    display: -webkit-flex; 
    width: 100%;
    flex-wrap: wrap;
    justify-content: space-between;
}
.study-research-card{
    background: url(../images/testBack.png) no-repeat;
    background-size: cover;
    width: 280px;
    height: 190px;
    position: relative;
    width: 31%;
    margin-bottom: 20px;
}
.study-research-card-content{
    position: absolute;
    bottom: 0;
    width: 100%;
}
.study-card-title{
    margin-bottom: 8px;
    text-align: center;
    font-size: 16px;
    color: #FFFFFF;
    z-index: 100;
}
.study-card-inner-content{overflow: hidden;text-overflow: ellipsis;display: -webkit-box;-webkit-line-clamp: 5;-webkit-box-orient: vertical;text-align: center;color: white;line-height: 29px;}
.study-research-card-content img{
    width: 100%;
    bottom: 0;
    position: absolute;
    z-index: 0;
}
.study-research-card:hover{
    background: url(../images/testActive.png) no-repeat !important;
    background-size: cover !important;
    /* opacity: 0.5; */
    cursor: pointer;
}
.study-research-card:hover>.study-research-card-content {
    top: 0;
}
.study-research-card:hover>.study-research-card-content>.study-card-title{
    margin-top: 8px;
    margin-bottom: 0!important;
}
.study-research-card:hover>.study-research-card-content img {
    top: 0;
}
.study-research-card:hover>.study-research-card-content>.study-display{
    display: block;
    display: -webkit-box!important;
    display: box!important;
    padding: 14px 20px;
}
.study-display{
    display: none;
}
@media only screen and (max-width: 1024px) {
    .study-research-card{
        width: 48%;
    }
}
@media only screen and (max-width: 768px) {
    .study-research-card{
        width: 48%;
    }
    .study-content {
        margin: 50px 0 0 0;
        width: 100%;
    }
}
@media only screen and (max-width: 500px) {
    .study-research-card{
        width: 100%;
        height: 240px;
    }
    .study-card-title {
        margin-bottom: 18px;
    }
    .study-research-card:hover>.study-research-card-content>.study-card-title{
        margin-top: 18px;
    }
    .study-research-card:hover>.study-research-card-content>.study-display{
        /* display: block; */
        display: -webkit-box!important;
        padding: 14px 20px;
    }
    .study-card-inner-content {
        line-height: 34px;
        padding: 25px 20px!important;
    }
    
}