.science_box{
    width:1000px;
    margin:20px auto 0;
}
.science_box>h3{
    position: relative;
    display: block;
    font-size: 24px;
    color:#272727;
    text-align: center;
}
.science_box>h3:after{
    margin:10px auto 20px;
    display: block;
    content: '';
    width:75px;
    height:3px;
    background:#00479d;

}
.science_box ul{
    display: block;
    overflow:hidden;
}
.science_box ul>li{
    display: block;
    /* width:205px; */
    width: 220px;
    height:200px;
    border:1px solid #e5e5e5;
    /* padding:15px; */
    padding: 10px 5px 10px 10px;
    float:left;
    margin-right:15px;
    margin-bottom:20px;
}
.science_box ul>li:nth-child(4n){
    margin-right:0;
}
.science_box ul>li>a{
    display: block;
}
.science_box_info{
    padding-bottom:15px;
    border-bottom:1px solid #e5e5e5;
    overflow:hidden;
}
.science_box_info .info-left{
    width:75px;
    height:auto;
    float:left;
    background: #dedede;
    border-radius: 5px;
}
.science_box_info .info-right{
    display: block;
    width:135px;
    float:right;
}
.science_box_info .info-right>h3{
    display: block;
    font-size:18px;
    color:#00479d;
    line-height:25px;
    margin-bottom: 5px;
}
.science_box_info .info-right>p, .science_box_info .info-right span {
    display: block;
    font-size:15px;
    color:#5d5d5d;
    line-height:20px;
}
.science_box ul>li>a>p{
    font-size:15px;
    line-height:18px;
    text-align: justify;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    padding-top:15px;
    overflow: hidden;
    margin-right: 5px;
}
.keshi{
    margin: 8px 0 8px 0;
}
.info-left img{
    display: block;
}
.science_box ul>li:hover{
    border: 1px solid #00479d;
}