.leaderBox{
    border-bottom: 2px solid #e5e5e5;
    padding: 15px 0;
}
.leaderBox.b1,.leaderBox.b2{
    display: grid;
    grid-template-columns: 1fr 1fr;
    row-gap: 18px;
}
/* 新增：当b2有3个项目时调整网格 */
.leaderBox.b2.three-items {
    grid-template-columns: repeat(2, 1fr);
}
.leaderBox .item_title{
    width: 138px;
    line-height: 26px;
    background-color: #254fa1;
    text-align: center;
    color: #ffffff;
    font-size: 15px;
    font-family: sans-serif;
}
.leaderBox .leader-classify{
    display: flex;
    align-items: flex-start;
}
.leaderBox .leader-classify .item-con{
    width: calc(100% - 138px);
    display: grid;
    grid-template-columns: repeat(2,1fr);
    row-gap: 20px;
}
.leaderBox.b3 .leader-classify .item-con{
    grid-template-columns: repeat(5,1fr);
}
.leaderBox .leader-classify .news{
    height: 26px;
    font-size: 15px;
    font-family: sans-serif;
    text-align: center;
    margin-top:7px;
}
.leaderBox .leader-classify .news_title a{
    display:block;
    width:50px;
    text-align:justify;
    margin:0 auto;
}
.leaderBox .leader-classify .news_title a:after{content:'';width: 100%;display: inline-block;overflow: hidden;height: 0;line-height:0;}
@media screen and (max-width: 767px){
    .leaderBox.b1,.leaderBox.b2{
        grid-template-columns: 1fr;
    }
    .leaderBox .leader-classify .item-con,
    .leaderBox.b3 .leader-classify .item-con{
        grid-template-columns: repeat(4,1fr);
    }
}
@media screen and (max-width: 479px){
    .leaderBox .leader-classify .item-con,
    .leaderBox.b3 .leader-classify .item-con{
        grid-template-columns: repeat(3,1fr);
    }
    .leaderBox .leader-classify{
        flex-direction: column;
        align-items: flex-start;
    }
    .leaderBox .leader-classify .item-con{
        width: 100%;
        margin-top: 15px;
    }
}