a:hover{
    text-decoration: none !important;
}
/*头部*/
.header{
    height: 560px;
    position: relative;
}
.banner{
    height: 100%;
}
.banner-img{
    height: 100%;
    background:  url("../img/encyclopedia/banner.png") no-repeat center;
    background-size: cover;
}

@media all and (min-width: 992px) and (max-width: 1200px){
    .header{
        height: 460px;
    }
}
@media all and (min-width: 768px) and (max-width: 992px){
    .header{
        height: 360px;
    }
}
@media all and  (max-width: 768px) and (min-width: 320px){
    .header{
        height: 360px;
    }
}

/*内容*/
.item-top{
    height: 60px;
    margin-bottom: 20px;
}
.item-top1{
    background: url("../img/encyclopedia/fenlan.png") no-repeat center;
    background-size: cover;
}
.item-top2{
    background: url("../img/encyclopedia/fenlan2.png") no-repeat center;
    background-size: cover;
}

.item-content .col-lg-4,.item-content .col-lg-3{
    position: relative;
    margin-bottom: 20px;
    text-align: center;
}

.art-item-img{
    width: 360px;
    height: 200px;
    margin: 0 auto;
}

.item-des{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    color:#fff;
    font-size: 16px;
}
.item-des>img{
    margin-top: 10%;
}
.item-des>h4{
    font-size: 18px;
    margin-top: 20px;
}
.item-des>p{
    margin-top: 4%;
    font-size: 14px;
}
.feat-item-img{
    width: 262px;
    height: 220px;
    margin: 0 auto;
}
.img-des{
    position: absolute;
    bottom: 0;
    left: 15px;
    right: 15px;
    padding: 5px 0;
    margin: 0 auto;
    background: rgba(0, 0, 0, .5);
    color: #fff;
    letter-spacing: 2px;
}

@media all and (max-width: 1200px) and (min-width: 320px) {
    .item-top{
        height: 40px;
    }
    /* .item-des>img{
        margin-top: 10%;
    } */
}
@media all and (min-width: 992px) and (max-width: 1190px) {
    .art-item-img{
        width: 297px;
        height: 180px;
    }
    .feat-item-img{
        width: 212px;
        height: 200px;
    }
}
@media all and (min-width: 768px) and (max-width: 991px) {
    .art-item-img{
        width: 220px !important;
        height: 210px !important;
    }
    .feat-item-img{
        width: 345px;
        height: 250px;
    }
    .img-des{
        left: 43px;
        right: 42px;
    }
}
@media all and (max-width: 767px) and (min-width: 320px) {
    .art-item-img{
        width: 274px !important;
        height: 190px !important;
    }
    .feat-item-img{
        width: 85%;
        height: 150px;
    }
    .img-des{
        left: 11%;
        right: 11%;
    }
    .item-des>img{
        margin-top: 5%;
    }
}
#footer{
    margin-top: 40px;
}