@media screen and (min-width: 541px){
    .content-main-box{
        height: auto !important;
    }
    .lib-main-item{
        display: inline-block;
        position: relative;
        width: 35.625rem;
        height: 26.25rem;
        margin-bottom: 3.4375rem;
    }
    .lib-main-item > img{
        max-width: 100%;
        height: auto;
    }
    .lib-main-item:nth-child(odd){
        margin-right: 3.4375rem;
    }
    .lib-mask-title{
        position: absolute;
        height: 4.375rem;
        width: 35.625rem;
        text-align: center;
        line-height: 4.375rem;
        font-size: 1.5rem;
        opacity: .6;
        background-color: #000;
        color: #fff;
        bottom: 0;
    }
    .lib-mask-more{
        display: none;
        position: absolute;
        width: 35.625rem;
        height: 26.25rem;
        background-color: #f65b30;
        opacity: .8;
        top: 0;
        left: 0;
        z-index: 1;
    }
    .mask-more-title{
        margin-top: 10.3125rem;
        margin-bottom: .625rem;
        text-align: center;
        font-size: 1.875rem;
        color: #fff;
    }
    .mask-more-content{
        text-align: center;
        font-size: 1.25rem;
        color: #fff;
    }
    .lib-main-item:hover > .lib-mask-title{
        display: none;
    }
    .lib-main-item:hover > .lib-mask-more{
        display: block;
    }
}

@media screen and (max-width: 540px){

    .content-main-box{
        height: auto !important;
    }
    .lib-main-list{
        padding: 0 20px;
        margin: 10px 0;
    }
    .lib-main-item{
        display: inline-block;
        position: relative;
        margin-bottom: 3.4375rem;
        box-shadow: 0 .5rem 1rem rgba(0,0,0,.15)!important;
    }
    .lib-main-item > img{
        max-width: 100%;
        height: auto;
    }
    .lib-main-item:nth-child(odd){
        margin-right: 3.4375rem;
    }
    .lib-mask-title{
        position: absolute;
        text-align: center;
        width: 100%;
        line-height: 4.375rem;
        font-size: 1.5rem;
        opacity: .6;
        background-color: #000;
        color: #fff;
        bottom: 0;
    }
    .lib-mask-more{
        display: none;
        position: absolute;
        height: 100%;
        width: 100%;
        background-color: #f65b30;
        opacity: .8;
        top: 0;
        left: 0;
        z-index: 1;
        flex-direction: column;
        justify-content: center;
    }
    .mask-more-title{
        margin-bottom: .625rem;
        text-align: center;
        font-size: 1.875rem;
        color: #fff;
    }
    .mask-more-content{
        text-align: center;
        font-size: 1.25rem;
        color: #fff;
    }
    .lib-main-item:hover > .lib-mask-title{
        display: none;
    }
    .lib-main-item:hover > .lib-mask-more{
        display: flex;
    }
    .business-main{
        display: flex;
        justify-content: center;
    }
    .lib-main-list{
        display: flex;
        flex-direction: column;
    }
    .lib-main-item{
        margin: 5px 0 !important;
    }
    .business-nav-item{
        line-height: unset;
    }
}