.content_title { /* padding:5px; */
        text-align: center;
        margin: 30px 0px 10px 0px;
        font-size: 20px;
        font-weight: bold;
    }

    .audio-list .audio-box {
        width: 246px;
        height: 70px;
        float: left;
        margin-right: 19px;
        margin-left: 5px;
        margin-bottom: 10px;
        margin-top: 20px;
        position: relative;
        overflow: hidden;
        box-shadow: 0 0px 9px rgba(0,0,0,.1);
        background: #ffffff;
        padding-top: 20px;
        padding-left: 20px;
        font-size: 15px;
        text-align: left;
        font-weight: bold;
        color: #666;
        float: left;
    }

    .pptx {
        display: inline-block;
        width: 50px;
        height: 52px;
        line-height: 52px;
        float: left;
        background: url(/Content/orange/images/pptx.png);
    }

    .title {
        line-height: 52px;
        margin-left: 20px;
    }
/*1000宽度开始*/
@media screen and (max-width:1390px) {
.audio-list .audio-box {
    width: 289px;
}



}