.clear:after {
    display: block;
    clear: both;
    height: 0;
    content: ".";
    visibility: hidden;
    overflow: hidden;
}
body{
    background: linear-gradient(to right bottom,#02bdc6,#0152bf);
}
.bigbox{
    margin-top:120px;
    padding-top:120px;
    padding-bottom:120px;
    width:100%;
    position: relative;
}
.bigbox img{
    width:100%;
    position: absolute;
    top:0;
    left:0;
}
.content{
    padding:40px 80px;
    width:1040px;
    margin:0 auto;
    background: #fff;
}
.header{
    width:150px;
    height:150px;
    display: flex;
}
.folder{
    width:150px;
    height:150px;
    position: relative;
}
.folder img.fir_bg{
    position: absolute;
    top:0;
    width:150px;
    height:150px;
}
.folder .img2{
    width:130px;
    height:auto;
    position:absolute;
    top:50%;
    transform:translateY(-50%);
}
.details {
    margin-left:170px;
    position: relative;
}
.details h3{
    width:800px;
    position: absolute;
    top:10px;
    font-size: 18px;
    color:#222;
    font-weight: normal;
}
.details p {
    width:800px;
    max-height: 77px;
    overflow: auto;
    position: absolute;
    top:40px;
    font-size: 14px;
    color:#222;
}
.details span{
    width:350px;
    position: absolute;
    bottom:10px;
    font-size: 14px;
    color:#222;
}
.list{
    height:auto;
}
.list ul li{
    float:left;
    margin-top:20px;
    width:240px;
    height:200px;
    margin-right:24px;
    position: relative;
    overflow: hidden;
    border:1px solid #ddd;
    background: #0d0d0d;
    cursor:pointer;
}
.list ul li .cover{
    position: absolute;
    bottom:0;
    width:240px;
    height:50px;
    background: rgba(0,0,0,0.5);
    display: none;
}
.list ul li:hover .display{
    display: block;
}
.list ul li:visited .display{
    display: none;
}
.list ul li img{
    width:240px;
    height:auto;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
}
.list ul li p{
    height:30px;
    padding:8px 10px;
    font-size: 14px;
    overflow: hidden;
    word-break: break-all;
    white-space: normal;
    text-overflow: ellipsis;
    color:#fff;
}
.bigCover{
    width:100%;
    height:100%;
    z-index:200;
    display: none;
    position: fixed;
    top:0;
    left:0;
    background: rgba(0,0,0,0.8);
    overflow: auto;
}
/*横版*/
.hb{
    width:auto;
    max-width:800px;
    height:auto;
    max-height:560px;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
}
/*竖版*/
.sb{
    width:100%;
    height:auto;
}