body {
    min-width: 1200px;
    margin: 0 auto;
    overflow: auto;
    background-color: #fff;
}
.header{
    background-color: #fff;
    border-bottom: 1px solid #eee;
}
/*导航*/
.case_nav {
    background-color: #fff;
    border-bottom: 1px solid #dfdfdf;
}

.inv-type {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.inv-type .tab {
    position: relative;
    cursor: pointer;
    display: inline-block;
    width: 87px;
    height: 41px;
    font-size: 16px;
    line-height: 45px;
    text-align: center;
    color: #3b3b3b;
    margin-bottom: 10px;
}

.case_nav .inv-type .tab-active {
    border-bottom: 4px solid #ffcb2f;
}

/*用户案例*/
.case-title{
    width: 100%;
    // height: 163px;
    // background: url(../images/yonghuanli@2x.png) center no-repeat;
}
.case-title img{
    width: 100%;
}
.case-list{
    width: 1200px;
    margin:0 auto;
}
.case-list ul{
    padding: 40px 0;
}
.case-list li{
    width: 220px;
    height: 220px;
    float: left;
    margin-right: 25px;
    margin-bottom: 60px;
    position: relative;
    border:1px solid #eaeaea;
    box-sizing: border-box;
}
.case-list li:nth-of-type(5n){
    margin-right: 0;
}
.case-list li img{
    width: 100%;
    height: 100%;
}
.case-list li .case-code{
    position: absolute;
    left:0;
    top:0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,.6);
    transition:all 0.5s;
    opacity: 0;
    color: #fff;
    box-sizing: border-box;
    padding: 0 5%;
}
.case-list li:hover .case-code{
    opacity: 1;
}
.case-list .case-code h3{
    font-size: 18px;
    text-align: center;
    line-height: 1.5;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-weight: normal;
    margin:5px 0;
}
.case-list .case-code img{
    width: 160px;
    height: 160px;
    margin:0 auto;
}
.case-list .case-code p{
    font-size: 16px;
    font-weight: normal;
    text-align: center;
    line-height: 3;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.cc_name{
    text-align: center;
    height: 40px;
    line-height: 40px;
    font-size: 20px;
    margin-top: 10px;
}