#content{
    padding-top: 42px;
    overflow: hidden;
}
.header, .function, .download, .contract{
    font-size: 14px;
    width: 1170px;
    margin: 0 auto;
}
.nav a{color:#000;}
.nav{
    padding-top: 9px;
    margin-left: 87px;
}
.nav .link_tab{
    display: inline-block;
    padding: 0 30px;
    border-right: dashed 1px #000;
}
.nav .link_tab:last-child{border-right: 0;}
.banner{
    width: 1440px;
    margin: 0 auto;
    margin-top: 16px;
    background: #cfd6cf;
    text-align: center;
}
.function, .download, .contract{padding-top: 178px;}
.function h5, .download h5, .contract h5{font-size: 30px;font-weight: normal;}
.function .func_img{margin-top: 78px;}
.download .box{
    width: 1010px;
    margin: 0 auto;
    margin-top: 75px;
    display: flex;
    flex-direction: row;
    justify-content:space-between;
}
.download .box .item{
    width: 243px;
    height: 243px;
    border:solid 1px #e4e4e4;
    position: relative;
}
.download .box .item .link{
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 16px;
    color: #888;
}
.download .box .item .cover{
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,.5);
    top: 0;
    left: 0;
    color: #fff;
    font-size: 16px;
    text-align: center;
    line-height: 243px;
}
.contract .box{
    margin: 75px 0 0 86px;
    display: flex;
    flex-direction: row;
}
.contract .box .item{
    height: 135px;
    border-left: dashed 1px #9d9d9d;
    padding: 0 0 0 19px;
    width: 320px;
}
.contract .box .item h4{
    font-size: 18px;
    font-weight: normal;
}
.contract .box .item .info{
    color: #888;
    font-size: 14px;
    line-height: 30px;
}
.footer{
    margin-top: 235px;
    background: #fafafa;
    height: 222px;
}
.footer .inner{
    width: 1030px;
    margin: 0 auto;
    padding: 62px 0 0 240px;
}
.footer .copyright{
    font-size: 12px;
    color: #000;
    margin-top: 86px;
}