body{
    background:#f5f5f5;
}
#top_banner img{
    max-width:100%;
    display:block;
    margin:0 auto;
}
/* 导行nav-min */
#nav-min{
    width:100%;
    min-height:55px;
    background:#fff;
    border-bottom:2px solid #f0242d;
}
#nav-min ul{
    text-align:center;
}
#nav-min ul li{
    display:inline-block;
    height:55px;
}
#nav-min ul li a{
    display:block;
    color:#37474f;
    line-height:55px;
    font-size:16px;
    padding:0px 12px;
    text-align:center;
}
#nav-min ul li a:hover{
    color:#fff;
    background:#f0242d;
}
#nav-min ul li a.active{
    color:#fff;
    background:#f0242d;
    height:55px;
    border-bottom:2px solid #f0242d;
}
#main{
    width:1200px;
    margin:30px auto;
    overflow:hidden;
}
/* 内容content */
#content{
    max-width:1200px;
    display:flex;
    flex-wrap: wrap;
    background: #fff;
    border-top:1px solid #ddd;
    border-left:1px solid #ddd;
    margin:50px auto;
}
#content .item{
    width:369px;
    padding:15px;
    border-right:1px solid #ddd;
    border-bottom:1px solid #ddd;
}
#content .item img{
    margin:0 auto;
    max-width:100%;
}