.banner {
    position: relative;
    height: 320px;
    min-width: 1180px;
    overflow: hidden;
    background-color: black;
}

.banner span {
    position: absolute;
    display: block;
    font-size: 0;
    width: 1920px;
    min-width: 1180px;
    height: 320px;
    left: 50%;
    margin-left: -960px;
    background: url(../img/banner/banner-about.jpg) no-repeat;
}


/* 小菜单 */

.top-nav {
    background-color: #f5f5f5;
    height: 50px;
    line-height: 50px;
    text-align: center;
    border-bottom: 1px solid #e9e9e9;
}

.top-nav li {
    float: left;
    width: 33.33%;
    font-size: 13px;
}

.top-nav li a {
    display: block;
    width: 100%;
    height: 50px;
    line-height: 50px;
    font-size: 13px;
    color: #666;
}

.top-nav li a:hover {
    background-color: #e5e5e5;
}

.top-nav .active {
    background-color: #fff;
    border-left: 1px solid #e9e9e9;
    border-right: 1px solid #e9e9e9;
}


/* 招聘内容 */

.join-us {
    margin: 50px auto;
}

.join-us h3 {
    font-size: 20px;
    font-weight: bold;
    color: #303030;
}

.join-us .box {
    position: relative;
    height: 185px;
    margin-top: 20px;
}

.join-us .box span {
    position: absolute;
    left: 0;
    padding: 45px 15px 0 15px;
    width: 55px;
    height: 185px;
    color: #838383;
    font-size: 15px;
    font-weight: 400;
    text-align: center;
    background-color: rgb(245, 245, 245);
}

.join-us .box ul {
    height: 185px;
    padding-left: 85px;
    padding-top: 22px;
    border: 1px solid #e5e5e5;
}

.join-us .box ul li {
    font-size: 14px;
    line-height: 30px;
    color: #353535;
    margin-top: 10px;
    list-style: circle;
    text-align: left;
}