.banner{
    width: 100%;
    height: auto;
    display: inline-block;
}
.banner img{
    width: 100%;
}
.join{
    width: 100%;
    height: auto;
    display: inline-block;
    margin-bottom: 40px;
}
.ab-top{
    width: 100%;
    height: auto;
    display: inline-block;
    border-bottom: 1px solid#e8e8e8;
}
.abt-left{
    float: left;
    line-height: 65px;
    letter-spacing: 1px;
}
.abt-left img{
    float: left;
    margin-right: 6px;
    margin-top: 24px;
}
.abt-left p{
    float: left;
}
.abt-left p a{
    color: #434343;
}
.abt-nav{
    float: right;
    line-height: 73px;
}
.abt-nav li{
    float: left;
    margin-left: 45px;
}
.abt-nav li a{
    font-size: 18px;
}
.abt-nav li:hover{
    border-bottom: 2px solid#1e63ac;
}
.culture-title{
    width: 100%;
    height: auto;
    display: inline-block;
    text-align: center;
    margin-bottom: 30px;
}
.culture-title h2{
    display: block;
    font-size: 32px;
    line-height: 45px;
    color: #0054a7;
    font-weight: bold;
}
.culture-title  i {
    width: 30px;
    height: 2px;
    background: #ccc;
    margin-top: 12px;
    text-align: center;
    display: inline-block;
}
.join-box{
    width: 100%;
    height: auto;
    margin-top: 40px;
    display: inline-block;
}
@media screen and (max-width: 768px) {
    .banner {
        width: 100%;
        height: auto;
        display: inline-block;
        overflow: hidden;
    }

    .banner img {
        width: 148%;
        margin-top: 50px;
        margin-left: -30px;
    }

    .abt-nav {
        float: right;
        line-height: 40px;
        width: 100%;
    }

    .abt-nav li {
        float: left;
        margin-left: 0px;
        width: 31%;
        text-align: center;
    }

    .abt-nav li a {
        font-size: 15px;
    }
    .culture-title h2 {
        display: block;
        font-size: 24px;
    }
    .join-box {
        margin-top: 13px;
    }
    .culture-title {
        margin-bottom: 20px;
    }
}