.banner{
    width: 100%;
    height: 500px;
}
.banner img{
    height: 500px;
}
.about-main{
    padding:20px  30px;
    overflow: hidden;
    min-height: 550px;
}
.about-title{
    height: 50px;
    line-height: 50px;
    font-size: 24px;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 20px;
}
.about-content{
    overflow: hidden;
}
@media screen and (max-width: 414px){
    .about-main {
        padding: 20px 15px;
        overflow: hidden;
        min-height: 450px;
    }
    .about-content{
        padding-bottom: 20px;
    }
    .box {
        width: 100%;
        overflow: hidden;
        padding: 10px 0;
        background: #fff;
    }
    .banner{
        display: none;
    }
    .about-main{
        margin-top: 40px;
    }
    .about-title{
        display: none;
    }
}