.contents {
    padding-top: 86px;
}
.about_banner {
    /*height: 480px;*/
    /*background: url('https://allmark.oss-cn-shenzhen.aliyuncs.com/site/imgs/bejing_01.png') no-repeat;*/
    /*background-position: center;*/
    /*background-size: auto 100%;*/
    /*background-color: #0B2C5B;*/
    display: flex;
    display: -webkit-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    position: relative;
    padding: 0;
}
.about_banner picture {
    width: 100%;
}
.about_banner img {
    width: 100%;
}
.about_banner h4 {
    letter-spacing: 40px;
    font-size: 26px;
    color: #ffffff;
    text-align: center;
    position: absolute;
    top: 50%;
    margin-bottom: 0;
    margin-top: -14px;
}

.introduce .row{
    max-width: 1000px;
    margin: 0 auto;
}
h2{
    font-size:2rem;
    text-align: center;
    padding: 3rem 0 0;
}
.introduce {
    background-color: #ffffff;
    padding-bottom: 50px;
}
.introduce p{
    text-indent: 2rem;
    padding-top: 3rem;
    line-height: 2rem;
    letter-spacing: 0.1rem;
    color: #707070;
}
.introduce ul li{
    text-align: center;
    margin: 5rem 0;
}
.introduce ul li h3{
    letter-spacing: 0.5rem;
    font-size:1.5rem;
}
.introduce ul li img{
    padding:3rem 0;
}
.introduce ul li span{
    font-size:1rem;
    letter-spacing: 0.3rem;
    color: #808080;
}
.introduce ul li:nth-child(3) img{
    padding: 2.7rem 0;
}
.show_box {
    margin: 0 auto;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
    align-items: center;
    /*background-color: #F5F6F7;*/
    padding: 60px 0;
}
.show_item {
    margin: 0 40px;
    text-align: center;
}
.show_item img {
    display: block;
}
.show_item  span{
    display: block;
    margin-top: 15px;
    font-size: 16px;
    color: #333333;
}
.address_text {
    padding-top: 3rem;
    padding-left: 15px;
}
.address_text p {
    padding-top: 0;
    text-indent: 0;
    margin-bottom: 0;
}
.address_text p>span {
    font-weight: bold;
    color: #222;
}
.phone_show {
    display: none;
}

@media only screen and (max-width: 1242px) {}
@media only screen and (max-width: 767px) {
    .contents {
        padding-top: 0;
    }
    .phone_show {
        display: block;
    }
    .about_banner {
        height: 154px;
        /*background: url("../imgs/bejing_01.jpg")no-repeat;*/
        background-position: center;
        /*background-size: 100% 100%;*/
    }
    .about_banner h4 {
        letter-spacing: 5px;
        font-size: 1.8rem;
        color: #ffffff;
        text-align: center;
    }
    .show_item {
        margin: 0 10px;
    }
    .show_box {
        padding: 40px 5px;
    }
    .show_item  span {
        font-size: 14px;
    }
    h2 {
        font-size: 1.8rem;
        padding: 1rem 0 0;
    }
    .introduce {
        padding-bottom: 2rem;
    }
    .introduce p {
        padding-top: 1rem;
    }
    .address_text {
        margin-bottom: 1rem;
    }
    .address_text p {
        padding-top: 0;
        font-size: 13px;
    }
    .address_text p>span {
        font-size: 14px;
    }
}