@media screen and (min-width: 1300px) {
    .top_banner{
        height: 480px;
        width: 100%;
        background: url(../../images/about_us.png) no-repeat center 80px;
        background-size: auto 400px;
    }
}

@media screen and (max-width: 1300px) {
    .top_banner{
        height: 360px;
        width: 100%;
        background: url(../../images/about_us.png) no-repeat center 80px;
        background-size: 1500px 300px;
    }
}

.enter_us{
    width: 100%;
    background: url(../../images/bg.png) repeat center;
}
.enter_us .title_style{
    width: 1200px;
    margin: 0px auto;
    padding: 80px 0px 20px 0px;
    text-align: center;
}

.title_style > div.title_en {
    font-size: 14px;
    text-transform: uppercase;
    color: #999;
    display: block;
    margin-bottom: 10px;
}

.title_style > div.title_big {
    font-size: 48px;
    color: #000;
    display: block;
    font-family: 'weiruanzhengheiti', "Microsoft Yahei";
}
.title_style > div.title_big > span {
    color: #e5001b;
}
.title_style > div.title_line {
    width: 92px;
    margin: 20px auto 0 auto;
    height: 1px;
    background: #b7b7b7;
    display: block;
}
.title_style > div.title_desc {
    display: block;
    width: 100%;
    font-size: 16px;
    line-height: 27px;
    color: #777777;
    margin: 0 auto;
    padding: 25px;
}

.title_style > div.title_small {
    font-size: 32px;
    color: #000;
    display: block;
    font-family: 'weiruanzhengheiti', "Microsoft Yahei";
}

.company_brief{
    width: 1000px;
    margin: 0px auto;
    font-size: 18px;
    line-height: 45px;
    padding-bottom: 150px;
}