.main{
    width: 100%;
    height: 830px;
    margin: 0 auto;
    background-color: #393a3f;
    background-size: cover;
    background-position: center;
    overflow:hidden;
}
.content{
    width: 1200px;
    height: 600px;
    background-color: rgba(255,255,255,0.3);
    margin: 0 auto;
    margin-top: 150px;
    background-image: url("../images/contart_us_bg2.jpg");
    background-size: 100% 100%;
    overflow:hidden;
}
.about_us{
    margin: 50px 0 0 30px;
    width: 400px;
    color: #ffffff;
}
.about_us .address{
    width: 100%;
    padding-left: 40px;
    padding-bottom: 40px;
    background: url("../images/contart_us_address_bg.png") no-repeat;
}
.about_us .address h3{
    color: white;
}
.about_us .address span{
    color: #9c9c9c;
}
.about_us .about_us_c{
    width: 100%;
    padding-left: 40px;
}
.about_us .about_us_c .about_us_cc{
    padding-left: 20px;
}
.about_us .about_us_c .about_us_cc p{
    line-height: 30px;
    font-size: 16px;
    padding: 7px 0;
    margin: 0;
}