body{
    background: url(../images/background_mono.png) no-repeat center;
    width: 100%;
    background-attachment: fixed;
}


#container{
    width: 100%;
}

#about_content{
    width: 1000px;
    margin: 0 auto;
    background-color: rgba(0,0,0,0.7);
}

#about_main{
    width: 900px;
    margin: 0 auto;
    display: flex;
}

#about_main_left{
    width: 350px;
    margin-top: 50px;
}

#about_main_left h2{
    color: #fff;
    text-align: center;
    font-family: serif;
    font-size: 1.5em;
}

#about_main_left .about_subtitle{
    color: #fff;
    text-align: center;
    font-family: serif;
    font-size: 1.1em;
    margin-top: 20px;
}

#about_greeting{
    display: flex;
    margin-top: 60px;
}

#about_greeting .gr_l{
    width: 210px;
    font-size: 0.9em;
    font-family: sans-serif;
    color: #fff;
}

#about_greeting .gr_r{
    width: 120px;
    margin-left: 20px;

}







#about_main_right{
    margin: 50px 0 50px 30px;
}