.left_margin{
    margin-left: 22%;
}
.title_div{
    margin-top: 20px;
}
.title{
    width: 17vw;
}
.main_img{
    width: 32vw;
    margin-top: 15vh;
}
.code_img{
    margin-top: 2vh;
    width: 8vw;
}
footer{
    margin-top: 14vh;
    display: flex; 
    justify-content: center;
    -ms-flex-align: center;
    color: rgba(0, 0, 0,0.8);
}