.main_contents {
    width:1280px;
    margin:10px auto 0 auto;
}

.main_title {
    width:1280px;
    height:180px;
    margin:0 0 0 0;
}

.main_title img {
    width: 100%;
}

.main_contents_side80 {
    width: 1120px;
    margin: 0 80px 0 80px;
}

.main_contents_side80 img{
    width: 100%;
}