.visual_area {
    background: url(../img/exhibition_visual.jpg) no-repeat center;
    background-size: cover;
    margin-bottom: 50px;
}
.mar {
    margin-bottom: 60px !important;
}
.exhibition h3 {
    text-align: center;
    font-weight: 700;
    font-size: 2.25em;
}
.exhibition h3 span {
    display: block;
    font-size: 1.125rem;
    color: #999;
}
.con_box {
    position: relative;
    margin-bottom: 120px;
    background: #f8f8f6;
    padding-bottom:120px;
}
/*
.con_box::after {
    content: '';
    display: block;
    width: 100%;
    background: #f8f8f6;
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    padding:100px 0;
}
*/
.con_inner {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    padding-top: 120px;
    align-items: flex-start;
}
.con_inner .txt_box {
    width: 50%;
}
.txt_box .tit {
    font-size: 3.25em;
    font-weight: 700;
    margin-bottom: 80px;
}
.txt_box span {
    display: block;
    font-size: 1.125rem;
    font-weight: 300;
}
.txt_box .co {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.125em;
    color: #be9b71;
    margin-bottom: 50px;
}
.txt_box .st {
    font-weight: 700;
    margin-bottom: 50px;
}
.txt_box .st strong {
    font-size: 2em;
    display: block;
}
.txt_box .con {
    color: #5b5b5b;
    margin-bottom: 40px;
    line-height: 2em;
}
.txt_box .con strong {
    color: #232323;
}
.txt_box .message {
    margin-bottom: 25px;
    font-size: .875em;
    color: #5b5b5b;
}
.txt_box .ceo {
    font-size: 1.125em;
    font-weight: 700;
}
.con_inner .con_img {
    width: 50%;
    text-align: right;
}
.img_box .sub_tit {
    text-align: center;
    font-family: 'Lato', sans-serif;
    font-weight: 700;
    font-size: 2.25em;
}
.img_box ul {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}
.img_box ul li {
    width: 224px;
    margin-right: 20px;
    margin-bottom: 50px;
}
.img_box ul li:nth-of-type(5n) {
    margin-right: 0;
}
.img_box ul li a {
    display: block;
}
.img_box ul li .ex_box {
    height: 224px;
    background: #f8f8f8;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.img_box ul li p {
    text-align: center;
    font-weight: 700;
}
@media screen and (max-width:1280px) {
    .mar {
        margin-bottom: 40px !important;
    }
    .img_box ul {
        width: 100%;
    }
    .img_box ul li {
        width: calc(20% - 16px);
    }
    .con_inner .con_img img {
        width: 100%;
    }
    .txt_box {
        box-sizing: border-box;
        padding: 0 2%;
    }
    .txt_box .tit {
        margin-bottom: 50px;
        font-size: 3em;
    }
    .txt_box .co {
        margin-bottom: 30px;
    }
    .txt_box .st {
        margin-bottom: 30px;
    }
    .txt_box .con {
        margin-bottom: 20px;
    }
}
@media screen and (max-width:1024px) {
    .con_inner {
        width: 96%;
    }
    .img_box ul li {
        width: calc(33.33% - 12px);
        margin-right: 18px;
    }
    .img_box ul li:nth-of-type(3n) {
        margin-right: 0;
    }
    .img_box ul li:nth-of-type(5n) {
        margin-right: 18px;
    }
}
@media screen and (max-width:768px) {
    .con_box::after {
        width: 300%;
        left: -100%;
    }
    .con_inner {
        padding-top: 50px;
    }
    .con_inner .txt_box {
        width: 100%;
        padding: 0;
        text-align: center;
        margin-bottom: 40px;
    }
    .txt_box .tit {
        margin-bottom: 50px;
        font-size: 2.5em;
    }
    .txt_box .tit span {
        font-size: 1rem;
    }
    .txt_box .co {
        margin-bottom: 30px;
    }
    .txt_box .st {
        margin-bottom: 30px;
    }
    .txt_box .con {
        margin-bottom: 20px;
    }
    .con_inner .con_img {
        width: 100%;
    }
}
@media screen and (max-width:640px) {
    .exhibition h3 {
        font-size: 1.7em;
    }
    .mar {
        margin-bottom: 20px !important;
    }
    .img_box ul li {
        width: calc(50% - 5px);
        margin-right: 0;
        margin-bottom: 15px;
    }
    .img_box ul li:nth-of-type(5n) {
        margin-right: 0;
    }
    .img_box ul li:nth-of-type(odd) {
        margin-right: 10px;
    }
    .img_box ul li:nth-of-type(1) img, .img_box ul li:nth-of-type(6) img, .img_box ul li:nth-of-type(4) img, .img_box ul li:nth-of-type(9) img, .img_box ul li:nth-of-type(8) img {
        width: 100%;
    }
    .img_box ul li:nth-of-type(7) img, .img_box ul li:nth-of-type(5) img{
        vertical-align: middle;
        height: 80%;
    }
    .txt_box .con br {
        display: none;
    }
    .txt_box .con .none {
        display: block;
    }
    .txt_box .st strong {
        font-size: 1.5em;
    }
}