html {
    font-size: 6.25%;
    overflow-x: hidden;
}

body {
    font-size: 16px;
    overflow-x: hidden;
}

table {
    display: table;
    border-collapse: separate;
    box-sizing: border-box;
    text-indent: initial;
    border-spacing: 2px;
    border-color: grey;
}

tbody {
    display: table-row-group;
    vertical-align: middle;
    border-color: inherit;
}

tr {
    display: table-row;
    vertical-align: inherit;
    border-color: inherit;
}

th {
    display: table-cell;
    font-weight: bold;
    vertical-align: inherit;
    text-align: internal center;
}

td {
    display: table-cell;
    vertical-align: inherit;
    word-break: keep-all;
}

p, span, h1, h2, h3, h4, h5, h6 {
    word-break: keep-all;
}

p, span, div, h1, h2, h3, h4, h5, h6 {
    line-height: 1.6;
}


.show_500 {
    display: none;
}

.hide_500 {
    display: block;
}

.sub_main__visual {
    background-image: url(../img/introduce/bg.png);
}

.page_wrap {
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

#history {
    display: flex;
    justify-content: center;
    padding-bottom: 150rem;
    position: relative;
    z-index: 1;
    overflow: hidden;
    padding-top: 160rem;
}

.page_center {
    width: 100%;
    display: flex;
    max-width: 1250rem;
    flex-direction: column;
    /* justify-content: center;
    align-items: center; */
    box-sizing: border-box;
}

.title_box {
    margin-top: 200px;
    width: 100%;
    height: auto;
    display: flex;
    justify-content: space-between;
    flex-direction: row;
}

.title_box .left_box {
    width: 40%;
    height: auto;
}

.title_box .left_box p {
    letter-spacing: 0.5em;
    font-size: 26px;
    line-height: 1.615;
    color: #1778c7;
    font-family: 'NanumGothicBold';
    transition: all 0.6s;
    opacity: 0;
    transform: translateY(100%);
}

.title_box .left_box h2 {
    font-family: 'NanumGothicBold';
    font-size: 46px;
    word-break: keep-all;
    line-height: 1.3;
    transition: transform 0.6s, opacity 1s;
    opacity: 0;
    transform: translateY(50%);
}

.title_box .right_box {
    width: 50%;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.title_box .right_box p {
    font-size: 20px;
    word-break: keep-all;
    line-height: 1.615;
    transition:transform 0.6s, opacity 1s;
    opacity: 0;
    transform: translateY(30%);
}

.center_box {
    margin-top: 200px;
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding-bottom: 160rem;
    padding-top: 120rem;
}

.center_box > div:nth-child(1) {
    width: 100%;
}

.center_box > div:nth-child(1) p {
    font-size: 36px;
    font-family: 'NanumGothicBold';
    line-height: 1.615;
    transition: all 0.6s;
    transform: translateY(100%);
    opacity: 0;
}

.center_box > div:nth-child(2) {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
    margin-top: 50px;
}

.center_box > div:nth-child(2) .card_1, .center_box > div:nth-child(2) .card_2, .center_box > div:nth-child(2) .card_3 {
    width: 30%;
    height: auto;
    transition: transform 0.6s, opacity 1s;
    transform: translateY(30%);
    opacity: 0;
}

.center_box > div:nth-child(2) h2 {
    color: #1c4ab4;
    font-family: 'NanumGothicExtraBold';
    font-size: 48px;
    letter-spacing: 0.075em;
}

.center_box > div:nth-child(2) .txt01 {
    margin-top: 20px;
    font-size: 20px;
    line-height: 32px;
    font-family: 'NanumGothic';
}

.center_box > div:nth-child(2) .txt02 {
    margin-top: 40px;
    font-size: 18px;
    line-height: 32px;
    font-family: 'NanumGothic';
    word-break: keep-all;
}

.center_box > div:nth-child(2) span {
    color: #1778c7;
    font-weight: bolder;
}

.bottom {
    padding-top: 120rem;
    display: flex;
    justify-content: space-between;
    overflow: hidden;
}

.bottom::after {
    content: '';
    position: absolute;
    left: 0;
    top: 1620rem;
    z-index: -1;
    width: 100vw;
    height: 100%;
    background: #f8f8f8;
}

.bottom .year {
    position: relative;
    z-index: 1;

}

.bottom .year::after {
    content: '';
    position: absolute;
    left: 413rem;
    width: 1rem;
    top: 70rem;
    height: 100%;
    background-color: #ebebeb;
    z-index: -1;
}


.bottom .year .yearBox {
    display: flex;
    align-items: center;
    top: 120rem;
    
}

.bottom .year .yearBox h1 {
    font-size: 130rem;
    width: 305rem;
    transition: color 0.3s;
    font-weight: bolder;
    margin-top: 15rem;
}

.year .yearBox .line {
    margin-left: 25rem;
    width: 100rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
}

.year .yearBox .line::after {
    content: '';
    position: absolute;
    left: 0;
    width: calc(100% - 32rem);
    height: 2px;
    background-color: #202020;
    transition: background 0.3s;
}

.year .yearBox .line svg {
    width: 32rem;
    stroke: #202020;
    transition: stroke 0.3s;
}

.month {
    width: 55%;

}

.month table {
    padding-top: 170rem;
    margin-top: 50rem;
    font-size: 22rem;
    line-height: 2;
    transition: opacity .5s;
}

.month table:first-child {
    padding-top: 44rem;
    margin-top: 0;
}



.month table:last-child {
    padding-bottom: 150rem;
    padding-top: 254rem;
}

.month table tbody tr th {
    width: 70rem;
    text-align: left;
    vertical-align: text-top;
}

.yearBox.on h1 {
    color: #1c4ab4;
}

.yearBox.on .line::after {
    background: #1c4ab4;
}

.yearBox.on .line svg {
    stroke: #1c4ab4;
}


.sec0_bg_txt {
    position: absolute;
    z-index: -1;
    top: 315px;
}

.sec0_bg_txt p {
    color: #f2f2f2;
    white-space: nowrap;
    font-size: 410px;
    line-height: 0;
    font-family: 'NanumGothicExtraBold';
    margin-left: 10%;
}

/* 페이지 레이아웃 반응형 시작 */

@media only screen and (min-width:767px) and (max-width:1920px) {
    .sec0_bg_txt {
        top: 16.40625vw;
        left: -1.92708vw;
    }

    .sec0_bg_txt p {
        font-size: 21.35417vw;
    }

    .page_center {
        padding: 0 30px;
    }

}

@media only screen and (max-width:1160px) {
    .center_box {
        margin-top: 0;

    }
    .center_box > div:nth-child(1) {
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
    }

    .center_box > div:nth-child(2) {
        flex-direction: column;
    }

    .center_box > div:nth-child(2) .card_1, .center_box > div:nth-child(2) .card_2, .center_box > div:nth-child(2) .card_3 {
        width: 100%;
        padding: 5.3258987vw 0;
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        flex-direction: column;
    }

    .bottom::after {
        top: 2100rem;
    }
}

@media(max-width:1100px) {
    .month {
        width: 50%;
    }
}

@media(max-width:960px) {
    .bottom .year {
        width: 40%;
    }

    .bottom .year .yearBox{
        width: 38%;
    }

    .bottom .year::after{
        left: 346rem;
    }
}

@media only screen and (max-width:766px) {
    #history {
        padding: 0;
    }

    .sec0_bg_txt {
        top: 35.046373vw;
        left: -2.33645vw;
    }

    .sec0_bg_txt p {
        font-size: 23.36449vw;
    }

    .title_box {
        padding: 33.326489vw 4.1526423vw;
        padding-bottom: 0;
        margin-top: 0;
        justify-content: center;
        align-items: center;
        flex-direction: column;
    }

    .center_box {
        padding: 0 4.1526423vw;
        padding-top: 12.52496879vw;
    }

    .title_box .left_box {
        width: 100%;
    }

    .title_box .left_box p {
        font-size: 6.123546vw;
        line-height: 8.887961vw;
        text-align: center;
    }

    .title_box .left_box h2 {
        font-size: 8.4457321vw;
        line-height: 14.7865432vw;
        padding: 8.1265413vw 0;
        text-align: center;
    }

    .title_box .right_box {
        width: 100%;
        text-align: center;
    }

    .center_box {
        margin-top: 0;
        padding-bottom: 0;
    }

    .center_box > div:nth-child(2) {
        margin-top: 0;
    }

    .bottom {
        justify-content: flex-start;
        position: relative;
        padding: 0 4.1526423vw;
        padding-top: 60rem;
        flex-direction: column;
    }

    .bottom::after {
        top: 0;
    }

    .bottom .year .yearBox {
        width: 100%;
        top: 60rem;
        left: 4.1526423vw;
        background: transparent;
    }

    .bottom .year .yearBox h1 {
        font-size: 80rem;
        width: 200rem;
    }

    .bottom .year::after {
        width: 0;
    }

    .month {
        width: 100%;
    }

    .month table:first-child {
        padding-top: 180rem;
    }
    .month table {
        font-size: 16rem;
        padding-top: -70rem;
        width: 100%;
    }

}

@media(max-width:760px) {
    .bottom .year {
        width: 100%;
    }
}

@media(max-width:500px) {
    
    .show_500 {
        display: block;
    }

    .hide_500 {
        display: none;
    }

    .year .yearBox .line {
        width: 68rem;
    }

    .month table {
        padding-top: 60rem;
    }

    tr {
        display: inline-block;
        margin: 10px 0;
    }

    td {
        font-size: 5.687112vw;
    }

    .center_box > div:nth-child(2) h2 {
        width: 100%;
        font-size: 8.123659vw;
    }

    .center_box > div:nth-child(2) .txt01{
        width: 100%;
        font-size: 7.753129vw;
    }

    .center_box > div:nth-child(1) p {
        font-size: 8.879252vw;
    }

    .center_box > div:nth-child(2) .txt02 {
        font-size: 4.857692vw;
        line-height: 1.4;
        margin-top: 20px;
    }

    .title_box .right_box p {
        font-size: 4.857692vw;
        line-height: 1.4;
    }

    .hide_500 {
        display: none;
    }

    .show_500 {
        display: block;
    }    
}