* {
    box-sizing: border-box;
}
#wrap.non_back .header_inner .back {
    display: none;
}
main {
    max-width: 1200px;
    margin: 0 auto;
}

/* header */
header {
    position: fixed;
    left: 0; top: 0;
    width: 100%; height: 6rem;
    background: #E6F4FF;
    z-index: 999;
}
.header_inner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}
.header_inner .back {
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    display: block;
    width: 2.5rem; height: 2.5rem;
    background: url(../img/arrow-1.png) no-repeat center/contain;
}
.header_inner a {
    display: block;
    height: 2.3rem;
}
.header_inner a img {
    display: block;
    height: 100%;
}
nav {
    position: relative;
    height: 6rem;
}
.nav_box {
    background: linear-gradient(to right, #47CAD8, #2781E8);
    position: relative;
}
.nav_area {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 1px solid rgba(172, 226, 239,0.7);
    border-right: 1px solid rgba(172, 226, 239,0.7);
}
.nav_area li {
    width: calc(100% / 3);
    text-align: center;
    padding: 1rem 0;
    position: static;
    cursor: pointer;
}
.nav_area li:nth-child(2) {
    border-left: 1px solid rgba(172, 226, 239,0.7);
    border-right: 1px solid rgba(172, 226, 239,.7);
}
.nav_area li .main_menu {
    color: #fff;
    font-size: 1.2rem;
}
.depth_box {
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    top: 100%;
    width: 100vw;
    display: none;
    background: #fff;
    z-index: 1000;
    padding-bottom: 2rem;
    border-left: 1px solid rgba(172, 226, 239,0.7);
    border-right: 1px solid rgba(172, 226, 239,0.7);
}
.depth_box a {
    display: block;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}
.depth_box a.on span {
    color: #5C7CB8;
}
.depth_box a span {
    display: inline-block;
    width: calc(100% / 3);
    padding: 1.3rem 0;
    border-left: 1px solid rgba(172, 226, 239,0.7);
    border-right: 1px solid rgba(172, 226, 239,0.7);
}

/* index */
.index_long {
    padding-top: 10rem;
    background: #E6F4FF;
}
.inner {
    max-width: 1200px;
    margin: 0 auto;
}
.index_long .inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2.5rem;
}
.index_long .inner .left h1{
    font-size: 1.8rem;
    font-weight: 800;
    padding-bottom: 2rem;
}
.index_long .inner .left p {
    font-weight: 600;
    color: #414242;
    line-height: 1.4;
    font-size: 16px;
}
.index_long .inner img {
    display: block;
    height: 14rem;
}
.index_cont {
    padding: 2rem 0;
}
.index_cont_area li {
    margin-bottom: 2rem;
}
.index_cont_area li a {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.index_cont_area li a:before {
    content: '';
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 5rem; height: 5rem;
}
.index_cont_area li:first-child a:before{
    background: url(../img/main-arrow-1.png) no-repeat center/contain;
}
.index_cont_area li:nth-child(2) a:before{
    background: url(../img/main-arrow-2.png) no-repeat center/contain;
}
.index_cont_area li:nth-child(3) a:before{
    background: url(../img/main-arrow-3.png) no-repeat center/contain;
}
.index_cont_area li:nth-child(4) a:before{
    background: url(../img/main-arrow-4.png) no-repeat center/contain;
}
.index_cont_area li a img {
    display: block;
    width: 50%;
}
.index_cont_area li a img.mo {
    display: none;
}
.index_cont_area li a .right {
    width: 49%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}
.index_cont_area li a .right .index_ico {
    display: block;
    width: 2rem; height: 2rem;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}
.index_cont_area li:first-child a .right .index_ico {
    background-image: url(../img/main-icon-5.png);
}
.index_cont_area li:nth-child(2) a .right .index_ico {
    background-image: url(../img/main-icon-6.png);
}
.index_cont_area li:nth-child(3) a .right .index_ico {
    background-image: url(../img/main-icon-7.png);
}
.index_cont_area li:nth-child(4) a .right .index_ico {
    background-image: url(../img/main-icon-8.png);
}
.index_cont_area li a .right h2 {
    font-size: 19px;
    font-weight: 800;
}
.index_cont_area li a .right p {
    font-weight: 600;
    font-size: 16px;
    line-height: 1.4;
}
.index_cont_area li a .right span {
    display: block;
    width: fit-content;
    font-size: 16px;
    background: #6483BC;
    color: #fff;
    border-radius: 20px;
    padding: .5rem 1rem;
    margin-top: .7rem;
}
.index_btm_area {
    padding: 5rem 0;
    background: #F5F5F5;
}
.index_bottom {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.index_bottom li {
    width: calc(100% / 2 - .5rem);
}
.index_bottom li:first-child a{
    display: block;
    height: 18rem;
    background-color: #6483BC;
    padding: 2.5rem;
    background-image: url(../img/main-icon-2.png);
    background-repeat: no-repeat;
    background-position: 90% 80%;
    background-size: 15rem;
}
.index_bottom li a p,
.index_bottom li a p b {
    color: #fff;
}
.index_bottom li a p {
    font-size: 22px;
}
.index_bottom li a p b {
    font-size: 24px;
    display: block;
    padding-top: .3rem;
    font-weight: 600;
}
.index_bottom li:nth-child(2) {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    justify-content: space-between;
    height: 18rem;
}
.index_bottom li:nth-child(2) a {
    display: flex;
    align-items: center;
    background-color: #479EEE;
    height: calc(50% - .5rem);
    padding: 0 2.5rem;
}
.index_bottom li:nth-child(2) a:first-child {
    background-image: url(../img/main-icon-3.png);
    background-repeat: no-repeat;
    background-position: 80% 100%;
    background-size: 7.5rem;
}
.index_bottom li:nth-child(2) a:nth-child(2) {
    background-image: url(../img/main-icon-4.png);
    background-repeat: no-repeat;
    background-position: 80% 100%;
    background-size: 8rem;
}

/* sub */
.sub_cont {
    padding: 10rem 0 4rem;
}
.sub_cont h1 {
    font-size: 24px;
    font-weight: 800;
    padding: 6rem 0 3rem;
}
.sub_cont .box {
    border: 1px solid #A8B9DA;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.sub_cont .box h2 {
    font-size: 20px;
    font-weight:800;
    color: #5C7CB8;
    padding-bottom: 1rem;
}
.sub_cont .box p,
.sub_cont .box pre{
    font-size: 16px;
    line-height: 1.4;
}
.sub_cont a {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #6483BC;
    color: #fff;
    font-size: 20px;
    font-weight: 600;
    gap: 2rem;
    padding: 4rem 0;
    margin-top: 9rem;
}
.sub_cont a .arrow {
    display: block;
    width: 2rem; height: 2rem;
    background: url(../img/arrow-2.png) no-repeat center/contain;
}
.sub_cont .border {
    background: #6483BC;
    border-radius: 20px;
    padding: .5rem 1.5rem;
    color: #fff;
    width: fit-content;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 2rem;
}
.sub_cont .box ul li {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 3rem;
}
.sub_cont .box ul li:before {
    position: absolute;
    display: block;
    content: '';
    width: 13px; height: 13px;
    left: 1rem; top: 70%;
    transform: translate(-50%, -50%);
    background: url(../img/arrow-3.png) no-repeat center/contain;
    z-index: 1;
}
.sub_cont .box ul li:last-child::before {
    display: none;
}
.sub_cont .box ul li:last-child {
    padding-bottom: 0;
}
.sub_cont .box ul li .num {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    background: #6483BC;
    width: 2rem; height: 2rem;
    font-size: 18px;
    border-radius: 50%;
    box-shadow: #6483bccc 0px 0px 7px;
}
.sub_cont .box ul li .num::after {
    position: absolute;
    left: 50%; top: 0;
    content: '';
    display: block;
    width: 1px; height: 100%;
    border-left: 1px dashed #6583bc33;
    padding-bottom: 3rem;
    z-index: -1;
}
.sub_cont .box ul li:last-child .num::after {
    display: none;
}
.sub_cont .box ul li p {
    font-size: 17px;
    font-weight: 600;
    color: #6F6F6F;
}
.sub_cont pre.padding {
    padding-top: 2rem;
}
.sub_cont .border.margin {
    margin-top: 7rem;
}
.sub_cont .link {
    margin-top: 0;
    margin-bottom: 3rem;
    background-color: #479EEE;
    height: 11rem;
    padding: 0;
    justify-content: space-around;
    font-size: 23px;
}
.sub_cont .link img {
    display: block;
    height: 110%;
    margin-top: 7px;
}
.sub_cont .box h2.padding {
    padding-top: 3rem;
}
.sub_cont > pre {
    font-size: 16px;
    line-height: 1.4;
    padding-bottom: 4rem;
}

/* 반응형 */
@media screen and (min-width: 700px) and (max-width: 1230px) {
    .nav_box {
        padding: 0 1.5rem;
    }
    .index_cont {
        padding: 2rem 1.5rem;
    }
    .index_btm_area {
        padding: 5rem 1.5rem;
    }
    .nav_area li .main_menu {
        font-size: 1.6rem;
    }
    .depth_box {
        padding-bottom: 0;
        border-left: none;
        border-right: none;
    }
    .depth_box a {
        padding: 0 1.5rem;
    }
    .depth_box a span {
        font-size: 1.3rem;
        font-weight: 600;
        padding: 2rem 0;
    }
    .header_inner .back {
        left: 1.5rem;
    }
    .sub_cont {
        padding: 10rem 1.5rem 4rem;
    }
    .sub_cont h1 {
        line-height: 1.3;
    }
}
@media screen and (min-width: 300px) and (max-width: 699px) {
    .nav_box {
        padding: 0 1.5rem;
    }
    .index_cont {
        padding: 2rem 1.5rem;
    }
    .index_btm_area {
        padding: 5rem 1.5rem;
    }
    .index_long {
        padding-top: 13rem;
    }
    .nav_area li .main_menu {
        font-size: 1.6rem;
        line-height: 1.4;
    }
    .index_long .inner {
        flex-direction: column-reverse;
        gap: 3rem;
        padding: 2rem 2.5rem 3rem;
    }
    .index_long .inner .left h1 {
        text-align: center;
    }
    .index_long .inner .left p {
        text-align: center;
        letter-spacing: -.1rem;
    }
    .index_cont_area li {
        margin-bottom: 4rem;
    }
    .index_cont_area li a {
        flex-direction: column;
        justify-content: flex-start;
        gap: 5rem;
    }
    .index_cont_area li a img {
        width: 100%;
    }
    .index_cont_area li a img.pc {
        display: none;
    }
    .index_cont_area li a img.mo {
        display: block;
        height: 19rem;
    }
    .index_cont_area li a .right .index_ico {
        width: 3.5rem; height: 3.5rem;
    }
    .index_cont_area li a:before {
        width: 6rem; height: 6rem;
    }
    .index_cont_area li:last-child a:before {
        top: 46%;
    }
    .index_cont_area li a .right {
        width: 100%;
    }
    .index_bottom {
        flex-direction: column;
        gap: 1rem;
    }
    .index_bottom li {
        width: 100%;
    }
    .index_bottom li:first-child a {
        height: 12rem;
        background-size: 12rem;
    }
    .index_bottom li:nth-child(2) {
        flex-direction: row;
    }
    .index_bottom li:nth-child(2) a {
        height: 100%;
        height: 15rem;
        align-items: flex-start;
        justify-content: center;
        padding: 2rem 1.5rem;
        width: calc(50% - .5rem);
    }
    .index_bottom li:nth-child(2) a:first-child {
        background-position: 50% 100%;
    }
    .index_bottom li:nth-child(2) a:nth-child(2) {
        background-position: 50% 100%;
    }
    .index_bottom li a p {
        font-size: 1.8rem;
    }
    .index_bottom li:nth-child(1) a {
        display: flex;
        align-items: center;
    }
    .index_bottom li:nth-child(2) a p{
        text-align: center;
    }
    .index_bottom li a p b {
        font-size: 1.9rem;
    }
    .depth_box {
        padding-bottom: 0;
        border-left: none;
        border-right: none;
    }
    .depth_box a {
        padding: 0 1.5rem;
    }
    .depth_box a span {
        font-size: 1.6rem;
        font-weight: 600;
        padding: 2rem 1rem;
        line-height: 1.3;
    }
    .header_inner .back {
        left: 1.5rem;
    }
    .sub_cont {
        padding: 10rem 1.5rem 4rem;
    }
    .sub_cont h1 {
        line-height: 1.3;
        font-size: 2rem;
    }
    .index_cont_area li a .right span {
        padding: .7rem 1.5rem;
        font-size: 1.7rem;
    }
    .sub_cont .box h2 {
        font-size: 1.9rem;
    }
    .sub_cont .box ul li .num {
        width: 2.7rem; height: 2.7rem;
        font-size: 1.6rem;
    }
    .sub_cont .box ul li:before {
        left: 1.4rem;
        top: 74%;
    }
    .sub_cont .box ul li p {
        font-size: 1.5rem;
        word-break: break-all;
        max-width: 27rem;
    }
    .sub_cont .box ul li .num::after {
        top: 1rem;
    }
    .sub_cont a {
        font-size: 1.7rem;
    }
    .sub_cont .link {
        padding-left: 2rem;
        font-size: 2rem;
        line-height: 1.4;
    }
    .sub_cont .border {
        padding: .7rem 1.5rem;
        font-size: 1.7rem;
    }
}