/*-------------------------------------- intro common --------------------------------------*/
.intro_page {
    position: relative;
}
.intro_page main {
    position: relative;
    z-index: 2;
}
.intro_page ~ .footer,
body:has(.intro_page) .footer {
    margin-top: 0;
}
.intro_page .intro_section {
    padding: var(--sec-gap) 0;
}
.intro_page .intro_inner {
    padding: 0 20px;
}
.intro_page .sec_name {
    width: fit-content;
    font-size: var(--ft18);
    padding: 8px 16px;
    border: 1px solid var(--dark-line);
}
.intro_page .sec_title span {
    color: rgba(0, 0, 0, .2);
    background: linear-gradient(to right, var(--gray-bg), var(--gray-bg)) no-repeat;
    background-clip: text;
    -webkit-background-clip: text;
    background-size: 0%;
    line-height: inherit;
}
.intro_page .sec_text,
.intro_page .intro_copy {
    font-size: var(--ft18);
    line-height: 1.4;
    color: var(--gray-600);
}
.intro_page .sec_text p {
    color: inherit;
    line-height: inherit;
}
.intro_page .sec_text p + p {
    margin-top: 24px;
}
.intro_page .intro_top {
    padding-top: 250px;
}
.intro_top .sec_name {
    padding: 0;
    border: 0;
    font-size: var(--ft24);
}
.intro_page .intro_title,
.intro_page .intro_title span {
    font-size: var(--ft56);
}
.intro_page .intro_title {
    margin-bottom: 40px;
}
.intro_page .intro_top .sec_text {
    margin-top: 0;
}
.intro_page .intro_tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.intro_tags li {
    font-size: var(--ft16);
    color: var(--gray-500);
    background-color: var(--gray-200);
    padding: 8px 24px;
    border-radius: 30px;
}
.intro_page .intro_black .sec_name {
    color: var(--white);
    border-color: rgba(255,255,255,.3);
}
.intro_page .intro_black .sec_title span {
    color: rgba(255,255,255,.2);
    background-image: linear-gradient(to right,var(--white),var(--white));
}
.intro_page .intro_black .sec_text,
.intro_page .intro_black .intro_copy {
    color: var(--white);
}

/*-------------------------------------- about --------------------------------------*/
.about_fields {
    display: flex;
    gap: 28px;
    align-items: center;
    margin: 40px 0 80px;
}
.about_fields > p {
    font-size: var(--ft18);
    font-weight: var(--semi-bold);
    color: var(--gray-600);
    flex-shrink: 0;
}
.about_sign {
    aspect-ratio: 1520 / 585;
    overflow: hidden;
}
.about_meaning {
    padding-bottom: 300px !important;
}
.meaning_art {
    display: flex;
    justify-content: center;
    gap: 140px;
    margin-top: 140px;
    position: relative;
}
.meaning_art::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 90px;
    top: 75px;
    background-color: var(--gray-200);
}
.meaning_art figure {
    position: relative;
}
.meaning_art img {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
}
.meaning_art figcaption {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: center;
    margin-top: 76px;
    font-size: var(--ft22);
    color: var(--gray-600);
}
.meaning_art strong {
    font-size: var(--ft36);
    font-weight: var(--semi-bold);
    color: var(--primary);
}
.about_focus {
    background: var(--gray-bg) url('/images/about-focus.png') center / cover no-repeat;
    overflow: hidden;
    padding: 175px 0 0 !important;
}
.focus_clock {
    width: 100%;
    max-width: 1220px;
    margin: 160px auto 0;
    position: relative;
    aspect-ratio: 2 / 1;
    overflow: hidden;
}
.focus_clock > img {
    display: block;
    height: fit-content;
    object-fit: contain;
    opacity: 0;
}
.focus_copy {
    position: absolute;
    top: 43%;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 0 20px;
}
.focus_copy h3 {
    font-size: var(--ft28);
    font-weight: var(--semi-bold);
    color: var(--white);
    line-height: 1.4;
    margin-bottom: 28px;
}
.focus_copy p {
    font-size: var(--ft18);
    line-height: 1.4;
    color: var(--white);
}
.approach_list {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 100px 40px;
    margin-top: 100px;
}
.approach_box {
    border-left: 2px solid var(--gray-300);
    padding: 0 40px;
}
.approach_box h3 {
    font-size: var(--ft24);
    font-weight: var(--semi-bold);
    margin-bottom: 24px;
}
.about_activity {
    padding-top: 40px !important;
}
.activity_list {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 40px;
    margin-top: 32px;
}
.activity_photo {
    aspect-ratio: 720/600;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: end;
}
.activity_photo::before {
    content: '';
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 75%;
    background-color: var(--gray-200);
}
.activity_photo img {
    width: 83.333%;
    height: 100%;
    object-fit: contain;
    position: relative;
}
.activity_info {
    padding-top: 32px;
}
.activity_name {
    font-size: var(--ft32);
    font-weight: var(--semi-bold);
    display: flex;
    align-items: baseline;
    gap: 12px;
}
.activity_name span {
    font-size: var(--ft20);
    font-weight: var(--medium);
}
.activity_info ul {
    margin: 20px 0 50px;
}
.activity_info li {
    font-size: var(--ft18);
    color: var(--gray-600);
    line-height: 1.4;
    padding-left: 12px;
    position: relative;
}
.activity_info li + li {
    margin-top: 16px;
}
.activity_info li::before {
    content: '·';
    position: absolute;
    left: 0;
}
.intro_page .link_btn a {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 26px;
}
.intro_page .link_btn .btn_hover {
    width: 18px;
    height: 18px;
}
.about_media {
    padding-top: 40px !important;
}
.about_media_top {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 40px;
}
.about_media_top .link_btn {
    flex-shrink: 0;
}
.channel_box {
    margin-top: 80px;
    padding: 50px;
    display: flex;
    align-items: center;
    gap: 28px;
    background-color: var(--gray-200);
}
.channel_mark {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
}
.channel_text {
    flex: 1;
}
.channel_text h3 {
    font-size: var(--ft22);
    font-weight: var(--semi-bold);
    margin-bottom: 16px;
}
.channel_box > a {
    width: auto;
    height: auto;
    padding: 12px 32px;
    background-color: var(--gray-600);
    color: var(--white);
    font-size: var(--ft18);
    font-weight: var(--semi-bold);
    flex-shrink: 0;
}

/*-------------------------------------- common search / links --------------------------------------*/
.intro_search {
    padding: 160px 20px 150px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.intro_search::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/images/search-bg.png') center / cover no-repeat;
}
.intro_search_inner {
    position: relative;
    max-width: 722px;
    margin: 0 auto;
}
.intro_search h2 {
    font-size: var(--ft36);
    color: var(--white);
    font-weight: var(--semi-bold);
    line-height: 1.2;
}
.intro_search .search_box {
    max-width: none;
    background: rgba(255,255,255,.1);
    margin-top: 50px;
    padding-left: 24px;
}
.intro_search input {
    color: var(--white);
    height: 100%;
}
.intro_search .search_btn {
    background-color: var(--primary);
}
.intro_keywords {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 40px;
}
.intro_keywords a {
    width: auto;
    height: auto;
    color: var(--white);
    font-size: var(--ft16);
    opacity: .6;
}
.intro_links {
    padding: 60px 0 180px;
}
.intro_link_list {
    display: grid;
    grid-template-columns: repeat(4,minmax(0,1fr));
    gap: 40px;
}
.intro_link_box {
    min-height: 280px;
    background-color: var(--gray-200);
    border: 1px solid var(--gray-200);
    position: relative;
    transition: background .4s ease, border .4s ease;
}
.intro_link_box a {
    display: block;
    height: 100%;
    padding: 40px;
    position: relative;
    z-index: 1;
}
.intro_link_box h3 {
    font-size: var(--ft22);
    font-weight: var(--semi-bold);
    margin-bottom: 10px;
}
.intro_link_box p {
    font-size: var(--ft18);
    color: var(--gray-600);
    line-height: 1.4;
}
.intro_link_box .link_arrow {
    width: 28px;
    height: 28px;
    position: absolute;
    bottom: 40px;
    right: 40px;
}
.intro_link_box .tile_mark {
    width: auto;
    height: auto;
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity .6s ease;
}

.intro_link_box:hover {
    background-color: var(--white);
    border-color: var(--gray-400);
}
.intro_link_box:hover .tile_mark {
    opacity: 1;
}
@media all and (max-width:1400px) {
    .intro_link_list {
        gap: 20px;
    }
    .intro_link_box a {
        padding: 28px;
    }
    .intro_link_box .link_arrow {
        bottom: 28px;
        right: 28px;
    }
    .channel_box {
        padding: 32px;
    }
}
@media all and (max-width:1200px) {
    .intro_page .intro_top {
        padding-top: 180px;
    }
    .intro_page .intro_title,
    .intro_page .intro_title span {
        font-size: var(--ft48);
    }
    .about_fields {
        flex-wrap: wrap;
        margin-bottom: 60px;
    }
    .meaning_art {
        gap: 80px;
    }
    .about_meaning {
        padding-bottom: var(--sec-gap) !important;
    }
    .focus_clock {
        margin-top: 100px;
    }
    .channel_box {
        flex-wrap: wrap;
    }
    .intro_link_box {
        min-height: 250px;
    }
}
@media all and (max-width:900px) {
    .intro_page .intro_inner {
        padding: 0;
        gap: 10px;
    }
    .intro_page .intro_top {
        padding-top: 150px;
    }
    .intro_page .intro_title,
    .intro_page .intro_title span {
        font-size: var(--ft40);
    }
    .intro_page .sec_text,
    .intro_page .intro_copy {
        font-size: var(--ft16);
        line-height: 1.6;
    }
    .intro_page .sec_text br {
        display: none;
    }
    .about_fields {
        margin: 30px 0 40px;
        gap: 20px;
    }
    .intro_tags li {
        padding: 8px 16px;
        font-size: var(--ft14);
    }
    .meaning_art {
        margin-top: 70px;
        gap: 60px;
    }
    .meaning_art figure {
        width: 30%;
    }
    .meaning_art img {
        height: auto;
    }
    .meaning_art::before {
        top: 30%;
        height: 50px;
    }
    .meaning_art figcaption {
        margin-top: 30px;
        font-size: var(--ft18);
    }
    .meaning_art strong {
        font-size: var(--ft28);
    }
    .about_focus {
        padding-top: 100px !important;
    }
    .focus_clock {
        margin-top: 70px;
        min-height: 340px;
    }
    .focus_copy {
        top: 28%;
    }
    .focus_copy h3 {
        font-size: var(--ft24);
    }
    .focus_copy p {
        font-size: var(--ft16);
    }
    .focus_copy br {
        display: none;
    }
    .approach_list {
        gap: 50px 30px;
        margin-top: 60px;
    }
    .approach_box {
        padding: 0 20px;
    }
    .approach_box h3 {
        font-size: var(--ft20);
        margin-bottom: 16px;
    }
    .activity_list {
        gap: 24px;
    }
    .activity_name {
        font-size: var(--ft28);
        flex-wrap: wrap;
    }
    .activity_info li {
        font-size: var(--ft16);
    }
    .about_media_top {
        display: block;
    }
    .about_media_top .link_btn {
        margin-top: 30px;
    }
    .channel_box {
        margin-top: 40px;
        padding: 24px;
        gap: 20px;
    }
    .channel_mark {
        width: 64px;
        height: 64px;
    }
    .channel_box > a {
        margin-left: auto;
    }
    .intro_search {
        padding: 100px 20px;
    }
    .intro_search h2 {
        font-size: var(--ft28);
    }
    .intro_links {
        padding: 40px 0 100px;
    }
    .intro_link_list {
        grid-template-columns: repeat(2,minmax(0,1fr));
    }
}
@media all and (max-width:600px) {
    .intro_page .intro_title,
    .intro_page .intro_title span {
        font-size: var(--ft32);
    }
    .intro_page .intro_title {
        margin-bottom: 28px;
    }
    .intro_top .sec_name {
        font-size: var(--ft18);
    }
    .intro_page .sec_name {
        font-size: var(--ft14);
    }
    .about_sign {
        aspect-ratio: 1.8;
    }
    .about_sign img {
        width: 100%;
        height: 100%;
        margin: 0;
        object-fit: cover;
    }

    .focus_clock {
        margin-top: 60px;
        margin-bottom: 20px;
        aspect-ratio: 1 / 1;
    }
    .focus_copy {
        top: 50%;
        transform: translateY(-50%);
    }
    .focus_copy h3 {
        font-size: var(--ft20);
    }

    .approach_list,
    .activity_list {
        grid-template-columns: 1fr;
    }
    .activity_list {
        gap: 60px;
    }
    .activity_info ul {
        margin-bottom: 30px;
    }
    .activity_info li + li {
        margin-top: 10px;
    }

    .channel_box {
        flex-direction: column;
        align-items: start;
    }
    .channel_box > a {
        width: 100%;
        text-align: center;
        font-size: var(--ft16);
    }
    .channel_text {
        flex-basis: calc(100% - 90px);
    }
    .channel_text .intro_copy {
        font-size: var(--ft14);
    }
    .intro_search .search_box {
        margin-top: 30px;
    }
    .intro_keywords {
        gap: 16px;
        margin-top: 24px;
    }
    .intro_link_box {
        min-height: 160px;
    }
    .intro_link_box a {
        padding: 20px;
    }
    .intro_link_box h3 {
        font-size: var(--ft18);
    }
    .intro_link_box p {
        font-size: var(--ft14);
    }
    .intro_link_box .tile_mark {
        display: none;
    }
    .intro_link_box .link_arrow {
        width: 22px;
        height: 22px;
        bottom: 16px;
        right: 16px;
    }
}