.footer {
    margin-top: 0;
}
.bg {
    background-color: var(--white);
}
.sec_name {
    margin-bottom: 40px;
    font-size: var(--ft24);
    font-weight: var(--semi-bold);
    color: var(--primary);
    transform: translateY(20px);
    opacity: 0;
}
.sec_title {
    transform: translateY(20px);
    opacity: 0;
}
.sec_title,
.sec_title span {
    font-size: var(--ft50);
    font-weight: var(--semi-bold);
    color: var(--gray-400);
}
.sec_title strong {
    font-size: var(--ft50);
    font-weight: var(--semi-bold);
    color: var(--gray-600);
}

/*----------------------- sec1 -----------------------*/
.sec1 {
    padding: 10px;
}
.sec1_inner {
    height: 100%;
    border-radius: var(--radius-lg);
    position: relative;
}
.main_bg {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.main_bg img {
    transform: scale(1.2);
    animation: bg 6s ease forwards;
}
@keyframes bg {
    to {
        transform: scale(1);
    }
}
.main_inner {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.25) 0%, rgba(0, 0, 0, 0.10) 100%);
    position: absolute;
    top: 0;
    left: 0;
}
.sticky {
    padding-top: 220px;
    padding-bottom: 100px;
    display: flex;
    justify-content: space-between;
    align-items: start;
    position: sticky;
    top: 0;
    left: 0;
}
.main_title {
    font-size: var(--ft80);
    font-weight: var(--semi-bold);
    color: var(--white);
    transform: translateX(-20px);
    opacity: 0;
    transition: font-size .5s ease;
}
.main_text {
    margin-top: 60px;
    font-size: var(--ft24);
    color: var(--white);
    transform: translateX(-20px);
    opacity: 0;
    transition: font-size .5s ease, margin .5s ease;
}
.main_text strong {
    font-weight: var(--semi-bold);
    position: relative;
    color: var(--white);
}
.main_text strong::before {
    content: '';
    display: block;
    width: 0%;
    height: 100%;
    background-color: var(--primary);
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    transition: width 1s .3s ease;
}
.main_text.show strong::before {
    width: 100%;
}
.sticky.scroll .main_title {
    font-size: var(--ft60);
}
.sticky.scroll .main_text {
    margin-top: 40px;
    font-size: var(--ft20);
}
.scroll_down {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--white-200);
    border: 1px solid var(--white-500);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    box-sizing: border-box;
}
.scroll_down img {
    width: 50px;
    height: 50px;
    transform: translateY(-5px);
    animation: scroll 1s alternate infinite;
}
@keyframes scroll {
    to {
        transform: translateY(5px);
    }
}
.scroll_svg {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transform: rotate(-90deg);
}
.scroll_svg circle {
    stroke-width: 2px;
    stroke: var(--white);
    fill: none;
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
}

/*----------------------- sec2 -----------------------*/
.sec2 {
    padding: 10px;
}
.sec2_inner {
    width: 100%;
    padding: 100px 0;
    background-color: var(--primary);
    border-radius: var(--radius-lg);
}
.sec2 h2 {
    font-size: var(--ft28);
    font-weight: var(--semi-bold);
    color: var(--white);
}
.vision_list {
    margin-top: 60px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.vision_box {
    width: 100%;
    padding: 70px 40px 60px;
    border-radius: var(--radius-md);
    background-color: var(--white);
    transform: translateY(20px);
    opacity: 0;
}
.vision_num {
    margin-bottom: 80px;
    font-size: var(--ft24);
    font-weight: var(--semi-bold);
    color: var(--gray-400);
}
.vision_title {
    margin-bottom: 32px;
    font-size: var(--ft32);
    font-weight: var(--semi-bold);
    color: var(--primary);
}
.vision_text {
    font-size: var(--ft22);
    color: var(--gray-500);
}

/*----------------------- sec3 -----------------------*/
.sec3 {
    padding-top: 240px;
    padding-bottom: 200px;
    overflow: hidden;
}

.logo_mark {
    width: 70%;
    max-width: 860px;
    aspect-ratio: 1 / 1;
    opacity: .1;
    position: absolute;
    top: 0;
    right: 0;
    transform: translateY(100%) rotate(45deg);
}


.department_wrap {
    width: 100%;
    padding: 100px 0;
    margin-top: 120px;
    border-radius: var(--radius-lg);
    background-color: var(--primary-bg);
    position: relative;
    z-index: 1;
}
.department_box {
    width: 360px;
    padding: 36px;
    background-color: var(--white);
    border-radius: var(--radius-lg);
    position: relative;
    opacity: 0;
}
.department_name {
    font-size: var(--ft24);
    font-weight: var(--semi-bold);
}
.department_text {
    margin-top: 16px;
    font-size: var(--ft20);
    color: var(--gray-500);
}

.department_box.ceo_box {
    margin: 0 auto;
    background-color: var(--primary);
}
.department_box.ceo_box .department_name {
    color: var(--white);
}
.department_box.ceo_box .ceo {
    width: fit-content;
    margin: 0 auto 16px;
    padding: 4px 10px;
    border-radius: 30px;
    background-color: var(--white);
    font-size: var(--ft16);
    font-weight: var(--semi-bold);
    color: var(--primary);
}

.department_wrap .center {
    padding: 80px 0;
    display: flex;
    justify-content: center;
    position: relative;
}
.department_wrap .center::before {
    content: '';
    display: block;
    width: 1px;
    height: 100%;
    background-color: var(--primary);
    opacity: .5;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}
.department_box.right_box {
    width: fit-content;
    transform: translateX(calc(50% + 80px));
}
.department_box.right_box::before {
    content: '';
    display: block;
    width: 80px;
    height: 1px;
    background-color: var(--primary);
    opacity: .5;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(-100%, -50%);
}
.department_box.right_box::after {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(-50%, -50%);
}
.department_list {
    width: fit-content;
    margin: 0 auto;
    padding-top: 80px;
    display: flex;
    justify-content: center;
    gap: 140px;
    position: relative;
}
.department_list::before {
    content: '';
    display: block;
    width: calc(100% - 360px);
    height: 80px;
    border: 1px solid var(--primary);
    border-radius: 20px 20px 0 0 ;
    border-bottom: none;
    opacity: .5;
    position: absolute;
    top: 0;
}
.department_list .department_box:nth-child(2)::before {
    content: '';
    display: block;
    width: 1px;
    height: 80px;
    background-color: var(--primary);
    opacity: .5;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -100%);
}
.department_list .department_box::after {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
}

/*----------------------- sec4 -----------------------*/
.sec4 {
    width: 100%;
    height: 150vh;
    position: relative;
    overflow: hidden;
    z-index: -1;
}
.video_bg {
    width: 100%;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
}
.video_bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.video_inner {
    width: 100%;
    height: 100%;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}
.video_inner .sec_title span {
    color: var(--white);
    transform: translateY(20px);
    opacity: 0;
    display: inline-block;
}

/*----------------------- sec5 -----------------------*/
.sec5 {
    padding-top: 240px;
    overflow: hidden;
}
.logo_s_mark {
    width: 120px;
    height: 120px;
    margin: 0 auto 60px;
    transform: scale(0);
}

.patent_swiper {
    width: 100%;
    max-width: 1360px;
    margin: 100px auto 0;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
}
.patent_box {
    width: 100%;
    max-width: 400px;
    opacity: .5;
    transition: opacity .5s ease;
}
.patent_img {
    width: 100%;
    aspect-ratio: 40 / 58;
    border-radius: var(--radius-ss);
    box-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.10);
    overflow: hidden;
}
.patent_title {
    width: 100%;
    padding: 16px;
    margin-top: 20px;
    border-radius: var(--radius-ss);
    background-color: var(--gray-300);
    font-size: var(--ft20);
    font-weight: var(--semi-bold);
    color: var(--white);
    text-align: center;
    transition: background .5s ease;
}
.patent_box.swiper-slide-prev,
.patent_box.swiper-slide-next,
.patent_box.swiper-slide-active {
    opacity: 1;
}
.patent_box.swiper-slide-prev .patent_title,
.patent_box.swiper-slide-next .patent_title,
.patent_box.swiper-slide-active .patent_title {
    background-color: var(--primary);
}

.swiper_btn_wrap {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: absolute;
    top: 50%;
    transform: translateY(calc(-50% - 60px));
    left: 0;
    z-index: 1;
    pointer-events: none;
}
.swiper_btn {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-ss);
    background-color: var(--white);
    border: 1px solid var(--dark-line);
    box-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.10);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    pointer-events: all;
    transition: background .5s ease;
}
.swiper_btn:hover {
    background-color: var(--gray-100);
}
.swiper_btn.prev_btn {
    transform: translateX(calc(-80px - 30px));
}
.swiper_btn.next_btn {
    transform: translateX(calc(80px + 30px));
}
.swiper_btn.prev_btn img {
    transform: rotate(180deg);
}
.swiper_btn img {
    width: 30px;
    height: 30px;
}

/*----------------------- sec6 -----------------------*/
.sec6 {
    padding-top: 300px;
    padding-bottom: 200px;
    overflow: hidden;
}

.project_wrap {
    margin-top: 120px;
    display: flex;
    gap: 100px;
}
.project_line {
    width: 4px;
    background-color: var(--primary-bg);
    border-radius: 2px;
    flex-shrink: 0;
}
.project_line .line {
    width: 100%;
    height: 0%;
    background-color: var(--primary);
    border-radius: 2px;
    position: relative;
}
.project_line .line::after {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    background-color: var(--white);
    border-radius: 50%;
    border: 4px solid var(--primary);
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 50%);
}
.project_list {
    width: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.project_box {
    display: flex;
    gap: 10px;
    transform: translateX(20px);
    opacity: 0;
}
.project_date {
    width: 300px;
    padding: 20px 36px;
    border-radius: var(--radius-ss);
    background-color: var(--primary-bg);
    font-size: var(--ft20);
    font-weight: var(--medium);
    color: var(--primary);
    flex-shrink: 0;
}
.project_r {
    width: 100%;
    min-width: 0;
    padding: 20px 40px;
    border-radius: var(--radius-ss);
    border: 1px solid var(--dark-line);
    display: flex;
    align-items: center;
    gap: 50px;
}
.organization {
    width: 400px;
    font-size: var(--ft20);
    font-weight: var(--semi-bold);
    flex-shrink: 0;
}
.content {
    font-size: var(--ft20);
    color: var(--gray-500);
}

.partner_list {
    overflow: visible;
}

@media all and (max-width: 1600px) {
    .sec_title, 
    .sec_title span,
    .sec_title strong {
        font-size: var(--ft45);
    }

    /*-- sec1 --*/
    .main_title {
        font-size: var(--ft60);
    }
    .main_text {
        margin-top: 40px;
        font-size: var(--ft20);
    }

    /*-- sec2 --*/
    .vision_num {
        margin-bottom: 40px;
    }
    .vision_title {
        font-size: var(--ft28);
    }
    .vision_text {
        font-size: var(--ft20);
    }

    /*-- sec3 --*/
    .logo_mark {
        width: 50%;
    }
    .department_list {
        gap: 70px;
    }

    /*-- sec6 --*/
    .project_date {
        display: flex;
        align-items: center;
    }
    .project_r {
        flex-direction: column;
        align-items: start;
        gap: 10px;
    }
}

@media all and (max-width: 1400px) {
    .sec_title, 
    .sec_title span,
    .sec_title strong {
        font-size: var(--ft40);
    }

    /*-- sec2 --*/
    .vision_list {
        grid-template-columns: repeat(2, 1fr);
    }
    .vision_box {
        padding: 30px;
    }
    .vision_num {
        margin-bottom: 24px;
        text-align: right;
    }
    .vision_title {
        margin-bottom: 16px;
        font-size: var(--ft20);
    }
    .vision_text {
        font-size: var(--ft18);
    }

    /*-- sec3 --*/
    .department_wrap {
        padding: 80px 20px;
    }
    .department_list {
        gap: 30px;
    }
    .department_list .department_box {
        width: 100%;
    }
    .department_list::before {
        width: calc(100% - ((100% - 60px) / 3));
    }
    .department_box {
        padding: 24px;
    }
    .department_name {
        font-size: var(--ft20);
    }
    .department_text {
        font-size: var(--ft18);
    }
}

@media all and (max-width: 1200px) {
    /*-- sec3 --*/
    .sec3  {
        padding-top: 200px;
    }
    .department_wrap {
        padding: 40px 20px;
    }
    .department_box {
        width: 300px;
    }
    .department_wrap .center {
        padding: 40px 0;
    }
    .department_list {
        padding-top: 40px;
    }
    .department_list .department_box:nth-child(2)::before {
        height: 40px;
    }
    .department_box.right_box {
        transform: translateX(calc(50% + 40px));
    }
    .department_box.right_box::before {
        width: 40px;
    }
    .department_text {
        margin-top: 10px;
    }

    /*-- sec6 --*/
    .project_wrap {
        margin-top: 80px;
        gap: 50px;
    }
    .project_date {
        width: 160px;
        padding: 20px;
    }
    .project_r {
        padding: 20px;
    }
    .content {
        font-size: var(--ft18);
    }
}

@media all and (max-width: 1024px) {
    .sec_name {
        margin-bottom: 32px;
        font-size: var(--ft20);
    }
    .sec_title, 
    .sec_title span, 
    .sec_title strong {
        font-size: var(--ft32);
    }

    /*-- sec3 --*/
    .logo_mark {
        display: none;
    }
    .department_wrap {
        margin-top: 60px;
    }
    .department_box {
        width: 100% !important;
    }
    .department_box.ceo_box {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 10px;
    }
    .department_box.ceo_box .ceo {
        margin: 0;
    }
    .department_wrap .center {
        padding: 10px 0;
    }
    .department_wrap .center::before {
        display: none;
    }
    .department_box.right_box {
        transform: translateX(0);
    }
    .department_box.right_box::before,
    .department_box.right_box::after {
        display: none;
    }
    .department_list {
        width: 100%;
        padding-top: 0;
        flex-direction: column;
        gap: 10px;
        text-align: left;
    }
    .department_list::before,
    .department_list .department_box:nth-child(2)::before,
    .department_list .department_box::after {
        display: none;
    }
}

@media all and (max-width: 768px) {
    .sec_name {
        margin-bottom: 24px;
        font-size: var(--ft18);
    }
    .sec_title, 
    .sec_title span, 
    .sec_title strong {
        font-size: var(--ft24);
    }

    /*-- sec1 --*/
    .sec1 {
        height: 100svh;
    }
    .main_text,
    .sticky.scroll .main_text {
        margin-top: 24px;
    }
    .main_title,
    .sticky.scroll .main_title {
        font-size: var(--ft32);
    }
    .main_text,
    .sticky.scroll .main_text {
        font-size: var(--ft16);
    }
    .sticky {
        height: 100%;
        padding-top: 100px;
        padding-bottom: 40px;
        flex-direction: column;
        justify-content: space-between;
    }
    .scroll_down {
        width: 40px;
        height: 40px;
    }
    .scroll_down img {
        width: 24px;
        height: 24px;
    }

    /*-- sec2 --*/
    .sec2_inner {
        padding: 40px 0;
    }
    .sec2 h2 {
        font-size: var(--ft24);
    }
    .vision_list {
        margin-top: 20px;
        grid-template-columns: repeat(1, 1fr);
        gap: 10px;
    }
    .vision_box {
        padding: 20px;
    }
    .vision_num {
        font-size: var(--ft20);
    }
    .vision_title {
        margin-bottom: 10px;
        font-size: var(--ft18);
    }
    .vision_text {
        font-size: var(--ft16);
    }

    /*-- sec3 --*/
    .sec3 {
        padding-top: var(--sec-gap);
        padding-bottom: var(--sec-gap);
    }
    .department_wrap {
        margin-top: 40px;
    }
    .department_box {
        padding: 16px;
    }
    .department_box.ceo_box .ceo {
        padding: 2px 6px;
        font-size: var(--ft14);
    }
    .department_name {
        font-size: var(--ft18);
    }
    .department_text {
        font-size: var(--ft16);
    }

    /*-- sec5 --*/
    .sec5 {
        padding-top: var(--sec-gap);
    }
    .logo_s_mark {
        width: 50px;
        height: 50px;
        margin-bottom: 32px;
    }
    .patent_swiper {
        margin-top: 40px;
    }
    .patent_box {
        max-width: 100%;
    }
    .patent_title {
        margin-top: 10px;
        padding: 10px;
        font-size: var(--ft14);
    }

    /*-- sec6 --*/
    .sec6 {
        padding-top: var(--sec-gap);
        padding-bottom: 100px;
    }
    .project_wrap {
        margin-top: 40px;
    }
    .project_line {
        display: none;
    }
    .project_box {
        flex-direction: column;
    }
    .project_date {
        width: 100%;
        padding: 10px;
        font-size: var(--ft16);
    }
    .project_r {
        padding: 10px;
    }
    .organization {
        font-size: var(--ft18);
    }
    .content {
        font-size: var(--ft16);
    }
}