.banner_main img {
    width: 100%;
    max-height: 100dvh;
    object-fit: cover;
}

.banner_main .swiper-slide {
    display: flex;
}

.banner_text {
    position: absolute;
    top: 50%;
    color: #fff;
    max-width: 1274px;
    left: 50%;
    text-align: left;
    transform: translate(-50%, -50%);
    text-shadow: 4px 4px 5px rgba(0, 0, 0, 0.20);
}

.banner_text h2 {
    font-size: 102px;
    font-weight: 500;
    line-height: 100px; /* 98.039% */
    letter-spacing: -0.4px;
    max-width: 980px;
    margin-bottom: 58px;
}

.banner_text p {
    font-size: 36px;
    font-style: normal;
    font-weight: 300;
    line-height: normal;
    letter-spacing: -0.4px;
    max-width: 612px;
}

.banner_main .swiper-pagination-progressbar {
    max-width: 1274px;
    bottom: 206px;
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 44px;
    background: rgba(255, 255, 255, 0.30);
}

.banner_main .image-slider__fraction {
    position: absolute;
    max-width: 1274px;
    bottom: 220px;
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    text-align: left;
    z-index: 9;
    width: 100%
}

.banner_main .swiper-container {
    position: relative;
}

.banner_main .swiper-pagination-progressbar .swiper-pagination-progressbar-fill {
    background: #fff;
    border-radius: 44px;
}

.banner_main .swiper-container {
    position: relative;
}

.image-slider__current {
    color: #FFF;
    font-size: 55px;
    font-weight: 700;
    line-height: normal;
}

.image-slider__current span {
    font-size: 40px;
    font-weight: 400;
    line-height: normal;
    margin-left: 15px;
}

.image-slider__current span.total_slide {
    color: rgba(255, 255, 255, 0.70);
    font-size: 28px;
    font-weight: 400;
    line-height: normal;
}

/* .introduction {
    padding: 170px auto 120px;
} */

.intro_wrap {
    margin-top: 30px;
    position: relative;
}

.intro_right {
    width: 745px;
    position: absolute;
    right: 0;
    top: 0;
    z-index: 9;
}

.intro_right a {
    display: flex;
    position: relative;
}

.intro_left {
    max-width: 978px;
}

.intro_left h2 {
    color: #000;
    font-size: 52px;
    font-style: normal;
    font-weight: 600;
    line-height: 64px;
    margin-bottom: 32px;
}

.intro_left p {
    color: #000;
    font-size: 30px;
    font-style: normal;
    font-weight: 300;
    line-height: normal;
}

.intro_right .yt_icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.intro_bottom {
    margin-top: 50px;
    padding: 116px 24px 55px;
    background: url('../images/intro_bg.png') no-repeat;
}

.intro_bottom p {
    color: rgba(255, 255, 255, 0.90);
    font-size: 18px;
    font-weight: 600;
    line-height: normal;
    margin-bottom: 42px;
}

.intro_bottom a {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    line-height: normal;
    padding: 21px 16px;
    min-width: 236px;
    display: inline-flex;
    border-radius: 0px 12px;
    border: 2px solid #FFF;
    align-items: center;
    justify-content: space-between;
}

.intro_bottom a:hover {
    background: #fff;
    color: #00579C;
    transition: .5s ease;
}

a svg.on_hover {
    display: none;
}

a:hover svg.no_hover {
    display: none;
}

a:hover svg.on_hover {
    display: block;
}

.research_field {
    background: #f4f4f4 url('../images/research_bg.png') bottom no-repeat;
}

.research_field .container {
    display: grid;
    grid-template-rows: max-content minmax(0, 1fr);
    height: 100%;
    padding-top: 116px;
}

.research_list {
    margin-top: 50px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.research_item h2 {
    color: #FFF;
    text-shadow: 4px 4px 4px rgba(0, 0, 0, 0.25);
    font-size: 42px;
    font-weight: 600;
    line-height: normal;
    margin: 56px auto;
}

.research_content {
    color: #fff;
    display: none;
}

.research_item {
    padding: 0 35px;
    position: relative;
    max-height: 636px;
}

.research_content p {
    font-size: 16px;
    font-weight: 400;
    line-height: normal;
    margin-bottom: 28px;
}

.research_content li {
    font-size: 16px;
    font-weight: 500;
    line-height: normal;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.20);
    margin-bottom: 10px;
    width: fit-content;
}

.research_item .btn.view_more {
    border: 0;
    position: absolute;
    box-sizing: border-box;
    bottom: 56px;
    min-width: 300px;
    color: #fff;
    display: none;
}

.research_item:hover .research_content {
    display: block;
    transition: .3s ease;
}

.research_item:hover .btn.view_more {
    display: inline-flex;
}

.research_item::before {
    content: "";
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
    background: #00000099;
    max-height: 636px;
    opacity: 0;
    visibility: hidden;
    z-index: 0;
}

.research_item:hover::before {
    opacity: 1;
    visibility: visible;
    transition: .3s ease;
}

.research_item h2, 
.research_item .research_content {
    z-index: 9;
    position: relative;
}

/* .infomation {
    padding: 170px 0 245px;
} */

.infomation_wrap {
    margin-top: 50px;
    display: flex;
    gap: 48px;
}

.info_item {
    width: calc((100% - 48px) / 2);
}

.info_title h2 {
    color: #000;
    font-size: 32px;
    font-weight: 700;
    line-height: normal;
}

.info_title a {
    color: #FFF;
    font-size: 18px;
    font-weight: 400;
    line-height: normal;
    padding: 7px 20px;
    border-radius: 4px;
    background: #00579C;
}

.info_title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 32px;
    border-bottom: 2px solid #00579C;
}

.info_item li {
    border-bottom: 1px solid #989898;
    padding: 0 8px;
}

.info_item li a {
    display: grid;
    grid-template-columns: 85px minmax(0, 1fr) 112px;
    align-items: center;
}

.info_item p.info_name {
    color: #000;
    font-size: 18px;
    font-weight: 400;
    line-height: normal;
    letter-spacing: 0.18px;
    text-align: left;
    padding: 26px 0;
}

.info_item p {
    color: #989898;
    font-size: 16px;
    font-weight: 400;
    line-height: normal;
    letter-spacing: 0.48px;
    text-align: right;
}

.info_item li span {
    color: #000;
    text-align: center;
    font-size: 16px;
    font-weight: 700;
    line-height: normal;
    width: 55px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info_item li span.notification {
    color: #fff;
    border-radius: 5px;
    background: #00579C;
}

.professor_section {
    /* padding: 280px 0 155px; */
    background: url('../images/professor_bg.png') bottom no-repeat;
    color: #fff;
    background-size: 100%;
}

.professor_section p {
    font-size: 18px;
    font-weight: 600;
    line-height: 24px;
}

.professor_top {
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.80);
    padding: 40px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 24px;
}

.professor_top h2 {
    color: #000;
    font-size: 24px;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 16px;
}

.professor_top p {
    color: #797979;
}

.professor_top div + div {
    display: flex;
    gap: 27px;
}

.professor_bottom {
    display: flex;
    gap: 24px;
}

.professor_item {
    width: calc((55% - 48px) / 2);
    padding: 40px;
    border-radius: 5px;
    border: 2px solid #FFF;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.professor_bottom .professor_item:first-child {
    width: 45%;
}

.professor_content h2 {
    font-size: 24px;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 16px;
}

.professor_action {
    margin-top: 35px;
}

.professor_action a + a {
    margin-top: 12px;
}

.main_page #fp-nav ul li a span, 
.main_page .fp-slidesNav ul li a span {
    background: #ccc;
    width: 9px;
    height: 9px;
}

.main_page #fp-nav ul li a.active span, 
.main_page .fp-slidesNav ul li a.active span {
    background: #2E79EB;
    margin: -2px 0 0 -2px;
    width: 9px;
    height: 9px;
}

@media(min-width: 1200px) {
    .footer_section.section,
    .footer_section .fp-tableCell {
        height: 151px !important;
    }
}

@media(max-width: 1200px) {
    .main_page .section,
    .main_page .fp-tableCell {
        height: auto !important;
    }

    .main_page .section:not(.banner_main):not(.professor_section):not(.footer_section) {
        margin: 80px 0;
    }

    .main_page .section.professor_section {
        padding: 80px 0 !important;
    }

    .research_field .container {
        padding: 0;
    }

    .research_item {
        min-height: 500px;
    }

    .banner_main .swiper-pagination-progressbar {
        width: calc(100% - 30px);
    }
    
    .banner_main .image-slider__fraction {
        width: calc(100% - 30px);
    }

    .banner_text h2 {
        font-size: 70px;
    }

    .banner_text p {
        font-size: 30px;
    }

    .introduction {
        padding: 100px auto;
    }

    .intro_right {
        position: static;
        margin-top: 40px;
        width: 100%;
        display: flex;
        justify-content: center;
    }
    
    .intro_left h2 {
        font-size: 40px;
        margin-bottom: 20px;
    }
    
    .intro_left h2 br {
        display: none;
    }
    
    .intro_left p {
        font-size: 24px;
    }
    
    .intro_left p br {
        display: none;
    }
    
    .intro_left {
        width: 100%;
        max-width: unset;
    }

    .research_field {
        padding: 80px 15px;
    }
    
    .research_item h2 {
        font-size: 28px;
        margin: 30px auto;
    }
/*     
    .infomation {
        padding: 100px 0;
    } */
}

@media(max-width: 1023px) {
    .research_item .btn.view_more {
        bottom: 30px;
    }

    .banner_main .swiper-pagination-progressbar {
        bottom: 50px;
    }
    
    .banner_main .image-slider__fraction {
        bottom: 60px;
    }
    
    .image-slider__current {
        font-size: 30px;
    }
    
    .image-slider__current span {
        font-size: 24px;
        margin-left: 10px;
    }
    
    .image-slider__current span.total_slide {
        font-size: 20px;
    }
    
    .banner_text h2 {
        font-size: 40px;
        line-height: 1.5;
        margin-bottom: 40px;
    }

    .banner_text p {
        font-size: 20px;
    }

    .intro_left h2 {
        font-size: 30px;
        line-height: 1.5;
    }

    .intro_wrap {
        margin-top: 40px;
    }

    .intro_left p {
        font-size: 20px;
    }

    .intro_bottom {
        background-size: cover;
        border-radius: 10px;
        margin-top: 40px;
    }

    .research_list {
        grid-template-columns: minmax(0, 1fr);
    }
    
    .research_item {
        width: 100%;
        min-height: 400px;
    }

    .info_item {
        width: 100%;
    }
    
    .infomation_wrap {
        flex-wrap: wrap;
        margin-top: 40px;
    }
    
    .info_title h2 {
        font-size: 22px;
    }
    
    .info_item li {
        padding: 0;
    }
    
    .info_item p.info_name {
        font-size: 16px;
    }
    
    .professor_section {
        padding: 100px 0;
        background-size: cover;
    }
    
    .professor_top {
        flex-direction: column;
        padding: 30px;
    }
    
    .professor_top p {
        font-size: 16px;
    }
    
    .professor_top p br {
        display: none;
    }

    .professor_top div + div {
        flex-wrap: wrap;
        gap: 15px;
        margin-top: 15px;
    }
    
    .professor_section .professor_bottom .professor_item {
        width: 100%;
    }
    
    .professor_bottom {
        flex-wrap: wrap;
    }
    
    .professor_section p {
        font-size: 16px;
    }
    
    .professor_content h2 {
        font-size: 22px;
        margin-bottom: 10px;
    }

    .banner_main img {
        max-height: 600px;
    }
}

@media(max-width: 767px) {
    .research_item {
        background-size: 100% !important;
        background-position: center !important;
    }
}

/* Default visibility */
.is_pc {
    display: block;
}
.is_mobile {
    display: none;
}

/* Logic for mobile view */
@media (max-width: 425px) {
    .is_pc {
        display: none;
    }
    .is_mobile {
        display: block;
    }
}