.col-page-about .col-3 {
    position: relative;
       padding: 120px 0 400px;
    overflow: hidden;
}

.col-page-about .col-3 .about-history-bg-image {
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: auto;
    height: auto;
    z-index: 0;
}

.col-page-about .col-3 .about-history-bg-image img {
    display: block;
    width: auto;
    height: auto;
    max-width: none;
}


.col-page-about .col-3 .about-history-inner {
    position: relative;
    flex-direction: column;
    align-items: flex-start;
}

.col-page-about .col-3 .about-history-header {
    display: flex;
    justify-content: flex-start;
    gap: 24px;
    flex-direction: column;
}

.col-page-about .col-3 .about-history-title {
    font-size: var(--f48);
    font-weight: 700;
    line-height: 1.5;
}

.col-page-about .col-3 .about-history-nav-box {
    margin-top: 90px;
}

.col-page-about .col-3 .about-history-nav-swiper {
    overflow: visible;
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 420px;
    padding-left: 25px;
    position: relative;
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide::before {
    content: '';
    position: absolute;
    left: 0;
    top: 260px;
    width: 1px;
    height: calc(100% + 100px);
    background: linear-gradient(180deg, rgba(102, 106, 110, 0.36) 0%, rgba(0, 91, 172, 0) 100%);
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide-active::before {
    top: 0;
    height: calc(100% + 200px);
    background: linear-gradient(180deg, var(--gm-theme) 0%, rgba(0, 91, 172, 0) 100%);
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide>*+* {
    margin-top: 20px;
}

.col-page-about .col-3 .about-history-year {
    font-size: 40px;
    font-family: 'DIN';
    color: #888;
    font-weight: 700;
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide-active .about-history-year {
    color: var(--gm-theme);
}

.col-page-about .col-3 .about-history-copy {
    margin-top: 0;
    max-width: 820px;
    display: flex;
    flex-direction: column;
}

.col-page-about .col-3 .about-history-text {
    font-size: var(--f15);
    line-height: 1.8;
    color: #888;
    max-width: 420px;
}

.col-page-about .col-3 .about-history-image {
    margin-top: 30px;
    max-width: 450px;
    display: none;
}

.col-page-about .col-3 .about-history-image img {
    display: block;
    width: 100%;
    height: auto;
}

.col-page-about .col-3 .about-history-nav-swiper .swiper-slide-active .about-history-image {
    display: block;
}

@media (min-width: 768px) {
 

    .col-page-about .col-3 .about-history-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

}

@media (min-width: 1200px) {
    .col-page-about .col-3 .about-history-year {
        font-size: var(--f60);
    }
}