.title .p1 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 700;
    font-size: calc(4px + 3rem);
    color: #333333;
    line-height: calc(13px + 4rem);
}

.title .p2 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 400;
    font-size: calc(8px + 0.5rem);
    color: #999999;
    line-height: calc(6px + 1rem);
    margin-top: calc(9px + 1rem);
}

.banner {
    width: 100%;
}

.banner img {
    width: 100%;

}

.about_nav_box {
    max-width: 1740px;
    width: 90%;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: calc(14px + 4rem);
}

.about_nav_box .p1 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 700;
    font-size: calc(6px + 1.5rem);
    color: #333333;
    line-height: calc(12px + 2rem);
}

.about_nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: calc(73px + 5rem);
}

.about_nav_item {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 500;
    font-size: calc(10px + 0.5rem);
    color: #666666;
    line-height: calc(9px + 1rem);

}

.about_nav_item a {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: calc(9px + 0.5em);
}

.about_nav_item div {
    width: calc(20px + 2rem);
    height: calc(1px + 0.1rem);
    background: #ffffff;
}

.about_nav_item_act {
    color: #007BA3;
}

.about_nav_item_act div {

    background: #007BA3;
}

.about_main_box {
    width: 100%;
    padding: calc(8px + 3rem) 0;
}

.about_main {
    max-width: 1740px;
    width: 90%;
    margin: auto;
}

.about_main .p1 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 700;
    font-size: calc(8px + 2rem);
    color: #333333;
    line-height: calc(10px + 3rem);
}

.about_content {
    display: flex;
    justify-content: space-between;
    gap: calc(12px + 2rem);
    margin-top: calc(13px + 2rem);
}

.about_content_left {
    width: 48.8506%;
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 400;
    font-size: calc(4px + 0.5rem);
    color: #666666;
    line-height: calc(10px + 1.5rem);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: calc(1px + 1rem);
}

.about_content_video {
    flex: 1;
    height: calc(86px + 20rem);
}

.about_content_video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media screen and (max-width: 1100px) {
    .banner {
        margin-top: 0 !important;
    }

    .title .p1 {
        font-size: calc(16px + 1rem) !important;
        line-height: 1.5 !important;
    }
    .title .p2{
        font-size: calc(10px + 1rem) !important;
        line-height: 1.5 !important;
    }

    .about_nav_box {
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: calc(10px + 2rem);
    }

    .about_nav_box .p1 {
        font-size: calc(14px + 1rem);
    }

    .about_nav {

        gap: calc(15px + 1rem);
    }

    .about_nav_item {
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }

    .about_main .p1 {
        font-size: calc(16px + 1rem);
        line-height: 1.5;
    }

    .about_content {
        flex-direction: column;
        justify-content: flex-start;
        gap: calc(10px + 1rem);
        margin-top: calc(5px + 2rem);
    }

    .about_content_left {
        width: 100%;
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }
}