/* sub_active nth-child(1) 수정*/
/* .sub_head2 > ul > li:nth-child(1) > a::after {
    content: '';
    display: block;
    background-color: #fff;
    width: 100%;
    height: 3px;
    position: absolute;
    bottom: 0px;
    left: 0px;
} */
.sub_head2 > ul > li:nth-child(3) > a {
    color: #fff;
    font-weight: 500;
}

/* sub21_title */
.sub21_title {
    padding-top: 85px;
    text-align: center;
    padding-bottom: 121px;
}
.sub21_title > div > h3 {
    font-size: 36px;
    font-weight: 500;
    color: #03235d;
    margin-bottom: 16.5px;
}
.sub21_title > div > img {
    margin-bottom: 25px;
}
.sub21_title > div > p {
    font-size: 18px;
    font-weight: 400;
    color: #7a7a7a;
}

/* sub21_system */
.sub21_system {
    background-image: url(../img/sub_img/sub23_system_bg.png);
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    padding-top: 40px;
    padding-bottom: 122px;
    text-align: center;
    color: #fff;
}
.sub21_system > span {
    font-weight: 200;
    font-size: 24px;
}
.sub21_system > h3 {
    color: #00fff3;
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 80px;
}
.sub21_system > div {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
}
.sub21_system > div > div > p {
    font-size: 20px;
    font-weight: 400;
    margin-top: 30px;
}
.sub21_system > div > div > p > span {
    color: #00fff3;
}

/* sub21_swiper_wrap */
.sub21_swiper_wrap {
    padding-top: 120px;
}
.sub21_swiper_wrap > span {
    color: #727272;
    font-size: 22px;
    font-weight: 400;
    text-align: center;
    display: block;
}
.sub21_swiper_wrap > h3 {
    color: #242424;
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 50px;
    text-align: center;
}
.sub21_swiper_wrap > h3 > span {
    color: #00a2e9;
}
.sub21_swiper {
    overflow: hidden;
    position: relative;
}
.sub21_swiper .swiper-slide {
    border: 1px solid #dcdfe3;
}
.sub21_swiper .swiper-slide > div {
    padding-left: 20px;
    padding-bottom: 37px;
    padding-top: 11px;
    height: 231px;
}
.sub21_swiper .swiper-slide > div > p {
    color: #727272;
    font-size: 18px;
    font-weight: 400;
}
.sub21_swiper .swiper-slide > div > h4 {
    color: #222222;
    font-size: 26px;
    font-weight: 400;
    margin-bottom: 13px;
}
.sub21_swiper .swiper-slide > div > span {
    color: #233961;
    font-size: 20px;
    font-weight: 400;
}
.sub21_swiper_navigation {
    display: flex;
    justify-content: space-between;
}
.sub21_swiper_next {
    background-image: url(../img/sub_img/sub23_next.png);
    right: 0px;
}
.sub21_swiper_prev {
    background-image: url(../img/sub_img/sub23_prev.png);
    left: 0px;
}
.sub21_swiper_next,
.sub21_swiper_prev {
    width: 80px;
    height: 80px;
    background-color: #303030;
    background-position: center center;
    background-repeat: no-repeat;
    position: absolute;
    top: 50%;
    transform: translateY(-91%);
    z-index: 2;
}

/* sub21_tab_wrap */
.sub21_tab_wrap {
    padding-top: 112px;
    padding-bottom: 296px;
}
.sub21_tab_wrap > span {
    font-size: 22px;
    font-weight: 400;
    color: #727272;
    text-align: center;
    display: block;
}
.sub21_tab_wrap > h3 {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 59px;
    text-align: center;
}
.sub21_tab_wrap > h3 > span {
    color: #00a2e9;
}
.sub21_tab_in {
    display: flex;
    position: relative;
}
.sub21_tab_category {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.sub21_tab_category > a {
    font-size: 24px;
    font-weight: 400;
    color: #303030;
    padding: 24px 0px;
    width: 438px;
    text-align: center;
    position: relative;
    transition: all 0.2s;
}
.sub21_tab_category > a.active:after {
    content: '';
    display: block;
    position: absolute;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-right: none;
    border-left: 15px solid #233961;
    opacity: 1;
    z-index: 2;
    transition: all 0.2s;
}
.sub21_tab_category > a.active {
    color: #fff;
    background-color: #233961;
}
.sub21_tab_category > a:hover {
    color: #fff;
    background-color: #233961;
}
.sub21_tab_category > a:hover::after {
    opacity: 1;
}
.sub21_tab_category > a::before {
    content: '';
    display: block;
    position: absolute;
    width: 300px;
    height: 1px;
    background-color: rgba(195, 195, 195, 0.8);
    bottom: 0px;
    left: 50%;
    transform: translateX(-50%);
}
.sub21_tab_category > a::after {
    content: '';
    display: block;
    position: absolute;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-right: none;
    border-left: 15px solid #233961;
    opacity: 0;
    z-index: 2;
    transition: all 0.2s;
}
.sub21_tab_con2,
.sub21_tab_con3,
.sub21_tab_con4 {
    display: none;
}
.sub21_tab_con_warp > div {
    position: relative;
}
.sub21_tab_con_warp > div > div {
    position: absolute;
    left: 60px;
    bottom: 80px;
}
.sub21_tab_con_warp > div > div > h3 {
    font-size: 42px;
    font-weight: 500;
    color: #fff;
    margin-bottom: 29px;
}
.sub21_tab_con_warp > div > div > p {
    font-size: 20px;
    font-weight: 200;
    color: #eeeeee;
}
.sub21_tab_con1 > video {
    height: 601px;
}
.sub21_tab_con1 {
    width: 1000px;
    overflow: hidden;
}
.sub21_bgtext {
    position: absolute;
    bottom: -190px;
    left: 0px;
    color: #39517d;
    opacity: 0.1;
}
.sub21_bgtext > p {
    font-size: 72px;
    font-weight: 400;
}
.sub21_bgtext > span {
    font-size: 144px;
    font-weight: 400;
    letter-spacing: 18px;
}

/* sub21_clean */
.sub21_clean {
    padding: 50px;
    background-image: url(../img/sub_img/sub21_clean_bg.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    color: #fff;
}
.sub21_clean_line {
    border: 1px solid #ffffff;
    padding: 101px 0px;
    position: relative;
}
.sub21_clean_in > span {
    font-size: 18px;
    font-weight: 200;
}
.sub21_clean_in > h3 {
    font-size: 48px;
    font-weight: 200;
    margin-bottom: 40px;
}
.sub21_clean_in > h3 > span {
    font-weight: 600;
    color: #ccfefd;
}
.sub21_clean_in > p {
    font-size: 20px;
    font-weight: 200;
}
.sub21_clean_line > div > img {
    position: absolute;
    right: 258px;
    top: 20px;
}
/*tablet main*/
@media screen and (max-width: 1024px) {
    .pc_con {
        display: none;
    }
    .m_con {
        display: block;
    }
    .center {
        width: 760px;
    }
    .sub21_title > div > p {
        font-size: 16px;
    }
    .sub21_swiper_next,
    .sub21_swiper_prev {
        width: 40px;
        height: 80px;
        top: 48px;
    }
    .sub21_swiper .swiper-slide > div > h4 {
        font-size: 14px;
    }
    .sub21_swiper .swiper-slide > div {
        padding-left: 10px;
    }
    .sub21_swiper .swiper-slide > div > p {
        font-size: 12px;
    }
    .sub21_tab_category > a {
        font-size: 16px;
        width: 200px;
    }
    .sub21_bgtext {
        z-index: -1;
        bottom: -235px;
    }
    .sub21_tab_con_warp > div > div > h3 {
        font-size: 32px;
    }
    .sub21_tab_con_warp > div > div > p {
        font-size: 16px;
    }
    .sub21_bgtext > span {
        font-size: 100px;
        letter-spacing: 4px;
    }
    .sub21_bgtext > p {
        font-size: 50px;
    }
    .sub21_clean {
        padding: 50px 25px;
    }
    .sub21_clean_in > h3 {
        font-size: 36px;
    }
    .sub21_clean_in > p {
        font-size: 17px;
    }
    .sub21_clean_line > div > img {
        right: -29px;
        top: -190px;
    }
    .sub21_clean_line {
        padding: 101px 16px;
    }
}

/*mobile main*/
@media screen and (max-width: 767px) {
    .center {
        width: 380px;
    }
    .sub21_title > div > h3 {
        font-size: 26px;
    }
    .sub21_title > div > p {
        font-size: 15px;
    }
    .sub21_system > h3 {
        margin-bottom: 30px;
        font-size: 24px;
    }
    .sub21_system > div > div > p {
        font-size: 12px;
    }
    .sub21_system {
        padding-bottom: 70px;
    }
    .sub21_system > span {
        font-size: 22px;
    }
    .sub21_tab_category {
        flex-wrap: wrap;
        flex-direction: row;
    }
    .sub21_tab_in {
        flex-direction: column;
    }
    .sub21_tab_category > a {
        font-size: 13px;
        width: 100%;
    }
    .sub21_tab_category > a.active:after {
        display: none;
    }
    .sub21_tab_con_warp > div > div {
        left: 13px;
        bottom: 38px;
    }
    .sub21_tab_con_warp > div > div > h3 {
        font-size: 24px;
    }
    .sub21_tab_con_warp > div > div > p {
        font-size: 12px;
    }
    .sub21_tab_con1 {
        width: initial;
    }
    .sub21_tab_con1 > video {
        height: initial;
        width: 100%;
    }

    .sub21_bgtext {
        bottom: -90px;
    }
    .sub21_clean_line {
        padding: 390px 16px;
    }
    .sub21_clean_line > div > img {
        top: -220px;
    }
    .sub21_clean_line {
        padding: 240px 16px 100px;
    }
    .sub21_clean_in > span {
        font-size: 15px;
    }
    .sub21_clean_in > h3 {
        font-size: 28px;
    }
    .sub21_clean_in > p {
        font-size: 12px;
    }
    .sub21_swiper_wrap {
        padding-top: 60px;
    }
    .sub21_tab_wrap {
        padding-top: 60px;
    }
    .sub21_swiper .swiper-slide > div {
        height: 161px;
    }
}