.main_course_container{
    position:relative;
}
.main_course_container.package_info_box{
    display:none;
    margin-top: 130px;
    background-color: var(--nj-school-primary);
    height:400px;
    overflow:hidden;
}
.main_course_container.promotion_box{
    top:-120px;
    padding-top: 185px;
    padding-bottom: 110px;
    background-color: #FFE812;
}
.main_course_container.promotion_box .inner_main_contents{
    display:flex;
    align-items: center;
    justify-content: space-around;
}

.main_course_container.promotion_box .inner_main_contents .promotion_text_1{
    width: 100%;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_1.pc{
    width: 20.3125vw;
    min-width:290px;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_1.mobile{
    display:none;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_2_box{
    position:relative;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_2{
    width:100%;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_2.pc{
    width: 39.3229vw;
    min-width: 560px;
}
.main_course_container.promotion_box .inner_main_contents .promotion_text_2.mobile{
    display:none;
}
.main_course_container.promotion_box .promotion_clickable_area{
    position: absolute;
    right: 16%;
    bottom: 11.3%;
    width: 70%;
    height: 13%;
}
.main_course_container.kakao_box{
    margin-top: var(--nj-space-3xl);
    background-color: #FFC83C;
    overflow:hidden;
}
.main_course_container.kakao_box .inner_main_contents{
    position:relative;
    padding-top: 48px;
    padding-bottom: 47px;
}
.kakao_box .kakao_clock_img{
    position: absolute;
    top: -65px;
    right: 0;
    width: 433px;
    pointer-events: none;
}
.kakao_box .kakao_channel_btn{
    display:inline-block;
    margin-top: 30px;
    padding: 14px 30px;
    background-color: var(--nj-dark);
    color: #fff;
    text-align: center;
    font-family: var(--nj-font-heading);
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    border-radius: 5px;
}
.kakao_box .kakao_channel_text{
    color: #FFF;
    font-family: var(--nj-font-heading);
    font-size: 36px;
    font-style: normal;
    font-weight: 700;
    line-height: 40px;
}
.kakao_box .kakao_channel_text.mobile{
    display:none;
}
.kakao_box .kakao_channel_text span{
    color:var(--nj-accent-red);
}
.main_course_container.intro_video{
    padding-top: 100px;
    padding-bottom: 140px;
    background-color: var(--nj-dark);
}
.main_course_container.light_gray{
    text-align: center;
    background-color: #F5F5F5;
}
.main_countdown_box{
    display:flex;
    /*display:none;*/
    position:relative;
    margin: -50px auto 0 auto;
    width: 1000px;
    height: 170px;
    border-radius: 15px;
    background: linear-gradient(135deg, #FFC83C 0%, var(--nj-school-primary) 100%);
    box-shadow: 0px 15px 30px 0px rgba(0, 0, 0, 0.10);
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}
.main_countdown_box .title_box{
    margin-left: 15px;
    width: 327px;
    display: flex;
    flex-direction: column;
}
.main_countdown_box .title_box .buy_now_box{
    margin-top: 5px;
    text-align: right;
    font-size: 17px;
    font-family: var(--nj-font-heading);
    font-weight: 500;
}
.main_countdown_box .title_box .coming_soon{
    color: var(--nj-accent-red);
    padding-right:3px; /* letter-spacing 상쇄시키기 */
    text-align:right;
    font-size: 40px;
    white-space: nowrap;
    letter-spacing: -3px;
    font-weight: bold;
}
.main_countdown_box .title_box .buy_now_box a {
    display:inline-block;
    color: var(--nj-accent-red);
    font-size: 20px;
}
.main_countdown_box .title_box .buy_now_box img.mobile{
    display: none;
}
.main_countdown_box .title_box .title{
    margin-top: 8px;
    color: #fff;
    text-align: right;
    font-size: 40px;
    font-family: var(--nj-font-heading);
    font-weight: 700;
    line-height: 40px;
}
.main_countdown_box .countdown_time_box{
    display:flex;
    width:610px;
}
.main_countdown_box .countdown_time_box .countdown_number{
    display:flex;
    gap: 11px;
}
.main_countdown_box .countdown_time_box .countdown_number .countdown_value,
.main_countdown_box .countdown_time_box .countdown_number .value_divider{
    color: #fff;
    text-align: center;
    text-shadow: rgba(0, 0, 0, 0.20) 0px 10px 10px;
    font-size: 80px;
    font-family: var(--nj-font-heading);
    font-weight: 700;
}
.main_countdown_box .countdown_time_box .countdown_number .time_box{
    text-align: center;
    display: flex;
    flex-direction: column;
}
.main_countdown_box .countdown_time_box .countdown_number .countdown_label{
    margin-top: -5px;
    color: #FFF;
    text-align: center;
    font-size: 14px;
    font-family: var(--nj-font-heading);
}

.course_teacher_title{
    margin: 0 0 var(--nj-space-lg);
    padding-top: var(--nj-space-2xl);
    color: var(--nj-dark);
    font-size: 20px;
    font-family: var(--nj-font-heading);
    font-weight: 700;
}

.bottom_text {
    display: inline-block;
    margin-top: 10px;
}

.login_page_btn,
.signup_page_btn,
.view_lecture_btn,
.buy_package_btn {
    width: 200px;
}
.buy_package_btn{
    font-size:18px;
    font-weight:bold;
    color:#ff0000;
}

.description_box {
    text-align: center;
    font-size: 0;
    margin-bottom: 137px;
}

.description {
    display: inline-block;
    width: 255px;
    height: 211px;
    box-shadow: 0px 3px 20px var(--nj-border-form);
}

.description:nth-child(2) {
    margin-left: 19px;
}

.description_title {
    font-size: 14px;
    margin-bottom: 10px;
}

.description_title.expert::before {
    content: '';
    display: inline-block;
    width: 100%;
    height: 32px;
    margin: 56px auto 8px;
    background-image: url(../images/img_introduction_01.png);
    background-repeat: no-repeat;
    background-position-x: center;
}

.description_title.package::before {
    content: '';
    display: inline-block;
    width: 100%;
    height: 31px;
    margin: 57px auto 9.5px;
    background-image: url(../images/img_introduction_02.png);
    background-repeat: no-repeat;
    background-position-x: center;
}

.description_value {
    font-size: 12px;
}

.main_contents.gray {
    background-color: #F9F9F9;
    min-height: 100px;
    margin-bottom: 3px;
}

.gray .inner_main_contents {
    max-width: 1264px;
    padding: 125px 30px 124px;
}

.main_bottom_title {
    text-align: center;
    padding-bottom: 15px;
}

.main_bottom_description {
    font-size: 20px;
    color: #747474;
    text-align: center;
    padding-bottom: 67px;
}

.video_list_box{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--nj-space-lg);
}

.video_box {
    border-radius: var(--nj-radius-lg);
    font-family: var(--nj-font-heading);
    box-shadow: var(--nj-shadow-sm);
    transition: transform var(--nj-transition-normal), box-shadow var(--nj-transition-normal);
    overflow: hidden;
}
.video_box:hover {
    transform: translateY(-4px);
    box-shadow: var(--nj-shadow-lg);
}

.video_box a {
    display: block;
}

.video_img {
    display: block;
    width: 100%;
    background-color: #eee;/* 임시 속성 */
    border-radius: var(--nj-radius-lg) var(--nj-radius-lg) 0 0;
}
.video_info_box{
    padding: var(--nj-space-md);
}
.video_info_box .line{
    margin: var(--nj-space-md) 0;
    height: 1px;
    background-color: var(--nj-border-form);
}

.video_info_box .nickname {
    color: var(--nj-text-tertiary);
    font-size: 13px;
    font-weight: 400;
}

.video_info_box .video_title {
    margin-top: var(--nj-space-xs);
    color: var(--nj-dark);
    font-size: 16px;
    font-weight: 700;
    line-height: 1.4;
    word-break: keep-all;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.video_info_box .trader_introduction{
    font-size: 13px;
    letter-spacing: -0.3px;
}

.video_info_box .teacher_info_btn{
    display:flex;
    margin-top: var(--nj-space-sm);
    color: var(--nj-school-primary);
    font-size: 14px;
    font-weight: 700;
    line-height: 25px;
    gap: 6px;
    align-items: flex-end;
}

.buy_package_now_box{
    display:flex;
    justify-content: space-between;
    font-family: var(--nj-font-heading);
}
.buy_package_now_box .purchase_left_day{
    font-size: 25px;
    font-weight: 700;
    color:var(--nj-school-primary);
}
.buy_package_now_box .purchase_period{
    font-size: 17px;
    color:var(--nj-school-primary);
}
.buy_package_now_box .buy_now_btn{
    display:inline-block;
    margin-left: 20px;
    width: 160px;
    height: 45px;
    line-height: 45px;
    font-size: 17px;
    color:#fff;
    text-align:center;
    border-radius: 5px;
    background: var(--nj-accent-red);
}
.buy_package_now_box .intro_text{
    color: var(--nj-dark);
    font-size: 17px;
}
.buy_package_now_box .intro_text.emphasize{
    color:var(--nj-accent-red);
}

.package_info_ticket{
    position:absolute;
    top:50px;
    left: calc(50% - 600px);
    width:1293px;
    height:348px;
    background: url("../images/2023_renew/main_package_info_box.png");
    font-family: var(--nj-font-heading);
}
.package_info_ticket_inner{
    display:flex;
    width:1200px;
    height:300px;
}
.package_info_ticket_inner.mobile{
    display:none;
}
.package_info_ticket .package_info_box{
    flex: 1 1 0;
    padding: 30px 45px;
    width: 0;
}
.package_info_ticket .package_title{
    margin-bottom: 35px;
    color: var(--nj-dark);
    font-size: 36px;
    font-weight: 700;
}
.package_info_ticket .package_info_title{
    margin-top: 20px;
    color: var(--nj-school-primary);
    font-size: 17px;
    line-height: 25px;
}
.package_info_ticket .package_info_detail{
    font-size: 17px;
    line-height: 25px;
}

.package_info_ticket .package_buy_box{
    flex: 1 1 0;
    padding: 50px 45px 0 45px;
    width: 0;
    text-align: center;
}
.package_buy_box .monthly_label{
    color: var(--nj-school-primary);
    font-size: 17px;
}
.package_buy_box .total_price{
    display:inline-block;
    margin-top: 25px;
    line-height: 55px;
    color: var(--nj-dark);
    font-size: 65px;
    font-weight: 700;
    border-bottom: solid 5px var(--nj-accent-red);
}
.package_buy_box .intro_text{
    margin-top: 35px;
    color: var(--nj-dark);
    font-size: 17px;
}
.package_buy_box .buy_now_btn{
    display:inline-block;
    margin-top: 15px;
    width: 500px;
    height: 45px;
    line-height: 45px;
    font-size: 17px;
    color:#fff;
    font-weight:700;
    border-radius: 5px;
    background: var(--nj-accent-red);
}

.intro_title{
    margin-top: var(--nj-space-3xl);
    color:var(--nj-dark);
    text-align: center;
    font-size: 56px;
    font-weight: 700;
    line-height: 65px;
    font-family: var(--nj-font-heading);
}
.intro_icon_list{
    margin-top: var(--nj-space-2xl);
    margin-bottom: 160px;
    display:flex;
    justify-content: space-between;
}
.intro_icon_pc{
    display:block;
}
.intro_icon_mobile{
    display:none;
}

.view_count {
    color: #CECECE;
}

.view_count::before {
    content: '';
    display: inline-block;
    vertical-align: middle;
    width: 14px;
    height: 14px;
    margin-top: -2px;
    margin-right: 5px;
    background-image: url(../images/ic_student_number.png);
}

.course_video_title{
    color: #fff;
    font-size: 36px;
    font-weight: 700;
}
.intro_video_box{
    display:flex;
    margin-top: 50px;
    width:100%;
    text-align: center;
    font-size: 60px;
    color:#fff;
    justify-content: center;
    align-items: center;
}

.main_link_container{
    padding: var(--nj-space-2xl) 0 var(--nj-space-3xl);
    display:flex;
    justify-content: space-between;
    gap: var(--nj-space-lg);
}
.main_link_container.mobile{
    display:none;
}
.main_link_box{
    flex: 1 1 0;
    width:0;
    background: #fff;
    border: 1px solid var(--nj-border-light);
    border-radius: var(--nj-radius-lg);
    padding: 32px 28px;
    box-shadow: var(--nj-shadow-sm);
    transition: transform var(--nj-transition-normal),
                box-shadow var(--nj-transition-normal),
                border-color var(--nj-transition-normal);
    display: flex;
    flex-direction: column;
}
.main_link_box:hover{
    transform: translateY(-2px);
    box-shadow: var(--nj-shadow-md);
    border-color: var(--nj-primary);
}
.main_link_container .vertical_divider{
    display: none;
}

/* icon — primary soft tint 정사각 wrapper (HTML 변경 없이 img 자체에 padding+bg) */
.main_link_box > img:first-child{
    display: block;
    width: 28px;
    height: 28px;
    padding: 10px;
    background: var(--nj-primary-soft);
    border-radius: var(--nj-radius-md);
    box-sizing: content-box;
    object-fit: contain;
    margin: 0 0 20px;
}

.main_link_title{
    margin-top: 0;
    color: var(--nj-dark);
    font-size: 18px;
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: -0.3px;
}
.main_link_title .emphasize{
    color: var(--nj-primary);
}
.main_link_description{
    margin-top: 10px;
    color: var(--nj-text-secondary);
    font-size: 14px;
    line-height: 1.6;
    letter-spacing: -0.2px;
}
.main_link_more{
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
    padding-top: 20px;
    color: var(--nj-primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap var(--nj-transition-normal);
    align-self: flex-start;
}
.main_link_more:hover{
    gap: 10px;
}
.main_link_more img{
    width: 14px;
    height: 14px;
    transition: transform var(--nj-transition-normal);
}
.main_link_box:hover .main_link_more img{
    transform: translateX(3px);
}
.main_link_cs_center_info{
    margin-top: 14px;
    color: var(--nj-text-tertiary);
    font-size: 12px;
    letter-spacing: -0.2px;
    line-height: 1.5;
}

.punch_icon{
    padding-top: var(--nj-space-3xl);
}
.main_intro_punch_text{
    margin-top: var(--nj-space-xl);
    font-size: 36px;
    line-height: 40px;
}
.main_intro_punch_label{
    padding-top: var(--nj-space-lg);
    padding-bottom: var(--nj-space-3xl);
    color:var(--nj-dark);
    font-size: 17px;
}
.main_intro_punch_text.mobile{
    display:none;
}
.main_intro_punch_label.mobile{
    display:none;
}

/* 팝업 공지 */
.popup_notice_bg{
    position:fixed;
    top:0;
    left:0;
    width:100vw;
    height:100vh;
    background-color: var(--nj-bg-overlay);
    z-index:2000;
}
.popup_notice_modal{
    position:absolute;
    top:50%;
    left:50%;
    max-width: min(520px, 90vw);
    max-height:85vh;
    width:600px;
    height:500px;
    background-color: #fff;
    border-radius: var(--nj-radius-lg);
    transform: translate(-50%, -50%);
    box-shadow: var(--nj-shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.popup_notice_title{
    padding: 16px 20px;
    font-size: 16px;
    font-weight: 700;
    font-family: var(--nj-font-heading);
    white-space: nowrap;
    border-bottom: 1px solid var(--nj-border-light);
    flex-shrink: 0;
}
.popup_notice_content{
    padding: 20px;
    flex: 1;
    min-height: 0;
    font-size: 16px;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.popup_notice_content img{
    display: block;
    max-width: 100% !important;
    height: auto !important;
}
.popup_notice_content *{
    max-width: 100%;
}
.popup_notice_bottom{
    display: flex;
    gap: 8px;
    padding: 12px 20px;
    border-top: 1px solid var(--nj-border-light);
    flex-shrink: 0;
}
.popup_button{
    flex: 1;
    height: 40px;
    border-radius: var(--nj-radius-md);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--nj-font-heading);
    cursor: pointer;
    transition: all var(--nj-transition-normal);
    border: 1px solid var(--nj-border);
    background: var(--nj-bg-light);
    color: var(--nj-text-primary);
}
.popup_button:hover{
    background: var(--nj-border-light);
}
.popup_button:last-child{
    background: transparent;
    color: var(--nj-text-muted);
    border-color: var(--nj-border-light);
}
.popup_button:last-child:hover{
    background: var(--nj-bg-muted);
}
.main_bottom_buy_box{
    position:sticky;
    left:0;
    bottom:0;
    width:100%;
    height: 100px;
    background-color: #fff;
    border-top: solid 2px var(--nj-school-primary);
}
.main_bottom_buy_box_inner{
    display: flex;
    position:relative;
    margin: 0 auto;
    width: 100%;
    max-width: 1200px;
    height:100%;
    justify-content: flex-end;
    align-items: center;
    gap:30px;
}
.main_bottom_buy_box_inner .package_info{
    text-align: right;
}
.main_bottom_buy_box_inner .emphasize{
    color:var(--nj-accent-red);
}
.main_bottom_buy_box_inner .package_name{
    font-size: 17px;
}
.main_bottom_buy_box_inner .package_price{
    line-height: 33px;
    font-size: 30px;
    font-weight: bold;
}
.main_bottom_buy_box_inner .package_buy_btn{
    display:block;
    width: 380px;
    height: 60px;
    line-height: 60px;
    background-color: var(--nj-accent-red);
    color:#fff;
    font-size: 17px;
    font-weight: bold;
    text-align: center;
    border-radius: 5px;
}
.main_bottom_buy_box_inner .to_the_top{
    position:absolute;
    right:0;
    top: -65px;
    width: 60px;
    height: 60px;
}
.main_bottom_buy_box_inner .to_the_top img{
    width:100%;
}

@media screen and (max-width: 1280px) {
    .countdown_bar_inner{
        padding: 0 30px;
    }
    .header .inner_header{
        padding: 0 30px;
    }
    .main_countdown_box{
        margin:0;
        width:100%;
        border-radius: 0;
    }

    .video_list_box{
        grid-template-columns: repeat(2, 1fr);
    }
    .video_info_box{
        padding: 12px;
    }
    .video_info_box .trader_introduction{
        font-size: 14px;
    }

    .buy_package_now_box{
        display:none;
    }

    .course_teacher_title,
    .course_video_title{
        padding-left: 30px;
        padding-right: 30px;
    }

    .lecture_container{
        padding:0 30px;
    }

    .main_link_container.pc{
        display:none;
    }
    .main_link_container.mobile{
        display:flex;
        padding:40px 30px;
        flex-direction: column;
    }
    .main_link_box{
        display:flex;
        flex: auto;
        width: 100%;
        gap: 10px;
        align-items: center;
        justify-content: space-between;
    }
    .main_link_title{
        margin-top: 0;
        font-size: 20px;
    }
    .main_link_more{
        margin-top: 0;
        margin-left: auto;
        min-width:90px;
    }
    .main_link_container .vertical_divider{
        width:100%;
        height:1px;
        background-color: var(--nj-border-form);
    }
    .main_link_description{
        margin-top: 0;
        margin-left: auto;
    }
    .main_link_cs_center_info{
        margin-top: 10px;
        text-align: center;
    }


    .kakao_box .inner_main_contents{
        padding-left: 30px;
    }
    .kakao_box .kakao_clock_img{
        position:absolute;
        right:20px;
    }
    .kakao_box .kakao_channel_btn{
        display:inline-block;
        margin-top: 30px;
        padding: 14px 30px;
        background-color: var(--nj-dark);
        color: #fff;
        text-align: center;
        font-family: var(--nj-font-heading);
        font-size: 17px;
        font-style: normal;
        font-weight: 400;
        line-height: normal;
        border-radius: 5px;
    }
    .kakao_box .kakao_channel_text{
        color: #FFF;
        font-family: var(--nj-font-heading);
        font-size: 36px;
        font-style: normal;
        font-weight: 700;
        line-height: 40px;
    }
    .kakao_box .kakao_channel_text.pc{
        display:none;
    }
    .kakao_box .kakao_channel_text.mobile{
        display:block;
    }

    .main_bottom_buy_box_inner{
        padding:0 20px;
    }
}

@media screen and (max-width:1100px){
    .intro_icon_list{
        flex-direction: column;
        gap:20px;
        align-items: center;
    }
    .intro_icon_pc{
        display:none;
    }
    .intro_icon_mobile{
        display:block;
        width:65%;
        min-width:320px;
    }

    .main_countdown_box .title_box .coming_soon{
        font-size: 32px;
        text-align: right;
    }

    .kakao_box .inner_main_contents{
        padding: 30px 20px;
    }
    .kakao_box .kakao_clock_img{
        position:absolute;
        top: 1px;
        right:20px;
        width:258px;
    }
    .kakao_box .kakao_channel_btn{
        display:block;
        margin-top: 15px;
    }
    .kakao_box .kakao_channel_text {
        line-height: 45px;
    }
}

@media screen and (max-width:920px){
    .main_countdown_box{
        justify-content: space-around;
    }
    .main_countdown_box .title_box{
        width: auto;
    }
    .main_countdown_box .title_box .title{
        font-size: 30px;
    }
    .main_countdown_box .title_box .coming_soon{
        font-size: 20px;
        letter-spacing: -1px;
    }
    .main_countdown_box .title_box .buy_now_box a{
        font-size: 20px;
    }
    .main_countdown_box .countdown_time_box{
        width:auto;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_value,
    .main_countdown_box .countdown_time_box .countdown_number .value_divider{
        font-size: 60px;
    }
    .main_course_container.promotion_box .inner_main_contents{
        flex-direction: column;
        gap:46px;
    }
    .main_course_container.promotion_box .inner_main_contents .promotion_text_1.pc,
    .main_course_container.promotion_box .inner_main_contents .promotion_text_2.pc{
        display:none;
    }
    .main_course_container.promotion_box .inner_main_contents .promotion_text_1.mobile,
    .main_course_container.promotion_box .inner_main_contents .promotion_text_2.mobile{
        display:block;
    }
    .package_info_ticket{
        position:absolute;
        top: calc(50% - 125px);
        left:calc(50% - 215px);
        width: 430px;
        height: 250px;
        background: url("../images/2023_renew/main_package_info_box_mobile.png");
    }
    .package_info_ticket_inner.pc{
        display: none;
    }
    .package_info_ticket_inner.mobile{
        display:block;
    }
    .package_info_ticket_inner{
        width: 100%;
        height:auto;
    }
    .package_info_mobile_container{
        padding: 35px 0 0 30px;
    }
    .package_info_ticket .package_info_box{
        display:flex;
        padding:0;
        width:100%;
        gap: 20px;
        align-items: center;
    }
    .package_info_ticket .package_info_title{
        margin-top: 0;
        line-height: normal;
        font-size: 10px;
    }
    .package_info_ticket .package_info_detail{
        margin-bottom: 5px;
        line-height: normal;
        font-size: 12px;
        border-bottom: solid 1px var(--nj-text-disabled);
    }
    .package_info_price_box{
        display:flex;
        flex-direction: column;
    }
    .package_info_ticket .package_title{
        font-size: 16px;
        margin-bottom: 0;
    }
    .package_info_ticket .monthly_label{
        font-size: 12px;
        color:var(--nj-school-primary);
    }
    .package_info_ticket .total_price{
        display: block;
        margin-top: 0;
        width: 100%;
        font-size: 30px;
        font-weight: bold;
        letter-spacing: -1px;
        border-bottom: solid 3px var(--nj-accent-red);
    }
    .buy_now_btn{
        display:block;
        margin-top: 12px;
        width: 370px;
        height: 35px;
        line-height: 35px;
        font-size: 14px;
        color:#fff;
        text-align:center;
        border-radius: 5px;
        background: var(--nj-accent-red);
    }
    .intro_text{
        margin-top: 3px;
        color: var(--nj-dark);
        text-align: center;
        font-size: 10px;
        font-style: normal;
        font-weight: 400;
        line-height: normal;
    }
    .intro_text .emphasize{
        color: var(--nj-accent-red);
    }

    .main_bottom_buy_box{
        display:none;
    }
    .mobile_pay_panel{
        display:block;
    }
}

@media screen and (max-width: 768px) {
    .countdown_bar_inner{
        padding: 0 15px;
    }
    .top_place .countdown_bar_inner{
        padding-left: 15px;
    }
    .header .inner_header{
        padding: 0 15px;
    }
    .main_countdown_box{
        height:150px
    }
    .main_countdown_box .title_box{
        margin-left: 0;
        width: auto;
    }
    .main_countdown_box .title_box .title{
        font-size: 24px;
    }
    .main_countdown_box .countdown_time_box{
        width:auto;
    }
    .main_countdown_box .countdown_time_box .countdown_number{
        gap:7px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_value,
    .main_countdown_box .countdown_time_box .countdown_number .value_divider{
        font-size: 40px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_label{
        font-size: 12px;
    }
    .main_contents.gray {
        margin-bottom: 0;
    }

    .description_box {
        margin: 0;
    }

    .course_teacher_title{
        margin: 0 0 var(--nj-space-md);
        padding: var(--nj-space-lg) 0 0;
    }
    .lecture_container{
        margin-top: 30px;
        padding:0;
    }
    .video_list_box{
        grid-template-columns: 1fr;
    }

    .main_course_container.package_info_box{
        margin-top: 30px;
    }

    .description_box .description {
        display: block;
        margin: 30px auto;
    }

    .description_value {
        font-size: 13px;
    }

    .gray .inner_main_contents {
        padding: 30px 20px;
    }

    .main_bottom_title {
        font-size: 20px;
        padding-bottom: 20px;
    }

    .main_bottom_description {
        font-size: 16px;
        padding: 0;
    }

    .punch_icon{
        padding-top: 50px;
    }
    .punch_icon img{
        max-width:230px;
    }
    .main_intro_punch_text.pc{
        display:none;
    }
    .main_intro_punch_text.mobile{
        display:block;
        font-size: 25px;
    }
    .main_intro_punch_label.pc{
        display:none;
    }
    .main_intro_punch_label.mobile{
        display:block;
        font-size: 14px;
    }

    .btn.login_page_btn,
    .btn.signup_page_btn,
    .btn.buy_package_btn{
        display: block;
        margin: auto;
    }

    .btn.signup_page_btn,
    .btn.buy_package_btn{
        margin-top: 10px
    }

    .kakao_box .kakao_clock_img{
        left:440px;
    }
}

@media screen and (max-width: 620px) {
    .main_course_container.kakao_box .inner_main_contents{
        padding: 30px 20px;
    }
    .kakao_box .kakao_channel_btn {
        padding: 10px 0;
        font-size: 14px;
    }

    .kakao_box .kakao_channel_text {
        line-height: 35px;
        font-size: 25px;
    }

    .kakao_box .kakao_clock_img {
        position: absolute;
        top: 1px;
        left: 330px;
        width: 158px;
    }
}

@media screen and (max-width: 600px){
    .main_course_container.promotion_box{
        top: -90px;
        padding-top: 140px;
    }
    .main_countdown_box .title_box .buy_now_box img.pc{
        display: none;
    }
    .main_countdown_box .title_box .buy_now_box img.mobile{
        display:inline-block;
    }
    .main_countdown_box .title_box .title{
        line-height: 26px;
        font-size: 22px;
    }
    .main_countdown_box .title_box .coming_soon{
        font-size: 16px;
    }
    .main_countdown_box{
        height:90px
    }
    .main_countdown_box .title_box .buy_now_box{
        font-size: 10px;
    }
    .main_countdown_box .title_box .buy_now_box a{
        font-size: 14px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_value,
    .main_countdown_box .countdown_time_box .countdown_number .value_divider{
        font-size: 35px;
    }

    .video_info_box .trader_introduction{
        font-size:12px;
    }

    .intro_title{
        margin-top: 10px;
        text-align: center;
        font-size: 25px;
        line-height: 35px;
    }
    .intro_icon_list{
        margin-top: 30px;
        margin-bottom: 10px;
    }

    .main_course_container.intro_video{
        padding-top: 30px;
        padding-bottom: 30px;
    }

    .main_link_container.mobile{
        padding:0;
        gap:23px;
    }
    .main_link_description{
        font-size: 14px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_label{
        font-size: 12px;
    }
}

@media screen and (max-width: 480px){
    .main_countdown_box .title_box .title{
        font-size: 20px;
    }
    .main_countdown_box .title_box .coming_soon{
        font-size: 12px;
    }
    .main_countdown_box .title_box .buy_now_box a{
        font-size: 12px;
        letter-spacing: -0.5px;
    }
    .video_info_box{
        padding: 10px 15px 12px 12px;
    }

    .kakao_box .kakao_channel_text {
        line-height: 25px;
        font-size: 18px;
    }
    .kakao_box .kakao_clock_img {
        top: 1px;
        left: 250px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_label{
        font-size: 10px;
    }
}
@media screen and (max-width: 425px){
    .inner_main_contents.course_intro{
        padding: 15px 8px;
    }
    .countdown_bar_inner{
        padding: 0 10px;
        font-size: 12px;
    }
    .top_place .countdown_bar_inner{
        padding-left: 10px;
        padding-right: 0;
    }
    .countdown_box{
        flex-direction: column;
        align-items: center;
    }
    .course_title_name{
        margin:0;
    }
    .main_countdown_box .title_box .title{
        font-size: 18px;
        line-height: 18px;
    }
    .main_countdown_box .countdown_time_box .countdown_number{
        gap:5px;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_value,
    .main_countdown_box .countdown_time_box .countdown_number .value_divider{
        font-size: 24px;
    }
    .intro_icon_mobile{
        min-width:300px;
    }
}
@media screen and (max-width: 375px){
    .main_countdown_box .countdown_time_box .countdown_number .countdown_label{
        display:none;
    }
    .main_countdown_box .countdown_time_box .countdown_number .countdown_value,
    .main_countdown_box .countdown_time_box .countdown_number .value_divider{
        font-size: 18px;
    }

    .course_teacher_title,
    .course_video_title{
        font-size: 24px;
    }
    .video_info_box{
        padding: 10px 8px 12px 8px;
    }
    .video_info_box .video_title{
        margin-top: 15px;
        font-size: 22px;
        line-height: 24px;
    }
    .video_info_box .line{
        margin: 15px 0;
    }
    .video_info_box .trader_introduction{
        font-size: 12px;
        letter-spacing: -1.1px;
    }

    .intro_video_box{
        font-size: 40px;
    }

    .main_link_container.mobile{
        gap:15px;
    }
    .main_link_box{
        flex-direction: column;
    }
    .main_link_title{
        font-size: 16px;
    }
    .main_link_description{
        margin:auto;
        font-size: 12px;
    }
    .main_link_cs_center_info{
        margin-top: 0;
        font-size: 12px;
    }

    .intro_icon_mobile{
        min-width:240px;
    }
}