@import url('//fonts.googleapis.com/css?family=Nanum+Myeongjo:400,700,800|Noto+Sans+KR:100,300,400,500,700,900&display=swap&subset=korean');

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    letter-spacing: -0.07em;
}

p {
    margin: 0;
    font-size: 17px;
    font-weight: 300;
    line-height: 1.7;
    letter-spacing: -0.05em;
}

.style_none{
    list-style: none;
    padding-left: 0;
}
.red{
     color: #841096;
}
.desktop_br {
    display: none;
}

.tablet_br {
    display: none;
}

.wide_mobile_br {
    display: none;
}

.narrow_mobile_br{
    display: none;
}

.underline {
    text-decoration: underline;
}

.bold {
    font-weight: bold;
}

.bold_normal {
    font-weight: normal;
}

.bold_500 {
    font-weight: 500;
}

.colored {
    color: #000000;
}

.section {
    text-align: center;
}

.container {
    max-width: 902px;
    margin: 0 auto;
}

.content_container {
    display: inline-block;
}

.center {
    text-align: center;
}

.horizontal_title {
    display: inline-block;
    height: 55px;
    margin: 0;
    padding: 7px 28px;
    border-left: solid 4px #000000;
    border-right: solid 4px #000000;
    background-color: white;
    font-size: 28px;
    font-weight: bold;
    line-height: 1.46;
    text-align: center;
    color: #000000;
}

.horizontal_title::before {
    content: '';
    display: block;
    position: absolute;
    width: 100%; height: 4px;
    left: 0; margin-top: 18.5px;
    background-color: #000000;
    z-index: -1;
}

.lined_title {
    position: relative;
    margin: 0;
    padding-left: 24.5px;
    font-size: 22px;
    font-weight: bold;
    line-height: 1.5;
    text-align: left;
}

.lined_title::before {
    content: '';
    display: block;
    width: 4.5px; height: 100%;
    left: 0;
    position: absolute;
    background: white;
}

.main_title {
    display: inline-block;
    position: relative;
    margin: 30px auto 0;
    padding: 20px 70px;
    font-size: 34px;
    font-weight: 500;
    line-height: 1.47;
    border-radius: 0 20px 20px;
    background-color: #4b3591;
    text-align: center;
    color: white;
}

.main_title::before {
    content: '';
    display: block;
    width: 30px; height: 30px;
    position: absolute;
    left: 0; top: -30px;
    background: url('https://www.hakdokman.com/courses/asset/nano_da/maintitle_pie.svg');
    background-size: 30px;
}

.main_title_desc {
    margin: 32px auto 60px;
    font-size: 24px;
    font-weight: normal;
    line-height: 1.7;
}

.main_title_desc .emphasize {
    text-decoration: underline;
    color: #ed5ed5;
}

.sub_title {
    display: inline-block;
    position: relative;
    margin: 15px auto 0;
    padding: 10px 27px;
    font-size: 22px;
    font-weight: bold;
    line-height: 1.14;
    border-radius: 0 10px 10px;
    background-color: #f4f4f4;
    box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.16);
    text-align: center;
    color: #000000;
}

.sub_title::before {
    content: '';
    display: block;
    width: 15px; height: 15px;
    position: absolute;
    left: 0; top: -15px;
    box-shadow: -10px 3px 6px -10px rgba(0, 0, 0, 0.16);
    background: url('https://www.hakdokman.com/courses/asset/nano_da/subtitle_pie.svg');
    background-size: 15px;
}

.dashed_line {
    width: 100%; height: 0;
    max-width: 880px;
    margin: 56px auto;
    border: dashed 1.5px #BC85E6;
}

.column {
    display: inline-block;
    vertical-align: top;
    font-size: 0;
}

.btn_apply {
    cursor: pointer;
}

.ordinal {
    position: absolute;
    width: 60px; height: 59px;
}

header #navigation {
    color: #000000;
}

#headline {
    background: linear-gradient(to right, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.1)),url('https://www.hakdokman.com/courses/asset/nano_da/topbg.png') ; 
    background-size: cover;
    height: 600px;
    background-repeat: no-repeat;
}

    #headline .container {
        padding: 112px 30px 64px 30px;
        text-align: left;
    }

    #headline .title h1 {
        font-size: 50px;
        font-weight: bold;
        line-height: 1.5;
        color: #fff;
        margin: 0;
    }

    #headline .title p {
        font-size: 22px;
        line-height: 1.5;
        margin: 18px 0 30px 0;
        color: white;
    }

    #headline .btn_apply {
        width: 240px; height: 50px;
        padding: 8px 0;
        border-radius: 90px;
        background-color: #000000;
        border: 2px solid #A2BAFF;
        font-size: 19px;
        font-weight: 500;
        line-height: 1.45;
        text-align: center;
        color: white;
    }

    #headline .btn_apply:hover {
        width: 240px; height: 50px;
        padding: 8px 0;
        border-radius: 90px;
        background-color: #000000;
        border: 2px solid #FFCAED;
        font-size: 19px;
        font-weight: 500;
        line-height: 1.45;
        text-align: center;
        color: #FFCAED;
    }

#section1 {
    padding: 24px 0;
    background-color: #000;
}

    #section1 .container {
        font-size: 23px;
        font-weight: 500;
        line-height: 1.75;
        color: white;
        letter-spacing: -0.034em;
    }

    #section1 .emphasize {
        color: #FCA6DE;
        font-weight: 600;
    }

#section2 {
    padding: 132px 0;
    background-color: #f4f4f4;
    text-align: left;
}

    #section2 .list {
        width: 777px;
        margin: auto;
        font-size: 0;
    }

    #section2 .item {
        display: inline-block;
        margin: 0 83px 87px 0;
        vertical-align: top;
    }

    #section2 .item .icon {
        width: 83px; height: 83px;
        margin: 0 16px 142px 0;
        float: left;
    }

    #section2 .item .title {
        margin: 0;
        margin-left: 99px;
        font-size: 24px;
        font-weight: bold;
        line-height: 1.5;
        text-align: left;
        color: #4b3591;
    }

    #section2 .item .title::after {
        content: '';
        display: block;
        width: 242px; height: 0;
        border: solid 1.5px #4b3591;
        margin-top: 8px;
    }

    #section2 .item .content {
        width: 246px;
        font-size: 17px;
        line-height: 1.59;
        margin: 20px 0 0 99px;
    }

#section3 {
    padding-top: 156px;
}
    #section3 .main_title_desc{
        font-size: 19px;
        padding-top: 10px;
    }


#section4 {
    margin-top: 80px;
    background-color: black;
}
    #section4 .degree{
        background: url('https://www.hakdokman.com/courses/asset/nano_da/degree.png');
        background-size: contain;
        background-repeat: no-repeat;
        height: 400px;
    }
    #section4 .degree h4{
        display: block;
        font-size: 32px;
        color: #EBA7FC;
        padding-top: 100px;
        margin-left: 500px;
    }
    #section4 .degree_info{
        display: block;
        color: white;
        text-align: left;
        font-weight: 400;
        font-size: 20px;
        margin-left: 500px;
        padding: 50px;
    }


#section5 {
    padding: 120px 0;
}

    #section5 .schedule {
        width: 830px; height: 574px;
        padding: 66px 110px;
        letter-spacing: -0.04em;
        margin: auto;
        text-align: left;
        background: url('https://www.hakdokman.com/courses/asset/nano_da/schedule_desktop.svg');
        background-size: cover;
        background-repeat: no-repeat;
    }

    #section5 .schedule .item::after {
        content: '';
        display: block;
        clear: both;
    }

    #section5 .schedule .item .title {
        width: 96px; height: 100%;
        float: left;
        padding-right: 28px;
        font-size: 19px;
        font-weight: bold;
        line-height: 1.53;
        text-decoration: underline;
        text-align: left;
        color: #000000;
    }

    #section5 .schedule .item .part {
        background-color: #ebc5b6;
        padding: 3px;
    }

    #section5 .schedule .item .content {
        width: 514px; height: 100%;
        float: left;
        padding-left: 48px;
        padding-bottom: 20px;
        border-left: solid 1px #000000;
        font-size: 19px;
        line-height: 1.53;
    }
    #section5 .schedule .item .content .refer_box{
        background-color: #efefef;
        margin-top: 20px;
        padding: 10px 24px;
    }    
    #section5 .schedule .item .content .refer{
        font-size: 16px;
        font-weight: 500;
        color: #4796ff;
    }    
    #section5 .schedule .item .content .refer_content a:hover{
        color: #6F1F7A;
    }    
    #section5 .schedule .item .content .refer_content{
        font-size: 17px;
        font-weight: 400;
        color: dimgray;
    }
    #section5 .schedule .item:last-child .content {
        padding-bottom: 0;
    }

#section6{
    background: linear-gradient(to top, rgba(39, 24, 102, 1),rgba(71, 37, 130, 1));
    padding: 50px;
}
    #section6 .container{
        width: 100%; 
        max-width: 1000px;
        overflow: hidden;
        padding: 80px 0;   
    }
    #section6 p.four_p{
        margin: 20px 20px 50px 20px;
        color: white;
        font-size: 24px;
        text-align: left;
    }
    #section6 img{
        display: inline-block;
        width: 23%;
        border-radius: 5px;
        background-color: white;
        margin: 5px;
        box-shadow: 5px 5px 10px rgba(0,0,0,0.4);
    }
    #section6 .four_detail{
        margin: 0;
    }
    #section6 .four_curi{
        margin: 100px 0;
    }
    #section6 .list{
        height: auto;
        margin: 0 auto;
    }
    #section6 #yt_player {
        display: inline-block;
        padding: 1px;
        width: 480px; height: 300px;
        background-color: black;
        border-radius: 5px;
    }
    #section6 #yt_player:first-child{
        margin-right: 10px;
    }

#section7 {
    padding: 30px 0 0 0;
}
    #section7 .container{
        max-width: 972px;
        padding: 80px;
    }
    #section7 .container_photo {
        width: 100%; max-width: none;
        overflow: hidden;
        text-align: left;
    }
    #section7 .class_desc {
        text-align: center;
        width: 830px;
        margin: 80px auto;
        font-size: 34px;
        font-weight: 700;
        line-height: 1.36;
        color: #000000;
    }

    #section7 .item_list {
        font-size: 0;
        -webkit-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -moz-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -o-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
    }

    #section7 .item_list .item {
        display: inline-block;
        width: 320px; 
        margin-right: 8px;
    }

    #section7 .item_list .item img {
        width: 100%; height: 100%;
    }

    #section7 .page_indicator {
        width: 230px; height: 44px;
        margin: 64px auto;
    }

    #section7 .page_indicator .navigator {
        width: 44px; height: 44px;
        padding: 9px 18px;
        border-radius: 22px;
        box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.17);
        color: #000000;
        cursor: pointer;
    }

    #section7 .page_indicator .navigator img {
        width: 6.8px; height: 11.9px;
    }

    #section7 .page_indicator .navigator.left {
        float: left;
        margin-right: 21px;
    }

    #section7 .page_indicator .navigator.right {
        float: right;
    }

    #section7 .page_indicator .navigator.right img {
        -webkit-transform: rotateZ(180deg);
        -moz-transform: rotateZ(180deg);
        -ms-transform: rotateZ(180deg);
        -o-transform: rotateZ(180deg);
        transform: rotateZ(180deg);
    }

    #section7 .page_indicator .navigator::after {
        clear: both;
    }

    #section7 .page_indicator .indicator {
        width: 8px; height: 8px;
        float: left;
        margin: 18px 4px;
        border-radius: 4px;
        background-color: black;
        opacity: 0.2;
    }

    #section7 .page_indicator .indicator.active {
        opacity: 1;
        background-color: #4c14ad;
    }


#section8 {
    padding: 80px 0 142px;
    background-color: 000000;
}

    #section8 .container{
        width: 100%; 
        max-width: 1200px;
        overflow: hidden;
    }
    #section8 .teachers{
        display: inline-block;
        width: 25%;
        max-width: 260px;
        height: 500px;
        margin: 10px;
        vertical-align: top;
        background-color: #f7f7f7;
        border-radius: 5px;
        box-shadow: 1px 1px 6px rgba(0,0,0,0.2);
    }
    #section8 .teacher8{
        background-color: white;
        box-shadow: none;
    }
    #section8 .teacher_img img{
        width: 260px;
        height: auto;
        border-top-right-radius: 5px;
        border-top-left-radius: 5px;
    }   
    #section8 .teacher_name{
        padding: 10px;
    }
    #section8 .teacher_introduce{
        font-size: 16px;
        letter-spacing: -0.04em;
        font-weight: 300;
        height: 120px;
    }
    #section8 .show_interview{
        display: block;
        width: 80%;
        margin: 10px auto;
        padding: 5px 0 7px 0;
        border: 1.5px solid;
        bottom: 0;
        letter-spacing: -0.03em;
    }
    #section8 .show_interview:hover{
        color: purple;
        border: 1.5px solid purple;
        background-color: #eaeaea;
    }


#section9{
    
}
    #section9 .process_info{
        margin: 80px 0;
        display: block;
    }
    #section9 .process_info p{
        font-size: 28px;
        text-align: left;
        margin: 150px 60px 50px 60px;
    }
    #section9 .process_info img.hotdog{
        display: block;
        width:50%;
        max-width: 500px;
        margin: 10px auto;
    }
    #section9 .process_info img.process{
        display: block;
        width:80%;
        max-width: 750px;
        margin: 10px auto;
    }
    #section9 .process_info .curi_detail{
        display: block;
    }
    #section9 .process_info .curi_detail img{
        display: inline-block;
        width: 40%;
        box-shadow: 3px 3px 10px rgba(0,0,0,0.4);
        margin: 10px;
        border-radius: 5px;
    }

#section10 {
    padding: 154px 0 88px;
}
    #section10 .horizontal_title{
        font-size: 28px;
    }

    #section10 .container {
        max-width: 972px;
    }

    #section10 .column_list {
        margin: 98px auto 0;
    }

    #section10 .column.right {
        margin-left: 42.5px;
    }

    #section10 .item {
        position: relative;
        padding: 0 0 32px 22.5px;
        border-left: dashed 1px #000000;
        text-align: left;
    }

    #section10 .item.opened {
        padding-bottom: 44px;
    }

    #section10 .item::before {
        content: '';
        display: block;
        position: absolute;
        width: 6px; height: 6px;
        left: -4.5px; top: -4.5px;
        border-radius: 9px;
        border: solid 1.5px #000000;
        background-color: white;
    }

    #section10 .item:last-of-type {
        padding-bottom: 0;
    }

    #section10 .column.right .item:last-of-type {
        border-left: none;
    }

    #section10 .item .title {
        position: relative;
        top: -12px;
        margin: 0 0 12px;
        font-size: 19px;
        font-weight: 500;
        line-height: 1.47;
        color: purple;
    }
    #section10 .item .title > span{
        box-shadow: 0 .45em 0 0 #cef2ff;
    }

    #section10 .item .toggle {
        margin-right: 12px;
        width: 8px; height: 8px;
        padding-left: 8px;
        background: url('../asset/nano_da/toggle.svg');
        vertical-align: middle;
        overflow: hidden;
        -webkit-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -moz-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -o-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -webkit-transform: rotateZ(-90deg);
        -moz-transform: rotateZ(-90deg);
        -ms-transform: rotateZ(-90deg);
        -o-transform: rotateZ(-90deg);
        transform: rotateZ(-90deg);
    }

    #section10 .item.opened .toggle {
        -webkit-transform: rotateZ(0);
        -moz-transform: rotateZ(0);
        -ms-transform: rotateZ(0);
        -o-transform: rotateZ(0);
        transform: rotateZ(0);
    }


    #section10 .item .content {
        max-height: 0;
        margin: 0;
        -webkit-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        -moz-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        -o-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        overflow: hidden;
        color: #515151;
    }

    #section10 .item.opened .content {
        width: 400px;
        max-height: 700px;
    }

    #section10 .item .content .sub_content {
        font-weight: 300;
    }
    #section10 .main_title_desc{
        margin-top: 60px;
    }

#section11 {
    padding: 100px 0;
}
    #section11 .portfolio{
        margin: 80px 0;
        display: block;
    }
    #section11 .portfolio p{
        font-size: 28px;
        text-align: left;
        margin: 120px 10px 20px 10px;
    }
    #section11 .portfolio img{
        display: block;
        width:100%;
        max-width: 1000px;
        margin: 60px auto;
    }
    #section11 .student_portfolio{
        max-width: 1200px;
        margin: 0 auto;
        margin-bottom: 100px;
    }
    #section11 .student_portfolio .student_portfolio_card{
        display: inline-block;
        width: 30%;
        max-width: 360px;
        margin: 10px;
    }
    #section11 .student_portfolio a{
        display: block;
        margin-top: 10px;
        background-color: purple;
        padding: 8px;
        border-radius: 5px;
        color: white;
        cursor:pointer;
    }
    #section11 .student_portfolio a:hover{
        background-color: #3838a5; 
    }
    #section11 .student_portfolio img{
        display: block;
        width:100%; 
    }

#section12 {
    padding: 84px 0 80px;
    background: url('https://www.hakdokman.com/courses/asset/nano_da/webbg_desktop.svg'), #000000;
    background-repeat: no-repeat;
    background-position: top right;
    background-size: 435px;
    color: white;
    text-align: left;
}

    #section12 .lined_title .emphasize {
        color: #b682ff;
        font-weight: 500;
        text-decoration-line: underline;
    }

    #section12 .desc {
        margin-top: 52px;
        padding-left: 24.5px;
    }
    #section12 .sub_emp{
        color: #91b5ff;
        font-weight: 400;
    }

    #section12 .desc .emphasize_colored {
        color: #e285f7;
        font-weight: 400;
    }



#section15 {
    padding: 126px 0;
}

    #section15 .container {
        max-width: none;
    }

    #section15 .main_title_desc {
        margin: 62px auto;
    }

    #section15 .dashed_box {
        width: 776px;
        margin: 82px auto 65px;
        padding: 30px 0;
        border: dashed 1px #4759ff;
        background-color: #f7f9ff;
        text-align: center;
    }

    #section15 .dashed_box .box_title {
        margin-bottom: 18px;
        font-size: 20px;
        font-weight: 500;
        line-height: 1.45;
    }

    #section15 .dashed_box .box_title .emphasize {
        color: #4759ff;
    }

    #section15 .isa_example_title {
        margin-top: 155px;
        font-size: 28px;
        font-weight: bold;
        line-height: 1.54;
        color: #000000;
    }

    #section15 .isa_example_container {
        height: 380px;
        background-image: url('https://www.hakdokman.com/courses/asset/nano_da/isa_desktop.svg');
        background-size: 830px;
        background-position: center;
        background-repeat: no-repeat;
        border-top : solid 1.4px #000000;
        border-bottom : solid 1.4px #000000;
    }

    #section15 .isa_example_read {
    max-width: 800px;
    margin: 0 auto;
    font-size: 16px;
    padding: 30px ;
    line-height: 1.7em;
    }
    #section15 .isa_example_read li {
        letter-spacing: -0.04em;
        text-align: left;
        font-weight: 300;
        margin-top: 10px;
    }

    #section15 .isa_example_condition {
        display: inline-block;
        margin: 52px auto 42px;
        border-radius: 22px;
        border: solid 0.6px #4759ff;
        font-size: 0;
        overflow: hidden;
    }

    #section15 .isa_example_condition .column {
        font-size: 15px;
        font-weight: normal;
        line-height: 1.47;
        letter-spacing: -0.38px;
    }

    #section15 .isa_example_condition .column.left {
        padding: 11.5px 25px 10.5px;
        border-radius: 22px 0 0 22px;
        background-color: #4759ff;
        color: white;
    }

    #section15 .isa_example_condition .column.right {
        padding: 11px 22px;
        color: #4759ff;
    }

    #section15 .isa_example_condition ul {
        list-style: none;
        font-size: 0;
        margin: 0;
        padding-left: 0;
    }

    #section15 .isa_example_condition ul li {
        display: inline-block;
        font-size: 15px;

    }

    #section15 .isa_example_condition ul li::after {
        content: '|';
        margin: 0.5em;
    }

    #section15 .isa_example_condition ul li:last-of-type::after {
        content: '';
        margin: 0;
    }

    #section15 .isa_example_graph {
        display: block;
        width: 902px;
        margin: 42.1px auto 66.6px;
    }

    #section15 .isa_detail_btn {
        display: inline-block;
        margin: 18px auto 100px;
        padding: 12px 24px;
        border-radius: 90px;
        border: solid 2px #4c14ad;
        font-size: 18px;
        background-color: #fff;
        font-weight: 500;
        line-height: 1.45;
        color: #000;
        letter-spacing: -0.04em;
    }
    #section15 .isa_detail_btn:hover {
        border: solid 2px #4759ff;
        background-color: #eaf0fc;
        color: #4759ff;
    }

    #section15 .isa_detail_desc {
        margin: 0;
        font-size: 20px;
        font-weight: normal;
        line-height: 1.5;
    }

#section16 {
    padding-bottom: 146px;
    background: url('https://www.hakdokman.com/courses/asset/nano_da/desktop_bg_isa.png');
    background-repeat: no-repeat;
    background-size: 100% 965px;
}

    #section16 .container {
        width: 815px;
    }

    #section16 .isa_loan {
        margin-top: 175px;
    }

    #section16 .isa_loan::after {
        content: '';
        display: block;
        clear: both;
    }

    #section16 .content_box {
        padding: 46px 45px;
        border-radius: 30px;
        box-shadow: 3px 3px 6px 0 rgba(0, 0, 0, 0.16);
        text-align: left;
    }

    #section16 .content_box .title {
        margin: 0 auto 20px;
        font-size: 22px;
        font-weight: bold;
        color: #000000;
    }

    #section16 .content_box .content {
        font-size: 16px;
        font-weight: 300;
        line-height: 1.5;
    }
    #section16 .content_box_1 {
        width: 514px;
        background-color: white;
    }

    #section16 .content_box_2 {
        float: right;
        width: 412px;
        margin-top: -49px;
        color: white;
        background-color: #7451ff;
    }
    #section16 .content_box_2 h4.title{
        color: white;
    }
    #section16 .isa_condition {
        margin: 60px 0 0 54px;
        text-align: left;
    }

    #section16 .isa_condition .column.right {
        margin-left: 48px;
    }

    #section16 .isa_condition .title {
        margin: 0;
        font-size: 22px;
        font-weight: bold;
        line-height: 1.45;
    }

    #section16 .isa_condition .content {
        margin: 0;
    }

#section17 {
    padding: 6px 0 64px;
}

#section18 {
    padding: 79px 0 93px;
    background: url('https://www.hakdokman.com/courses/asset/nano_da/deco.svg'), #efefef;
    background-repeat: no-repeat;
    background-position: right bottom;
    background-size: 409px;
    text-align: left;
}

    #section18 .title {
        margin: 0 0 22px;
        font-size: 22px;
        font-weight: bold;
        line-height: 1.86;
        color: #000000;
    }

    #section18 .content {
        margin: 0;
        line-height: 1.6;
    }

#section19 {
    padding: 56px 0;
}

    #section19 .container, #section21 .container {
        font-size: 18px;
        line-height: 1.6;
        padding: 60px 0;
        color: #000000;
        letter-spacing: -0.04em;
    }

#section20 {
    padding: 115px 0 106px;
    background: linear-gradient(to top, rgba(71, 37, 130, 0.9), rgba(39, 24, 102, 0.7)), url('../asset/nano_da/class2.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    color: white;
}

    #section20 .main_title {
        background-color: white;
        color: #000000;
    }

    #section20 .main_title::before {
        background: url('https://www.hakdokman.com/courses/asset/nano_da/maintitle_whitepie.svg');
    }

    #section20 .main_title_desc {
        margin: 28px auto 42px;
        color: white;
    }

    #section20 .content_box {
        margin: 42px auto 65px;
        padding: 57px 92px;
        border-radius: 30px;
        background-color: #eaf0fc;
        font-size: 18px;
        font-weight: 500;
        line-height: 1.4;
        text-align: left;
        color: #000000;
        letter-spacing: -0.04em;
    }

    #section20 .content_box ul {
        list-style: none;
        margin: 0;
        padding-left: 0;
    }

    #section20 .content_box ul li {
        margin-bottom: 24px;
        padding-left: 50px;
        background: url('https://www.hakdokman.com/courses/asset/nano_da/check.svg');
        background-size: 28px 28px;
        background-position: left top;
        background-repeat: no-repeat;
    }

    #section20 .content_box ul li:last-of-type {
        margin-bottom: 0;
    }

    #section20 .content_box .apply_btn_row {
        background-position: left center;
        margin-bottom: 18px;
    }

    #section20 .content_box ul li.no_checkbox {
        background: none;
    }

    #section20 .content_box ul li .content {
        font-size: 16px;
        font-weight: 300;
        line-height: 1.65;
        letter-spacing: -0.03em;
    }

    #section20 .content_box .apply_btn_row .btn_apply {
        display: inline-block;
        width: 170px; height: 40px;
        padding: 8px 0;
        border-radius: 90px;
        border: solid 1.5px #7451ff;
        background-color: white;
        font-size: 16px;
        letter-spacing: -0.04em;
        font-weight: 500;
        text-align: center;
    }

    #section20 .content_box .apply_btn_row .arrow {
        display: inline;
    }

    #section20 .content_box .apply_btn_row .arrow::after {
        content: '\00a0\00a0→\00a0\00a0';
        display: inline;
    }

    #section20 .go_with {
        margin-top: 65px;
        font-size: 20px;
        font-weight: normal;
        line-height: 1.59;
    }

#section21 {
    padding: 62px 0;
}

#section22 {
    padding: 72px 0 100px;
    background-color: #f1f1f1;
}

    #section22 .container {
        max-width: 912px;
    }


    #section22 .faq_content {
        margin-top: 68px;
    }

    #section22 .faq_content .faq_item {
        width: 100%;
        margin: 14px 0;
        text-align: left;
        overflow: hidden;
    }

    #section22 .faq_content .faq_item .title {
        width: 100%;
        margin-right: 10px;
        padding: 15px 34px 15px 24px;
        background-color: white;
        cursor: pointer;
    }

    #section22 .faq_content .faq_item .title h4 {
        margin: 0;
        font-size: 17px;
        padding-left: 14.4px;
        padding-right: 20px;
        text-indent: -14.4px;
        word-break: keep-all;
        font-weight: 400;
        letter-spacing: -0.2px;
        line-height: 1.56;
    }

    #section22 .faq_content .faq_item .title .icon {
        position: relative;
        float: right;
        width: 18px; height: 18px;
        margin-top: 5px;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
        background: top center / cover no-repeat url('../asset/nano_da/plus.svg');
        padding-left: 20px;
        -webkit-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -moz-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -o-transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        transition: transform 250ms cubic-bezier(.25, .45, .45, .95);
        -webkit-transform: rotateZ(90deg);
        -moz-transform: rotateZ(90deg);
        -ms-transform: rotateZ(90deg);
        -o-transform: rotateZ(90deg);
        transform: rotateZ(90deg);
    }

    #section22 .faq_content .faq_item.opened .title .icon {
        -moz-box-sizing: border-box;
        box-sizing: border-box;
        background: top center / contain no-repeat url('https://www.hakdokman.com/courses/asset/nano_da/minus.svg');
        -webkit-transform: rotateZ(180deg);
        -moz-transform: rotateZ(180deg);
        -ms-transform: rotateZ(180deg);
        -o-transform: rotateZ(180deg);
        transform: rotateZ(180deg);
    }

    #section22 .faq_content .faq_item .content {
        width: 100%;
        max-height: 0;
        margin: 0px;
        font-size: 17px;
        -webkit-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        -moz-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        -o-transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        transition: max-height 250ms cubic-bezier(.25, .45, .45, .95);
        overflow: hidden;
    }

    #section22 .faq_content .faq_item .content p {
        margin-top: 10px;
        padding: 16px 24px;
        word-break: keep-all;
        background-color: #e5e5e5;
    }

    #section22 .faq_content .faq_item.opened .content {
        max-height: 500px;
        height: auto;
    }



.footer_float {
    position: fixed;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: flex;
    bottom: 0;
    width: 100%; height: 78.5px;
    font-size: 22px;
    font-weight: normal;
    line-height: 78.5px;
    letter-spacing: -0.04em;
    color: white;
    text-align: center;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.8);
    box-shadow: 0 0 5px 3px rgba(0, 0, 0, 0.16);
}

    .footer_float .footer_content {
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
        height: 100%;
    }

    .footer_float .btn_apply {
        display: block;
        width: 320px; height: 100%;
        padding: 20px 0 22.7px;
        background-color: #7451ff;
        opacity: 0.8;
        line-height: 1;
        font-weight: bold;
        cursor: pointer;
        color: white;
    }
    .footer_float .btn_apply:hover{
        opacity: 1;
    }

    .footer_float .btn_apply .text {
        line-height: 1.7;
        display: inline-block;
        position: relative;
    }
    
    .footer_float .btn_apply .centered {
        display: inline;
        position: relative;
    }
    
    .footer_float .btn_apply .ordinal {
        display: block;
        left: -66px; top: -48px;
    }

/* 데스크탑 전용 속성 */

@media only screen and (min-width: 1025px) and (max-width: 1130px){
    #section8 .teacher8{
        display: none;
    }
}

@media only screen and (min-width: 1025px) {
    .desktop_br {
        display: inline;
    }

    #section11 .container_1 .item:nth-child(2n) {
        margin-right: 0;
    }

    #section11 .container_1 .item:nth-last-of-type(-n+2) {
        margin-bottom: 0;
    }

    #section11 .container_2 .item:nth-child(2n) {
        margin-right: 0;
    }

    #section11 .container_2 .item:nth-last-of-type(-n+2) {
        margin-bottom: 0;
    }
    }

/* 데스크탑 및 태블릿용 속성 */

@media only screen and (min-width: 769px) {
    #section2 .item:nth-child(2n) {
        margin-right: 0;
    }

    #section2 .item:nth-last-of-type(-n+2) {
        margin-bottom: 0;
    }
}