* {
    margin: 0;
    padding: 0;
}
ul, li {
    list-style: none;
}
a {
    color: black;
}


div#modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,.7);
    z-index: 9999;
}
div#modal>div#videoContainer {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60%;
    padding-bottom: 31.5%;
    transform: translate(-50%,-50%);
    background-color: white;
}
div#modal>div#videoContainer>div#iframeBox {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}
div#modal>div#videoContainer>div#iframeBox>iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
div#modal>div#videoContainer>div#cross {
    position: absolute;
    top: 0;
    right: -10%;
    width: 10%;
    padding-bottom: 10%;
    background-color: white;
}
div#modal>div#videoContainer>div#cross>span {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 2px;
    background-color: black;
    border-radius: 10px;
    transform: translate(-50%,-50%);    
}
div#modal>div#videoContainer>div#cross>span:first-child {
    transform: rotate(-45deg)
}
div#modal>div#videoContainer>div#cross>span:last-child {
    transform: rotate(45deg)
}


div#fixed {
    position: fixed;
    top: 50%;
    right: 0;
    width: 200px;
    transform: translateY(-50%);
    z-index: 9995;
}
div#fixed>ul>li {
    margin-top: .5vw;
}
div#fixed>ul>li>a {
    display: block;
    width: 100%;
}
div#fixed>ul>li>a>img {
    display: block;
    width: 100%
}


div#warning {
    background-color: #000000;
}
div#warning>div {
    width: 1200px;
    margin: auto
}
div#warning>div>img {
    display: block;
    width: 100%;
}


div#title {
    min-width: 1200px;
}
div#title>img {
    display: block;
    width: 100%;
}


div#first {
    background-color: #5f0197;
}
div#first>div {
    width: 1200px;
    margin: auto
}
div#first>div>img {
    display: block;
    width: 100%;
}


div#second {
    position: relative;
    background-color: #ca7efb;
}
div#second>div.imgbox {
    width: 1200px;
    margin: auto
}
div#second>div.imgbox>img {
    display: block;
    width: 100%;
}
div#second>div#slide {
    position: absolute;
    top: 29%;
    left: 50%;
    width: 1080px;
    transform: translateX(-50%);
    overflow: hidden;
}
div#second>div#slide>ul {
    display: flex;
    width: 300%;
    transition: all .5s;
}
div#second>div#slide>ul>li {
    width: calc(100%/3);
}
div#second>div#slide>ul>li>img {
    display: block;
    width: 98%;
    margin: auto;
}
div#second>a {
    position: absolute;
    top: 88%;
    left: 50%;
    width: 34.7%;
    height: 3vw;
    border-radius: 500px;
    transform: translateX(-50%);
}


div#third {
    min-width: 1200px;
}
div#third>img {
    display: block;
    width: 100%;
}



div#fourth {
    position: relative;
    background-color: #facd4c;
}
div#fourth>div.imgbox {
    width: 1200px;
    margin: auto
}
div#fourth>div.imgbox>img {
    display: block;
    width: 100%;
}
div#fourth>div#fourthContent {
    position: absolute;
    top: 27%;
    left: 50%;
    width: 1000px;
    transform: translateX(-50%);
}
div#fourth>div#fourthContent>ul {
    display: flex;
    flex-wrap: wrap;
}
div#fourth>div#fourthContent>ul>li {
    width: calc(100%/3);
    cursor: pointer;
}
div#fourth>div#fourthContent>ul>li:nth-child(1) {
    background-image: url(/landing/chbio/PC/images/btn1off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li:nth-child(2) {
    background-image: url(/landing/chbio/PC/images/btn2off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li:nth-child(3) {
    background-image: url(/landing/chbio/PC/images/btn3off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li:nth-child(4) {
    background-image: url(/landing/chbio/PC/images/btn4off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li:nth-child(5) {
    background-image: url(/landing/chbio/PC/images/btn5off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li:nth-child(6) {
    background-image: url(/landing/chbio/PC/images/btn6off.png);
    background-repeat: no-repeat;
}
div#fourth>div#fourthContent>ul>li>img {
    display: block;
    width: 99%;
    padding-bottom: 1%;
    opacity: 0;
}
div#fourth>div#fourthContent>ul>li>img.on {
    opacity: 1;
}
div#fourth>div#fourthContent>div#contentBox {
    display: flex;
    margin-top: 3vw;
}
div#fourth>div#fourthContent>div#contentBox>div#teacherSlide {
    width: 42%;
    overflow: hidden
}
div#fourth>div#fourthContent>div#contentBox>div#teacherSlide>ul {
    display: flex;
    width: 300%;
    transition: all .5s;
}
div#fourth>div#fourthContent>div#contentBox>div#teacherSlide>ul>li {
    width: calc(100%/3);
}
div#fourth>div#fourthContent>div#contentBox>div#teacherSlide>ul>li>img {
    display: block;
    width: 100%;
}
div#fourth>div#fourthContent>div#contentBox>div#topicThumb {
    width: 58%;
}
div#fourth>div#fourthContent>div#contentBox>div#topicThumb>ul>li {
    display: none;
    cursor: pointer;
}
div#fourth>div#fourthContent>div#contentBox>div#topicThumb>ul>li.on {
    display: block;
}
div#fourth>div#fourthContent>div#contentBox>div#topicThumb>ul>li>img {
    display: block;
    width: 100%;
}


div#fifth {
    background-color: #5f0197;
}
div#fifth>div {
    width: 1200px;
    margin: auto
}
div#fifth>div>img {
    display: block;
    width: 100%;
}


div#sixth {
    background-color: #dc9eff;
}
div#sixth>div {
    width: 1200px;
    margin: auto
}
div#sixth>div>img {
    display: block;
    width: 100%;
}


div#seventh {
    background-color: #efefef;
}
div#seventh>div {
    position: relative;
    width: 1200px;
    margin: auto
}
div#seventh>div>img {
    display: block;
    width: 100%;
}
div#seventh>div>img:nth-child(2) {
    position: absolute;
    top: 41.4%;
    left: 150px;
    width: 479.55px;
    cursor: pointer;
}
div#seventh>div>a:last-child {
    position: absolute;
    top: 86%;
    left: 67.7%;
    width: 19.7%;
    height: 2vw;
    border-radius: 500px;
}


div#eighth {
    background-color: #5f0197;
}
div#eighth>div {
    position: relative;
    width: 1200px;
    margin: auto
}
div#eighth>div>img {
    display: block;
    width: 100%;
}
div#eighth>div>a:nth-child(2) {
    position: absolute;
    top: 59%;
    left: 8.8%;
    width: 290px;
    height: 60px;
}
div#eighth>div>a:nth-child(3) {
    position: absolute;
    top: 59%;
    left: 38%;
    width: 290px;
    height: 60px;
}
div#eighth>div>a:nth-child(4) {
    position: absolute;
    top: 59%;
    left: 67%;
    width: 290px;
    height: 60px;
}