/* main css */
body {
    font-family: "Open Sans", sans-serif;
    background-color: black;
    overflow: hidden;
}

main, section, div, img, button {
    position: absolute;
}

main {
    width: 2250px;
    height: 1500px;
    background-color: white;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
}

section {
    width: 100%;
    height: 100%;
    display: none;
}

#screen1 {
    display: block;
}

.frame {
    left: 730px;
    top: 160px;
    /* top: 247px; */
    display: none;
}

#frame1,#title-txt {
    display: block;
}

#main-title{
    left: 110px;
    top: 50px;
    font-size: 150px;
    font-weight: 800;
    color: #0075bf;
}

.sub-title {
    left: 110px;
    top: 220px;
    font-size: 60px;
    font-weight: 700;
    color: #0075bf;
}

.intro-container {
    left: 735px;
    top: 330px;
    width: 755px;
    height: 1024px;
    /* background-color: #0075bf; */
    padding: 40px;
}

.intro-container * {
    position: static;
}

.history-txt {
    background-color: white;
    color: #0075bf;
    border: solid 2px #0075bf;
    border-radius: 10px;
    padding: 30px 40px;
    font-size: 23px;    
    text-align: justify;
}

.learn-more-txt {
    margin-top: 60px;
    font-size: 38px;
    font-weight: 600;
    color: #0075bf;
}

button {
    background: none;
    color: inherit;
    border: none;
    font: inherit;
    outline: inherit;
    cursor: pointer;
}

.to-screen-btn{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100px;
    font-size: 2rem;
    text-align: center;
    border-radius: 10px;
    padding: 0;
    color:#fff;
    background-color: #0075bf;
    margin-top: 30px;
    overflow: hidden;
    cursor: pointer;
}

.to-screen-btn > div:first-child {
    padding: 30px;
    font-size: 33px;
    color: #0075bf;
    font-weight: 600;
}

.to-screen-btn > div:last-child {
    width: 70px;
    height: 130px;
    background-color: #0075bf;
    color: white;
    font-size: 80px;
    display: flex;
    justify-content: center;
    flex-shrink: 0;
}

.click-through {
    pointer-events: none;
}

#start-btn{
    width: 100%;
    height: 100%;
    font-size: 40px;
    font-weight: 600;
    padding-top: 1300px;
    cursor: pointer;
    color:#fff;
}

#back-btn{
    width: 70px;
    height:130px;
    background-color: #0075bf;
    border-radius: 0 10px 10px 0;
    color: #fff;
    font-size: 80px;
    font-weight: 600;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    justify-content: center;
}

/*** Screen 2 ***/
#screen2 .flower{
    right: 250px;
    bottom: 361px;
    z-index: 20;
    width: 280px;
}
#screen2 .timeline{
    width: 100%;
    height: 160px;
    background-color: #0075bf;
    bottom: 10%;
}
#screen2 .nav-link{
    font-size: 60px;
    font-weight: 700;
    color: #fff;
    position: absolute;
    opacity: 0.5;
    cursor: pointer;
}
#screen2 .origins{
    left:20%;
    bottom: 13.5%;
}
#screen2 .present{
    left: 50%;
    transform: translateX(-50%);
    bottom: 13.5%;
}
#screen2 .future{
    left:70%;
    bottom: 13.5%;
}
#screen2 .content{
    background-color: #fff;
    border-radius: 8px;
    height: 660px;
    width: 1488px;
    left: 50%;
    top: 28%;
    transform: translateX(-50%);
    border:6px solid #0075bf;
}
#screen2 .content img{
    width: 689px;
    left: -138px;
    top: -43px;
}
#screen2 .content h2{
    font-size: 55px;
    position: absolute;
    font-weight: 700;
    left: 580px;
    top: 32px;
    color: #0178c3;
}
#screen2 .content .data{
    font-size: 27px;
    width: 800px;
    left: 580px;
    color:#0178c3;
}
#screen2 .content .data:nth-child(3){
    top: 129px;
}
#screen2 .content .data:nth-child(4){
    top: 278px;
}
#screen2 .content .data:nth-child(5){
    top: 431px;
}
#screen2 .content .data p{
    font-weight: 600;
    font-size: 27px;
    background-color: #dbeffc;
    padding: 1.5rem;
    border-radius: 1rem;
    width: 870px;
}
#screen2 .content .data strong{
    font-weight: 800;
}
#screen2 .content .content1{
    width:100%;
}
#screen2 .content .content2{
    width:100%;
}
#screen2 .content .content3{
    width:100%;
}
#screen2 .hintmessage{
    font-size:35px;
    left:50%;
    position:absolute;
    transform:translateX(-50%);
    font-weight: 600;
    color:#0075bf;
    bottom:60px;
}

/*** Screen3 ***/
#screen3 .timeline{
    width: 100%;
    height: 160px;
    background-color: #0075bf;
    bottom: 5%;
}
#screen3 .nav-link{
    font-size: 60px;
    font-weight: 700;
    color: #fff;
    position: absolute;
    opacity: 0.5;
    cursor: pointer;
}
#screen3 .information{
    left:16%;
    bottom: 8%;
}
#screen3 .activities{
    left: 50%;
    transform: translateX(-50%);
    bottom: 8%;
}
#screen3 .classification{
    left:68%;
    bottom:8%;
}
#screen3 .welcome-msg{
    width: 1183px;
    background-color: #fff;
    font-size: 32px;
    text-align: center;
    padding: 50px;
    left: 50%;
    transform: translateX(-50%);
    top: 26%;
    border-radius: 14px;
    border: 6px solid #0075bf;
    color: #0075bf;
}
#screen3 .welcome-msg p{
    font-weight: 500;
}
#screen3 .welcome-msg .main{
    position: relative;
    margin-bottom: 20px;
    width: 700px;
    border-radius:15px;
}
#screen3 .welcome-msg .hintmessage{
    display: block;
    margin-top: 20px;
    font-weight: 700;
}
#screen3 .welcome-msg .wood1{
    width: 279px;
    left: -30px;
    top: -30px;
}
#screen3 .welcome-msg .wood2{
    width: 279px;
    right: -30px;
    bottom: -30px;
}

#screen3 .content .img1{
    width: 571px;
    top: -7px;
    left: -545px;
    border-radius: 20px 0 0 20px;
}
#screen3 .content{
    width: 100%;
    height:100%;
    background-color: #000000c4;
    z-index: 1000;
}
#screen3 .content > div{
    width: 1157px;
    height: 762px;
    background-color: #fff;
    left: 62%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 20px;
    border: 8px solid #0075bf;
    color: #0075bf;
    text-align: center;
    padding: 60px 50px;
}
#screen3 .content > div h3{
    font-size: 50px;
    font-weight: 800;
}
#screen3 .content > div p{
    font-size: 36px;
    font-weight: 500;
}
#screen3 .content > div div{
    text-align: left;
    width: 45%;
    margin-top: 40px;
}
#screen3 .content > div div p{
    font-size: 32px;
    margin-top: 17px;
}
#screen3 .content > div div h4{
    font-size: 35px;
    font-weight: 700;
    margin-left: 90px;
    margin-top: 11px;
}
#screen3 .close{
    left: 89%;
    top: 21%;
    cursor: pointer;
}

#screen3 .flower{
    right: 9%;
    bottom: 19%;
    z-index: 1;
    width: 204px;
}

#screen3 .content > .content3 div h4 {
    margin-left: 0;
}

#screen3 .content > .content3 div p{
    margin-top: 2px;
}


/*** Screen 4 ***/
#screen4 .timeline{
    width: 100%;
    height: 160px;
    background-color: #0075bf;
    bottom: 14%;
}
#screen4 .nav-link{
    font-size: 47px;
    font-weight: 700;
    color: #fff;
    position: absolute;
    opacity: 0.5;
    cursor: pointer;
}
#screen4 .bird1{
    left:5%;
    bottom: 17.5%;
}
#screen4 .bird2{
    left: 33%;
    bottom: 17.5%;
}
#screen4 .bird3{
    left:53%;
    bottom: 17.5%;
}
#screen4 .bird4{
    left: 77%;
    bottom: 17.5%;
}
#screen4 .content{
    width: 1290px;
    z-index: 1;
    height: 620px;
    background-color: #ffff;
    padding: 30px;
    left: 50%;
    top: 421px;
    transform: translateX(-50%);
    border-radius: 15px;
    border: 6px solid #0075bf;
}
#screen4 .content .left{
    width: 470px;
    height: 551px;
}
#screen4 .content .left img{
    position:relative;
}
#screen4 .content > div{
    width: 95%;
}
#screen4 .content .bird2pic{
    top: 37px;
}
#screen4 .content p{
    margin-left: 500px;
    width: 710px;
    font-size: 32px;
    color:#0075bf;
    font-weight: 500;
    margin-bottom: 15px;
}
#screen4 .content strong{
    margin-left: 500px;
    width: 710px;
    font-size: 32px;
    color:#0075bf;
    font-weight: 800;
}
#screen4 .content ul{
    margin-left: 500px;
    width: 710px;
    font-size: 32px;
    color:#0075bf;
    font-weight: 500;
}
#screen4 .content ul li{
    list-style: disc;
    margin-left: 2.5rem;
    margin-top: 1rem;
}
#screen4 .hintmessage{
    font-size:35px;
    left:50%;
    position:absolute;
    transform:translateX(-50%);
    font-weight: 600;
    color:#0075bf;
    bottom:60px;
}

video{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.fronttitle{
    text-align: center;
    width:100%;
    top: 50px;
    font-size: 150px;
    font-weight: 800;
    color: #fff;
}

.frontdesc{
    color: #fff;
    font-size: 3rem;
    text-align: center;
    width: 100%;
    position: absolute;
    top: 235px;
}

.wrapper{
    width: 1500px;
    height: 790px;
    left: 50%;
    transform: translateX(-50%);
    top: 430px;
    border-radius: 20px;
    background-color: #fff;
}

.rightsec{
    width: 57%;
    right: 40px;
    top: 21px;
}

.rightsec p{
    font-size: 1.8rem;
    font-weight: 600;
    color:#0075bf;
}

.rightsec span{
    display: block;
    font-size: 1.8rem;
    margin-top: 17px;
    font-weight: 700;
    color:#0075bf;
}

.front{
    width: 590px;
    left: -22px;
    top: -60px;
    border-radius: 20px;
}

.birdd{
    width: 330px;
    right: 330px;
    top: 87px;
}

.bird-1{
    right: -90px;
    bottom: 560px;
    z-index: 1;
    width: 610px;
}