@import "reset.css";

/*Style*/
html{
    font-family: Ubuntu, Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f4f4;
}

.topline{
    background-color: #50D8E3;
    height: 25px;
    display:block;
}

.nav{
    color: #50D8E3;
    margin-top: 17px;
    margin-left: 75px;
}

.nav p{
    font-weight: 350;
    font-family: Roboto;
}

h1{
    font-size: 1.8rem;
    line-height: 1.8em;
    font-weight: 600;
}

h2{
    font-size: 0.9rem;
    color: #999;
    line-height: 1.2em;

}

.mainbody{
    width: 80%;
    margin-left:auto;
    margin-right:auto;
    margin-top: 5%;
    background: #FFFFFF;
    box-shadow: 0 0 40px 0 rgba(0,0,0,0.25);
    border-top-left-radius: 35px;
    border-top-right-radius: 35px;
    height: 1800px;
}

#title{
    background: #50D8E3;
    width: 45%;
    height: 45px;
    margin-left:0%;
    border-top-left-radius: 35px;
    border-bottom-right-radius: 35px;
    position: absolute;


}

#index-mainbody{
    margin-top: 100px;
}

#index-mainbody h1{
    font-family: Ubuntu;
    font-size: 22px;
    color: #4A4A4A;
    font-weight: 500;
    text-align: center;
    line-height: 1.5em;
    margin-top: 40px;
    margin-bottom: 20px;
    margin-left:auto;
    margin-right:auto;

}

#index-mainbody h2{
    font-family: Ubuntu;
    font-size: 18px;
    color: #4A4A4A;
    font-weight: 400;
    text-align: center;
    line-height: 1.5em;
    margin-top: 40px;
    margin-bottom: 20px;
    margin-left:auto;
    margin-right:auto;

}


.mainbody h1{
    font-size: 22px;
    font-family: Ubuntu;
    color: white;
    font-weight: 500;
    margin-left:auto;
    text-align: center;
}


#instruction{
    margin-left: 15%;
    width: 70%;
}

#instruction-title{
    padding-top: 5px;
    padding-bottom: 10px;
    margin-top:0;
    margin-bottom: 40px;
    border-top-right-radius: 35px;
    border-top-left-radius: 35px;
    background-color: #514F4E;
    /*background-color: rgba(80, 216, 227, .2);*/
    width: 100% !important;
    z-index: -10;
    /*position: absolute;*/
}

#instruction-title h1{
    color: white;
    font-weight: 450;
    text-align: left;
    margin-top: 70px;
    margin-bottom: 20px;
    margin-left: 15%
}


#vertical-line{
    width:15px;
    height:12px;
    border-bottom-right-radius: 20px;
    border-top-right-radius: 20px;
    background-color: #50D8E3;
    margin-left: 12%;
    margin-top:85px;
    float: left;
}

#instruction h1{
    color: #4A4A4A;
    text-align: left;
    margin-top: 10%;
    margin-bottom: 20px;
}

#instruction h2{
    font-family: Ubuntu;
    font-size: 18px;
    color: #50D8E3;
    font-weight: 450;
    text-align: left;
    line-height: 1.5em;
    margin-top: 40px;
    margin-bottom: 20px;
}

#instruction p{
    font-family: Roboto;
    color: #4A4A4A;
    font-weight: 300;
    line-height: 1.5em;
}

#proportion{
    Margin-left: 10%;
}

em{
    font-weight: 450;
}

#watch-video h2{
    margin-top: 50px !important;
    margin-bottom: 50px !important;
}

#player-container{
    background-color: #f4f4f4;
    height: 500px;
    margin-top: 40px;
}

section {
    position: relative;
}

#player{
    position: absolute;
    width: 100%;
    z-index: -10;
    margin-top: 10px;
}

iframe{
    margin-left: auto;
    margin-right:auto;
    width: 100%;
}

/*#title{*/
    /*margin: 30px 0 20px 0;*/
/*}*/

#invent1, #invent2, #invent3 {
    display: none;
    position: absolute;
    background: #f4f4f4; /*背景半透明了，为了看到后面的视频*/
    width: 1000px;
    height: 520px;
    margin-top: 10px;
    padding: 80px 80px 120px 80px;
}

#invent1 h3,
#invent2 h3,
#invent3 h3{
    padding:20px;
    font-size:1.6rem;
    line-height: 1.4em;
    font-weight:400;
}

#invent1 input,
#invent2 input{
    font-size: 5rem;
}

#invent1 em,
#invent2 em{
    font-size: 1.4rem;
    font-weight: 400;
    line-height: 2em;
}

#T3{
    font-size: 2rem;
    margin-top:20px;
    margin-left:20px;
    margin-bottom:40px;
}

#answer1, #answer2{
    /*display:none;*/
    /*position:relative;*/
    margin-top: 130px;
    margin-left:10px;
    border-radius: 10px;
    /*border: 2px #333 solid;*/
    background-color: gainsboro;
    width: 400px;
}

#answer1 p,
#answer2 p{
    padding:20px;
    font-weight:300;
    font-size:1.1rem;
    line-height: 1.3em;
}

#index-mainbody-button{
    margin-left: auto;
    margin-right: auto;
    height: 100px;
    width: 30%;
}


.button{
    float:left;
    margin-top: 20px;
    margin-left:20px;
    padding:15px 30px;
    border-radius: 50px;
    background-color: white;
    border: 2px #50D8E3 solid;
    font-size: 1.1rem;
    text-decoration: none;
    color: #50D8E3;
    box-shadow:0 0px 8px 0 rgba(0, 0, 0, 0.2);
}

#btnq3 button{
    margin-top:0;
}

.button:hover{
    color: white;
    background: #50D8E3;
    transition: all .4s;
}

.picture img {
    position:absolute;
    width: 480px;
    height: 270px;
    padding: 10px;
    margin-left:500px;
    margin-top:0px;
}