main{
    padding-left: 5%;
    padding-right: 5%;
}
#topimg{
    width: 100%;
    height: 720px;
    background-image: url("../img/tree4.jpg");
    background-size: cover;
    background-attachment: fixed;
}
#topimg div{
    width: 50%;
    margin: 0 auto;
    animation-name: title;
    animation-timing-function: ease;
    animation-duration: 1.5s;
}
#topimg div img{
    width: 100%;
}
#topimg p{
    margin: 0 auto;
    text-align: center;
    font-weight: bold;
    font-family: Calibri;
    font-size: 10vw;
    color: #ffffff;
    animation-name: title;
    animation-timing-function: ease;
    animation-duration: 1.5s;
}
@keyframes title{
    from{
        opacity: 0;
    }
    to{
        opacity: 1;
    }
}
#start{
    margin-top: 100px;
}
#start a p{
    background-color: #ffffff;
    transition-duration: .2s;
}
#start p:hover{
    background-color: #ff8a1d;
}
article{
    background-color: transparent;
    border: transparent; 
}

/* #whole{
    display: flex;
}
main{
    width: 80%;
}
aside{
    margin-top: 80px;
    margin-right: 50px;
    width: 20%;
    display: block;
} */
article #twitter{
    height: 600px;
    overflow: scroll;
    background-color: #ffffff;
    
}
#contents{
    padding-left: 10%;
    padding-right: 10%;
    margin-top: 20px;
}
#contents div{
    display: flex;
    margin-bottom: 20px;
    position: relative;
}
@media screen and (max-width: 960px) {
    #contents div{
        margin-bottom: 20px;
    }
    #contents div{
        margin-bottom: 60px;
    }
}
@media screen and (max-width: 800px) {
    #contents div .heading{
        display: block;
    }
    #contents div .heading{
        display: none;
    }
}
#contents div .number{
    position: absolute;
    left: 35%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 7vw;
}
#contents div .heading{
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 50%;
}
#contents div .heading_title{
    position: absolute;
    top: 0;
    left: 35%;
    font-size: 2.5vw;
    font-weight: bold;
}
#contents div img{
    width: 30%
}
#contents div .link{
    position: absolute;
    bottom: 0;
    left: 100%;
    margin: 0;
    background-color: #ffffff;
    width: 80px;
    height: 80px;
    border-radius: 40px;
    padding: 0;
    transition-duration: .2s;
}
#contents div.link:hover{
    background-color: #ff8a1d;
}
#contents div .link p{
    font-weight: bold;
    font-size: 15px;
    line-height: 80px;
    margin: 0 auto;
}
#contents div .link p a{
    text-decoration: none;
    color: #000000;
}
.language{
    transition-duration: .2s;
    background-color: #ffffff;
}
.language:hover{
    background-color: #ff8a1d;
}