#about_top{
    text-align: center;
    color:white;
    font-size: 22px;
}
#about_top a{
    color:white;
}
.member{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    text-align: center;
}
.member div span{
    color:rgb(46, 46, 46);
    font-size: 30px;
    z-index: 100;
}
.member div{
    margin: 10px 0;
    width:466px;
    height:648px;
    background-size: cover;
    background-repeat: no-repeat;
}
#member_list{
    background-image: url("../image/memberlist.png");
}
#participate_list{
    background-image: url("../image/participate_member.png");
}
#top_br_2{
    height:510px;
}
#participate_more{
    height:10px;
    font-size: large;
}
#about_bottom{
    color:rgba(167, 167, 167, 0.8);
    font-size: small;
    text-align: center;
}
@media only screen and (max-width: 768px){
    #about_top{
        font-size: 15px;
    }
    .member div{
        width:233px;
        height:324px;
    }
    .member div span{
        font-size: 15px;
    }
    #top_br_2{
        height:250px;
    }
}