@charset "utf-8";
.mid{
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.joinpart{
    width: 1200px;
    height: 650px;
    margin: auto;
    display: flex;
    justify-content: center;
    background-image: url("../image/join.jpg");
    background-repeat: no-repeat;
    background-size: 1300px;
    overflow: hidden;
    opacity: 0.9;
    border-radius: 50px;
    animation: loadbac 1s linear;
    transition: 1s ease 0.2s;
}

.joinpart .left{
    width: 400px;
    height: 100%;
}

.joinpart .left .square{
    width: 250px;
    height: 250px;
    border: 5px solid rgb(183, 207, 226);
    margin: auto;
    margin-top: 200px;
    border-radius: 30%;
    animation: a1 3s infinite linear;
}
.left .square::before{
    content: "";
    width: 250px;
    height: 250px;
    transform: rotate(30deg);
    border: 5px solid rgb(183, 207, 226);
    border-radius: 40%;
    position: absolute;
    animation: a2 25s infinite linear;
}

.left .square::after{
    content: "";
    width: 250px;
    height: 250px;
    transform: rotate(60deg);
    border: 5px solid rgb(183, 207, 226);
    border-radius: 30%;
    position: absolute;
    animation: a2 60s infinite linear;
}

.left .tit{
    position: absolute;
    font-size: 2em;
    margin-left: 130px;
    margin-top: -170px;
    color: rgb(183, 207, 226);
    z-index: -10;
}

.left .square:hover{
    animation: a1 15s infinite linear;
}
.left .square:hover::before{
    animation: a2 80s infinite linear;
}
.left .square:hover::after{
    animation: a1 50s infinite linear;
}

.joinpart .right{
    width: 800px;
    height: 100%;
}
.joinpart .goal{
    color: rgb(206, 228, 238);
    width: 500px;
    margin: auto;
    display: flex;
    flex-direction: column;
}
.joinpart .goal h1{
    font-size: 4em;
    font-weight: bolder;
    line-height: 200px;
}

.joinpart .goal p{
    word-wrap: break-word;
}
.meth{
    width: 500px;
    height: 100px;
    flex-direction: row;
    display: flex;
    justify-content: space-around;
    margin-top: 50px;
}

.meth .icon{
    width: 30px;
    height: 30px;
    background-size: cover;
    border-radius: 5px;
    background-repeat: no-repeat;
    background-position: center;
    transition: 0.4s ease 0s;
}
.meth .icon:hover{
    transform: scale(1.1);
    cursor: pointer;
}
.meth .qq{
    background-image: url("../image/qq.png");
    background-size: 25px;
}
.meth .vx{
    background-image: url("../image/vx.png");
}
.meth .bili{
    background-image: url("../image/bili.png");
    background-color: rgb(245, 128, 147);
}
.meth .gh{
    background-image: url("../image/github.png");
    background-size: 40px;
}

.icon ul{
    display: none;
    list-style: none;
    margin-top: 30px;
    width: 150px;
    margin-left: -80px;
    color: white;
    font-size: 14px;
}
.icon:hover ul{
    display: block;
    position: absolute;
}


@keyframes a1{
    to{
        transform: rotate(360deg);
    }
}
@keyframes a2{
    to{
        transform: rotate(-10800deg
        );
    }
}
@keyframes loadbac{
    0%{
        opacity: 0;
        margin-top: 100px;
    }
    100%{
        opacity: 1;
        margin-top: 50px;
    }
}