*{
    margin: 0;
    padding: 0;
}
body{
    justify-content: center;
    align-items: center;
    display: flex;
    min-height: 100vh;
    background-color: black;
}
.alienware{
    width: 300px;
    height: 300px;
    background-color: black;
    transform: rotate(45deg);
    border-radius: 160px 220px 70px 220px;
    box-shadow: 10px 10px 50px 1px white;
    transition: 0.5s;

}
.alienware:hover{
    box-shadow: 10px 10px 60px 20px white;
}
.alienware::before{
    content: '';
    width: 70px;
    height: 70px;
    background-color: white;
    position: absolute;
    top: 200px;
    left: 100px;
    border-top-left-radius: 200px;
    border-bottom-right-radius: 200px;
    transform: rotate(45deg);
    box-shadow: inset 1px 1px 8px 1px black,inset -1px -1px 8px 1px black;
    transition: 0.5s;
}
.alienware:hover::before{
    box-shadow: inset 1px 1px 15px 1px black,inset -1px -1px 15px 1px black;

}
.alienware::after{
    content: '';
    width: 70px;
    height: 70px;
    background-color: white;
    position: absolute;
    top: 100px;
    left: 200px;
    border-top-left-radius: 200px;
    border-bottom-right-radius: 200px;
    box-shadow: inset 1px 1px 8px 1px black,inset -1px -1px 8px 1px black;
    transform: rotate(-45deg);
    transition: 0.5s;
}
.alienware:hover:after{
    box-shadow: inset 1px 1px 15px 1px black,inset -1px -1px 15px black;
}

/* 版权 */
.footer {
    margin-top: 40px;
    padding-top: 30px;
    height: 417px;
    background-color: #fff;
}
 
.footer .left {
    float: left;
}
 
.footer .right {
    float: left;
}