* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    background-image: linear-gradient(45deg, deepskyblue, deeppink);
}

body,
.container,
.open,
.item {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
}

.container {
    position: relative;
    width: 80px;
    height: 80px;
}

.container::after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    top: -60px;
    left: -60px;
    z-index: 1;
}

.container:hover::after {
    width: 200px;
    height: 200px;
}

.container:hover .iconfont {
    transform: rotate(315deg);
}

.container:hover .list .item {
    left: -40px;
    transform: rotate(calc(45deg * var(--i)));
}

.container .open,
.container .item {
    background: #fff;
    border-radius: 50%;
}

.container .open {
    width: 80px;
    height: 80px;
    cursor: pointer;
    z-index: 3;
}

.container .open .iconfont {
    font-size: 40px;
    transition: 0.5s;
}

.container .item {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    transform: rotate(0deg);
    transform-origin: 100px;
    transition-delay: calc(0.01s * var(--i));
    transition-duration: 0.5s;
    z-index: 2;
}

.container .item .link {
    transform: rotate(calc(-45deg * var(--i)));
}

.container .item .iconfont {
    font-size: 20px;
}