使用纯CSS实现圆形导航菜单效果（代码示例）

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废话不多说，直接上代码

css：

body {
    background-color: #262626
}
.demo {
    padding: 2em 0;
    transform: translate3d(0, 0, 0);
}
.navbar {
    width: 150px;
    height: 150px;
    line-height: 150px;
    border-radius: 50%;
    background: #fff;
    margin: 70px auto;
    position: relative;
    cursor: pointer;
    text-align: center;
    font-size: 1.75em;
    font-weight: bold;
    color: #383838;
    transition: 0.24s 0.2s;
}
.navbar:hover {
    background: rgba(255, 255, 255, 0.75);
}
.navbar .menu {
    list-style: none;
    padding: 0;
    margin: 0;
    position: absolute;
    top: -75px;
    left: -75px;
    border: 150px solid transparent;
    cursor: default;
    border-radius: 50%;
    transform: scale(0);
    transition: transform 1.4s 0.07s;
    z-index: -1;
}
.navbar:hover .menu {
    transition: transform 0.4s 0.08s, z-index 0s 0.5s;
    transform: scale(1);
    z-index: 1;
}
.navbar .menu li {
    position: absolute;
    top: -100px;
    left: -100px;
    transform-origin: 100px 100px;
    transition: all 0.5s 0.1s;
}
.navbar:hover .menu li {
    transition: all 0.6s;
}
.navbar .menu li a {
	transition:all .4s ease 0s;
    width: 45px;
    height: 45px;
    line-height: 45px;
    border-radius: 50%;
    background: #fff;
    position: absolute;
    font-size: 60%;
    color: #99b977;
    transition: 0.6s;
    text-decoration: none;
}
.navbar .menu li a:hover {
    background-color: #2860F8;
    color: #fff;
}
.navbar:hover .menu li:nth-child(1) {
    transition-delay: 0.02s;
    transform: rotate(85deg);
}
.navbar:hover .menu li:nth-child(1) a {
    transition-delay: 0.04s;
    transform: rotate(635deg);
}
.navbar:hover .menu li:nth-child(2) {
    transition-delay: 0.04s;
    transform: rotate(125deg);
}
.navbar:hover .menu li:nth-child(2) a {
    transition-delay: 0.08s;
    transform: rotate(595deg);
}
.navbar:hover .menu li:nth-child(3) {
    transition-delay: 0.06s;
    transform: rotate(165deg);
}
.navbar:hover .menu li:nth-child(3) a {
    transition-delay: 0.12s;
    transform: rotate(555deg);
}
.navbar:hover .menu li:nth-child(4) {
    transition-delay: 0.08s;
    transform: rotate(205deg);
}
.navbar:hover .menu li:nth-child(4) a {
    transition-delay: 0.16s;
    transform: rotate(515deg);
}
.navbar:hover .menu li:nth-child(5) {
    transition-delay: 0.1s;
    transform: rotate(245deg);
}
.navbar:hover .menu li:nth-child(5) a {
    transition-delay: 0.2s;
    transform: rotate(475deg);
}
.navbar:hover .menu li:nth-child(6) {
    transition-delay: 0.12s;
    transform: rotate(285deg);
}
.navbar:hover .menu li:nth-child(6) a {
    transition-delay: 0.24s;
    transform: rotate(435deg);
}
.navbar:hover .menu li:nth-child(7) {
    transition-delay: 0.14s;
    transform: rotate(325deg);
}
.navbar:hover .menu li:nth-child(7) a {
    transition-delay: 0.28s;
    transform: rotate(395deg);
}
.navbar:hover .menu li:nth-child(8) {
    transition-delay: 0.16s;
    transform: rotate(365deg);
}
.navbar:hover .menu li:nth-child(8) a {
    transition-delay: 0.32s;
    transform: rotate(355deg);
}
.navbar:hover .menu li:nth-child(9) {
    transition-delay: 0.18s;
    transform: rotate(405deg);
}
.navbar:hover .menu li:nth-child(9) a {
    transition-delay: 0.36s;
    transform: rotate(315deg);
}

html：

<div class="demo">
	  <div class="container">
	<div class="row">
		  <div class="col-md-12">
			<div class="navbar">主菜单
				  <ul class="menu">
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-facebook"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-google-plus"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-twitter"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-linkedin"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-pinterest"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-rss"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-instagram"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-skype"></a></li>
				<li><a href="https://www.17sucai.com/preview/1424582/2019-10-15/cy/index.html#" class="fa fa-github"></a></li>
			  </ul>
				</div>
		  </div>
		</div>
  </div>
</div>

效果图：

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