之前为大家介绍了好几款导航菜单，今天为给大家再带来一款纯css3实现的动画加载导航。该导航出现的时候以动画的形式出现。效果图如下：
实现的代码。
html代码：
<ul class="main-menu">
<li class="main-menu-item active"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li><li class="main-menu-item">
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >About Us</a></li><li class="main-menu-item"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Another Link</a></li><li
class="main-menu-item"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >And another</a></li><li class="main-menu-item"><a
href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Stuff</a></li><li class="main-menu-item"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Help</a></li><li class="main-menu-item">
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Contact</a></li></ul>
css代码：
*, *:after, *:before {
-moz-box-sizing: border-box;
box-sizing: border-box;
margin:;
padding:;
}html, body {
background: #f0f0f0;
font-family: Helvetica, sans-serif;
height: 100%;
}.main-menu {
margin: auto;
width: 960px;
text-align: center;
position: relative;
list-style-type: none;
margin-top: 2em;
}.main-menu::after,
.main-menu-item.active::after {
content: '';
display: inline-block;
position: absolute;
}.main-menu::after {
width: 70%;
height: 2px;
background: #9B1C27;
-webkit-animation: menuLine 1s ease forwards;
animation: menuLine 1s ease forwards;
-webkit-transform: scaleX(0);
-ms-transform: scaleX(0);
transform: scaleX(0);
bottom:;
left:;
right:;
margin: auto;
opacity:;
}@-webkit-keyframes menuLine {
to {
-webkit-transform: scaleX(1);
transform: scaleX(1);
opacity:;
}
}@keyframes menuLine {
to {
-webkit-transform: scaleX(1);
transform: scaleX(1);
opacity:;
}
}
@-webkit-keyframes menuItem {
to {
-webkit-transform: translateY(0);
transform: translateY(0);
opacity:;
}
}
@keyframes menuItem {
to {
-webkit-transform: translateY(0);
transform: translateY(0);
opacity:;
}
}
.main-menu-item a {
display: block;
padding: 1em;
text-decoration: none;
color: #555;
opacity:;
-webkit-transform: translateY(40%);
-ms-transform: translateY(40%);
transform: translateY(40%);
-webkit-animation: menuItem .8s ease forwards;
animation: menuItem .8s ease forwards;
-webkit-transition: all .2s ease;
transition: all .2s ease;
}
.main-menu-item:nth-child(4) a {
-webkit-animation-delay: .4s;
animation-delay: .4s;
}
.main-menu-item:nth-child(3) a, .main-menu-item:nth-child(5) a {
-webkit-animation-delay: .5s;
animation-delay: .5s;
}
.main-menu-item:nth-child(2) a, .main-menu-item:nth-child(6) a {
-webkit-animation-delay: .6s;
animation-delay: .6s;
}
.main-menu-item:nth-child(1) a, .main-menu-item:nth-child(7) a {
-webkit-animation-delay: .7s;
animation-delay: .7s;
}.main-menu-item {
display: inline-block;
position: relative;
}
.main-menu-item:hover a, .main-menu-item.active {
color: #9B1C27;
}
.main-menu-item:hover a::after, .main-menu-item.active::after {
width:;
height:;
border-bottom: .5em solid #9B1C27;
border-left: .5em solid transparent;
border-right: .5em solid transparent;
bottom:;
left:;
right:;
margin: auto;
opacity:;
-webkit-transform: translateY(0.05em);
-ms-transform: translateY(0.05em);
transform: translateY(0.05em);
-webkit-animation: menuItem .8s 1.2s ease forwards;
animation: menuItem .8s 1.2s ease forwards;
}
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