藤藤每日一练——CSS3 Ribbon Menu

这个效果是一个类似于彩带的导航菜单效果，整个效果之中，使用的方法都比较简单，关键之处就是如何实现导航菜单两边折角的效果。常用的方法就是“:after”和“:before”生成折角部分，如果你以前从没接触过这种彩带效果制作，不仿先看看《Pure CSS3 Ribbons》以及《CSS3 Ribbons》、《CSS制作图形速查表》、《纯CSS制作的图形效果》几篇教程，能更好的帮助你学习这个案例的制作原理与方法。不过本案例中有一个最不好的地方，就是定死了菜单项的宽度，不能做到收缩自如，所以您要是有兴趣可以在此基础上进行改良。与我们分享。

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HTML Code

<nav id="nav">
  <ul class="clearfix">
    <li> </li>
    <li><a href="#" class="active">W3cplus</a></li>
    <li><a href="#">CSS3</a></li>
    <li><a href="#">Demo</a></li>
    <li><a href="#">Resources</a></li>
    <li><a href="#">Rnippet</a></li>
    <li><a href="#">Tutorial</a></li>
    <li><a href="#">Blog</a></li>
    <li> </li>
  </ul>
</nav>

CSS CODE

body {
  background-color: #8e949f;
}

#nav {
  width: 780px;
  height: 85px;
  padding-top: 50px;
  margin: 40px auto;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0,0,0,.2),0 0 10px rgba(0,0,0,.1) inset;
  background-color: #eeeeee;
}
#nav ul {
  position: relative;
  width: 800px;
  height: 40px;
  line-height: 40px;
  padding: 1px;
  margin-left: -10px;
  border-radius: 3px;
  background-color: #26211a;
}
#nav ul:before,
#nav ul:after {
  display: inline-block;
  position: absolute;
  border-style: solid;
  border-width: 6px;
  z-index: -1;
}
#nav ul:before {
  top: -10px;
  left: 0px;
  border-color: transparent #221712 #221712 transparent;
}
#nav ul:after {
  top: -8px;
  right: 0;
  border-color: transparent transparent #221712 #221712;
}
#nav li {
  float: left;
  font-weight: bold;
  text-shadow: 0 1px 2px rgba(0,0,0,.2);
  text-align: center;
  width: 104px;
  margin-right: 1px;
  box-shadow: 0 0 0 1px rgba(97,97,97,1) inset;
  background-image: -webkit-linear-gradient(top,#4b4b4b,#262626);
  background-image: -moz-linear-gradient(top,#4b4b4b,#262626);
  background-image: -o-linear-gradient(top,#4b4b4b,#262626);
  background-image: -ms-linear-gradient(top,#4b4b4b,#262626);
  background-image: linear-gradient(top,#4b4b4b,#262626);
}
#nav li:first-child {
  position: relative;
  width: 54px;
  border-radius: 3px 0 0 3px;
}
#nav li:first-child:after {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -10px;
  display: block;
  font-family: 'icomoon';
  speak: none;
  font-weight: normal;
  -webkit-font-smoothing: antialiased;
  content: "\22";
  color: #121212;
  text-shadow: 0 -1px 0 #0e0e0e,0 1px 0 #3a3a3a;
  font-size: 16px;
}
#nav li:last-child {
  width: 10px;
  margin-right: 0;
  border-radius: 0 3px 3px 0;
}
#nav li a {
  color: #fff;
  display: block;
}
#nav li a:hover {
  text-decoration: none;
  box-shadow: 0 0 0 1px rgba(200,125,25,1) inset;
  background-image: -webkit-linear-gradient(top,#a65a12,#7e3106);
  background-image: -moz-linear-gradient(top,#a65a12,#7e3106);
  background-image: -o-linear-gradient(top,#a65a12,#7e3106);
  background-image: -ms-linear-gradient(top,#a65a12,#7e3106);
  background-image: linear-gradient(top,#a65a12,#7e3106);
}
#nav li a:active,
#nav li a.active {
  color: #e6c35c;
  box-shadow: 0 0 0 1px rgba(92,92,92,.8) inset;
  background-image: -webkit-linear-gradient(top,#070707,#252525);
  background-image: -moz-linear-gradient(top,#070707,#252525);
  background-image: -o-linear-gradient(top,#070707,#252525);
  background-image: -ms-linear-gradient(top,#070707,#252525);
  background-image: linear-gradient(top,#070707,#252525);
}
@font-face {
  font-family: 'icomoon';
  src:url('fonts/icomoon.eot');
  src:url('fonts/icomoon.eot?#iefix') format('embedded-opentype'),
 	url('fonts/icomoon.svg#icomoon') format('svg'),
	url('fonts/icomoon.woff') format('woff'),
	url('fonts/icomoon.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

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