简单好用的二级导航

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>超简洁CSS抽屉式下拉菜单代码</title>
<link href="css/lrtk.css" rel="stylesheet" type="text/css" />
</head>
<body>
<!-- 代码 开始 -->
<h1>超简洁CSS抽屉式下拉菜单代码</h1>
<nav class="nav">
  <ul class="nav_menu">
    <li class="nav_menu-item"><a href="http://www.lanrentuku.com/" target="_blank">Home</a></li>
    <li class="nav_menu-item"><a href="http://www.lanrentuku.com/" target="_blank">Services</a>
      <ul class="nav_submenu">
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Web Design</a></li>
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Web Development</a></li>
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Web Hosting</a></li>
      </ul>
    </li>
    <li class="nav_menu-item"><a href="http://www.lanrentuku.com/" target="_blank">About</a>
      <ul class="nav_submenu">
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Our Company</a></li>
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Our Xixi</a></li>
        <li class="nav_submenu-item"> <a href="http://www.lanrentuku.com/" target="_blank">Our Reach</a></li>
      </ul>
    </li>
    <li class="nav_menu-item"><a href="http://www.lanrentuku.com/" target="_blank">Blog</a></li>
    <li class="nav_menu-item"><a href="http://www.lanrentuku.com/" target="_blank">Contact</a></li>
  </ul>
</nav>
<!-- 代码 结束 -->
</body>
</html>

css

/* ÀÁÈËÍ¼¿â ËÑ¼¯ÕûÀí www.lanrentuku.com */

html {
  -moz-box-sizing: border-box;
       box-sizing: border-box;
}
a,a:hover{color:#FFF;text-decoration:none}

*, *:before, *:after {
  -moz-box-sizing: border-box;
       box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  background: #27ae60;
}

nav ul {
  list-style: none;
  padding-left: 0;
  margin-top: 0;
  margin-bottom: 0;
}

h1 {
  width: 500px;
  margin: 100px auto 20px;
  color: #f0f0f0;
  text-align: center;
}

.nav {
  width: 500px;
  margin: 0 auto;
  background: #1e8449;
  color: #f0f0f0;
}
.nav a {
  display: block;
  padding: 0 16px;
  line-height: inherit;
  cursor: pointer;
}
.nav_menu {
  line-height: 45px;
  font-weight: 700;
  text-transform: uppercase;
}
.nav_menu-item {
  display: inline-block;
  position: relative;
}
.nav_menu-item:hover {
  background-color: #9b59b6;
}
.nav_menu-item:hover .nav_submenu {
  display: block;
}
.nav_submenu {
  font-weight: 300;
  text-transform: none;
  display: none;
  position: absolute;
  width: 220px;
  background-color: #9b59b6;
}
.nav_submenu-item:hover {
  background: rgba(0, 0, 0, 0.1);
}

简单好用的二级导航

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