以下是 纯CSS3制作蓝色滑动下拉菜单特效代码 的示例演示效果:
部分效果截图:

HTML代码(index.html):
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>纯CSS3制作蓝色滑动下拉菜单</title>
<style  type="text/css">
body{
	margin:0;
	font-family:'微软雅黑','Times New Roman', Times, serif;
	}
.navi_head{
	height:50px;
	background-color:#459df5;
}
.navi_body{
	overflow:hidden;
	height:50px;
	background:rgba(36,97,158,0.9);
	transition:height ease 0.5s;
}
.navi_body:hover{
	height:300px;
}
.navi_head>div>span{
	width:150px;
	text-align:center;
	height:300px;
	display:inline-block;
	font-weight:bold;
	color:#FFF;
	font-size:14px;
	vertical-align:top;
}
.navi_head>div>span>p a{
	color:#FFF;
	text-decoration:none;
}
.navi_head>div>span>p a:hover{
	color:#FFF;
	text-decoration:underline;
}
.navi_title{
	font-size:16px;
	line-height:50px;
	margin-top:0;
}
.navi_head>div>span:hover{
	background:rgba(100,100,100,0.2);
}
</style>
</head>
<body>
<div>
	<div class="navi_body">
		<div class="navi_head">
			<div style="width:80%; margin-left:auto; margin-right:auto;">
				<span>
					<p class="navi_title">首页</p>
				</span>
				<span>
					<p class="navi_title">关于我们</p>
					<p><a href="">团队介绍</a></p>
					<p><a href="">服务QQ群</a></p>
					<p><a href="">个人业务</a></p>
				</span>
				<span>
					<p class="navi_title">软件下载</p>
					<p><a href="">WEB编译工具</a></p>
					<p><a href="">桌面整理工具</a></p>
				</span>
				<span>
					<p class="navi_title">招贤纳士</p>
					<p><a href="">WEB前端工程师</a></p>
					<p><a href="">JAVAWEB工程师</a></p>
					<p><a href="">APP开发工程师</a></p>
					<p><a href="">数据库工程师</a></p>
					<p><a href="">软件架构师</a></p>
					<p><a href="">技术客服</a></p>
				</span>
				<span>
					<p class="navi_title">给我留言</p>
					<p><a href="">站内留言</a></p>
					<p><a href="">站长信箱</a></p>
				</span>
			</div>
		</div>
	</div>
</div>
</body>
</html>
 
             
        