Demo:http://demo.ourtuts.com/menu/index.html
Html:
HTML5 / CSS3 Drop-Down Navigation Menu
/* css reset - makes the layout looking good in all browsers */
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline; }
article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
display: block; }
body {
line-height: 1;
font:12px/20px Arial;
background:#e0f3ff url(bg.png) repeat scroll 0 0;
}
ol, ul {
list-style: none;
}
/* Main Styles */
#nav {
position:relative;
width:620px;
margin:0 auto;
}
ul#navigation {
margin:0px auto;
position:relative;
float:left;
border-left:1px solid #c4dbe7;
border-right:1px solid #c4dbe7;
}
ul#navigation li {
display:inline;
font-size:12px;
font-weight:bold;
margin:0;
padding:0;
float:left;
position:relative;
border-top:1px solid #c4dbe7;
border-bottom:2px solid #c4dbe7;
}
ul#navigation li a {
padding:10px 25px;
color:#616161;
text-shadow:1px 1px 0px #fff;
text-decoration:none;
display:inline-block;
border-right:1px solid #fff;
border-left:1px solid #C2C2C2;
border-top:1px solid #fff;
background: #f5f5f5;
-webkit-transition:color 0.2s linear, background 0.2s linear;
-moz-transition:color 0.2s linear, background 0.2s linear;
-o-transition:color 0.2s linear, background 0.2s linear;
transition:color 0.2s linear, background 0.2s linear;
}
ul#navigation li a:hover {
background:#f8f8f8;
color:#282828;
}
ul#navigation li:hover > a {
background:#fff;
}
/* Drop-Down Navigation */
ul#navigation li:hover > ul
{
visibility:visible;
opacity:1;
}
ul#navigation ul, ul#navigation ul li ul {
list-style: none;
margin: 0;
padding: 0;
visibility:hidden;
position: absolute;
z-index: 99999;
width:180px;
background:#f8f8f8;
box-shadow:1px 1px 3px #ccc;
opacity:0;
-webkit-transition:opacity 0.2s linear, visibility 0.2s linear;
-moz-transition:opacity 0.2s linear, visibility 0.2s linear;
-o-transition:opacity 0.2s linear, visibility 0.2s linear;
transition:opacity 0.2s linear, visibility 0.2s linear;
}
ul#navigation ul {
top: 43px;
left: 1px;
}
ul#navigation ul li ul {
top: 0;
left: 181px;
}
ul#navigation ul li {
clear:both;
width:100%;
border:0 none;
border-bottom:1px solid #c9c9c9;
}
ul#navigation ul li a {
background:none;
padding:7px 15px;
color:#616161;
text-shadow:1px 1px 0px #fff;
text-decoration:none;
display:inline-block;
border:0 none;
float:left;
clear:both;
width:150px;
}
ul#navigation li a.first {
border-left: 0 none;
}
ul#navigation li a.last {
border-right: 0 none;
} 
