@charset "utf-8";
.menu {
font-family: Tahoma; 
width:720px; 
margin:0; 
margin:0px 0;
}
/* remove the bullets and set the margin and padding to zero for the unordered list */
.menu ul {
padding:0; 
margin:0;
list-style-type: none;
}
/* float the list so that the items are in a line and their position relative so that the drop down list will appear in the right place underneath each list item */
.menu ul li {
float:left; 
position:relative;
z-index:10; /*设置此项防止被其他position:relative层覆盖*/
}
/* style the links to be 104px wide by 30px high with a top and right border 1px solid white. Set the background color and the font size. */
.menu ul li a, .menu ul li a:visited {
display:block; 
text-align:center; 
text-decoration:none; 
width:78px; 
height:30px; 
color:#000; 
/*border-width:1px 1px 0 0;*/
line-height:30px; 
font-size:12px;
}
/* make the dropdown ul invisible */
.menu ul li ul {
display: none;
}

/* specific to non IE browsers */
/* set the background and foreground color of the main menu li on hover */
.menu ul li:hover a {
color:#fff;
background:#7994B3;
background-image:url(../images/menubg_hl.gif);
}
/* make the sub menu ul visible and position it beneath the main menu list item */
.menu ul li:hover ul {
display:block; 
position:absolute; 
top:30px; 
left:0; 
width:120px;
filter:alpha(opacity=85);
opacity:0.85;
}

.menu ul li:hover ul .bottom{
display:block; 
width:120px;
height:12px;
background:url(../images/menu_btmbg.gif) no-repeat; /*菜单底部圆角图*/
filter: alpha(opacity=85);
}

/* style the background and foreground color of the submenu links */
.menu ul li:hover ul li a {
display:block; 
background:#C7E4FA; 
color:#000;
width:120px;
filter: alpha(opacity=85);
}
/* style the background and forground colors of the links on hover */
.menu ul li:hover ul li a:hover {
background:#444; 
color:#fff;
}