屌炸天-css3水平导航下拉菜单
1. 简介
参考：http://designmodo.com/css3-dropdown-menu/
本人重新定义了css的样式， 得到了适合自己的css文件
2. 原css文件
style.css
/*
HOW TO CREATE A CSS3 DROPDOWN MENU [TUTORIAL]
"How to create a CSS3 Dropdown Menu [Tutorial]" was specially made for DesignModo by our friend Valeriu Timbuc.
Links:
http://vtimbuc.net/
https://twitter.com/vtimbuc
http://designmodo.com
http://vladimirkudinov.com
*/
/* Reset */
.menu,
.menu ul,
.menu li,
.menu a {
margin: 0;
padding: 0;
border: none;
outline: none;
}
/* Menu */
.menu {
height: 40px;
width: 505px;
background: #4c4e5a;
background: -webkit-linear-gradient(top, #4c4e5a 0%,#2c2d33 100%);
background: -moz-linear-gradient(top, #4c4e5a 0%,#2c2d33 100%);
background: -o-linear-gradient(top, #4c4e5a 0%,#2c2d33 100%);
background: -ms-linear-gradient(top, #4c4e5a 0%,#2c2d33 100%);
background: linear-gradient(top, #4c4e5a 0%,#2c2d33 100%);
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
.menu li {
position: relative;
list-style: none;
float: left;
display: block;
height: 40px;
}
/* Links */
.menu li a {
display: block;
padding: 0 14px;
margin: 6px 0;
line-height: 28px;
text-decoration: none;
border-left: 1px solid #393942;
border-right: 1px solid #4f5058;
font-family: Helvetica, Arial, sans-serif;
font-weight: bold;
font-size: 13px;
color: #f3f3f3;
text-shadow: 1px 1px 1px rgba(0,0,0,.6);
-webkit-transition: color .2s ease-in-out;
-moz-transition: color .2s ease-in-out;
-o-transition: color .2s ease-in-out;
-ms-transition: color .2s ease-in-out;
transition: color .2s ease-in-out;
}
.menu li:first-child a { border-left: none; }
.menu li:last-child a{ border-right: none; }
.menu li:hover > a { color: #8fde62; }
/* Sub Menu */
.menu ul {
position: absolute;
top: 40px;
left: 0;
opacity: 0;
background: #1f2024;
-webkit-border-radius: 0 0 5px 5px;
-moz-border-radius: 0 0 5px 5px;
border-radius: 0 0 5px 5px;
-webkit-transition: opacity .25s ease .1s;
-moz-transition: opacity .25s ease .1s;
-o-transition: opacity .25s ease .1s;
-ms-transition: opacity .25s ease .1s;
transition: opacity .25s ease .1s;
}
.menu li:hover > ul { opacity: 1; }
.menu ul li {
height: 0;
overflow: hidden;
padding: 0;
-webkit-transition: height .25s ease .1s;
-moz-transition: height .25s ease .1s;
-o-transition: height .25s ease .1s;
-ms-transition: height .25s ease .1s;
transition: height .25s ease .1s;
}
.menu li:hover > ul li {
height: 36px;
overflow: visible;
padding: 0;
}
.menu ul li a {
width: 100px;
padding: 4px 0 4px 40px;
margin: 0;
border: none;
border-bottom: 1px solid #353539;
}
.menu ul li:last-child a { border: none; }
/* Icons */
.menu a.documents { background: url(../img/docs.png) no-repeat 6px center; }
.menu a.messages { background: url(../img/bubble.png) no-repeat 6px center; }
.menu a.signout { background: url(../img/arrow.png) no-repeat 6px center; }3. 自定义适合自己的css样式
css3-dropdown-menu.css
为保证能正常显示子li元素， 故在
.css3-dropdown-menu, .css3-dropdown-menu ul, .css3-dropdown-menu li, .css3-dropdown-menu a
里添加了一个z-index: 99;
效果如下图：
/*
HOW TO CREATE A CSS3 DROPDOWN css3-dropdown-menu [TUTORIAL]
"How to create a CSS3 Dropdown css3-dropdown-menu [Tutorial]" was specially made for DesignModo by our friend Valeriu Timbuc.
Links:
http://vtimbuc.net/
https://twitter.com/vtimbuc
http://designmodo.com
http://vladimirkudinov.com
*/
/* 原文链接：http://designmodo.com/css3-dropdown-menu/ */
/* 重置 */
.css3-dropdown-menu, .css3-dropdown-menu ul, .css3-dropdown-menu li,
.css3-dropdown-menu a {
margin: 0;
padding: 0;
border: none;
outline: none;
z-index: 99;
}
/* css3-dropdown-menu */
.css3-dropdown-menu {
height: 50px;
/* width: 505px; */
min-width: 700px;
width: 900px;
background: #4c4e5a;
background: -webkit-linear-gradient(top, #4c4e5a 0%, #2c2d33 100%);
background: -moz-linear-gradient(top, #4c4e5a 0%, #2c2d33 100%);
background: -o-linear-gradient(top, #4c4e5a 0%, #2c2d33 100%);
background: -ms-linear-gradient(top, #4c4e5a 0%, #2c2d33 100%);
background: linear-gradient(top, #4c4e5a 0%, #2c2d33 100%);
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
.css3-dropdown-menu li {
position: relative;
list-style: none;
float: left;
display: block;
height: 50px;
}
/* Links */
.css3-dropdown-menu li a {
display: block;
padding: 0 25px;
margin: 6px 0;
line-height: 36px;
text-decoration: none;
border-left: 1px solid #393942;
border-right: 1px solid #4f5058;
font-family: Helvetica, Arial, sans-serif;
font-weight: bold;
font-size: 15px;
color: #f3f3f3;
text-shadow: 1px 1px 1px rgba(0, 0, 0, .6);
-webkit-transition: color .2s ease-in-out;
-moz-transition: color .2s ease-in-out;
-o-transition: color .2s ease-in-out;
-ms-transition: color .2s ease-in-out;
transition: color .2s ease-in-out;
}
.css3-dropdown-menu li:first-child a {
border-left: none;
}
.css3-dropdown-menu li:last-child a {
border-right: none;
}
.css3-dropdown-menu li:hover>a {
color: #8fde62;
}
/* Sub css3-dropdown-menu */
.css3-dropdown-menu ul {
position: absolute;
top: 50px;
left: 0;
opacity: 0;
background: #1f2024;
-webkit-border-radius: 0 0 5px 5px;
-moz-border-radius: 0 0 5px 5px;
border-radius: 0 0 5px 5px;
-webkit-transition: opacity .25s ease .1s;
-moz-transition: opacity .25s ease .1s;
-o-transition: opacity .25s ease .1s;
-ms-transition: opacity .25s ease .1s;
transition: opacity .25s ease .1s;
}
.css3-dropdown-menu li:hover>ul {
opacity: 1;
}
.css3-dropdown-menu ul li {
height: 0;
overflow: hidden;
padding: 0;
-webkit-transition: height .25s ease .1s;
-moz-transition: height .25s ease .1s;
-o-transition: height .25s ease .1s;
-ms-transition: height .25s ease .1s;
transition: height .25s ease .1s;
}
.css3-dropdown-menu li:hover>ul li {
height: 40px; /* 子li元素高度 */
overflow: visible;
padding: 0;
}
.css3-dropdown-menu ul li a {
width: 150px;
line-height: 32px; /* 行高 = 子li元素高度 - padding-top - padding-bottom, 此处： 32px = 40px - 4px -4px */
padding: 4px 10px 4px 10px; /* 可知, padding-top:4px, padding-bottom:4px */
margin: 0;
border: none;
font-size: 13px;
border-bottom: 1px solid #353539;
}
.css3-dropdown-menu ul li:last-child a {
border: none;
}4. html/jsp文件
index.html
强大的CSS3下拉菜单
5. 预览效果
导航菜单总长度为505px， 可自行加长；导航高度为50px, 父li元素高度为50px, 子li元素为40px. 子li元素内， 行高 = 子li元素高度 - padding-top - padding-bottom, 此处： 32px = 40px - 4px -4px, 还设置了导航条min-width: 700px; 可根据自己喜欢自行修改.