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<title>纯CSS飞出的纵向菜单</title>
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#menu {list-style-type:none; margin:0 auto 50px auto; padding:0; width:302px;}
#menu li {padding:0; margin:0; position:relative; width:150px; height:1.7em; z-index:100;}
#menu li dl {position:absolute; top:0; left:0; padding-bottom:0;}
#menu li a, #menu li a:visited {text-decoration:none;}
#menu li dd {display:none;}
#menu table {border-collapse:collapse; padding:0; margin:-1px; font-size:1em;}
#menu dl {width: 150px; margin: 0; padding: 0; background: transparent;}
#menu dt {margin:0; padding: 0;}
#menu dd {margin:0; padding:0; color: #fff; font-size: 1em; text-align:left; width:150px; float:right; clear:right;}
#menu dt a, #menu dt a:visited {display:block; font-size: 0.9em; color: #c00; text-align:center; border:1px solid #c00; border-width:0 1px 1px 1px; background:#d4d4d4; padding:0.25em 0 0.75em 0;}
#menu li a:hover {border:0;}
#menu li:hover dd, #menu li a:hover dd {display:block;}
#menu li:hover dl, #menu li a:hover dl {width:301px;}
#menu li:hover dt a, #menu a:hover dt a {color:#000; background:#ddd; border:1px solid #c00; border-width:0 1px 1px 1px;}
#menu dd a, #menu dd a:visited {background:#c00; color:#fff; padding:0.5em 0; text-decoration:none; display:block; text-align:center; border-left:1px solid #c00; border-right:1px solid #c00; width:148px;}
#menu dd a:hover {background: #ddd; color:#000; border-left:1px solid #c00; border-right:1px solid #c00;}
#menu b {display:block; overflow:hidden; height:1px;}
b.p1 {background:#c00; margin:0 5px;}
b.p2 {background:#d4d4d4; border:2px solid #c00; border-width:0 2px; margin:0 3px;}
b.p3 {background:#d4d4d4; margin:0 2px; border:1px solid #c00; border-width:0 1px;}
b.p4 {height:2px; background:#d4d4d4; margin:0 1px; border:1px solid #c00; border-width:0 1px;}
b.p5 {background:#c00; margin:0 5px;}
b.p6 {background:#c00; margin:0 3px;}
b.p7 {background:#c00; margin:0 2px;}
b.p8 {height:2px; background:#c00; margin:0 1px;}
#menu li:hover b.p2, #menu a:hover b.p2 {background:#fff;}
#menu li:hover b.p3, #menu a:hover b.p3 {background:#f0f0f0;}
#menu li:hover b.p4, #menu a:hover b.p4 {background:#e8e8e8;}
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