*{padding:0; margin:0;}
.bg {
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.8;
}
ul, ol, li, dl {
    list-style-type: none;
}

.bottom_box {
    width: 100%;
    display: -webkit-box;
    display: -moz-box;
    -webkit-box-orient: horizontal;
    -moz-box-orient: horizontal;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    z-index:90001
}
.bottom_box > * {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
}
.nav4{
    height:33px;
}
.nav4 ul{
    position:fixed;
    z-index:90200;
    bottom:0;
    left:0;
    width:100%
}
.nav4 li{
    border-left:1px solid #CCC;
    border-top:1px solod #000;
    height:33px;
    position:relative;
    -webkit-box-shadow:inset 0 0 3px #fff;
    float:left;
    width:33.26%;
    
}
.nav4 li:nth-of-type(1){border-left;0;}
.nav4 li>a{
    font-size:15px;
    -webkit-box-sizing:border-box;
    box-sizing:border-box;
    /*border:1px solid #f9f8f9;*/
    -webkit-tap-highlight-color:rgba(0,0,0,0);
    border-bottom:0;
    display:block;
    line-height:33px;
    text-align:center;
    background:-webkit-gradient(linear, 0 0, 0 100%, from(#f1f1f1), to(#dcdcdc), color-stop(35% ,#ededed), color-stop(50%, #e3e3e3) );
}
.nav4 li>a:only-child span{
    background:none;
    padding-left:0;
}
.nav4 li>a.on + dl{
    display: block;
}
.nav4 li>a span{
    color: #4f4d4f;
    display: inline-block;
    padding-left: 15px;
    background: url(1.svg#2) no-repeat 4px 12px;
    -webkit-background-size: 9px auto;
    text-shadow:0px 1px 0px #ffffff;
}
/***********************/
.nav4 dl{
    display:none;
    position:absolute;
    z-index:220;
    bottom:45px;
    left:50%;
    width:100px;
    margin-left:-50px;
    background:red;
    /*min-height:100px;*/
    background:#e4e3e2;
    /*border:1px solid #afaeaf;*/
    border-radius:5px;
    -webkit-box-shadow:inset 0 0 3px #fff;
    background:url(2.svg#3) no-repeat center center;
    -webkit-background-size:100%;
    background-size:100%;
}
/*, .nav4 dl:after*/
.nav4 dl:before{
    content:"";
    display:inline-block;
    position:absolute;
    z-index:240;
    bottom:0;
    left:50%;
    /*width:0;
     height:0;
     border:8px solid red;
     border-color:#afaeaf transparent transparent transparent;
     margin-left:-8px;
     margin-bottom:-16px;*/
    width:10px;
    height:8px;
    background: url(1.svg#2) no-repeat center -55px;
    -webkit-background-size: 10px auto;
    bottom: -7px;
    margin-left: -5px;
}
/*.nav4 dl:after{
	z-index:241;
	border-color:#e4e3e2 transparent transparent transparent;
	margin-bottom:-15px;
 }*/
.nav4 dl dd{
    line-height:45px;
    text-align:center;
    background:-webkit-gradient(linear, 0 0, 100% 0, from(rgba(194,194,194,0.8)), to(rgba(194,194,194,0.8)), color-stop(50%, rgba(194,194,194,0.8)));
    background-size:80% 1px;
    background-repeat:no-repeat;
    background-position: center bottom;
    /*background: url(3.svg#4) no-repeat center bottom;
     -webkit-background-size:100px 1px;*/
}
.nav4 dl dd:last-of-type{
    background:none;
}
.nav4 dl dd a{
    font-size: 15px;
    display:block;
    color:#4f4d4f;
    text-shadow:0px 1px 0px #ffffff;
    white-space: pre;
    overflow: hidden;
    text-overflow: ellipsis;
}
.nav4 .masklayer_div{
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 180;
    background: rgba(0,0,0,0);
}
.nav4 .masklayer_div.on{display: block;}