*{
    padding: 0;
    margin:0;
    text-decoration: none;
    font-family: "微软雅黑", "Microsoft YaHei"!important;
}
.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0}
.clearfloat{zoom:1}
.margin{
    width: 100%;
    margin:0 auto;
}
html,body{
    height: 100%;
}
body{
    overflow: hidden;
    background: #131d1e;
}
.nav{
    background: #131d1e;
    padding:0 2.25vw;
}
iframe{
    display: none;
    width:100%;
    height:100%;
    position:absolute;
    top:0;
    left:0;
    border:none;
    overflow:hidden;
    z-index: 999;
}
#exitrobot{
    display: none;
    width:3.92vw;
    height:3.92vw;
    position:absolute;
    top:15px;
    right:45px;
    cursor: pointer;
    z-index: 9999;
}
.nav a{
    float: left;
    text-align: center;
    width: 19.6vw;
    border-top: 2px solid #131d1e;
    font: 12px/30px "微软雅黑";
    color: #b1b5b7;
}
.nav a.active{
    color: #0dc5a0;
    border-color: #0dc5a0;
    background: #1b2729;
}
.nav span{
    float: right;
    width: 15px;
    height: 15px;
    margin-top: 8px;
    background: url("../img/back.png") no-repeat right center;
}
@media only screen and (min-width: 1025px) {
    .nav a{
        border-top: 2px solid #131d1e;
        font: 15px/38px "微软雅黑";
    }
    .nav span{
        width: 18px;
        height: 18px;
        margin-top: 11px;
    }
}
@media only screen and (min-width: 1281px) {
    .nav a{
        border-top: 3px solid #131d1e;
        font: 18px/45px "微软雅黑";
    }
    .nav span{
        width: 22px;
        height: 22px;
        margin-top: 13px;
    }
}
::-webkit-scrollbar {
    width: 10px;
    height: 8px;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    height: 50px;
    outline-offset: -2px;
    outline: 2px solid #666;
    -webkit-border-radius: 8px;
    border: 2px solid #666;
}
::-webkit-scrollbar-track-piece {
    background-color: #666;
    -webkit-border-radius: 8px;
}