li a{font-family:"微软雅黑";}
.nav ul li:nth-child(6) .subnav{width:205%;}
.subnav{
    display:none;
    position: absolute;
    width: 175%;
    top: 60px;
    left: -15%;
    background: rgba(1,70,145,.8);}
.subnav li{width:100%;line-height:36px !important;}
.subnav li:after{display:none;}
.subnav li:hover{ background: rgba(1,70,145,1);}
.nav li:hover .subnav {display:block;}