.fl{
    float: left;
}
.fr{
    float: right;
}
.wrap{
    margin: 0 auto;
    max-width: 1200px;
}
.t-center{
    text-align: center;
}
.bg-black{
    background-color: #000;
    overflow: hidden;
}

.logo{padding-top: 25px;}


.nav{
    height: 100px;
    line-height: 100px;
    overflow: hidden;
}
.nav a{
    float: left;
    color: #fff;
    padding: 0 30px;
    text-decoration: none;
}
.nav a:hover{
   border-bottom: 4px #3399ff solid;
   height: 96px;
}
.floor{
    max-width: 1920px;
    margin: 0 auto;
    background-position: center;
    background-repeat: no-repeat;

}
.footer{
    color: #fff;
    height: 150px;
}
.inline{
    display: inline-block;
    width: 25%;
    margin-right: 20px;
    line-height: 33px;
}