body{    
    min-width: 1000px;
}
.hidden {
    overflow: hidden;
}
.w1800 {
    width: 1800px;
    margin: 0 auto;
}
.w1200 {
    width: 1200px;
    margin: 0 auto;
}

.left {
    float: left;
}

/* 二级页头 */
.header {
    margin: 0 auto;
    width: 1200px;
    height: 52px;
    margin-bottom: 18px;
    /* border: skyblue 1px solid; */
}
.logo {
   float: left;
    width: 129px;
    height: 36px;
    margin-top: 16px;
}
.nav {
    float: right;     
}
.nav ul li {
    float: left;
}
.nav ul li a {
    display: block;
    height: 52px;
    line-height: 75px;
    margin-left: 55px;
    font-size: 14px;
    color: #333;
    border-top: 2px solid transparent;
}
.nav ul li a:hover {
    border-top: 2px solid #f64011;
    color: #f64011;
}
.nav ul li a.selected {
    border-top: 2px solid #f64011;
    color: #f64011;
}

/* 二级页面横幅大图 */
.banner {
    width: 1800px;
    height: 500px;
    margin: 0 auto;
}
/* 二级页面大标题 */
.miantitle {
    width: 1200px;
    text-align: center;    
    margin: 0 auto;
}
.miantitle h6 {
    font-size: 24px;
    color: #333;
    margin-top: 60px;
}
.miantitle h1 {
    font-size: 42px;
    color: #f64011;
    margin-top: 20px;
}
.miantitle p {
    font-size: 16px;
    color: #666;
    text-align: left;
    line-height: 2;
    margin-top: 22px;
    text-transform: uppercase;
}



/* 页尾-二级页面 */
.erjifooter {
    height: 338px;
    position: relative;
    margin-top: 60px;
}
.footer {
    position: absolute;
    height: 267px;
    margin: auto;    
    left: 0;
    right: 0;
    bottom: 0;
    background: #2b2b2b;    
}
/* 页尾地址 */
.address {
    position: absolute;
    width: 1200px;
    height: 338px;
    margin: auto;    
    left: 0;
    right: 0;
    bottom: 0;
    background: url(../images/address.png) no-repeat 0 0/100%;

}
/* 关于我们页面地址 */
.address_us {
    position: absolute;
    width: 1200px;
    height: 368px;
    margin:auto;
    left: 0;
    right: 0;
    bottom: 0;
    background: url(../images/addressus.png) no-repeat 0 0/100%;
}

.address h1, .address_us h1 {
    font-size: 32px;
    color: #fff;  
    margin-left: 52px;
    font-weight: 400;    
}
.address h1 {
    margin-top: 48px;
}
.address_us h1 {
    margin-top: 51px;
}
.address p, .address_us p {
    font-size: 14px;
    color: #fff;
    
    margin-left: 52px;
    line-height: 1.8;
}
.address p {
    margin-top: 24px;
}
.address_us p {
    margin-top: 26px;
}