.wrapper{
    width: 100%;
    background: #fff;
    min-width: 1100px;
}
.header{
    width: 100%;
    height:auto;
    background: #fff;
    position: fixed;
    left: 0;
    top: 0;
    z-index:1991620;
}
.header ul{
    float: right;
    width: auto;
    height: auto;
}
.header ul li{
    /*float: left;*/
    /*padding:15px 10px;*/
    /*text-align: center;*/

}
.header ul li a {
    display: inline-block;
    width: 100%;
    color: #333;
}
.nav{
    width: 100%;
    height: 80px;
    background: #fff;
}
.nav_model{
    width: 1100px;
    height: 80px;
    line-height: 80px;
    margin: 0 auto;
}
.nav_model img{
    vertical-align: middle;
}
.nav_model ul{
    float: right;
}
.nav_model ul li {
    display: inline-block;
    margin-left: 60px;
    font-size: 16px;
}
.nav_model ul li a:hover{
    color: #f58b19;
}
.banner{
    width: 100%;
    height: 500px;
    background: url("../img/p_big1.png") no-repeat center;
    background-size: cover;
    position: relative;
}
.banner_mes{
    position: absolute;
    top:50%;
    left:50%;
    transform: translate(-50%,-50%);
}
.banner_mes h4{
    color: #fff;
    font-size: 40px;
}
.mes{
    width: 1100px;
    margin: 0 auto;
    overflow: hidden;
}
.mes ul li{
    float: left;
    width: 328px;
    height: 325px;
    overflow: hidden;
    margin: 18px;
    background: #fff;
}
.mes ul li img{
    width: 328px;
    height: 230px;
    overflow: hidden;
}
.mes ul li h4{
    font-size: 18px;
	margin-top: 30px;
}
.mes ul li p{
    font-size: 16px;
    line-height: 28px;
    margin: 13px 0px;
}