.header_box{
    background:rgba(34,34,34,0.8);
}
.header{
    width:1200px;
    margin:0 auto;
    height:100px;
    overflow: hidden;
    line-height: 100px;
}
.header .index{
    float: right;
    font-size:20px;
    color:#fff;
    font-weight: bold;
    margin-left:70px;
}
.header img{
    float:left;
    cursor: pointer;
}
.header .img_1{
    padding-top:30px;
}
.header .img_2{
    width:300px;
    padding-top:30px;
}
.middle_content{
    width:1200px;
    margin:60px auto;
    overflow: hidden;
}
.middle_content .pic{
    width:500px;
    float: left;
    margin:0 25px;
}
.footer{
    background:rgba(34,34,34,0.8);
    padding:50px;
    text-align: center;
}
.footer p{
    font-size:18px;
    color:#fff;
    line-height: 54px;
}