body{
    font-family: 'microsoft yahei',Arial,Helvetica, sans-serif;
    color: #2F2F2F;
}
a{
    transition: 0.5s;
    -webkit-transition: 0.5s;
    -moz-transition: 0.5s;
}
ul{
    list-style:none;
}
.clear{
    clear: both;
}
.img-thumbnail{
    transition : opacity 0.7s;
}
.img-thumbnail:hover,
.opacity_img:hover{
    opacity: 0.75;
}

header{
    background-color: #fff;
}

/*顶部信息*/
.top_bg{
    background-color: #fff;
    color: #777777;
    width: 100%;
    height: 40px;
    border-bottom: 1px solid #efefef;
}
.top_welcome{
    display: inline-block;
    padding-top:12px;
}

/*顶部电话*/
.top_tel{
    float: left;
    margin-top: 38px;
}
.top_tel img{
    display: inline-block; 
    float: left; margin-right: 8