.banner_pic
{
    -webkit-background-size:100%;
    background-size:cover;
    padding-top:20%;
}
.banner_pic div
{
    padding-bottom:50px;
    }
.banner_pic div h1
{
    font-family:黑体;
    font-size:60px;
    color:rgb(255,255,255);
}

.banner_pic div h2
{
    font-family:黑体;
    font-size:22px;
    color:rgb(255,255,255);
}
/*底部图片结束*/
.an_title
{
    margin: 100px 0 40px 0;
    text-align:center;
    }
.an_title h1
{
    font-family:黑体;
    font-size:30px;
    color:black;
    margin:10px 0;
    }
.an_title h2
{
    margin:10px 0;
    font-family:黑体;
    font-size:18px;
    color:black;
    }

@media screen and (max-width:768px)
{
    .banner_pic div {
    padding-bottom: 0px;
    }
    .banner_pic div  h1
    {
        font-size:30px;
    }
     .banner_pic div  h2
    {
        font-size:15px;
        margin: 0px 0 5px 0;
    }
}