body{
    background: #f5fcff;
}
.con-data{
    width: 1200px;
    margin: 0 auto;
    min-height: 200px;
    background: #ffffff;
    margin-top: 10px;
    padding: 30px 20px;
    margin-bottom: 30px;
}
#chart1{
    width: 50%;
    height: 500px;
    float: left;
}
#chart2,#chart3{
    float: left;
    width: 50%;
    height: 500px;
}
#chart4{
    width: 50%;
    height: 500px;
    float: left;
}
#chart3,#chart4{
    margin-top: 100px;
}