body {
            margin: 0 auto;
        }

        .width_300 {
            width: 300px;
        }
         .width_293 {
            width: 293px;
        }

        .top15 {
            margin-top: 15px;
          font-family: "思源黑体";
            font-size:16px;
        }
        .topleft15 {
            margin-top: 15px;
            text-align: left;
            line-height: 28px;
        }
        .div_top {
            text-align: center;
            width: 1580px;
        } 
        
        .float_left {
            float: left;
        }
        .font_big {
            font-size: 30px;
            line-height: 30px;
            font-family: "思源黑体";
        }
        .font_big45 {
            font-size: 30px;
           font-family: "思源黑体";
            line-height: 30px;
        }

        .div1 {
            height: 330px;
            background: #f2f2f2;
            padding-top: 40px;
        }
            .div1 .zi {
                margin-top: 60px;
                margin-left: 145px;
            }

            .div1 img {
                width: 120px;
                height: 120px;
            }

        .div2 {
            height: 600px;
            padding-top: 40px;
        }

            .div2 .zi {
                margin-top: 45px;
                margin-left: 15px;
            }

            .div2 img {
                width: 223px;
                height: 410px;
            }

        .div3 {
            height: 550px;
            background: #f2f2f2;
            padding-top: 40px;
        }
        .div4 {
            height: 440px;
            padding-top: 35px;
        }
            .div4 .zi {
                margin-top: 80px;
                margin-left: 0;
            }
                .div4 .zi .child {
                    margin-top: 50px;
                    margin-left: 190px;
                    width: 200px;
                    margin: 0 45px;
                }
                .div4 .zi .child strong{
                      font-size: 18px;
           font-family: "思源黑体";
                    }

        .div4 img {
            width: 80px;
            height: 80px;
        }

        .div5 {
            height: 440px;
            background: #f2f2f2;
            padding-top: 50px;
        }
        .div5 img {
            width: 175px;
            height: 251px;
        }
        .div6 {
            height: 450px;
            padding-top: 35px;
        }
            .div6 .zi {
                margin-top: 45px;
                margin-left: 35px;
            }
                .div6 .zi .child {
                    width: 200px;
                    margin: 0 30px;
                }
                .div6 .zi .child strong{
                     font-size: 18px;
           font-family: "思源黑体";
                    }
                .div6 .zi img {
                    width: 63px;
                    height: 64px;
                }