.banner {
    background-color: #f3f5f8;
    background-image: url(https://files.yuanian.com/yuanian/page_image/Ywszh/cg_image/banner.jpg);
}
.banner_main h3:nth-child(2) {
    font-size: 30px;
    font-weight: 500;
    text-align: left;
    color: #323232;
    line-height: 53px;
}

.banner_main p:nth-child(3) {
    font-size: 18px;
    color: #191818;
    font-weight: 500;
    padding-top: 14px;

}

.banner_main p:nth-child(4),
.banner_main p:nth-child(5) {
    color: #191818;
    font-weight: 400;
    font-size: 14px;
    width: 500px;
    line-height: 20px;
    padding-top: 11px;
}
.banner_main span{
    margin-top: 0px;
}
.product {
    margin: 0 auto;
    text-align: center;
    padding-bottom: 60px;
}

.product img {
    width: 940px;
    margin-top: 26px;
}

.product p {
    width: 939px;
    margin: 0 auto;
    text-align: left;
    color: #191818;
    font-size: 18px;
    font-weight: 500;
}

.mian1 {
    width: 100%;
    background-color: #f3f5f8;
}

.mian1 .main1_center {
    width: 1005px;
    margin: 0 auto;
}

.mian1 .main1_center dl {
    width: 257px;
    padding-left: 36px;
    padding-right: 36px;
    position: relative;
    float: left;
    height: 84px;
    /* display: inline-block; */
    margin-bottom: 32px;
}

.mian1 .main1_center span {
    height: 84px;
    width: 1px;
    background: #eaeaea;
    float: left;
}

.mian1 .main1_center dl dt {
    position: absolute;
    color: #e3e7ed;
    font-size: 80px;
    font-weight: bold;
    text-align: center;
    margin: 0 auto;
    width: 100%;
    width: 263px;
    line-height: 63px;
}

.mian1 .main1_center dl dd {
    z-index: 99;
    position: absolute;
    color: #191818;
    font-size: 14px;
    margin-top: 10px;
    font-weight: 500;
    line-height: 22px;
}

.mian2 .mian2_center {
    width: 1016px;
    margin: 0 auto;
    background: darkblue;
}

.mian2 .mian2_center dl {
    width: 260px;
    height: auto;
    float: left;

    margin-right: 118px;
    margin-bottom: 56px;

}

.mian2 .mian2_center dl:nth-child(3n+0) {
    margin-right: 0px;
}

.mian2 .mian2_center dl dt {
    float: left;
    width: 38px;
}

.mian2 .mian2_center dl dt img {
    width: 38px;
    /* height: 36px; */
}

.mian2 .mian2_center dl dd {
    float: right;
    width: 210px;
}

.mian2 .mian2_center dl dd .title {
    color: #2a2a2a;
    font-size: 18px;
    margin-bottom: 10px;
    font-weight: 600;
}

.mian2 .mian2_center dl dd .paragraph {
    color: #828a92;
    font-size: 13px;
    line-height: 27px;
}

.mian3 {
    background-color: #1c2532;
    background: url(https://files.yuanian.com/yuanian/page_image/Ywszh/cg_image/280.jpg) center center;
    background-size: 100% 100%;
 padding-bottom: 60px;
}

.mian3 h2 {
    color: #Fff;
padding-bottom: 25px !important;
}

.mian3 .title {
    color: #fff;
    margin-bottom: 47px;
    text-align: center;
}

.mian3 .mian3_center {
    width: 1052px;
    margin: 0 auto;
}

.mian3 .mian3_center dl {
    width: 247px;
    height: 229px;
    background: #fff;
    text-align: center;
    /* float: left; */
    margin-right: 16px;
    display: inline-block;

}

.mian3 .mian3_center dl:nth-last-child(1) {
    margin-right: 0px;
}

.mian3 .mian3_center dl dt img {
    width: 40px;
    height: 40px;
    text-align: center;
    margin: 0 auto;
    margin-bottom: 13px;
    margin-top: 30px;

}

.mian3 .mian3_center dl dt p {
    color: #2a2a2a;
    font-size: 18px;
    font-weight: bold;
}

.mian3 .mian3_center dl dd p {
    color: #828a92;
    font-size: 13px;
    width: 140px;
    margin: 0 auto;
    margin-top: 20px;
    line-height: 22px;
}

@media screen and (max-width: 800px) {
    .banner_container {
        height: 260px;
    }
    .banner_main span {
        margin-top: 20px;
    }
    .banner_main h3:nth-child(2){
        font-size: 20px;
    }
    .mian3,.product{
        padding-bottom: 30px;
    }
    .banner_main {
        width: 92%;
    }

    .banner {
        background-position: center top;
        background-size: unset;
    }
    .banner_main h1:nth-child(2){
        /* font-size: 28px; */
        font-size: 20px;
    }
    .banner_main p {
        width: 100% !important;
    }

    .banner_main p:nth-child(3),
    .banner_main p:nth-child(4) {
        width: 100%;
    }

    .product p {
        width: 92%;
        margin: 0 auto;
        text-align: center;
    }

    .product img {
        width: 92%;
    }

    .mian1 .main1_center {
        width: 92%;
    }

    .mian1 .main1_center span {
        display: none;
    }

    .mian1 .main1_center dl {
        width: 90%;
        padding: 5%;
        margin: 0 auto;
        text-align: center;
        float: none;
    }

    .mian1 .main1_center dl dt {
        width: 80%;
    }

    .mian1 .main1_center dl dd {
        padding-top: 10px;
       left: 0px;
    }

    .mian2 .mian2_center {
        width: 92%;
    }

    .mian2 .mian2_center dl {
        width: 100%;
        /* float: none; */
        margin-right: 0px;
    }

    .mian2 .mian2_center dl dd {
        float: right;
        width: 86%;
    }

    .mian3 {
        height: auto;
        background-size: auto;
    }

    .mian3 .mian3_center {
        width: 100%;
        margin: 0 auto;
        text-align: center;
    }

    .mian3 .mian3_center dl {
        width: 92%;
        margin: 0 auto;
        text-align: center;
        margin-bottom: 20px;
    }
}