@media (max-width: 600px) {
    main .content-wt {
        overflow: hidden;
    }

    main .topbg {
        width: 100%;
        height: 530px;
        color: #181818;
        z-index: -99999;
        position: relative;
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-position-x: 65%;
    }

    main .topbg .sxtitcen {
        /* width: 1200px; */
        height: 300px;
        margin: auto;
        padding-top: 140px;
        position: relative;
    }

    main .topbg .sxtitcen p {
        /* width: 396px; */
        height: 32px;
        font-weight: 400;
        font-size: 16px;
        color: #FFFFFF;
        line-height: 32px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        display: none;
    }

    main .topbg .sxtitcen h2 {
        /* width: 512px; */
        height: 186px;
        font-weight: 700;
        font-size: 24px;
        color: #FFFFFF;
        line-height: 93px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        z-index: -99999;
        display: none;
    }

    main .feature {
        width: 100%;
        background: #F5F7FA;
    }

    main .feature div {
        width: 100%;
        overflow: hidden;
        margin: auto;
        text-align: center;
    }

    main .feature h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 100px;
        margin-bottom: 80px;
    }

    main .feature ul {
        width: 90%;
        margin: auto;
        padding: 0;
    }

    main .feature ul li {
        width: 97%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: none;
        margin: auto;
        /* margin-right: 20px; */
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .feature ul li a {
        position: absolute;
        width: 66%;
        left: 27%;
        top: 37%;
    }

    main .feature ul li h4 {
        width: 100%;
        max-width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .feature ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .feature ul li:hover a h4 {
        color: #0073FF;
    }

    main .feature ul li:hover {
        background-image: url(/images/icon_xz.png);
    }

    main .pollution {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .pollution div {
        width: 100%;
        min-height: 880px;
        margin: auto;
        text-align: center;
    }

    main .pollution h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 20px;
        margin-bottom: 80px;
    }

    main .pollution ul {
        width: 90%;
        min-height: 1800px;
        margin: auto;
    }

    main .pollution ul li {
        width: 97%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: none;
        margin: auto;
        /* margin-right: 20px; */
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .pollution ul li a {
        position: absolute;
        width: 66%;
        left: 27%;
        top: 37%;
    }

    main .pollution ul li h4 {
        width: 100%;
        max-width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .pollution ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .pollution ul li:hover a h4 {
        color: #0073FF;
    }

    main .pollution ul li:hover {
        background-image: url(/images/icon_xz.png);
    }
}

@media (min-width: 600px) and (max-width: 767px) {
    main .content-wt {
        min-height: 1000px;
    }

    main .topbg {
        width: 100%;
        height: auto;
        color: #181818;
        z-index: -99999;
        position: relative;
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-position-x: 65%;
    }

    main .topbg .sxtitcen {
        /* width: 1200px; */
        height: 300px;
        margin: auto;
        padding-top: 20%;
        padding-left: 15%;
        position: relative;
    }

    main .topbg .sxtitcen p {
        /* width: 396px; */
        height: 32px;
        font-weight: 400;
        font-size: 22px;
        color: #FFFFFF;
        line-height: 32px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        z-index: -99999;
    }

    main .topbg .sxtitcen h2 {
        /* width: 512px; */
        height: 186px;
        font-weight: 700;
        font-size: 64px;
        color: #FFFFFF;
        line-height: 93px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        z-index: -99999;
    }

    main .feature {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .feature div {
        width: 100%;
        min-height: 950px;
        margin: auto;
        text-align: center;
    }

    main .feature h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 100px;
        margin-bottom: 80px;
    }

    main .feature ul {
        width: 80%;
        min-height: 2000px;
        margin: auto;
    }

    main .feature ul li {
        width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: none;
        margin: auto;
        /* margin-right: 20px; */
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .feature ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .feature ul li h4 {
        width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .feature ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .feature ul li:hover a h4 {
        color: #0073FF;
    }

    main .feature ul li:hover {
        background-image: url(/images/icon_xz.png);
    }

    main .pollution {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .pollution div {
        width: 100%;
        min-height: 880px;
        margin: auto;
        text-align: center;
    }

    main .pollution h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 20px;
        margin-bottom: 80px;
    }

    main .pollution ul {
        width: 80%;
        min-height: 1800px;
        margin: auto;
    }

    main .pollution ul li {
        width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: none;
        margin: auto;
        /* margin-right: 20px; */
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .pollution ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .pollution ul li h4 {
        width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .pollution ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .pollution ul li:hover a h4 {
        color: #0073FF;
    }

    main .pollution ul li:hover {
        background-image: url(/images/icon_xz.png);
    }
}

@media (min-width: 768px) {
    main .content-wt {
        min-height: 1000px;
    }

    main .topbg {
        width: 100%;
        height: 760px;
        color: #181818;
        z-index: -99999;
        position: relative;
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-position-x: 65%;
    }

    main .topbg .sxtitcen {
        /* width: 1200px; */
        height: 300px;
        margin: auto;
        padding-top: 20%;
        padding-left: 15%;
        position: relative;
    }

    main .topbg .sxtitcen p {
        /* width: 396px; */
        height: 32px;
        font-weight: 400;
        font-size: 22px;
        color: #FFFFFF;
        line-height: 32px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        z-index: -99999;
    }

    main .topbg .sxtitcen h2 {
        /* width: 512px; */
        height: 186px;
        font-weight: 700;
        font-size: 64px;
        color: #FFFFFF;
        line-height: 93px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        z-index: -99999;
    }

    main .feature {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .feature div {
        width: 100%;
        min-height: 950px;
        margin: auto;
        text-align: center;
    }

    main .feature h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 100px;
        margin-bottom: 80px;
    }

    main .feature ul {
        width: 100%;
        min-height: 1100px;
        margin: auto;
        max-width: 810px;
    }

    main .feature ul li {
        width: 48%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .feature ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .feature ul li h4 {
        width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .feature ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .feature ul li:hover a h4 {
        color: #0073FF;
    }

    main .feature ul li:hover {
        background-image: url(/images/icon_xz.png);
    }

    main .pollution {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .pollution div {
        width: 100%;
        min-height: 880px;
        margin: auto;
        text-align: center;
    }

    main .pollution h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 20px;
        margin-bottom: 80px;
    }

    main .pollution ul {
        width: 100%;
        min-height: 1100px;
        margin: auto;
        max-width: 810px;
    }

    main .pollution ul li {
        width: 48%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .pollution ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .pollution ul li h4 {
        width: 240px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .pollution ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .pollution ul li:hover a h4 {
        color: #0073FF;
    }

    main .pollution ul li:hover {
        background-image: url(/images/icon_xz.png);
    }
}

@media (min-width: 992px) {
    main .content-wt {
        min-height: 1000px;
    }

    main .topbg {
        width: 100%;
        height: 760px;
        color: #181818;
        z-index: -99999;
        position: relative;
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-position-x: 65%;
    }

    main .topbg .sxtitcen {
        /* width: 1200px; */
        height: 300px;
        margin: auto;
        padding-top: 20%;
        padding-left: 15%;
        position: relative;
    }

    main .topbg .sxtitcen p {
        /* width: 396px; */
        height: 32px;
        font-weight: 400;
        font-size: 22px;
        color: #FFFFFF;
        line-height: 32px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        z-index: -99999;
    }

    main .topbg .sxtitcen h2 {
        /* width: 512px; */
        height: 186px;
        font-weight: 700;
        font-size: 64px;
        color: #FFFFFF;
        line-height: 93px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        z-index: -99999;
    }

    main .feature {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .feature div {
        width: 100%;
        min-height: 950px;
        margin: auto;
        text-align: center;
    }

    main .feature h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 100px;
        margin-bottom: 80px;
    }

    main .feature ul {
        width: 100%;
        min-height: 730px;
        margin: auto;
        max-width: 1130px;
    }

    main .feature ul li {
        width: 31%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .feature ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .feature ul li h4 {
        width: 225px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .feature ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .feature ul li:hover a h4 {
        color: #0073FF;
    }

    main .feature ul li:hover {
        background-image: url(/images/icon_xz.png);
    }

    main .pollution {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .pollution div {
        width: 100%;
        min-height: 880px;
        margin: auto;
        text-align: center;
    }

    main .pollution h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 20px;
        margin-bottom: 80px;
    }

    main .pollution ul {
        width: 100%;
        min-height: 730px;
        margin: auto;
        max-width: 1130px;
    }

    main .pollution ul li {
        width: 31%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .pollution ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .pollution ul li h4 {
        width: 225px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .pollution ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .pollution ul li:hover a h4 {
        color: #0073FF;
    }

    main .pollution ul li:hover {
        background-image: url(/images/icon_xz.png);
    }
}

@media (min-width: 1200px) {
    main .content-wt {
        min-height: 1000px;
    }

    main .topbg {
        width: 100%;
        height: 760px;
        color: #181818;
        z-index: -99999;
        position: relative;
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        background-position-x: 65%;
    }

    main .topbg .sxtitcen {
        /* width: 1200px; */
        height: 300px;
        margin: auto;
        padding-top: 15%;
        padding-left: 15%;
        position: relative;
    }

    main .topbg .sxtitcen p {
        /* width: 396px; */
        height: 32px;
        font-weight: 400;
        font-size: 22px;
        color: #FFFFFF;
        line-height: 32px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        z-index: -99999;
    }

    main .topbg .sxtitcen h2 {
        /* width: 512px; */
        height: 186px;
        font-weight: 700;
        font-size: 64px;
        color: #FFFFFF;
        line-height: 93px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        z-index: -99999;
    }

    main .feature {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .feature div {
        width: 100%;
        min-height: 950px;
        margin: auto;
        text-align: center;
    }

    main .feature h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 100px;
        margin-bottom: 80px;
    }

    main .feature ul {
        width: 100%;
        min-height: 730px;
        margin: auto;
        max-width: 1130px;
    }

    main .feature ul li {
        width: 31%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .feature ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .feature ul li h4 {
        width: 225px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .feature ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .feature ul li:hover a h4 {
        color: #0073FF;
    }

    main .feature ul li:hover {
        background-image: url(/images/icon_xz.png);
    }

    main .pollution {
        width: 100%;
        min-height: 600px;
        background: #F5F7FA;
    }

    main .pollution div {
        width: 100%;
        min-height: 880px;
        margin: auto;
        text-align: center;
    }

    main .pollution h3 {
        width: 100%;
        height: 52px;
        font-weight: 700;
        font-size: 36px;
        color: #181818;
        line-height: 52px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        margin-top: 0px;
        padding-top: 20px;
        margin-bottom: 80px;
    }

    main .pollution ul {
        width: 100%;
        min-height: 730px;
        margin: auto;
        max-width: 1130px;
    }

    main .pollution ul li {
        width: 31%;
        max-width: 386px;
        height: 112px;
        background: #FFFFFF;
        border-radius: 4px 4px 4px 4px;
        float: left;
        margin: auto;
        margin-left: 10px;
        margin-right: 5px;
        margin-bottom: 20px;
        background-image: url(/images/icon_wxz.png);
        background-repeat: no-repeat;
        background-position: left;
        background-color: #FFFFFF;
        background-position-x: 40px;
        background-size: 32px 32px;
        box-sizing: border-box;
        position: relative;
    }

    main .pollution ul li a {
        position: absolute;
        width: 66%;
        left: 25%;
        top: 37%;
    }

    main .pollution ul li h4 {
        width: 225px;
        height: 26px;
        font-weight: 700;
        font-size: 18px;
        color: #181818;
        line-height: 26px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin: 0px;
        position: relative;
    }

    main .pollution ul li samp {
        width: 16px;
        height: 16px;
        position: absolute;
        right: 0px;
    }

    main .pollution ul li:hover a h4 {
        color: #0073FF;
    }

    main .pollution ul li:hover {
        background-image: url(/images/icon_xz.png);
    }
}