@media screen and (min-width: 1400px) {
    h2 {
        font-size: 48px;
        text-align: center;
        color: #333;
        line-height: 1.2;
    }

    h3 {
        font-size: 24px;
        text-align: center;
        color: #666;
        font-weight: normal;
        margin: 20px 0 15px;
        line-height: 1.2;
    }

    .feedback {
        padding: 75px 0 90px;
        background: url(../images/contact.jpg) no-repeat center center;
    }

    .form {
        padding: 45px 0;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 20px;
        margin-top: 40px;
    }

    .form .content {
        width: 770px;
        margin: 0 auto;
    }

    .form h4 {
        font-size: 22px;
        color: #333;
        font-weight: normal;
        margin-bottom: 30px;
    }

    .form dl+dl {
        margin-top: 25px;
    }

    .form dl dt {
        font-size: 18px;
        color: #666;
        width: 125px;
        text-align: right;
    }

    .form dl dt span {
        color: #e43f3f;
    }

    .form dl dd {
        flex: 1;
        background-color: #fff;
        border: solid 1px #eee;
        border-radius: 5px;
        padding: 8px 15px;
    }

    .form dl dd input {
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd select {
        border: none;
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd textarea {
        font-size: 18px;
        border: none;
        width: 100%;
        font-family: 'Microsoft YaHei',
            '宋体',
            "Arial Narrow",
            HELVETICA;
    }

    .form dl:last-child dt {
        margin-top: 5px;
    }

    .form button {
        display: block;
        width: 135px;
        height: 50px;
        background: #01509f;
        color: #fff;
        font-size: 18px;
        border-radius: 10px;
        margin: 53px auto 0;
        cursor: pointer;
        border: none;
    }

    .address {
        padding: 75px 0;
        background-color: #f7f9fc;
    }

    .address h3 {
        margin-bottom: 50px;
    }

    .address .map {
        width: 600px;
        height: 380px;
    }

    .address ul {
        flex: 1;
        margin: 40px 0 0 50px;
    }

    .address ul li {
        font-size: 17px;
        color: #666;
        margin-top: 30px;
    }

    .address ul li img {
        margin-right: 10px;
    }
}

@media screen and (min-width: 1200px) and (max-width:1399px) {
    h2 {
        font-size: 40px;
        text-align: center;
        color: #333;
        line-height: 1.2;
    }

    h3 {
        font-size: 20px;
        text-align: center;
        color: #666;
        font-weight: normal;
        margin: 20px 0 15px;
        line-height: 1.2;
    }

    .feedback {
        padding: 75px 0 90px;
        background: url(../images/contact.jpg) no-repeat center center;
    }

    .form {
        padding: 45px 0;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 20px;
        margin-top: 40px;
    }

    .form .content {
        width: 670px;
        margin: 0 auto;
    }

    .form h4 {
        font-size: 22px;
        color: #333;
        font-weight: normal;
        margin-bottom: 30px;
    }

    .form dl+dl {
        margin-top: 25px;
    }

    .form dl dt {
        font-size: 18px;
        color: #666;
        width: 125px;
        text-align: right;
    }

    .form dl dt span {
        color: #e43f3f;
    }

    .form dl dd {
        flex: 1;
        background-color: #fff;
        border: solid 1px #eee;
        border-radius: 5px;
        padding: 8px 15px;
    }

    .form dl dd input {
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd select {
        border: none;
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd textarea {
        font-size: 18px;
        border: none;
        width: 100%;
        font-family: 'Microsoft YaHei',
            '宋体',
            "Arial Narrow",
            HELVETICA;
    }

    .form dl:last-child dt {
        margin-top: 5px;
    }

    .form button {
        display: block;
        width: 135px;
        height: 50px;
        background: #01509f;
        color: #fff;
        font-size: 18px;
        border-radius: 10px;
        margin: 53px auto 0;
        cursor: pointer;
        border: none;
    }

    .address {
        padding: 75px 0;
        background-color: #f7f9fc;
    }

    .address h3 {
        margin-bottom: 50px;
    }

    .address .map {
        width: 600px;
        height: 380px;
    }

    .address ul {
        flex: 1;
        margin: 40px 0 0 50px;
    }

    .address ul li {
        font-size: 17px;
        color: #666;
        margin-top: 30px;
    }

    .address ul li img {
        margin-right: 10px;
    }
}

@media screen and (min-width: 992px) and (max-width:1199px) {
    h2 {
        font-size: 40px;
        text-align: center;
        color: #333;
        line-height: 1.2;
    }

    h3 {
        font-size: 20px;
        text-align: center;
        color: #666;
        font-weight: normal;
        margin: 20px 0 15px;
        line-height: 1.2;
    }

    .feedback {
        padding: 75px 0 90px;
        background: url(../images/contact.jpg) no-repeat center center;
    }

    .form {
        padding: 45px 0;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 20px;
        margin-top: 40px;
    }

    .form .content {
        width: 570px;
        margin: 0 auto;
    }

    .form h4 {
        font-size: 22px;
        color: #333;
        font-weight: normal;
        margin-bottom: 30px;
    }

    .form dl+dl {
        margin-top: 25px;
    }

    .form dl dt {
        font-size: 18px;
        color: #666;
        width: 125px;
        text-align: right;
    }

    .form dl dt span {
        color: #e43f3f;
    }

    .form dl dd {
        flex: 1;
        background-color: #fff;
        border: solid 1px #eee;
        border-radius: 5px;
        padding: 8px 15px;
    }

    .form dl dd input {
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd select {
        border: none;
        font-size: 18px;
        outline: none;
        width: 100%;
    }

    .form dl dd textarea {
        font-size: 18px;
        border: none;
        width: 100%;
        font-family: 'Microsoft YaHei',
            '宋体',
            "Arial Narrow",
            HELVETICA;
    }

    .form dl:last-child dt {
        margin-top: 5px;
    }

    .form button {
        display: block;
        width: 135px;
        height: 50px;
        background: #01509f;
        color: #fff;
        font-size: 18px;
        border-radius: 10px;
        margin: 53px auto 0;
        cursor: pointer;
        border: none;
    }

    .address {
        padding: 75px 0;
        background-color: #f7f9fc;
    }

    .address h3 {
        margin-bottom: 50px;
    }

    .address .map {
        width: 400px;
        height: 280px;
    }

    .address ul {
        flex: 1;
        margin: 40px 0 0 50px;
    }

    .address ul li {
        font-size: 17px;
        color: #666;
        margin-top: 30px;
    }

    .address ul li img {
        margin-right: 10px;
    }
}

@media screen and (min-width: 768px) and (max-width:991px) {
    h2 {
        font-size: 36px;
        text-align: center;
        color: #333;
        line-height: 1.2;
    }

    h3 {
        font-size: 18px;
        text-align: center;
        color: #666;
        font-weight: normal;
        margin: 20px 0 15px;
        line-height: 1.2;
    }

    .feedback {
        padding: 55px 0 70px;
        background: url(../images/contact.jpg) no-repeat center center;
    }

    .form {
        padding: 25px 0;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 20px;
        margin-top: 40px;
    }

    .form .content {
        width: 500px;
        margin: 0 auto;
    }

    .form h4 {
        font-size: 22px;
        color: #333;
        font-weight: normal;
        margin-bottom: 30px;
    }

    .form dl+dl {
        margin-top: 25px;
    }

    .form dl dt {
        font-size: 16px;
        color: #666;
        width: 125px;
        text-align: right;
    }

    .form dl dt span {
        color: #e43f3f;
    }

    .form dl dd {
        flex: 1;
        background-color: #fff;
        border: solid 1px #eee;
        border-radius: 5px;
        padding: 8px 15px;
    }

    .form dl dd input {
        font-size: 16px;
        outline: none;
        width: 100%;
    }

    .form dl dd select {
        border: none;
        font-size: 16px;
        outline: none;
        width: 100%;
    }

    .form dl dd textarea {
        font-size: 16px;
        border: none;
        width: 100%;
        font-family: 'Microsoft YaHei',
            '宋体',
            "Arial Narrow",
            HELVETICA;
    }

    .form dl:last-child dt {
        margin-top: 5px;
    }

    .form button {
        display: block;
        width: 135px;
        height: 50px;
        background: #01509f;
        color: #fff;
        font-size: 16px;
        border-radius: 10px;
        margin: 53px auto 0;
        cursor: pointer;
        border: none;
    }

    .address {
        padding: 55px 0;
        background-color: #f7f9fc;
    }

    .address h3 {
        margin-bottom: 40px;
    }

    .address .map {
        width: 400px;
        height: 280px;
    }

    .address ul {
        flex: 1;
        margin: 40px 0 0 50px;
    }

    .address ul li {
        font-size: 16px;
        color: #666;
        margin-top: 30px;
    }

    .address ul li img {
        margin-right: 10px;
    }
}

@media screen and (max-width: 767px) {
    h2 {
        font-size: 36px;
        text-align: center;
        color: #333;
        line-height: 1.2;
    }

    h3 {
        font-size: 18px;
        text-align: center;
        color: #666;
        font-weight: normal;
        margin: 20px 0 15px;
        line-height: 1.2;
    }

    .feedback {
        padding: 35px 0 40px;
        background: url(../images/contact.jpg) no-repeat center center;
    }

        .feedback .container {
            width: 95%;
            margin: 0 auto;
        }

    .form {
        padding: 25px 0;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 20px;
        margin-top: 40px;
    }

    .form .content {
        width: 80%;
        margin: 0 auto;
    }

    .form h4 {
        font-size: 18px;
        color: #333;
        font-weight: normal;
        margin-bottom: 30px;
    }

        .form dl{
            flex-direction: column;
            align-items: flex-start;
        }

    .form dl+dl {
        margin-top: 25px;
    }

    .form dl dt {
        font-size: 14px;
        color: #666;
        width: 100px;
    }

    .form dl dt span {
        color: #e43f3f;
    }

    .form dl dd {
        width: calc(100% - 30px);
        background-color: #fff;
        border: solid 1px #eee;
        border-radius: 5px;
        padding: 8px 15px;
        margin-top: 10px;
    }

    .form dl dd input {
        font-size: 14px;
        outline: none;
        width: 100%;
    }

    .form dl dd select {
        width: 100%;
        border: none;
        font-size: 14px;
        outline: none;
    }

    .form dl dd textarea {
        font-size: 14px;
        border: none;
        width: 100%;
        font-family: 'Microsoft YaHei',
            '宋体',
            "Arial Narrow",
            HELVETICA;
    }

    .form dl:last-child dt {
        margin-top: 5px;
    }

    .form button {
        display: block;
        width: 135px;
        height: 40px;
        background: #01509f;
        color: #fff;
        font-size: 14px;
        border-radius: 10px;
        margin: 33px auto 0;
        cursor: pointer;
        border: none;
    }

    .address {
        padding: 35px 0;
        background-color: #f7f9fc;
    }

    .address h3 {
        margin-bottom: 30px;
    }

        .address .container.flex {
            flex-direction: column;
        }

    .address .map {
        width: 95%;
        height: 280px;
        margin: 0 auto;
    }

    .address ul {
        width: 95%;
        margin: 20px auto 0;
    }

    .address ul li {
        font-size: 14px;
        color: #666;
        margin-top: 20px;
    }

    .address ul li img {
        margin-right: 10px;
    }
}