@media only screen and (max-width: 1220px){
    /*产品inquiry表格布局开始*/
    .pi_content{
        width: 980px;
        height: auto;
        display: block;
        margin: 0 auto;

        font-family: Lato;
        font-size: 14px;
        color: #545454;
        font-weight: 400;
        letter-spacing: 0;
        line-height: 1.7em;
        text-align: left;
    }
    /*产品inquiry表格布局结束*/
}
@media only screen and (max-width: 990px){
    /*产品inquiry表格布局开始*/
    .pi_content{
        width: 750px;
        height: auto;
        display: block;
        margin: 0 auto;

        font-family: Lato;
        font-size: 14px;
        color: #545454;
        font-weight: 400;
        letter-spacing: 0;
        line-height: 1.7em;
        text-align: left;
    }
    /*产品inquiry表格布局结束*/
}
@media only screen and (max-width: 770px){
    /*产品inquiry表格布局开始*/
    .pi_content{
        width: 100%;
        height: auto;
        display: block;
        margin: 0 auto;

        font-family: Lato;
        font-size: 14px;
        color: #545454;
        font-weight: 400;
        letter-spacing: 0;
        line-height: 1.7em;
        text-align: left;
    }
    /*产品inquiry表格布局结束*/
}

@media only screen and (max-width: 480px){
    .control-group{width: 100%;}
    .controls>label{color: red; background-color: white;text-align: left;}
    .pi_info{width: 100%;overflow: auto;}
    body .inner{width: 458px;overflow: auto;}
}