.go-fieldset{
    border: 1px solid @border_color;
    position: relative;
    border-radius: 4px;
    padding-top: 10px;
    padding-bottom: 8px;
    color:@gray-dark;
    margin-bottom: 10px;
    font-weight: 500;
    .legend_title{
        position: absolute;
        font-size: 13px;
        font-weight: 500;
        top:-10px;
        left:12px;
        background-color: @whiteFFF;
        height: 20px;
        line-height: 20px;
        padding: 0 5px;
    }
}