@media screen and (max-width: 991px) {
  .dbn {
    display: none;
  }
  .slider_bg h1 {
    font-size: 40px;
  }
  .slider_bg h2 {
    font-size: 26px;
  }
  .form_small_wrap {
    margin: 0 auto 35px auto;
  }
  .h1_main {
    font-size: 26px;
  }
  .h1_main br {
    display: none;
  }
  .main_from_title {
    font-size: 26px;
  }
  .main_input1 {
    margin-right: 25px;
  }
  .reviews_block img {
    width: 18.5%;
  }
  .text_block .title_text_block {
    font-size: 20px;
  }
  .reviews_block {
    padding: 20px 0 20px 20px;
  }
  .text_block {
    width: 72%;
  }
  .portfolio_block {
    width: 100%;
  }
  .portfolio_block img {
    width: 100%; 
  }
  .portfolio_title {
    font-size: 21px;
  }
  .portfolio_block p {
    font-size: 13px;
  }
  .arrow_block {
    width: 100%;
    -moz-background-size: 100%; /* Firefox 3.6+ */
    -webkit-background-size: 100%; /* Safari 3.1+ и Chrome 4.0+ */
    -o-background-size: 100%; /* Opera 9.6+ */
    line-height: 55px;
  }
  .arrow_desc {
    height: 60px;
        width: 100%;
  }
  .arrow_desc p {
    line-height: 20px;
    margin-top: 10px;
  }
  .arrow_desc p span {
    font-size: 20px;
  }
  .arrow_desc p br {
    display: block;
  }
  .arrow_block:nth-child(7) {
  width: 100%
    }
  .ml {
    margin-left: 0px;
    }
    .mr {
        margin-right: 0px;
    }
    .mln {
        margin-left: -30px;
    }
    .mln1 {
        margin-left: 170px;
    }
    .big_img_q {
        margin: 0 auto;
        width: 435px;
    }
    .img_wrap_q:nth-child(1) {
    margin-right: 30px;
    }
    .img_wrap_q:nth-child(2) {
        margin-right: 0;
    }
    .dbd {
    display: block;
    }
    .photo_block .vertical_arrow {
        position: absolute;
        bottom: 0;
        border-radius: unset;
    }
    .logo_desc {
        float: left;
    }
    .nonebox1 {
        width: 89%;
    }
}          
@media screen and (max-width: 766px) {
    .big_img_q {
        width: 100%;
    }
    .mln1 {
        margin-left: 0;
    }
    header img {
        margin: 30px auto 10px auto;
        display: block;
    }
    .dbx {
        display: none;
    }
    .call_back {
        float: none;
    }
    header a {
        width: 90%;
        margin: 0 auto;
    }
    .slider_bg h1 {
        font-size: 22px;
        margin-top: 26px;
        margin-bottom: 20px;
    }
    .slider_bg h2 {
        font-size: 18px;
        margin-bottom: 30px;
        line-height: 22px;
    }
    .h1_main {
        font-size: 18px;
        line-height: 24px;
        margin-top: 26px;
        margin-bottom: 20px;
    }
    .advantages_block p {
        font-size: 18px;
    }
    .advantages_block span {
        font-size: 14px;
    }
    .reason_block .dbx {
        display: none;
    }
    .advantages_block {
        margin-bottom: 20px;
    }
    .reason_block {
        margin-bottom: 20px;
    }
    .main_from_title {
        font-size: 18px;
        margin-top: 20px;
    }
    .main_input1 {
        width: 100%;
        margin-bottom: 10px;
    }
    .send_button1 {
        width: 100%;
        margin-bottom: 20px;
    }
    .text_block {
        width: 95%;
    }
    .name {
        font-family: 'PTSans-Bold';
        font-size: 18px;
        color: #1a1a18;
    }
    .function {
        font-family: 'PTSans-Regular';
        font-size: 16px;
        color: #808080;
    }
    .text_block .title_text_block {
        font-size: 18px;
    }
    .text_block {
        margin-top: 10px;
    }
    .arrow_desc {
        height: auto;
    }
    .mln {
        margin-left: 0;
    }
    .textblock {
        width: 90%;
        margin: 0 auto;
        left:0;
        height: auto;
    }
    .questins_wrap .dbx {
        display: none;
    }
    .img_wrap_q {
        width: 50%;
    }
    .img_wrap_q:nth-child(1) {
        margin-right: 0;
    }
    .photo_block img {
        width: 90%;
    }
    .questins_wrap .h1_main {
        font-size: 18px;
    }
    .h2_main {
        font-size: 16px;
        margin-bottom: 15px;
    }
    .photo_block p {
        font-size: 16px;
    }
    footer .call_bottom {
        display: none;
    }
    .pol {
        text-align: center;
        margin: 0 auto;
        display: block;
    }
    footer {
        margin: 20px 0;
        box-shadow: none;
    }
    .portfolio_block {
    width: 100%;
    height: auto;
    }
    .overlay1 {
        display: none!important;
    }
    .nonebox {
        width: 89%;
        height: 100px;
    }
    .nonebox1 {
        width: 89%;
        height: auto;
        top: 80%!important;
        display: none;
    }
    .nonebox .form_small_wrap {
        padding: 10px;
        margin: 0 auto;
        min-height: 250px;
    }
    a.box-close{
    float:right;
    width:15px;
    height:15px;
    background:url('../images/close_black.png') repeat top left;;
        margin: 6px 6px 0px 0px;
    cursor:pointer;
    display:block
    }
}