@media only screen and (max-width: 1179px) {
    .wrapper{
        width: 1024px;
    }
   .topmenu{
      width: 100%;
       background: #fff;
       position: absolute;
       bottom: inherit;
       top: 40px;
       left: 0;
       padding: 30px 10px;
       z-index: 8900;
       display: none;
   }
    .topmenu li{
        margin: 0 0 20px 0;
    }
    .topmenu li a{
        font-size: 20px;
    }
    .mm_link{
        display: block;
    }
    .about_info{
        width: 53%;
    }
    .tm_reg_btn{
        width: 290px;
    }
    .speaker_block{
        margin: 0 43px;
    }
    .speaker_wp {
        margin-left: -33px;
        margin-right: -33px;
    }
}
@media only screen and (max-width: 1023px) {
    .wrapper {
        width: 768px;
    }
    .about_img{
        position: static;
        width: 100%;
        text-align: center;
        margin-bottom: 20px;
    }
    .about_img img{
        width: 70%;
        height: auto;
    }
    .about_info{
        width: 100%;
        padding-bottom: 0;
    }
    .about_wp{
        padding-top: 30px;
    }
    .screen_3{
        padding-top: 30px;
    }
    .program_img{
        display: none;
    }
    .screen_4{
        padding-top: 0;
    }
    .copyright{
        margin-right: 0;
    }
    .screen_1 {
        background: none;
        padding-bottom: 50px;
    }
    .speaker_block{
        margin: 0 48px;
    }
    .speaker_wp {
        margin-left: -38px;
        margin-right: -38px;
        justify-content: center;
    }
    .screen_2 {
        margin-top: 200px;
    }
}
@media only screen and (min-width: 767px) {
    .speaker_block{
        display: none;
    }
    .speaker_wp .speaker_block:nth-child(1){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(2){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(3){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(4){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(5){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(6){
        display: block;
    }
    
}
@media only screen and (max-width: 767px) {
    .wrapper {
        width: 480px;
    }
    .title_f1{
        font-size: 32px;
    }
    h1{
        font-size: 32px;
    }
    .speaker_block{
        width: 100%;
    }
    .brand_block{
        width: 33.333%;
        margin-bottom: 20px;
    }
    .brand_block img{
        width: 90%;
        height: auto;
    }
    .screen_6{
        padding-top: 30px;
    }
    .contacts_column{
        width: 100%;
    }
    .contacts_wp{
        padding-bottom: 30px;
    }
    footer{
        padding: 30px 0;
    }
    footer .social_block a{
        margin-left: 0;
        margin-right: 12px;
    }
    .copyright{
        margin-bottom: 20px;
        width: 100%;
    }
    h2{
        margin-left: 0 !important;
    }
    .screen_4 h2 {
        margin-left: 10px !important;
    }
    footer .social_block {
        justify-content: space-between;
        width: 100%;
    }
    footer .social_block a{
        margin-right: 0;
    }

    .title_f2 {
        width: 300px;
    }
    .mob_s_btn{
        margin-bottom: 70px;
    }
    .speaker_block{
        display: none;
    }
    .speaker_wp .speaker_block:nth-child(1){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(2){
        display: block;
    }
    .speaker_wp .speaker_block:nth-child(3){
        display: block;
    }
    .speaker_open .speaker_block{
        display: block;
    }
}
@media only screen and (max-width: 479px) {
    .wrapper {
        width: 100%;
    }
    .title_f2{
        width: 260px;
    }
    h1{
        margin-bottom: 30px;
        font-size: 28px;
        line-height: 42px;
    }
    .brand_block{
        width: 100%;
    }
    .pb_title{
        font-size: 18px;
    }
    .pb_list li{
        font-size: 18px;
    }
    .about_info p{
        font-size: 18px;
    }
    header{
        padding-top: 20px;
    }
    header .social_block{
        width: 100%;
        -webkit-box-pack: justify;
        -moz-box-pack: justify;
        -ms-flex-pack: justify;
        -webkit-justify-content: space-between;
        justify-content: space-between;
        padding-top: 20px;
    }
    header .social_block a{
        margin: 0;
    }
    .screen_1{
        padding-top: 200px;
    }
    .h_left {
        width: 100%;
    }
    .logo {
        margin-left: auto;
    }
    header{
        margin-top: 0;
    }
    .c_title{
        font-size: 20px;
    }
    .cb_name{
        font-size: 20px;
    }
    .cb_text{
        font-size: 20px;
    }
    .ab_link{
        font-size: 20px;
    }
    .sb_title{
        font-size: 20px;
    }
    .sb_text{
        font-size: 18px;
        line-height: 24px;
    }
    header .social_block {
        display: none;
    }
}
@media only screen and (max-width: 359px) {

}