@media screen and (min-width:2050px){
    .b1 h1{
        width:100%;
        top:38%;
        padding-left:0px;
        font-size:32px;
    }
    .b1 p{
        width:100%;
        top:44%;
        padding-left:0%;
        font-size:32px;
    }
}
@media screen and (min-width:1600px){
    .zoom_window_s2{
        width:60vh;
    }
}
@media screen and (min-width:1023px) and (max-width:1200px){
    .pl_off{
        display: none;
    }
}
@media screen and (max-width:1024px){
    .case_prev_text{
        position: relative;
        top:-10px;
        z-index: 1;
        /* transform: translateY(-50px); */
        cursor: pointer;
        color:white;
        text-decoration: none;
    }
    .case_prev_text img{
        position: relative;
        top:10px;
        width:32px;
    }
}
@media screen and (max-width:799px){
    .case_desc_off{
        display: block;
    }
    #cases_select_show2 p{
        position: relative;
        top:12px;
    }
}
@media screen and (max-width:599px){
    .pl_off{
        display: none;
    }
    .case_prev_text {
        left:83px;
        top:40px;
    }
    #cases_select_show2 p{
        top:12px;
    }
    .cases_select_box aside{
        padding:0px 10px;
        width:24%;
    }
}
@media screen and (max-width:520px){
    .b3_box div{
        width:90%;
    }
    .b3_box img{
        width:90%;
    }
    .b3_video div{
        width:90%;
    }
    .video{
        width:100%;
    }
    .arrow_up{
        display:block;
        position: absolute;
        bottom:5px;
        right:5px;
    }
}
@media screen and (max-width:500px){
    .case_prev_text {
        left:96px;
        /* top:-40px; */
    }
    #cases_select_show2 p{
        top:8px;
    }
}
@media screen and (max-width:360px){
    .case_prev_text {
        left:96px;
        top:0px;
    }
}
@media screen and (max-width:767px) and (min-width:300px){
    .b1 h1{
        color:rgb(190, 190, 190);
        width:100%;
    }
    .b1 p{
        color:rgb(190, 190, 190);
        width:100%;
    }
    .b1{
        background-size: cover;
        background-position: center;
        height:470px;
        width:100%;
    }
    .b1_fone{
        width:100%;
        height:470px;
    }
    .zoom_window_banners{
        display:none;
    }
    .zoom_window_s2{
        width:300px;
        height:300px;
    }
    .zoom_player_s2{
        left:50%;
        transform:translateX(-50%);
        width:98vw;
        top:25vh;
    }
    .zoom_window_fone1_banners{
        display: none;
    }
    .dec_off{
        display:block;
        margin-bottom:10px;
    }
}