.osbtn4 {
    display: inline-block;
    margin: 24px;
    width: 216px;
    height: 174px;
    background-image: url(/assets/images/support/bg.png);
}

.osbtn4_img {
    position: relative;
    top: 30px;
}

.bzul4 {
    margin-top: 0px;
    margin-right: auto;
    margin-left: auto;
    background-image: url(/assets/images/support/bg2.png);
    background-repeat: repeat-x;
    background-position: center center;
    padding-top: 32px;
}

.osbtn4_vid {
    position: relative;
    top: 58px;
    width: 216px;
    height: 44px; 
    background: url(/assets/images/support/demo_video.png) right top;
    display: none;
}

.osbtn4_vid:hover { background: url(/assets/images/support/demo_video_hover.png) right top; }

.mt20 {
    margin-top: 20px !important;
}

.borbox {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.bzul8 {
    margin: 20px auto;
    max-width: 1200px;
    margin-right: auto;
}