.bd { zoom:1; margin-top: 30px;   }
/*.slideTxtBox .bd .bd_m{ border:4px solid #fff; ;zoom:1;  }*/

.tab{ width: 99%; overflow: hidden; position: relative; }
.bor_ff{ border:4px solid #fff; background:#fff;height: 275px; }
.tab .lis .title{width: 100%; height: 275px; position: absolute;z-index:2;filter:alpha(opacity=80);-moz-opacity:0.8;-khtml-opacity: 0.8;opacity:0.8; transition:all 0.3s; }
.tab .lis .title .title_text{width: 100%; height: 275px; text-align:center;  position: absolute;z-index: 2;color: #fff; }
.tab .lis .title .title_text p{font-size: 18px; margin-top: 60px;text-transform: uppercase;}
.tab .lis .title .title_text img{ margin-top: 10px;}
.tab .lis .title em{width: 100%; height: 275px; background:url("../images/vid_bg.png"); position: absolute;z-index: 1;}
.tab .lis .title_act{width: 100%; height: 275px;display:none; position: absolute;z-index: 1;filter:alpha(opacity=0);-moz-opacity:0;-khtml-opacity: 0;opacity: 0;}


.tab .lis{ width: 263px; overflow: hidden; float: left; border-left:1px solid #fff;position: absolute;transition:all 0s;z-index:2;}
.tab .lis:hover{cursor: pointer;}

.tab .li_1{ width: 587px;  left: 0;}
.tab .li_2{ width: 155px; left: 587px; }
.tab .li_3{ width: 155px; left:742px; }
.tab .li_4{ width: 155px; left: 897px;}
@media screen and (max-width:1100px){}