.i-content{ position:relative ;}
.i-content-left{ position: absolute;  background: url(../images/devices.png)no-repeat; width:550px;height: 611px; top: 30px;}
.about-body{font-size: 16px; line-height:30px;}
.about-b{color: #f0f0f0;font-weight: 200;font-size: 14px;}
.i-box{   width: 498px; height: 55px; margin-top: 200px; margin-right: 150px; position: absolute;left:50%;}

.i-box .i-box-left{float: left;}
.i-box .i-box-left .i-box-bth{ width:200px; height:40px; background: #373c41; color: #fff; line-height: 40px; text-align: center;}
@media (max-width: 768px) {
.top_cont_outer{ height: 600px;}	
.i-content{ position:relative; margin: 10px auto;}
.i-content-left{ background: url(../images/devices.png)no-repeat; width:550px;height: 611px;  margin:0px auto; position: relative; }
.slider{ margin: 59px 0px 0px 132px; padding-top:58px; width: 255px; height: 511px; }
.about-body{font-size: 16px; line-height:30px;}
.about-b{color: #f0f0f0;font-weight: 200;font-size: 14px;}
.i-box{ width: 272px;   position: relative;}

.i-box .i-box-left{float: none;}
.i-box .i-box-left .i-box-bth{ width:200px; height:40px; background: #373c41; color: #fff; line-height: 40px; text-align: center;}

}