*{ border: 0; padding: 0; margin: 0;}

body{ width: 100%;height: 100%;}
.MT16{
    margin-top: 16px;
}
.main{
    position: fixed;
    z-index: 50;
    width: 100%;
    height: 941px;
    background-color: black;
    background-size:cover;
}
.welcome{
    width: 100%;;
    height: 60px;
    line-height: 60px;
    background-color: #ff7410;
    text-align: center;
}
.welcome span{
    font-size: 26px;
    font-weight: bold;
    color: white;
    text-space: 2px;
    letter-spacing: 2px;
}

.product{
    width: 100%;;
    height: 432.7px;
}

.pic{
  width:33.333%;
  height:280px;
  line-height:280px;
  float:left;
  margin-top:10px;
  text-align:center;
}
.pic img{
   width:auto;
   height:100%;
}
.pic .ds{
    position: relative;
    top: -30px;
    left: -100px;
    color: white;
}