html,body{
  height:100%;
}
.main{
  padding-top:20px;
}
.detail-bd{
  position: relative;
  background-color: #f2f2f2;
}
.detail-bd .container{
  background-color: #fff;
}
.product-title{
  font-size:24px;
  font-weight: 700;
  margin-bottom: 15px;
}
.flat-menu {
  margin-top: 15px;
  margin-bottom: 15px;
}

.flat-menu .item {
    text-align: center;
    font-size: 16px;
    padding-top: 20px;
    padding-bottom: 20px;
    text-decoration:none;
    color:#333;
    background-color: #f2f2f2;
    border-right: 1px solid #fff;
    transition: background .5s;
    -moz-transition: background .5s;
    -webkit-transition: background .5s;
    -o-transition: background .5s;
}
.flat-menu .item:hover, 
.flat-menu .item:focus, 
.flat-menu .item:active,
.flat-menu .item.active {
  background-color: #f7f7f7;
  border-top: 2px solid #5cb85c;
  padding-top: 18px;
  cursor: pointer;
  text-decoration:none;
  color:#5cb85c;
}

.fixed-top {
    position: fixed;
    margin-top: 0;
    top: 0;
    width: 100%;
    z-index: 100;
}

@media (min-width: 768px){
  .product-desc dt{
    width:100px;
  }
  .product-desc dd{
    margin-left:100px;
  }
}