ul,li{list-style: none;}
.media-lis{}
.media-title{
  text-align: center;
  font-size:20px;
  font-weight: bold;
}
.media-list ul{
  padding:15px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
} 
.media-list li{
  margin: 10px 15px;
}
.media-list li img{
  width: 250px;
  height:150px;
}
.media-tips{
  text-align: center;
}