.upload-thumb {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
.upload-thumb .upload-list {
  display: inline-block;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  position: relative;
  -webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
          box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
  margin-right: 8px;
}
.upload-thumb .upload-list img {
  -o-object-fit: cover;
     object-fit: cover;
}
.upload-thumb .upload-btn {
  display: inline-block;
}
.upload-thumb .upload-list-cover {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
}
.upload-thumb .upload-list:hover .upload-list-cover {
  display: block;
}
.upload-thumb .upload-list-cover i {
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  margin: 0 2px;
}
.upload-thumb .list-group {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.upload-thumb .thumb-ghost {
  opacity: 0.5;
  background: #c8ebfb;
}