message: feat(panel): sticky header! pure css!
diff: .panel-DictItem_Header {
  display: flex;
  align-items: flex-start;
  + position: sticky;
  + top: 0;
  + z-index: 100;
  height: 20px;
  border-top: 1px #ddd solid;
  + background: #fff;
  +
  + &::after {
  + content: '';
  + position: absolute;
  + top: 20px - 1px;
  + left: 0;
  + width: 100%;
  + height: 10px;
  + background: linear-gradient(#fff 5%, rgba(255, 255, 255, 0.3) 60%, transparent 100%);
  + }
  }
  .panel-DictItem_Logo {
  