.select-tree-container {
  position: relative;
  display: inline-block;
  outline: none;
  width: 100%;
}

.select-tree-container .select-panel {
  border: 1px solid #e5e6e7;
  line-height: 1.42857143;
  padding: 6px 24px 6px 12px;
  user-select: none;
}

.select-tree-container:focus .select-panel {
  border: 1px solid #5897fb;
}

.select-tree-container.open .select-panel {
  border: 1px solid #5897fb;
  border-bottom: none;
}

.select-tree-container .select-panel .select-value {
  height: 18px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.select-tree-container .select-tree-arrow {
  width: 4px;
  position: absolute;
  right: 12px;
  top: 17px;
}

.select-tree-container .select-tree-arrow:after {
  content: '';
  border-color: #999 transparent transparent;
  border-style: solid;
  border-width: 4px 4px 0;
  height: 0;
  left: 0;
  margin-left: -4px;
  margin-top: -2px;
  position: absolute;
  top: 50%;
  width: 0;
}

.select-tree-container.open .select-tree-arrow:after {
  border-color: transparent transparent #999;
  border-width: 0 4px 4px;
}

.select-tree-container .tree-panel {
  position: absolute;
  left: 0;
  width: 100%;
  top: 100%;
  border: 1px solid #5897fb;
  border-top: none;
  z-index: 9999;
  background: #FFFFFF;
  display: none;
  padding: 5px 0;
}

.select-tree-container.open .tree-panel {
  display: block;
}

.select-tree-container .tree-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.select-tree-container .tree-panel ul li .tree-option {
  padding-left: 10px;
  line-height: 30px;
  height: 30px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.select-tree-container .tree-panel ul li .tree-option:hover {
  background: #e3e3e3;
}

.select-tree-container .tree-panel ul li .tree-option.selected {
  background: #e3e3e3;
}

.select-tree-container .tree-panel .tree-option .tree-option-arrow {
  padding: 0 10px;
  position: relative;
}

.select-tree-container .tree-panel .tree-option .tree-option-arrow:before {
  content: '';
}

.select-tree-container .tree-panel .tree-option .tree-option-value {
  user-select: none;
}

.select-tree-container .tree-panel .tree-option .tree-option-arrow b {
  content: '';
  border-color: transparent transparent transparent  #999;
  border-style: solid;
  border-width: 5px;
  height: 0;
  left: 0;
  margin-left: 10px;
  margin-top: -5px;
  position: absolute;
  top: 50%;
  width: 0;
}

.select-tree-container .tree-panel .tree-option .tree-option-arrow.open b {
  border-color: #999 transparent transparent transparent;
  margin-left: 5px;
  margin-top: -2px;
}