.se-ps-dropdown-bottom,
.se-ps-dropdown-top {
  z-index: 1;
}
.se-ps-dropdown-bottom .se-dropdown-trigger-btn,
.se-ps-dropdown-top .se-dropdown-trigger-btn {
  position: relative;
  width: 50px;
}
.se-ps-dropdown-bottom .se-dropdown-trigger-btn::before,
.se-ps-dropdown-top .se-dropdown-trigger-btn::before {
  content: '';
  position: absolute;
  background-size: 15px 15px;
  width: 15px;
  height: 15px;
}
.se-ps-dropdown-bottom .se-dropdown-trigger-btn::before {
  top: 10px;
  left: 9px;
  background-image: url('https://gw.alipayobjects.com/mdn/rms_c791a4/afts/img/A*mmwUToMBgEcAAAAAAAAAAABkARQnAQ');
}
.se-ps-dropdown-top .se-dropdown-trigger-btn::before {
  top: 8px;
  left: 9px;
  background-image: url('https://gw.alipayobjects.com/mdn/rms_c791a4/afts/img/A*LBBrRK6-KyQAAAAAAAAAAABkARQnAQ');
}