.rc-collapse > .rc-collapse-item > .rc-collapse-header {
  height: 20px;
  line-height: 20px;
  background-color: ##f4f4f4;
  &:hover {
    background-color: #ddd;
  }
}

.no-padding .rc-collapse-content {
  padding: 0;
  margin:0;
}

.header {
  position: fixed;
  left: 0;
  top: 0;
  display: flex;
  width: 100%;
  justify-content: space-between;
  padding: 5px;
  z-index: 99999;
}

.main-area {
  margin-top: 100px;
}
.distortion-button {
  position: absolute;
  right: 0;
}

.button-margin a {
  margin-bottom: 10px;
}
