test.scss

  &--collapse {
    &.is-active {
      .el-collapse-item__header {
        padding-bottom: 0;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
      }
    }

    div[role='tab'] {
      border-radius: inherit;
    }

    .el-collapse-item {
      &__content {
        padding-bottom: 0px;
      }

      &__wrap,
      &__header {
        padding: 25px;
        height: auto;
      }

      &__wrap {
        border-radius: 0;
        border-bottom-left-radius: inherit;
        border-bottom-right-radius: inherit;
      }

      &__header {
        border-radius: inherit;
      }
    }

    .el-collapse-item__arrow {
      margin-left: 15px;
    }
  }