arc-hive-wordpress-theme/dist/assets/scss/components/_accordion.scss

.accordion-item {
  border-bottom: 1px solid $body-font-color;
}
.accordion-title {
  ul,ol {
    list-style: none;
    @include xy-grid;
  }
  li {
    display:inline;
    @include xy-cell(3);
    text-align:left;
  }
}