bootstrap/lib/accordion.less

// ACCORDION
// ---------

.accordion {
  margin-bottom: @baseLineHeight;
}

.accordion-group {
  background-color: #f5f5f5;
  .border-radius(4px);
}
.accordion-heading {
  padding: 8px 15px;
  border-bottom: 0;
}

.accordion-body {
  margin: 0 0 2px;
}

.accordion-inner {
  padding: 9px 15px;
  border-top: 1px solid #e5e5e5;
}

.accordion .in {
  margin-bottom: @baseLineHeight / 2;
}