.inquiry-form .rfq-optional-details {
  border: 1px solid #cfc9be;
  border-radius: 7px;
  background: #fff;
}

.inquiry-form .rfq-optional-details summary {
  display: grid;
  gap: 3px;
  position: relative;
  padding: 16px 48px 16px 18px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.inquiry-form .rfq-optional-details summary::-webkit-details-marker {
  display: none;
}

.inquiry-form .rfq-optional-details summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  translate: 0 -50%;
  color: var(--teal);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

.inquiry-form .rfq-optional-details[open] summary::after {
  content: "−";
}

.inquiry-form .rfq-optional-details summary span {
  font-size: 14px;
  font-weight: 900;
  line-height: 1.4;
}

.inquiry-form .rfq-optional-details summary small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
}

.inquiry-form .rfq-optional-details[open] summary {
  border-bottom: 1px solid var(--line);
}

.inquiry-form .rfq-optional-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 18px;
}

@media (max-width: 760px) {
  .inquiry-form .rfq-optional-grid {
    grid-template-columns: 1fr;
  }
}