.qna { padding: 96px 64px 140px; max-width: 800px; margin: 0 auto; }

.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: oklch(0.98 0.005 250);
  border: 1px solid oklch(0.91 0.01 250);
  border-radius: 12px;
  padding: 8px 24px;
}
.faq-item summary {
  padding: 20px 0;
  font-size: 16px;
  font-weight: 700;
  color: oklch(0.22 0.03 260);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 18px;
  font-size: 20px;
  font-weight: 400;
  color: oklch(0.45 0.14 255);
}
.faq-item[open] summary::after { content: '\2212'; }
.faq-item p {
  font-size: 15px;
  line-height: 1.7;
  color: oklch(0.45 0.02 255);
  margin: 0 0 24px;
}

@media (max-width: 860px) {
  .qna { padding: 64px 20px 96px; }
}