/* メインセクション背景 */
body {
  background-color: #6fa4c3;
}
.section-heading {
  font-size: 1.25rem; /* 20pt */
  color: #6d6c6c;
  border-bottom: 1px dotted #6d6c6c;
  margin-bottom: 20px;
}
.quality-section {
  width: 900px;
  /*height: 437px;*/
  background-color: #e3f5ff;
  border-radius: 10px;
  padding: 20px;
  box-sizing: border-box;
}
.quality-title {
  background-color: #ffffff;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 1.125rem; /* 18pt ≒ 1.125rem */
  color: #0072c6; /* 青文字にする場合 */
  margin-bottom: 20px;
}
.quality-text {
  font-size: 0.9375rem; /* 15pt ≒ 0.9375rem */
  color: #6d6c6c;
  line-height: 1.6;
  margin-bottom: 20px;
}
.quality-images {
  display: flex;
  justify-content: start;
  gap: 25px;
}
.quality-images img {
  object-fit: cover;
  background-color: #fff;
    max-width: 100%;
}
/* ------------------------------
   レスポンシブ対応 (768px以下)
---------------------------------*/
@media (max-width: 768px) {
  .quality-section {
    width: 90%;
    height: auto;
    padding: 15px;
  }
  .quality-title {
    font-size: 1rem;
    padding: 8px 15px;
    margin-bottom: 15px;
  }
  .quality-text {
    font-size: 0.875rem;
    margin-bottom: 15px;
  }
  .quality-images {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }
  .quality-images img {
    max-width: 100%;
    height: auto;
  }
  .section-heading {
    font-size: 1.125rem;
    margin-bottom: 15px;
  }
}
/* ------------------------------
   レスポンシブ対応 (480px以下)
---------------------------------*/
@media (max-width: 480px) {
  .quality-section {
    width: 95%;
    padding: 10px;
  }
  .quality-title {
    font-size: 0.95rem;
    padding: 6px 10px;
  }
  .quality-text {
    font-size: 0.8rem;
    line-height: 1.5;
  }
  .quality-images img {
    width: 100%;
  }
  .section-heading {
    font-size: 1rem;
  }
}