.product-content-section,
.product-structured {
  box-sizing: border-box;
  max-width: 1280px;
  margin: 28px auto;
}

.product-content-section {
  padding: 28px;
  border: 1px solid #e7ebef;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 28px rgba(20, 46, 70, .07);
}

.product-content-section h2 {
  margin: 0 0 20px;
  color: #174d72;
  font-size: 28px;
}

.product-content-section h3 {
  margin: 0 0 10px;
  color: #173d58;
  font-size: 19px;
}

.product-video-section video,
.product-video-section iframe {
  display: block;
  width: 100%;
  max-height: 720px;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 14px;
  background: #111;
}

.product-content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.product-content-grid article {
  padding: 20px;
  border-radius: 14px;
  background: #f5f8fa;
}

.product-content-grid img,
.product-section-image {
  width: 100%;
  max-height: 420px;
  margin-bottom: 16px;
  border-radius: 12px;
  object-fit: contain;
}

.product-features dl { margin: 0; }
.product-features dl > div {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) 2fr;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid #edf0f2;
}
.product-features dt { color: #667784; }
.product-features dd { margin: 0; color: #172f40; font-weight: 600; }

.product-document-list { display: grid; gap: 10px; }
.product-document-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid #cfe0eb;
  border-radius: 10px;
  color: #14628e;
  text-decoration: none;
}
.product-document-list a:hover { background: #eef7fc; }

@media (max-width: 700px) {
  .product-content-section { margin: 18px 12px; padding: 20px; }
  .product-content-grid { grid-template-columns: 1fr; }
  .product-features dl > div { grid-template-columns: 1fr; gap: 4px; }
}