/* ============================================================
   COA 证书墙 — 真实检测报告缩略图卡片
   ============================================================ */

.cert-grid {
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 24px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all .25s ease;
  text-align: center;
  padding-bottom: 18px;
}
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.cert-image-preview {
  position: relative;
  height: 240px;
  overflow: hidden;
  background: #F4F7F9;
}
.cert-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform .35s ease;
}
.cert-card:hover .cert-thumbnail { transform: scale(1.05); }

.cert-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 37, 64, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .25s ease;
}
.cert-card:hover .cert-overlay { opacity: 1; }
.cert-overlay .zoom-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .92);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.cert-card .ct-badge {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  color: var(--deep);
  margin: 16px 0 8px;
}
.cert-card .cert-link-button {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.cert-card:hover .cert-link-button { color: var(--accent); }

/* 灯箱：展示完整报告大图 */
.lightbox { max-width: 880px !important; }
.lightbox .lb-visual {
  height: auto !important;
  max-height: 68vh;
  overflow-y: auto;
  background: #F4F7F9 !important;
  padding: 10px;
  border-radius: var(--radius-sm);
  display: block !important;
}
.lightbox .lb-visual img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

@media (max-width: 1024px) {
  .cert-grid { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 720px) {
  .cert-grid { grid-template-columns: 1fr !important; }
  .cert-image-preview { height: 300px; }
  .lightbox .lb-visual { max-height: 60vh; }
}