.bili-columns {
  container-type: inline-size;
  container-name: pb-columns;
  display: grid;
  gap: var(--sp-4, 16px);
  align-items: start;
  grid-template-columns: 1fr;
}

.bili-columns__col {
  container-type: inline-size;
  container-name: pb-col;
  min-width: 0;
}

/* 视口回退：PC 预览 iframe 1920px 等场景下 container query 可能不触发 */
@media (min-width: 721px) {
  .bili-columns {
    grid-template-columns: var(--pb-cols, 1fr);
  }
}

@container pb-columns (min-width: 720px) {
  .bili-columns {
    grid-template-columns: var(--pb-cols, 1fr);
  }
}

@media (max-width: 720px) {
  .bili-columns {
    grid-template-columns: 1fr !important;
  }
}

@container pb-columns (max-width: 719px) {
  .bili-columns {
    grid-template-columns: 1fr !important;
  }
}

/* Page Builder 预览：空栏位占位（线上无 pb-preview-mode，不生效） */
body.pb-preview-mode .pb-block-host[data-pb-component="columns"] {
  display: block;
  min-height: 160px;
}

body.pb-preview-mode .pb-block-host[data-pb-component="columns"] .bili-columns {
  min-height: 148px;
  align-items: stretch;
}

body.pb-preview-mode .bili-columns__col.pb-col-empty {
  min-height: 140px;
  border: 1px dashed rgba(64, 204, 146, 0.45);
  border-radius: 8px;
  background: rgba(64, 204, 146, 0.06);
  position: relative;
  box-sizing: border-box;
}

body.pb-preview-mode .bili-columns__col.pb-col-empty::after {
  content: attr(data-pb-col-hint);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-size: 12px;
  line-height: 1.45;
  color: #64748b;
  font-family: system-ui, sans-serif;
  pointer-events: none;
}