/* ===== 3D GRAPH STYLES (Three.js WebGL) ===== */

/* 3D操作提示 */
#ga::after {
  content: "鼠标左键旋转 · 右键平移 · 滚轮缩放";
  position: absolute;
  bottom: 10px;
  right: 10px;
  z-index: 10;
  font-size: 11px;
  color: var(--text3);
  background: rgba(13,17,23,0.7);
  padding: 3px 8px;
  border-radius: 3px;
  pointer-events: none;
}

/* 2D模式提示覆盖 */
#ga.mode-2d::after {
  content: "拖拽节点 · 滚轮缩放";
}

/* 2D SVG样式 */
#ga svg.g2d {
  background: var(--bg);
}

/* Tooltip增强 */
#tt {
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}