#ucStage{ position:relative; display:inline-block; max-width:100%; line-height:0; touch-action:none; -webkit-user-select:none; user-select:none; }
          #ucCanvas{ max-width:100%; display:block; border-radius:10px; border:1px solid #e5e9f0; background:#0b1220; }
          #ucSel{ position:absolute; border:2px solid #1e5a9e; box-shadow:0 0 0 9999px rgba(15,23,42,.5); box-sizing:border-box; cursor:move; display:none; }
          #ucSel .uch{ position:absolute; width:14px; height:14px; background:#fff; border:2px solid #1e5a9e; border-radius:50%; box-sizing:border-box; }
          #ucSel .uch[data-h="nw"]{ left:-8px; top:-8px; cursor:nwse-resize; }
          #ucSel .uch[data-h="ne"]{ right:-8px; top:-8px; cursor:nesw-resize; }
          #ucSel .uch[data-h="sw"]{ left:-8px; bottom:-8px; cursor:nesw-resize; }
          #ucSel .uch[data-h="se"]{ right:-8px; bottom:-8px; cursor:nwse-resize; }