message: fix: svg bug when roaming with bmap
diff: @@ -96,12 +96,13 @@ var SVGPainter = function (root, storage, opts) {
  svgRoot.setAttribute('version', '1.1');
  svgRoot.setAttribute('baseProfile', 'full');
  svgRoot.style['user-select'] = 'none';
  + svgRoot.style.cssText = 'position:absolute;left:0;top:0;';
  this.gradientManager = new GradientManager(svgRoot);
  this.clipPathManager = new ClippathManager(svgRoot);
  var viewport = document.createElement('div');
  - viewport.style.cssText = 'overflow: hidden;';
  + viewport.style.cssText = 'overflow:hidden;position:relative';
  this._svgRoot = svgRoot;
  this._viewport = viewport;
  