.anyrtc-board {
  position: relative;
  overflow: auto;
}
.anyrtc-board__view {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  white-space: nowrap;
  overflow: hidden;
  z-index: -1;
}

.anyrtc-board__bg {
  width: 100%;
  height: 100%;
  transition: transform .3s;
  font-size: 0;
}

.anyrtc-board__bg_item {
  display: inline-block;
  vertical-align: top;
  width: 100%;
  height: 100%;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

.anyrtc-board__canvas {
  width: 100%;
  height: 100%;
}

.anyrtc-board__loading {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255,255,255,.9);
  text-align: center;
}

.anyrtc-board__loading_svg {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -12px;
  margin-right: -20px;
 }