/* 全局样式 */
body {
  margin: 0;
  overflow: hidden;
  background: #1a1a1a;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

canvas {
  display: block;
}

/* 底部操作提示 */
#info {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  background: rgba(0, 0, 0, 0.6);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  pointer-events: none;
  backdrop-filter: blur(5px);
}

/* 加载提示 */
#loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  font-size: 18px;
  background: rgba(0, 0, 0, 0.7);
  padding: 12px 24px;
  border-radius: 30px;
  transition: opacity 0.5s;
}