/* 横屏提示 - 竖屏时显示 */
@media screen and (orientation: portrait) {
  body::before {
    content: "请将设备旋转至横屏模式";
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: #0a0a1a;
    display: flex; justify-content: center; align-items: center;
    z-index: 9999;
    color: #ffd700;
    font-size: 18px;
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(255,215,0,0.5);
  }
  #game-wrapper, #selection-overlay { display: none !important; }
}