/* 全局优化：禁用触摸高亮、加速渲染、消除卡顿根源 */
  * {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    touch-action: pan-y;
    will-change: transform;
    backface-visibility: hidden;
  }
  #image-track {
    -webkit-overflow-scrolling: touch !important;
    scroll-behavior: smooth !important;
    overflow-scrolling: touch !important;
  }
  /* 关键新增：彻底清除容器的默认边距，强制铺满宽度 */
  body { margin:0 !important; padding:0 !important; width:100% !important; }
  .container-full { width:100vw !important; max-width:100% !important; padding:0 !important; margin:0 !important; }