@layer utilities {
      .content-auto {
        content-visibility: auto;
      }
      .text-shadow-sm {
        text-shadow: 0 1px 2px rgba(0,0,0,0.05); /*文字轻阴影，更立体*/
      }
      .card-scale {
        transition: all 0.3s ease; /*卡片缩放动效*/
      }
      .card-scale:hover {
        transform: translateY(-6px); /*上移+缩放，更灵动*/
      }
    }