/* 遮罩层 */
    .overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.5);
      display: none; /* 默认隐藏 */
      align-items: center;
      justify-content: center;
      z-index: 9999;
    }

    /* 弹框主体 */
    .custom-alert {
      background: #fff;
      border-radius: 6px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.3);
      text-align: center;
      min-width: 320px;
      max-width: 480px;
      animation: fadeIn 0.3s ease;
    }

    .custom-alert h3 {
      margin: 0 0 10px;
      font-size: 18px;
      color: #333;
      padding: 20px 0px 0px 0px;
    }

    .custom-alert p {
      font-size: 16px;
      color: #666;
    /*  margin: 0 0 15px; */
    }

    .custom-alert button {
      padding: 16px 0px 16px 0px;
      border: none;
      border-radius: 0px 0px 6px 6px;
      background: #fff;
      color: #000;
      font-size: 16px;
      cursor: pointer;
      width: 100%;
      border-top :1px solid #efefef;
    }
    
    
    /* 动画 */
    @keyframes fadeIn {
      from { transform: scale(0.8); opacity: 0; }
      to { transform: scale(1); opacity: 1; }
    }