table {
            border-collapse: collapse;
        }
        td {
            position: relative;
            border: 10px solid #ccc;
            box-sizing: border-box;
            cursor: pointer;

        }
        .red-dot::before {
            content: "\1F4DD"; /* 替换为图标符号 */
            position: absolute;
            top: 5px;
            left: 5px;

            z-index: 1;
        }
        .red-dot {
            width: 100px;
            padding-left: 20px; /* 增加左侧内边距 */
        }