.resizable::after {
    content: "";
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 10px;
    height: 10px;
    border-top: 2px solid #000;
    border-right: 2px solid #000;
    transform: translate(50%, 50%) rotate(90deg);
    cursor: se-resize; /* 改变鼠标形状，表示可拉伸 */
}

.work-number {
    height: 30px;
    text-align: center;
    transition: background-color 2s; /* 定义过渡效果，2秒 */
}

.work-number.active {
    background-color: lightgreen; /* 鼠标悬停时的背景颜色 */
}