body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.puzzle-container {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 5px;
    touch-action: none; /* 禁用默认触摸行为 */
}

.puzzle-piece {
    width: 100px;
    height: 100px;
    cursor: pointer;
    user-select: none;
}