body {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #2c3e50; /* 页面背景色，与所有方块颜色不同 */
}

#header {
    position: absolute;
    top: 10px;
    right: 10px;
    text-align: right;
    font-size: 20px;
    color: white;
}

#game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(10, 50px); /* 调整以适应30对 */
    gap: 5px;
    margin-top: 50px; /* 为标题留出空间 */
}

#control-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}

.game-item {
    width: 50px;
    height: 50px;
    cursor: pointer;
}

.selected {
    border: 3px solid red;
}