/* 平板设备 */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .game-info {
        flex-direction: column;
        gap: 5px;
    }

    .game-board {
        grid-template-columns: repeat(3, 1fr);
        max-width: 400px;
    }

    .card {
        font-size: 1.5rem;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .game-controls {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 80%;
        margin-bottom: 10px;
    }

    .game-board {
        grid-template-columns: repeat(2, 1fr);
        max-width: 300px;
    }

    .card {
        font-size: 1.2rem;
    }
}

/* 超小屏幕设备 */
@media (max-width: 320px) {
    h1 {
        font-size: 1.5rem;
    }

    .game-board {
        gap: 5px;
    }
}