body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding: 10px;
    background-color: #f0f0f0;
}

h1 {
    margin: 10px 0;
}

#info {
    display: flex;
    justify-content: space-between;
    width: 80%;
    max-width: 400px;
    margin-bottom: 10px;
    font-size: 18px;
}

#board {
    display: grid;
    gap: 2px;
}

.cell {
    background-color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    user-select: none;
    border-radius: 5px;
    aspect-ratio: 1 / 1; /* 自动保持正方形 */
}

.cell.revealed {
    background-color: #eee;
}

.cell.flagged {
    background-color: #f99;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    margin-bottom: 10px;
}

/* 手机自适应 */
@media (max-width: 500px) {
    .cell {
        font-size: 1rem;
    }
}