body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
}

.wordContainer {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 每行显示4个按钮 */
    gap: 10px;
    justify-content: center;
    width: 80%;
    margin-bottom: 20px;
}

.button {
    padding: 10px;
    border: 1px solid black;
    font-size: 18px;
    text-align: center;
    cursor: pointer;
}