body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;

    overflow: hidden; /* 禁用滚动 */
}

.container {
    text-align: center;
}

#timer {
    font-size: 48px;
    color: #333;
    margin: 20px 0;
    letter-spacing: 2px;
}

.buttons button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

.buttons button:hover {
    background-color: #45a049;
}