body {
    font-family: 'Roboto', sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

.my-container {
    max-width: 800px;
    margin: 40px auto;
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #007BFF;
}

.question {
    margin: 20px 0;
}

button {
    padding: 10px 20px;
    margin: 10px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s; /* 添加过渡效果 */
}

button:hover {
    background-color: #0056b3;
}

.response {
    margin-top: 20px;
    font-weight: bold;
    color: #555;
}

.next {
    display: block;
    margin: 20px auto;   /* 上下外边距为20px，左右自动居中 */
}