body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
}

.container {
    max-width: 600px;
    width: 100%;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

input {
    margin: 10px 0;
    padding: 10px;
    width: calc(100% - 22px);
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    padding: 10px;
    width: calc(100% - 22px);
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
    transition: background-color 0.3s ease;
}

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

textarea {
    width: calc(100% - 22px);
    height: 200px;
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: none;
    box-sizing: border-box;
    font-size: 16px; /* 增大字体 */
    font-family: 'Times New Roman', Times, serif;
    background-color: #f9f9f9;
}

#copyButton {
    background-color: #28a745;
    margin-top: 20px;
}

#copyButton:hover {
    background-color: #218838;
}

#loading {
    font-size: 16px;
    color: #007bff;
    margin-top: 20px;
}

.hidden {
    display: none;
}

footer {
    margin-top: 20px;
    font-size: 14px;
}

footer a {
    color: #007bff;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}