body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-image: url("../static/img/bg_circles.png");
    background-repeat: repeat;
}
#chat-container {
    width: 80%; /* 使用百分比宽度 */
    max-width: 1300px; /* 最大宽度，防止界面变得过宽 */
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
#chat-messages {
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    background-color: #f9f9f9;
    word-wrap: break-word; /* 自动换行 */
    white-space: pre-wrap; /* 保留空格并自动换行 */
}
.message-divider {
    border-top: 1px solid #ccc;
    margin: 10px 0;
}
#user-input {
    width: 97%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-top: 10px;
}
#user-input:focus {
    outline: none;
}
#user-input::placeholder {
    color: #999;
}
#user-input-button {
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    margin-top: 10px;
    cursor: pointer;
}
#user-input-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}
/* 新增样式 */
#additional-controls {
    display: flex;
    align-items: center;
    justify-content: space-between; /* 左右对齐 */
    margin-top: 10px;
}
#additional-controls input[type="checkbox"] {
    margin-right: 10px;
}
#additional-controls button {
    background-color: #466d2b;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    cursor: pointer;
}