/* 基础样式 */
body {
    font-family: 'Segoe UI', '微软雅黑', sans-serif;
    background: #f5f7fa;
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}
.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
/* 按钮样式 */
#generateBtn {
    display: block;
    width: 200px;
    margin: 0 auto 30px;
    padding: 12px 24px;
    font-size: 18px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}
#generateBtn:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,123,255,0.3);
}
/* 题目区域 */
.question-box {
    min-height: 200px;
    padding: 20px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: #f8f9fa;
}
#questionText {
    font-size: 20px;
    white-space: pre-wrap;
    margin: 15px 0;
}

/* 加载动画 */
.loader {
    width: 30px;
    height: 30px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 50px auto;
    display: none;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}