/* 布局修正 */
#container {
    min-height: 100vh;
    overflow: hidden;
}
.quiz-container {
    margin-left: 220px;
    padding: 20px;
    transition: margin-left 0.3s;
}
.progress-bar {
    height: 10px;
    background: #f0f0f0;
    margin-bottom: 20px;
}
.progress {
    height: 100%;
    background: #4CAF50;
}