.course-detail-info { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
.course-detail-info dt { color: var(--color-text-light); font-size: 0.85rem; }
.course-detail-info dd { font-weight: 600; margin-bottom: 0.75rem; }
.course-content { line-height: 1.8; }
.sidebar-course-item { display: flex; gap: 0.85rem; padding: 0.85rem 0; border-bottom: 1px solid var(--color-border); }
.sidebar-course-item .placeholder-img { width: 72px; height: 54px; aspect-ratio: auto; flex-shrink: 0; border-radius: 6px; font-size: 1.2rem; }
.sidebar-course-item:last-child { border-bottom: none; }