/* 分类折叠指示器 */
.collapse-indicator {
    margin-left: 8px;
    font-size: 0.75rem;
    color: var(--bs-secondary-color, #94a3b8);
    transition: transform 0.3s;
    display: inline-block;
}

.category-title.collapsed .collapse-indicator {
    transform: rotate(-90deg);
}

.category-title {
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s;
    display: inline-flex;
    align-items: center;
}

.category-title:hover {
    opacity: 0.7;
}