/**
 * 左侧菜单底部收起/展开按钮
 * 参考万企帮侧边栏：底部居右、汉堡线 + 小箭头
 */
.main-sidebar .sidebar {
    display: flex;
    flex-direction: column;
    padding-bottom: 0;
}

.main-sidebar .sidebar .sidebar-content {
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.main-sidebar .sidebar .sidebar-footer {
    flex-shrink: 0;
    padding: 12px 15px 14px;
    text-align: right;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    /* 默认隐藏，JS 在 fixSidebar 设置好高度后再显示，避免布局闪烁 */
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
.main-sidebar .sidebar .sidebar-footer.sidebar-footer--ready {
    visibility: visible;
    opacity: 1;
}

.main-sidebar .sidebar .sidebar-footer-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 36px;
    height: 32px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.main-sidebar .sidebar .sidebar-footer-toggle:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.main-sidebar .sidebar .sidebar-footer-toggle .fa-bars {
    font-size: 16px;
}

.main-sidebar .sidebar .sidebar-footer-toggle .sidebar-collapse-arrow {
    position: absolute;
    right: 4px;
    bottom: 6px;
    font-size: 10px;
    opacity: 0.9;
}

/* 展开时显示左箭头（点击收起），收起时显示右箭头（点击展开） */
.main-sidebar .sidebar .sidebar-footer-toggle .sidebar-collapse-arrow--expand {
    display: none;
}
body.sidebar-collapse .sidebar-footer-toggle .sidebar-collapse-arrow--collapse {
    display: none;
}
body.sidebar-collapse .main-sidebar .sidebar .sidebar-footer-toggle .sidebar-collapse-arrow--expand {
    display: inline-block;
}

/* 收起态：切换按钮固定在底部，不随内容滚动 */
.sidebar-mini.sidebar-collapse .main-sidebar .sidebar {
    position: relative;
}

.sidebar-mini.sidebar-collapse .main-sidebar .sidebar .sidebar-content {
    padding-bottom: 50px; /* 为底部按钮预留空间，避免最后一项被遮挡 */
}

.sidebar-mini.sidebar-collapse .main-sidebar .sidebar .sidebar-footer {
    padding: 11px 0 8px;
    text-align: center;
}

.sidebar-mini.sidebar-collapse .main-sidebar .sidebar .sidebar-footer-toggle .sidebar-collapse-arrow {
    /* 收起时也保持箭头在右下角，与展开时一致 */
    position: absolute;
    right: 4px;
    bottom: 6px;
    margin-left: 0;
    font-size: 9px;
}