/* 导航容器 */
.navigation {
    z-index: 1000;
}

/* 收缩状态 */
.navigation.collapsed {
    
}

.navigation.collapsed .menu-text {
    display: none;
}

.navigation.collapsed .arrow {
    display: none;
}

.navigation.collapsed .submenu {
    display: none !important;
}

/* 主菜单样式 */
.main-menu {
    list-style: none;
    padding: .5rem 0;
}

/* 导航项基础样式 */
.nav-item {
    position: relative;
    width: 100%;
}

/* 导航链接样式 */
.nav-link {
    display: flex;
    align-items: center;

    text-decoration: none;
    transition: all 0.3s ease;
    margin: 0.01rem 0.75rem;
    border-radius: 8px;
    border-color:red;
    position: relative;
    cursor: pointer;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(5px);
}

/* 菜单文本样式 */
.menu-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 箭头图标样式 */
.arrow {
    transition: transform 0.3s ease;
    font-size: 0.8rem;
}

/* 子菜单基础样式 */
.submenu {
    list-style: none;
    margin: 0.01rem 0.75rem;
    border-radius: 8px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    max-height: 0;
    border: 1px solid #ededed;
}

/* 各级子菜单定位 */
.submenu.level-1 {
    
}

.submenu.level-2 {
    
}

.submenu.level-3 {
    
}

/* 子菜单项样式 */
.submenu .nav-item {
    width: 100%;
}

.submenu .nav-link {

    background: transparent;
    margin: 0;
    border-radius: 0;
}

.submenu .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(3px);
}

/* 展开状态 */
.submenu.expanded {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    max-height: 1000px;
}

/* 箭头旋转动画 */
.arrow.rotated {
    transform: rotate(90deg);
    color:red;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navigation {
       
    }
    
    .navigation.collapsed {
       
    }
    
    .nav-link {
        padding: 0.01rem 1rem;
    }
    
    .submenu .nav-link {
        padding: 0.01rem .5rem 0.5rem 1rem;
    }
}

/* 超小屏幕适配 */
@media (max-width: 480px) {
    .navigation {
    }
    
    .navigation.collapsed {
        
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
    
    .main-content {
        margin-left: 50px;
    }
}