/* 侧边栏基础样式 */
.k8-sidebar {
    position: fixed;
    top: var(--k8-header-height);
    left: 0;
    bottom: 0;
    width: 240px;
    background: var(--k8-bg-white);
    border-right: 1px solid var(--k8-border-color);
    z-index: 999;
    transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    transform: translateX(-100%); /* 默认隐藏 */
    overflow: hidden; /* 防止子菜单溢出 */
}

/* 菜单切换按钮样式 */
.k8-menu-toggle {
    position: relative;
    width: var(--k8-header-height);
    height: var(--k8-header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    color: var(--k8-text-color);
    transition: all 0.2s;
}

.k8-menu-toggle:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.k8-menu-toggle.active {
    color: var(--primary-color);
    background: var(--primary-light);
}

/* 菜单按钮的线条基础样式 */
.k8-menu-toggle__line-first,
.k8-menu-toggle__line,
.k8-menu-toggle__line-last {
    position: absolute;
    left: 50%;
    width: 20px;
    height: 2px;
    background: var(--k8-text-color);
    border-radius: 1px;
    transform-origin: center;
    transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* 三条线的位置 */
.k8-menu-toggle__line-first {
    transform: translate(-50%, -6px);
}

.k8-menu-toggle__line {
    transform: translate(-50%, 0);
}

.k8-menu-toggle__line-last {
    transform: translate(-50%, 6px);
}

/* 只在激活状态下显示动画效果 */
.k8-menu-toggle.active .k8-menu-toggle__line-first {
    transform: translate(-50%, 0) rotate(45deg);
    background: var(--primary-color);
}

.k8-menu-toggle.active .k8-menu-toggle__line {
    opacity: 0;
    transform: translate(-50%, 0) scale(0);
    background: var(--primary-color);
}

.k8-menu-toggle.active .k8-menu-toggle__line-last {
    transform: translate(-50%, 0) rotate(-45deg);
    background: var(--primary-color);
}

/* 侧边栏收缩状态 */
.k8-sidebar.collapsed {
    width: 60px;
}

.k8-sidebar.collapsed .k8-menu-item span,
.k8-sidebar.collapsed .k8-menu-header,
.k8-sidebar.collapsed .k8-submenu-arrow {
    display: none;
}

.k8-sidebar.collapsed .k8-menu-item {
    padding: 12px 0;
    justify-content: center;
}

.k8-sidebar.collapsed .k8-menu-item i {
    margin: 0;
    font-size: 20px;
}

.k8-sidebar-inner {
    position: relative;
    height: 100%;
    overflow: visible;
}

/* 菜单基础样式 */
.k8-menu {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: transform 0.3s ease;
    background: var(--k8-bg-white);
    transform: translateX(0); /* 默认位置 */
    overflow-y: auto; /* 添加滚动条 */
}

/* 菜单切换状态 */
.k8-menu-main {
    transform: translateX(0);
}

.k8-menu-sub {
    transform: translateX(100%); /* 初始隐藏在右侧 */
}

.k8-menu-third {
    transform: translateX(100%); /* 初始隐藏在右侧 */
}

/* 激活状态 */
.k8-menu-main.hidden {
    transform: translateX(-100%); /* 向左隐藏 */
}

.k8-menu-sub.active {
    transform: translateX(0); /* 显示二级菜单 */
}

.k8-menu-third.active {
    transform: translateX(0); /* 显示三级菜单 */
}

.k8-menu-sub.hidden {
    transform: translateX(-100%); /* 向左隐藏二级菜单 */
}

/* 菜单头部样式 */
.k8-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--k8-border-color);
    border-bottom: 1px solid var(--k8-border-color);
    background: var(--k8-bg-white);
    padding: 16px;
}

/* 菜单标题 */
.k8-menu-title {
    position: relative;
    font-weight: 600;
    color: var(--k8-text-color);
    font-size: 15px;
    padding-left: 12px;
    line-height: 1.4;
    flex: 1;
}

/* 标题左侧装饰线 */
.k8-menu-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 返回按钮样式 */
.k8-menu-back {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--k8-text-color);
    background: var(--primary-light);
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
    margin-left: 8px;
    font-size: 18px;
}

.k8-menu-back:hover {
    color: var(--primary-color);
}

/* 箭头和徽章 */
.k8-submenu-arrow {
    margin-left: auto;
    font-size: 20px;
    opacity: 0.6;
}

/* 站内信提示数量样式 */
.k8-message-badge {
    margin-left: auto;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    background: var(--danger-color);
    color: #fff;
    font-size: 12px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
}

/* 导航栏站内信提示数量 */
.k8-nav-message-badge {
    position: absolute;
    top: 0;
    right: 0;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    background: var(--danger-color);
    color: var(--k8-badge-text);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(50%, -50%);
    border-radius: 8px;
    font-weight: 500;
}

/* 滚动条样式 */
.k8-sidebar-inner::-webkit-scrollbar {
    width: 6px;
}

.k8-sidebar-inner::-webkit-scrollbar-thumb {
    background: var(--k8-fill-3);
    border-radius: 3px;
}

.k8-sidebar-inner::-webkit-scrollbar-track {
    background: transparent;
}

/* 遮罩层样式 */
.k8-sidebar-mask {
    position: fixed;
    top: var(--k8-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 998;
    visibility: hidden;
    opacity: 0;
    transition: visibility 0s 0.2s, opacity 0.2s linear;
    pointer-events: none;
}

/* 显示遮罩层 */
.k8-sidebar.show ~ .k8-sidebar-mask {
    visibility: visible;
    opacity: 1;
    transition: visibility 0s, opacity 0.2s linear;
    pointer-events: auto;
}

/* 显示侧边栏 */
.k8-sidebar.show {
    transform: translateX(0);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .k8-sidebar {
        transform: translateX(-100%);
    }
    
    .k8-sidebar.show {
        transform: translateX(0);
        width: 240px !important;
    }

    .k8-sidebar.show .k8-menu-item span,
    .k8-sidebar.show .k8-menu-header,
    .k8-sidebar.show .k8-submenu-arrow {
        display: flex !important;
    }

    .k8-sidebar.show .k8-menu-item {
        padding: 12px 16px !important;
        justify-content: flex-start !important;
    }
}

.k8-menu-main .k8-menu-item {
    position: relative;
}

.k8-menu-main .k8-menu-item:hover::before,
.k8-menu-main .k8-menu-item.submenu-active::before,
.k8-menu-main .k8-menu-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary-color);
}

/* 移除旧的内嵌菜单样式 */
.k8-submenu-content,
.k8-third-content {
    display: none;
}

/* 内嵌二级菜单样式 */
.k8-submenu-content {
    display: none; /* 默认隐藏 */
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.k8-submenu-content.active {
    display: block;
    max-height: 1000px; /* 足够大的高度以容纳所有菜单项 */
}

.k8-menu-item.k8-submenu-item {
    padding-left: 32px; /* 二级菜单缩进 */
}

/* 内嵌三级菜单样式 */
.k8-third-content {
    display: none; /* 默认隐藏 */
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.k8-third-content.active {
    display: block;
    max-height: 1000px;
}

.k8-menu-item.k8-third-item {
    padding-left: 48px; /* 三级菜单缩进 */
}

/* 旋转箭头动画 */
.k8-menu-item.active > .k8-submenu-arrow {
    transform: rotate(180deg);
    transition: transform 0.3s ease;
}

/* 菜单项样式 */
.k8-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--k8-text-color);
    text-decoration: none;
    transition: all 0.2s;
}

.k8-menu-item:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.k8-menu-item.active {
    color: var(--primary-color);
    background: var(--primary-light);
}

/* 一级菜单项悬停和激活状态 */
.k8-menu-main .k8-menu-item:hover,
.k8-menu-main .k8-menu-item.submenu-active {
    color: var(--primary-color);
    background: var(--primary-light);
}

.k8-menu-main .k8-menu-item:hover .k8-submenu-arrow,
.k8-menu-main .k8-menu-item.submenu-active .k8-submenu-arrow {
    opacity: 1;
    color: var(--primary-color);
}

.k8-menu-item i {
    font-size: 18px;
    flex-shrink: 0;
}

/* 默认圆点图标样式 */
.k8-menu-item .ri-checkbox-blank-circle-fill {
    font-size: 8px;
    opacity: 0.6;
}

.k8-menu-item:hover .ri-checkbox-blank-circle-fill {
    opacity: 1;
}

.k8-menu-item.active .ri-checkbox-blank-circle-fill {
    opacity: 1;
}

.k8-menu-item span {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}