/* 导航栏容器和响应式布局 */
#nav-group {
    max-width: 1300px;
    width: 100%;
    display: flex;
    align-items: center;
}

@media screen and (min-width: 1300px) {
    #page-header #nav {
        padding: 0 calc((100% - 1300px + 2rem) / 2);
    }
}

@media screen and (max-width: 1300px) {
    #page-header #nav {
        padding: 0 1rem;
    }
}

/* 导航栏基础设置 */
#page-header #nav {
    opacity: 0.95;
    transition: none;
}

/* 导航栏阴影控制 */
#page-header:not(.nav-fixed) #nav {
    box-shadow: none;
    border-bottom: none;
}

#page-header.nav-fixed #nav {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 左侧博客信息区域 */
#page-header #nav #blog-info {
    display: flex;
    overflow: visible;
    z-index: 102;
}

/* 按钮通用样式 */
#page-header #nav #blog-info .back-home-button,
#page-header #nav #nav-right .site-page {
    width: 45px;
    height: 45px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50px;
    transition: .1s;
}

#page-header #nav #blog-info .back-home-button {
    margin-right: 10px;
    border-radius: 15px;
    position: relative;
}

/* 图标字体统一设置 */
#page-header #nav #blog-info .back-home-button .back-home-button-icon,
#page-header #nav #blog-info .back-home-button-icon,
#page-header #nav #nav-right .site-page {
    font-size: 20px;
    line-height: 45px;
}

#page-header #nav #blog-info .back-home-button .back-home-button-icon {
    font-size: 22px;
}

/* 站点标题样式 */
#page-header #nav #blog-info #blog-info-main {
    padding: 0 2px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: .1s;
    border-radius: 50px;
}

#page-header #nav #blog-info #blog-info-main .site-name,
#page-header #nav .site-name {
    font-size: 22px;
    font-weight: 700;
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

#page-header #nav .site-name {
    font-size: 1.5rem;
    line-height: 1;
}

/* 主页图标效果 */
#page-header #nav #blog-info #blog-info-main i {
    position: absolute;
    color: white;
    transition: .1s;
    font-size: 1rem;
    opacity: 0;
}

#page-header #nav #blog-info #blog-info-main:hover i {
    opacity: 1;
}

#page-header #nav #blog-info #blog-info-main:hover .site-name {
    opacity: 0;
}

/* 通用hover效果 */
#page-header #nav #blog-info #blog-info-main:hover,
#page-header #nav #blog-info .back-home-button:hover,
#page-header #nav #nav-right .site-page:hover {
    color: white;
    background: var(--btn-bg);
    transition: .1s;
}

/* 有头图时的半透明背景 */
#page-header.full_page:not(.nav-fixed) #nav #blog-info #blog-info-main:hover,
#page-header.full_page:not(.nav-fixed) #nav #blog-info .back-home-button:hover,
#page-header.full_page:not(.nav-fixed) #nav #nav-right .site-page:hover,
#page-header.full_page:not(.nav-fixed) #nav .menus_items .menus_item:hover,
#page-header.post-bg:not(.nav-fixed) #nav #blog-info #blog-info-main:hover,
#page-header.post-bg:not(.nav-fixed) #nav #blog-info .back-home-button:hover,
#page-header.post-bg:not(.nav-fixed) #nav #nav-right .site-page:hover,
#page-header.post-bg:not(.nav-fixed) #nav .menus_items .menus_item:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 抽屉菜单样式 - 提高背景不透明度 */
#page-header #nav #blog-info .back-home-button .back-menu-list-groups {
    position: absolute;
    left: 0;
    top: 45px;
    font-size: 12px;
    opacity: 0;
    transform: scale(.8);
    transform-origin: top left;
    transition: 0.1s;
    color: #999;
    background-color: rgba(255, 255, 255, 0.95); /* 提高不透明度到95% */
    backdrop-filter: blur(10px); /* 添加背景模糊效果 */
    box-shadow: var(--card-box-shadow);
    border-radius: 12px;
    pointer-events: none;
}

/* 暗色模式下的抽屉菜单背景 */
[data-theme='dark'] #page-header #nav #blog-info .back-home-button .back-menu-list-groups {
    background-color: rgba(18, 18, 18, 0.95); /* 暗色模式：95%不透明度 */
    backdrop-filter: blur(10px);
}

#page-header #nav #blog-info .back-home-button:hover .back-menu-list-groups {
    opacity: 1;
    transform: scale(1);
    top: 55px;
    pointer-events: auto;
}

#page-header #nav #blog-info .back-home-button .back-menu-list-groups::before {
    position: absolute;
    top: -25px;
    left: 0;
    width: 100%;
    height: 30px;
    content: "";
}

/* 抽屉菜单内容 */
#page-header #nav #blog-info .back-home-button .back-menu-list-group {
    display: flex;
    flex-direction: column;
}

#page-header #nav #blog-info .back-home-button .back-menu-list-group .back-menu-list-title {
    margin: 8px 0 0 16px;
    font-size: 16px;
    font-weight: 600;
}

#page-header #nav #blog-info .back-home-button .back-menu-list-group .back-menu-list {
    display: flex;
    width: 340px;
    flex-wrap: wrap;
    flex-direction: row;
    justify-content: space-between;
}

#page-header #nav #blog-info .back-home-button .back-menu-list-groups .back-menu-list-group:last-child .back-menu-list {
    margin: 0 0 8px;
}

/* 抽屉菜单项 */
#page-header #nav #blog-info .back-home-button .back-menu-list .back-menu-item {
    display: flex;
    width: 150px;
    margin: 4px 8px;
    padding: 4px 8px;
    border-radius: 8px;
    align-items: center;
}

#page-header #nav #blog-info .back-menu-list-groups .back-menu-list .back-menu-item .back-menu-item-icon {
    width: 24px;
    height: 24px;
    border-radius: 24px;
    background: white;
}

#page-header #nav #blog-info .back-menu-list-groups .back-menu-list .back-menu-item .back-menu-item-text {
    font-size: 16px;
    color: var(--font-color);
    margin-left: .5rem;
    white-space: nowrap;
}

#page-header #nav #blog-info .back-menu-list a:hover {
    background: var(--text-bg-hover);
}

#page-header #nav #blog-info .back-home-button .back-menu-list a:hover .back-menu-item-text {
    color: white;
}

/* 右侧搜索区域 */
#page-header #nav #nav-right {
    display: flex;
    flex: 1;
    justify-content: flex-end;
    align-items: center;
    z-index: 102;
}

#page-header #nav #nav-right .site-page {
    display: block;
    text-align: center;
}

/* 清除右侧按钮下划线效果 */
#page-header #nav #nav-right .site-page:hover:after {
    width: 0;
}

/* 中间菜单样式 */
#page-header #nav .menus_items {
    font-weight: 700;
    font-size: 18px;
}

#page-header #nav .menus_items .menus_item {
    margin: 0 2px;
    padding: 0 15px;
    transition: .1s;
    border-radius: 5px;
}

#page-header #nav .menus_items .menus_item a.site-page {
    font-size: 1.3rem;
    letter-spacing: 5px;
    transition: .1s;
    position: relative;
    padding: 0 0 0 5px;
}

/* 菜单项hover效果 */
#page-header #nav .menus_items .menus_item:hover {
    background: var(--btn-bg);
    border-radius: 10px;
    transition: .1s;
}

#page-header #nav .menus_items .menus_item:hover a.site-page {
    color: white;
}

/* 移除菜单项下划线 */
#page-header #nav .menus_items .menus_item a.site-page::after,
#page-header #nav .menus_items .menus_item a.site-page:hover::after {
    display: none;
}

/* 移动端设置 */
#page-header #nav.hide-menu .menus_items {
    display: none;
}

/* 二级菜单横向排布 */
.menus_item_child li:not(#sidebar-menus li) {
    float: left;
}

.menus_item_child:not(#sidebar-menus ul) {
    left: 50%;
    translate: -50%;
}

/* 特殊状态修正 */
#page-header.not-top-img #nav .back-home-button {
    color: var(--font-color);
}

#page-header.nav-fixed #nav #blog-info:hover {
    color: inherit;
}

#page-header.nav-fixed #nav #blog-info > a:last-child {
    display: flex;
}