/* Journal Home Header & Footer Styles */

/* 面包屑导航样式 - 通用组件 */
.breadcrumb-nav {
    margin-bottom: 20px;
    padding: 0;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
    list-style: none;
    background-color: transparent;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    padding: 0 8px;
    color: #6c757d;
    font-weight: normal;
}

.breadcrumb-item a {
    color: #2563eb;
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb-item a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: #6c757d;
}

.breadcrumb-item.active span {
    color: #6c757d;
}

/* 顶部 Journal Header 区块（蓝色条，仅标题） */
.journal-header-bar {
    background-color: #002b5c; /* 深蓝色，接近截图 */
    padding: 20px 0;
}

.journal-header-container {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
}

.journal-header-left {
    flex: 1 1 50%;
    min-width: 260px;
}

.journal-page-title {
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    margin: 0 ;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

/* Home 链接与分隔符 */
.journal-home-link {
    font-size: 14px;
    font-weight: 500;
    color: #ffffff;
    text-decoration: none;
    margin-right: 6px;
}

.journal-home-link:hover {
    text-decoration: underline;
}

.journal-title-separator {
    margin-right: 6px;
    color: #ffffff;
}

/* Journal 导航外层白色条，位置同截图红框（白底） */
.journal-nav-bar {
    background-color: #ffffff;
    border-bottom: 1px solid #dde3f0;
    padding: 15px 0;
}

/* Journal 导航条（在白色条内部） */
.journal-nav {
    background-color: transparent;
    padding: 0;
    margin-top: 0;
}

.journal-nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start; /* 改为左对齐 */
    gap: 30px;
}

.journal-nav-menu li {
    margin: 0;
    position: relative; /* 作为子菜单定位参考 */
}

/* 期刊缩写（导航第一个项）稍微收紧左右间距 */
.journal-nav-journal-home > a {
    padding-bottom: 6px;
    font-weight: 700;
}

.journal-nav-menu a {
    display: inline-flex;
    align-items: center;
    padding: 0 0 6px 0;
    font-size: 20px;
    font-weight: 600;
    color: #000000;
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
}

.journal-nav-menu a:hover,
.journal-nav-menu a:focus {
    color: #c42021;
    border-bottom-color: #c42021;
}

/* 顶级不可点击栏目标签，样式与链接一致但无下划线效果 */
.journal-nav-label {
    display: inline-flex;
    align-items: center;
    padding: 0 0 6px 0;
    font-size: 20px;
    font-weight: 600;
    color: #000000;
    white-space: nowrap;
}

/* 顶级带子菜单的箭头图标 */
.journal-nav-arrow {
    display: inline-block;
    margin-left: 6px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid #666666;
    position: relative;
    top: 1px; /* 轻微下移，让视觉上与文字居中 */
    transition: transform 0.2s ease, border-top-color 0.2s ease;
}

.journal-nav-menu li.has-children:hover .journal-nav-arrow,
.journal-nav-menu li.has-children:focus-within .journal-nav-arrow {
    transform: rotate(180deg);
    border-top-color: #c42021;
}

/* 二级子栏目（简单纵向列表） */
.journal-nav-submenu {
    list-style: none;
    margin: 0;
    padding: 6px 0;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 190px;
    background-color: #ffffff;
    border: 1px solid #dde3f0;
    border-radius: 4px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.12);
    z-index: 1000;
    display: none; /* 默认隐藏，悬停时显示 */
}

.journal-nav-submenu li {
    margin: 0;
    padding: 0 16px;
    white-space: nowrap;
}

.journal-nav-submenu a {
    display: block;
    padding: 6px 0;
    font-size: 20px;
    font-weight: 400;
    color: #555555;
    border-bottom: none;
}

.journal-nav-submenu a:hover,
.journal-nav-submenu a:focus {
    color: #c42021;
    background-color: #f5f7fb;
}

/* 悬停展示子菜单 */
.journal-nav-menu li.has-children:hover > .journal-nav-submenu,
.journal-nav-menu li.has-children:focus-within > .journal-nav-submenu {
    display: block;
}

/* --------- 响应式：手机端处理 --------- */
@media (max-width: 768px) {
    /* 手机端隐藏白色期刊栏目条，改用头部菜单按钮 */
    .journal-nav-bar {
        display: none;
    }

    /* 手机端隐藏蓝条里的 Home 文本，只保留期刊名 */
    .journal-header-bar .journal-page-title a {
        display: none;
    }

    .journal-header-bar .fh {
        display: none;
    }

    .journal-page-title{
        font-size: 15px;
    }
}


@media (min-width: 769px) {
    /* 桌面端隐藏 header 导航（仅保留白色期刊栏目条） */
    .site-header .header-nav {
        display: none !important;
    }
}


/* Journal 主体内容额外间距 */
.journal-main-content {
    padding-top: 20px;
}

/* Journal 精简 Footer */
.journal-footer {
    background-color: #000;
    color: #ffffff;
}

.journal-footer-bottom {
    background-color: #000;
    padding: 12px 0;
}

.journal-footer-bottom p {
    margin: 0;
    font-size: 13px;
}

.journal-footer-links {
    font-size: 13px;
}

.journal-footer-links a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 8px;
}

.journal-footer-links a:hover {
    text-decoration: underline;
}

.journal-footer-links .separator {
    margin: 0 4px;
    color: #cccccc;
}

/* 响应式：小屏幕下 Journal Header 垂直排布 */
@media (max-width: 768px) {
    .journal-header-container {
        flex-direction: column;
    }

    .journal-nav-menu {
        row-gap: 4px;
    }
}

/* 手机端菜单子栏目样式优化 */
@media (max-width: 768px) {
    /* 有子栏目的菜单项 */
    .header-nav .mobile-nav-has-children {
        position: relative;
    }

    /* 子菜单切换按钮（箭头） */
    .mobile-nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin-left: auto;
        width: 24px;
        height: 24px;
        font-size: 20px;
        font-weight: bold;
        color: #666;
        transition: transform 0.3s ease, color 0.3s ease;
        flex-shrink: 0;
        line-height: 1;
    }

    /* 展开状态：箭头旋转 */
    .mobile-nav-has-children.active > .mobile-nav-link .mobile-nav-toggle,
    .mobile-nav-has-children.active > .mobile-nav-label .mobile-nav-toggle {
        transform: rotate(90deg);
        color: #c42021;
    }

    /* 子菜单默认隐藏 */
    .header-nav .mobile-nav-submenu {
        display: none;
        list-style: none;
        margin: 0;
        padding: 0;
        background-color: #f8f9fa;
        border-top: 1px solid #e0e0e0;
    }

    /* 展开时显示子菜单 */
    .mobile-nav-has-children.active > .mobile-nav-submenu {
        display: block;
    }

    /* 子菜单项样式 */
    .header-nav .mobile-nav-submenu {
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            max-height: 0;
        }
        to {
            opacity: 1;
            max-height: 500px;
        }
    }

    .header-nav .mobile-nav-submenu li {
        border-bottom: 1px solid #e8e8e8;
        margin: 0;
    }

    .header-nav .mobile-nav-submenu li:last-child {
        border-bottom: none;
    }

    .header-nav .mobile-nav-submenu a {
        display: block;
        padding: 12px 20px 12px 45px; /* 左侧缩进，显示层级 */
        color: #555;
        text-decoration: none;
        font-size: 14px;
        transition: background-color 0.2s ease, color 0.2s ease;
        position: relative;
    }

    /* 子菜单项左侧指示线 */
    .header-nav .mobile-nav-submenu a::before {
        content: '';
        position: absolute;
        left: 30px;
        top: 50%;
        transform: translateY(-50%);
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background-color: #c42021;
        opacity: 0;
        transition: opacity 0.2s ease;
    }

    .header-nav .mobile-nav-submenu a:hover::before,
    .header-nav .mobile-nav-submenu a:focus::before {
        opacity: 1;
    }

    .header-nav .mobile-nav-submenu a:hover,
    .header-nav .mobile-nav-submenu a:focus {
        background-color: #e8f4f8;
        color: #c42021;
        padding-left: 50px; /* 悬浮时稍微右移 */
    }

    /* 主菜单项（有子栏目的）点击区域优化 */
    .header-nav .mobile-nav-link,
    .header-nav .mobile-nav-label {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 20px;
        cursor: pointer;
    }

    /* 主菜单项点击时背景变化 */
    .mobile-nav-has-children.active > .mobile-nav-link,
    .mobile-nav-has-children.active > .mobile-nav-label {
        background-color: #f0f0f0;
        color: #c42021;
    }
}