/* ================================================================
   content.css — 内容页独有样式
   包含：文章详情、附件、上一篇/下一篇导航
   ================================================================ */

.main-content {
    position: relative;
    z-index: 2;
    background: #f7f9fc;
    padding-top: 32px;
    padding-bottom: 56px;
}
.page-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

/* ===== 左侧菜单 ===== */
.sidebar-menu {
    flex: 0 0 300px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: box-shadow var(--transition);
    position: sticky;
    top: 20px;
	display:none;
}
.sidebar-menu:hover {
    box-shadow: var(--shadow-hover);
}
.sidebar-menu .menu-header {
    padding: 20px 24px 16px;
    border-bottom: 2px solid var(--primary);
    background: linear-gradient(135deg, #f8faff 0%, #f0f5fa 100%);
}
.sidebar-menu .menu-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 2px;
}
.sidebar-menu .menu-toggle {
    display: none;
    padding: 14px 24px;
    font-weight: 600;
    font-size: 17px;
    color: var(--primary);
    background: #f8faff;
    cursor: pointer;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    user-select: none;
}
.sidebar-menu .menu-toggle .arrow-icon {
    transition: transform 0.3s ease;
    font-size: 14px;
}
.sidebar-menu .menu-toggle.open .arrow-icon {
    transform: rotate(180deg);
}
.sidebar-menu .menu-list {
    padding: 6px 0;
}
.sidebar-menu .menu-list.hidden {
    display: none;
}
.sidebar-menu .level1-item {
    border-bottom: 1px solid #f0f2f5;
}
.sidebar-menu .level1-item:last-child {
    border-bottom: none;
}
.sidebar-menu .level1-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    transition: background var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-menu .level1-row:hover {
    background: #f0f5fa;
}
.sidebar-menu .level1-item.active>.level1-row {
    border-left-color: var(--primary);
    background: #f0f5fa;
}
.sidebar-menu .level1-link {
    flex: 1;
    padding: 14px 12px 14px 24px;
    font-weight: 600;
    font-size: 17px;
    color: var(--text);
    transition: color var(--transition);
    text-decoration: none;
    display: block;
    min-width: 0;
}
.sidebar-menu .level1-link:hover {
    color: var(--primary);
}
.sidebar-menu .level1-item.active>.level1-row .level1-link {
    color: var(--primary);
}
.sidebar-menu .level1-toggle {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    color: #999;
    transition: transform 0.3s ease, color 0.3s ease;
    user-select: none;
    border: none;
    background: transparent;
    font-family: var(--font);
}
.sidebar-menu .level1-toggle:hover {
    color: var(--primary);
}
.sidebar-menu .level1-item.open>.level1-row .level1-toggle {
    transform: rotate(90deg);
    color: var(--primary);
}
.sidebar-menu .level1-item.no-children .level1-toggle {
    display: none;
}
.sidebar-menu .level2-wrap {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    background: #f8faff;
}
.sidebar-menu .level1-item.open .level2-wrap {
    max-height: 600px;
    opacity: 1;
}
.sidebar-menu .level2-item a {
    display: block;
    padding: 10px 24px 10px 48px;
    font-size: 16px;
    font-weight: 400;
    color: var(--text-light);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    border-left: 3px solid transparent;
    position: relative;
    text-decoration: none;
}
.sidebar-menu .level2-item a::before {
    content: "—";
    position: absolute;
    left: 28px;
    font-size: 14px;
    opacity: 0.25;
    transition: opacity 0.3s ease;
}
.sidebar-menu .level2-item a:hover {
    background: #edf3fa;
    color: var(--primary);
    border-left-color: var(--primary);
}
.sidebar-menu .level2-item a:hover::before {
    opacity: 0.6;
}
.sidebar-menu .level2-item.active a {
    background: var(--primary);
    color: #fff;
    border-left-color: var(--accent);
    font-weight: 600;
}
.sidebar-menu .level2-item.active a::before {
    opacity: 1;
    color: #fff;
}
.sidebar-menu .level2-item.active a:hover {
    background: var(--primary-light);
    color: #fff;
}

/* ===== 右侧内容 ===== */
.main-content-area {
    flex: 1;
    min-width: 0;
    width: 100%;
}
.breadcrumb-area {
    background: #fff;
    padding: 16px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 28px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 10px;
    font-size: 17px;
    color: var(--text-light);
}
.breadcrumb-area .home-link {
    color: var(--primary);
    font-weight: 500;
}
.breadcrumb-area .home-link:hover {
    text-decoration: underline;
}
.breadcrumb-area .sep {
    color: #ccc;
    margin: 0 4px;
}
.breadcrumb-area .current {
    color: var(--text);
    font-weight: 500;
}

/* ===== 文章详情 ===== */
.article-detail-wrap {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow var(--transition);
    padding: 40px 44px 48px;
}
.article-detail-wrap:hover {
    box-shadow: var(--shadow-hover);
}
.article-detail-wrap .article-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.35;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.article-detail-wrap .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 28px;
    padding-bottom: 16px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
    font-size: 15px;
    color: var(--text-light);
}
.article-detail-wrap .article-meta .meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}
.article-detail-wrap .article-meta .meta-item .icon {
    font-size: 16px;
    opacity: 0.6;
}
.article-detail-wrap .article-meta .tag-badge {
    display: inline-block;
    background: #dc143c;
    color: #fff;
    font-size: 12px;
    padding: 0 12px;
    border-radius: 12px;
    font-weight: 400;
    line-height: 24px;
}
.article-detail-wrap .article-meta .tag-badge.new {
    background: #1a6b8a;
}
.article-detail-wrap .article-body {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text);
}
.article-detail-wrap .article-body p {
    margin-bottom: 18px;
    text-indent: 2em;
}
.article-detail-wrap .article-body p:last-child {
    margin-bottom: 0;
}
.article-detail-wrap .article-body strong {
    color: var(--primary);
}
.article-detail-wrap .article-body .content-img {
    margin: 24px 0 28px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}
.article-detail-wrap .article-body .content-img img {
    width: 100%;
    height: auto;
    display: block;
}
.article-detail-wrap .article-body .content-img .img-caption {
    padding: 12px 16px;
    background: #f8faff;
    font-size: 15px;
    color: var(--text-light);
    text-align: center;
    border-top: 1px solid var(--border);
}
.article-detail-wrap .attachments {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-detail-wrap .attachments .attach-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.article-detail-wrap .attachments .attach-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
}
.article-detail-wrap .attachments .attach-list a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    color: var(--primary);
    padding: 4px 12px 4px 8px;
    border-radius: var(--radius-sm);
    background: var(--primary-bg);
    border: 1px solid var(--border);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.article-detail-wrap .attachments .attach-list a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.article-detail-wrap .attachments .attach-list a .file-icon {
    font-size: 18px;
}
.article-detail-wrap .article-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    gap: 12px 20px;
}
.article-detail-wrap .article-nav .nav-link {
    font-size: 16px;
    color: var(--text-light);
    transition: color var(--transition);
    max-width: 45%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}
.article-detail-wrap .article-nav .nav-link:hover {
    color: var(--primary);
}
.article-detail-wrap .article-nav .nav-link .arrow {
    font-size: 14px;
    opacity: 0.5;
}
.article-detail-wrap .article-nav .nav-link.prev .arrow {
    margin-right: 4px;
}
.article-detail-wrap .article-nav .nav-link.next .arrow {
    margin-left: 4px;
}
.article-detail-wrap .article-nav .nav-link.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}
.article-detail-wrap .back-to-list {
    margin-top: 20px;
    text-align: center;
}
.article-detail-wrap .back-to-list .btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 500;
    color: var(--primary);
    background: #fff;
    transition: all 0.3s ease;
    cursor: pointer;
    font-family: var(--font);
}
.article-detail-wrap .back-to-list .btn-back:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(10, 61, 107, 0.15);
}

/* ===== 内容页响应式 ===== */
@media (max-width: 1200px) {
    .sidebar-menu {
        flex: 0 0 260px;
    }
    .article-detail-wrap {
        padding: 32px 32px 36px;
    }
    .article-detail-wrap .article-title {
        font-size: 28px;
    }
}
@media (max-width: 992px) {
    .page-layout {
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-menu {
        flex: 1 1 auto;
        width: 100%;
        position: static;
    }
    .sidebar-menu .menu-toggle {
        display: flex;
    }
    .sidebar-menu .menu-list {
        display: block;
    }
    .sidebar-menu .menu-list.hidden {
        display: none;
    }
    .sidebar-menu .level2-item a {
        padding-left: 40px;
    }
    .sidebar-menu .level2-item a::before {
        left: 20px;
    }
    .sidebar-menu .level1-link {
        padding: 14px 12px 14px 20px;
        font-size: 16px;
    }
    .article-detail-wrap {
        padding: 24px 20px 28px;
    }
    .article-detail-wrap .article-title {
        font-size: 24px;
    }
    .article-detail-wrap .article-body {
        font-size: 16px;
    }
}
@media (max-width: 768px) {
    .main-content {
        padding-top: 20px;
        padding-bottom: 28px;
    }
    .sidebar-menu .menu-header {
        padding: 16px 18px;
    }
    .sidebar-menu .menu-header h2 {
        font-size: 19px;
    }
    .sidebar-menu .menu-toggle {
        font-size: 16px;
        padding: 12px 18px;
    }
    .sidebar-menu .level1-link {
        padding: 12px 12px 12px 18px;
        font-size: 16px;
    }
    .sidebar-menu .level1-toggle {
        width: 38px;
        height: 38px;
        font-size: 13px;
    }
    .sidebar-menu .level2-item a {
        padding: 10px 18px 10px 34px;
        font-size: 15px;
    }
    .sidebar-menu .level2-item a::before {
        left: 16px;
    }
    .breadcrumb-area {
        padding: 12px 18px;
        font-size: 15px;
        border-radius: var(--radius-sm);
        margin-bottom: 18px;
    }
    .article-detail-wrap {
        padding: 18px 14px 22px;
    }
    .article-detail-wrap .article-title {
        font-size: 20px;
        margin-bottom: 12px;
    }
    .article-detail-wrap .article-meta {
        font-size: 14px;
        gap: 10px 18px;
        padding-bottom: 12px;
        margin-bottom: 18px;
    }
    .article-detail-wrap .article-body {
        font-size: 15px;
        line-height: 1.8;
    }
    .article-detail-wrap .article-body p {
        margin-bottom: 14px;
        text-indent: 2em;
    }
    .article-detail-wrap .article-body .content-img {
        margin: 16px 0 18px;
    }
    .article-detail-wrap .article-body .content-img .img-caption {
        font-size: 13px;
        padding: 8px 12px;
    }
    .article-detail-wrap .attachments {
        margin-top: 22px;
        padding-top: 16px;
    }
    .article-detail-wrap .attachments .attach-title {
        font-size: 15px;
    }
    .article-detail-wrap .attachments .attach-list a {
        font-size: 14px;
        padding: 3px 10px 3px 6px;
    }
    .article-detail-wrap .article-nav {
        flex-direction: column;
        gap: 8px;
        margin-top: 22px;
        padding-top: 16px;
    }
    .article-detail-wrap .article-nav .nav-link {
        max-width: 100%;
        font-size: 15px;
        white-space: normal;
        overflow: visible;
        text-overflow: clip;
    }
    .article-detail-wrap .back-to-list .btn-back {
        font-size: 15px;
        padding: 8px 24px;
    }
}
@media (max-width: 480px) {
    .sidebar-menu .menu-header h2 {
        font-size: 17px;
    }
    .sidebar-menu .level1-link {
        font-size: 15px;
        padding: 10px 10px 10px 16px;
    }
    .sidebar-menu .level1-toggle {
        width: 34px;
        height: 34px;
        font-size: 12px;
    }
    .sidebar-menu .level2-item a {
        font-size: 14px;
        padding: 8px 16px 8px 28px;
    }
    .sidebar-menu .level2-item a::before {
        font-size: 10px;
        left: 14px;
    }
    .breadcrumb-area {
        padding: 8px 12px;
        font-size: 14px;
    }
    .article-detail-wrap {
        padding: 14px 10px 18px;
    }
    .article-detail-wrap .article-title {
        font-size: 18px;
    }
    .article-detail-wrap .article-meta {
        font-size: 13px;
        gap: 6px 12px;
    }
    .article-detail-wrap .article-body {
        font-size: 14px;
    }
    .article-detail-wrap .article-body .content-img .img-caption {
        font-size: 12px;
    }
    .article-detail-wrap .attachments .attach-list {
        flex-direction: column;
        gap: 6px;
    }
    .article-detail-wrap .article-nav .nav-link {
        font-size: 14px;
    }
    .article-detail-wrap .back-to-list .btn-back {
        font-size: 14px;
        padding: 6px 18px;
    }
}
/* ================================================================
   内容页 — 表格样式 (新增)
   添加到 content.css 的 .article-body 部分
   ================================================================ */

/* ===== 表格基础样式 ===== */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0 24px;
    font-size: 15px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

/* ===== 表头 — 加粗，深色背景 ===== */
.article-body table thead th,
.article-body table th {
    font-weight: 700;
    background: var(--primary);
    color: #fff;
    padding: 12px 16px;
    text-align: left;
    border: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* ===== 表格单元格 ===== */
.article-body table td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    line-height: 1.6;
}

/* ===== 奇偶行背景色区分 ===== */
.article-body table tbody tr:nth-child(odd) {
    background: #ffffff;
}

.article-body table tbody tr:nth-child(even) {
    background: var(--primary-bg);
}

/* ===== 悬停效果 ===== */
.article-body table tbody tr:hover {
    background: #e8edf4;
    transition: background 0.2s ease;
}

/* ===== 表格内边距微调（无边框表格） ===== */
.article-body table tbody tr:last-child td {
    border-bottom: none;
}

/* ===== 响应式：小屏表格横向滚动 ===== */
@media (max-width: 768px) {
    .article-body .table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 16px 0 20px;
        border-radius: var(--radius-sm);
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    }
    .article-body .table-wrap table {
        margin: 0;
        min-width: 600px;
        box-shadow: none;
        border-radius: 0;
    }
    .article-body .table-wrap table th,
    .article-body .table-wrap table td {
        padding: 10px 14px;
        font-size: 14px;
        white-space: nowrap;
    }
}

/* ===== 表格在文章中的使用示例 ===== */
.article-body .table-caption {
    font-size: 14px;
    color: var(--text-light);
    text-align: center;
    margin-top: -16px;
    margin-bottom: 20px;
    padding: 6px 0;
    border-bottom: 1px dashed var(--border);
}