/* MBT知识库系统专用样式 */

:root {
    --kb-primary: #1a3a8f;
    --kb-primary-light: #2a5caa;
    --kb-secondary: #0e9f6e;
    --kb-accent: #d97706;
    --kb-bg: #f8fafc;
    --kb-card-bg: #ffffff;
    --kb-text: #1f2937;
    --kb-text-light: #6b7280;
    --kb-border: #e2e8f0;
    --kb-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --kb-card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); /* 【新增】补充缺失变量 */
    --kb-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: var(--kb-bg);
    color: var(--kb-text);
    line-height: 1.6;
}

/* ========== 入口页面样式 ========== */

/* 【新增】角色按钮样式 */
.kb-role-btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
}

.kb-role-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* 【新增】快捷入口主卡片 */
.kb-quick-entry-main {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--kb-shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: transform 0.2s ease;
    margin-bottom: 16px;
}

.kb-quick-entry-main:hover {
    transform: translateY(-2px);
}

/* 【新增】快捷入口次要卡片 */
.kb-quick-entry {
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--kb-shadow);
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.kb-quick-entry:hover {
    transform: translateY(-2px);
}

/* 【新增】Tab按钮 */
.kb-tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.3s ease;
}

.kb-tab-btn.active {
    color: #1a3a8f;
    border-bottom-color: #1a3a8f;
}

.kb-tab-btn:hover {
    color: #1a3a8f;
}

.kb-header {
    background: linear-gradient(135deg, var(--kb-primary) 0%, var(--kb-primary-light) 100%);
    color: white;
    padding: 48px 24px;
    text-align: center;
    box-shadow: var(--kb-shadow-lg);
}

.kb-header h1 {
    font-size: 2.5rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.kb-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.kb-search-box {
    max-width: 700px;
    margin: 32px auto 0;
    position: relative;
}

.kb-search-box input {
    width: 100%;
    padding: 16px 24px 16px 50px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    box-shadow: var(--kb-shadow-lg);
    transition: all 0.3s ease;
}

.kb-search-box input:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(26, 58, 143, 0.2);
}

.kb-search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--kb-text-light);
    font-size: 1.2rem;
}

.kb-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* 分类卡片网格 */
.kb-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.kb-category-card {
    background: var(--kb-card-bg);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--kb-shadow);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    border-left: 4px solid transparent;
}

.kb-category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--kb-shadow-lg);
}

.kb-category-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 1.5rem;
}

.kb-category-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.kb-category-card p {
    color: var(--kb-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.kb-category-meta {
    display: flex;
    gap: 16px;
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--kb-text-light);
}

.kb-category-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 最近文档区域 */
.kb-recent-section {
    margin-top: 60px;
}

.kb-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.kb-section-header h2 {
    font-size: 1.8rem;
    color: var(--kb-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Tab组件样式 */
.kb-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0;
}

.kb-tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-tab-btn:hover {
    color: var(--kb-primary);
    background: rgba(26, 58, 143, 0.05);
}

.kb-tab-btn.active {
    color: var(--kb-primary);
    border-bottom-color: var(--kb-primary);
}

.kb-tab-content {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kb-doc-list {
    display: grid;
    gap: 16px;
}

.kb-doc-item {
    background: var(--kb-card-bg);
    border-radius: 12px;
    padding: 20px 24px;
    box-shadow: var(--kb-shadow);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.kb-doc-item:hover {
    transform: translateX(4px);
    box-shadow: var(--kb-shadow-lg);
}

.kb-doc-icon {
    width: 48px;
    height: 48px;
    background: var(--kb-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.kb-doc-info {
    flex: 1;
}

.kb-doc-info h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    font-weight: 600;
}

.kb-doc-info p {
    font-size: 0.9rem;
    color: var(--kb-text-light);
}

.kb-doc-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--kb-text-light);
    flex-shrink: 0;
}

.kb-doc-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ========== Markdown阅读器样式 ========== */

.kb-viewer-layout {
    display: flex;
    min-height: calc(100vh - 80px);
}

.kb-sidebar {
    width: 300px;
    background: var(--kb-card-bg);
    border-right: 1px solid var(--kb-border);
    overflow-y: auto;
    padding: 24px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.kb-sidebar-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--kb-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kb-sidebar-header h3 {
    font-size: 1.2rem;
    color: var(--kb-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 左侧侧边栏隐藏按钮 */
.kb-sidebar-hide-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s ease;
    color: var(--kb-text-light);
    font-size: 12px;
    flex-shrink: 0;
}

.kb-sidebar-hide-btn:hover {
    background: var(--kb-bg);
    color: var(--kb-primary);
}

/* 侧边栏隐藏状态 */
.kb-sidebar.hidden {
    display: none;
}

/* 侧边栏隐藏时，主内容区自适应 */
.kb-sidebar.hidden ~ .kb-content {
    max-width: 1000px;
    margin: 0 auto;
}

/* 显示侧边栏的浮动按钮（侧边栏隐藏时出现） */
.kb-sidebar-show-btn {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 60px;
    border: none;
    background: var(--kb-card-bg);
    color: var(--kb-primary);
    border-radius: 0 6px 6px 0;
    box-shadow: 2px 0 8px rgba(0,0,0,0.1);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: all 0.2s ease;
    font-size: 12px;
    border: 1px solid var(--kb-border);
    border-left: none;
}

.kb-sidebar-show-btn:hover {
    background: var(--kb-primary);
    color: white;
    box-shadow: 2px 0 12px rgba(26,58,143,0.3);
}

/* 侧边栏隐藏时显示浮动按钮 */
.kb-sidebar.hidden ~ .kb-sidebar-show-btn {
    display: flex;
}

.kb-toc {
    list-style: none;
}

.kb-toc li {
    margin: 8px 0;
}

.kb-toc a {
    color: var(--kb-text);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: 8px;
    display: block;
    transition: all 0.2s ease;
}

.kb-toc a:hover {
    background: var(--kb-bg);
    color: var(--kb-primary);
}

.kb-toc .toc-h2 {
    padding-left: 10px;
    font-size: 0.9rem;
}

.kb-toc .toc-h3 {
    padding-left: 14px;
    font-size: 0.85rem;
}

.kb-content {
    flex: 1;
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.kb-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.9rem;
    color: var(--kb-text-light);
}

.kb-breadcrumb a {
    color: var(--kb-primary);
    text-decoration: none;
}

.kb-breadcrumb a:hover {
    text-decoration: underline;
}

.kb-article-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--kb-text);
    margin-bottom: 16px;
    line-height: 1.3;
}

.kb-article-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--kb-border);
    font-size: 0.9rem;
    color: var(--kb-text-light);
}

.kb-article-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Markdown内容样式 */
.kb-markdown-content {
    font-size: 1.05rem;
    line-height: 1.8;
}

.kb-markdown-content h1,
.kb-markdown-content h2,
.kb-markdown-content h3,
.kb-markdown-content h4 {
    margin-top: 32px;
    margin-bottom: 16px;
    font-weight: 700;
    color: var(--kb-text);
}

.kb-markdown-content h1 { font-size: 2rem; }
.kb-markdown-content h2 { font-size: 1.6rem; }
.kb-markdown-content h3 { font-size: 1.3rem; }
.kb-markdown-content h4 { font-size: 1.1rem; }

.kb-markdown-content p {
    margin-bottom: 16px;
}

.kb-markdown-content ul,
.kb-markdown-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.kb-markdown-content li {
    margin: 8px 0;
}

.kb-markdown-content code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    color: #dc2626;
}

.kb-markdown-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

.kb-markdown-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

/* 【重构】Mermaid代码块不再硬性隐藏
 * 渲染成功时会被替换为图表卡片
 * 渲染失败时保留原始代码,用户可查看源码 */
.kb-markdown-content pre > code.language-mermaid,
.kb-markdown-content pre > code.lang-mermaid {
    background: #f8fafc;
    color: #1f2937;
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Mermaid 源码容器(等待渲染的占位) */
.kb-markdown-content .mermaid-source-block {
    /* 渲染成功后会被替换为卡片,此样式仅作为加载过渡 */
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    margin: 16px 0;
}

.kb-markdown-content blockquote {
    border-left: 4px solid var(--kb-primary);
    padding: 16px 20px;
    margin: 20px 0;
    background: var(--kb-bg);
    border-radius: 0 8px 8px 0;
}

.kb-markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.kb-markdown-content th,
.kb-markdown-content td {
    border: 1px solid var(--kb-border);
    padding: 12px 16px;
    text-align: left;
}

.kb-markdown-content th {
    background: var(--kb-bg);
    font-weight: 600;
}

.kb-markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: var(--kb-shadow);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.kb-markdown-content img:hover {
    transform: scale(1.02);
}

.kb-markdown-content a {
    color: var(--kb-primary);
    text-decoration: none;
    border-bottom: 1px dashed var(--kb-primary);
}

.kb-markdown-content a:hover {
    border-bottom-style: solid;
}

/* Mermaid图表样式 */
.mermaid-chart {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--kb-shadow);
    overflow-x: auto;
}

.mermaid-chart svg {
    max-width: 100%;
    height: auto;
}

/* ========== Mermaid查看器增强样式 ========== */

.mermaid-viewer-card {
    background: #ffffff;
    border-radius: 12px;
    margin: 24px 0;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
    /* 防止浏览器扩展修改 */
    translate: no;
    -webkit-user-select: none;
    user-select: none;
}

/* 保护SVG内容不被扩展替换 */
.mermaid-viewer-card svg,
.mermaid-viewer-card [data-mermaid-wrapper] {
    pointer-events: auto;
}

.mermaid-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border-bottom: 1px solid #e5e7eb;
}

/* 【新增】全屏模式下的工具栏样式 */
:fullscreen .mermaid-toolbar,
:-webkit-full-screen .mermaid-toolbar,
:-moz-full-screen .mermaid-toolbar,
:-ms-fullscreen .mermaid-toolbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 24px !important;
    background: rgba(30, 41, 59, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.mermaid-title {
    color: #1f2937;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mermaid-title i {
    color: #3b82f6;
}

.mermaid-actions {
    display: flex;
    gap: 8px;
}

.mermaid-actions button {
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    color: #475569;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.mermaid-actions button:hover {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

.mermaid-actions button:active {
    transform: translateY(0);
}

.mermaid-container {
    padding: 24px;
    background: #ffffff;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
}

/* 【新增】全屏模式下的容器样式 */
:fullscreen .mermaid-container,
:-webkit-full-screen .mermaid-container,
:-moz-full-screen .mermaid-container,
:-ms-fullscreen .mermaid-container {
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    padding: 80px 40px 40px 40px !important; /* 顶部留出工具栏空间 */
    overflow: hidden !important; /* 隐藏滚动条 */
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

/* 全屏模式下的 wrapper 样式 */
:fullscreen .mermaid-svg-wrapper,
:-webkit-full-screen .mermaid-svg-wrapper,
:-moz-full-screen .mermaid-svg-wrapper,
:-ms-fullscreen .mermaid-svg-wrapper {
    display: flex !important;
    align-items: center !important; /* 垂直居中 */
    justify-content: center !important; /* 水平居中 */
    width: 100% !important;
    height: 100% !important;
    overflow: visible !important;
    position: relative !important;
}

/* 【关键修复】全屏模式下强制 SVG 自适应 */
:fullscreen .mermaid-svg-wrapper svg,
:-webkit-full-screen .mermaid-svg-wrapper svg,
:-moz-full-screen .mermaid-svg-wrapper svg,
:-ms-fullscreen .mermaid-svg-wrapper svg {
    width: auto !important;
    height: auto !important;
    max-width: 95vw !important;
    max-height: calc(100vh - 160px) !important; /* 减去工具栏和padding */
    min-width: auto !important;
    min-height: auto !important;
    display: block !important; /* 确保是块级元素 */
    margin: 0 auto !important; /* 水平居中 */
    vertical-align: middle !important; /* 垂直对齐 */
}

.mermaid-svg-wrapper {
    transform-origin: center center;
    transition: transform 0.3s ease;
}

/* 【新增】确保 SVG 容器在全屏时正确对齐 */
:fullscreen .mermaid-container > .mermaid-svg-wrapper,
:-webkit-full-screen .mermaid-container > .mermaid-svg-wrapper,
:-moz-full-screen .mermaid-container > .mermaid-svg-wrapper,
:-ms-fullscreen .mermaid-container > .mermaid-svg-wrapper {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
}

.mermaid-svg-wrapper svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.mermaid-source {
    padding: 16px;
    background: #f8fafc;
    border-top: 1px solid #e5e7eb;
}

.mermaid-source pre {
    margin: 0;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
}

.mermaid-source code {
    color: #1f2937;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
}

/* 【新增】Mermaid 节点样式优化 - 确保 style 指令正确应用 */
.mermaid-container .node rect,
.mermaid-container .node circle,
.mermaid-container .node ellipse,
.mermaid-container .node polygon {
    /* 确保节点的填充和描边样式不被覆盖 */
    stroke-width: 2px !important;
}

/* 确保节点文字颜色正确 */
.mermaid-container .node .label {
    color: inherit !important;
    fill: inherit !important;
}

/* Toast提示消息 */
.mermaid-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 24px;
    border-radius: 8px;
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    animation: mermaidToastSlideIn 0.3s ease;
}

.mermaid-toast-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.mermaid-toast-info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.mermaid-toast-error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.mermaid-toast-hide {
    animation: mermaidToastSlideOut 0.3s ease forwards;
}

@keyframes mermaidToastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes mermaidToastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* 代码高亮样式(如果加载了Highlight.js) */
.hljs {
    display: block;
    overflow-x: auto;
    padding: 0.5em;
    background: #1e293b;
    color: #e2e8f0;
}

.hljs-comment,
.hljs-quote {
    color: #94a3b8;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
    color: #c084fc;
}

.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
    color: #67e8f9;
}

.hljs-string,
.hljs-doctag {
    color: #86efac;
}

.hljs-title,
.hljs-section,
.hljs-selector-id {
    color: #fbbf24;
}

.hljs-type,
.hljs-class .hljs-title {
    color: #f472b6;
}

.hljs-tag,
.hljs-name,
.hljs-attribute {
    color: #60a5fa;
}

.hljs-regexp,
.hljs-link {
    color: #f87171;
}

.hljs-symbol,
.hljs-bullet {
    color: #fcd34d;
}

.hljs-built_in,
.hljs-builtin-name {
    color: #fbbf24;
}

.hljs-meta {
    color: #94a3b8;
}

.hljs-deletion {
    background: #7f1d1d;
}

.hljs-addition {
    background: #14532d;
}

.hljs-emphasis {
    font-style: italic;
}

.hljs-strong {
    font-weight: bold;
}

/* 导航按钮 */
.kb-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--kb-border);
}

.kb-nav-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background: var(--kb-card-bg);
    border: 1px solid var(--kb-border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--kb-text);
    transition: all 0.3s ease;
}

.kb-nav-btn:hover {
    background: var(--kb-primary);
    color: white;
    border-color: var(--kb-primary);
    transform: translateY(-2px);
    box-shadow: var(--kb-shadow);
}

.kb-nav-btn.prev::before {
    content: '←';
    font-size: 1.2rem;
}

.kb-nav-btn.next::after {
    content: '→';
    font-size: 1.2rem;
}

/* ========== 搜索页面样式 ========== */

.kb-search-results {
    margin-top: 32px;
}

.kb-search-result-item {
    background: var(--kb-card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--kb-shadow);
    transition: all 0.3s ease;
}

.kb-search-result-item:hover {
    box-shadow: var(--kb-shadow-lg);
}

.kb-search-result-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.kb-search-result-title a {
    color: var(--kb-primary);
    text-decoration: none;
}

.kb-search-result-title a:hover {
    text-decoration: underline;
}

.kb-search-result-snippet {
    color: var(--kb-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.kb-search-result-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--kb-text-light);
}

mark {
    background: #fef3c7;
    color: #92400e;
    padding: 2px 4px;
    border-radius: 3px;
}

/* ========== 图片灯箱 ========== */

.kb-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.kb-lightbox.active {
    display: flex;
}

.kb-lightbox img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.kb-lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.kb-lightbox-close:hover {
    transform: rotate(90deg);
}

/* ========== 响应式设计 ========== */

@media (max-width: 1024px) {
    .kb-sidebar {
        width: 260px;
    }
    
    .kb-content {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .kb-header h1 {
        font-size: 1.8rem;
    }
    
    .kb-categories {
        grid-template-columns: 1fr;
    }
    
    .kb-viewer-layout {
        flex-direction: column;
    }
    
    /* 【新增】移动端目录浮动按钮 */
    .kb-sidebar-toggle-btn {
        display: flex;
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--kb-primary) 0%, var(--kb-primary-light) 100%);
        color: white;
        border: none;
        box-shadow: 0 4px 16px rgba(26, 58, 143, 0.35);
        cursor: pointer;
        z-index: 999;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
    }
    
    .kb-sidebar-toggle-btn:hover {
        transform: scale(1.08);
        box-shadow: 0 6px 20px rgba(26, 58, 143, 0.45);
    }
    
    .kb-sidebar-toggle-btn:active {
        transform: scale(0.95);
    }
    
    .kb-sidebar-toggle-btn i {
        font-size: 22px;
    }
    
    /* 【新增】移动端目录面板 */
    .kb-sidebar-mobile {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: var(--kb-card-bg);
        box-shadow: -4px 0 20px rgba(0,0,0,0.15);
        z-index: 1000;
        transition: right 0.3s ease;
        overflow-y: auto;
        padding: 24px;
    }
    
    .kb-sidebar-mobile.open {
        right: 0;
    }
    
    .kb-sidebar-mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .kb-sidebar-mobile-overlay.visible {
        opacity: 1;
        visibility: visible;
    }
    
    .kb-sidebar-mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 24px;
        padding-bottom: 16px;
        border-bottom: 2px solid var(--kb-border);
    }
    
    .kb-sidebar-mobile-header h3 {
        font-size: 1.2rem;
        color: var(--kb-primary);
        display: flex;
        align-items: center;
        gap: 10px;
        margin: 0;
    }
    
    .kb-sidebar-close-btn {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--kb-bg);
        border: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s ease;
    }
    
    .kb-sidebar-close-btn:hover {
        background: var(--kb-border);
    }
    
    .kb-sidebar-close-btn i {
        font-size: 18px;
        color: var(--kb-text);
    }
    
    /* 隐藏桌面端侧边栏和浮动按钮 */
    .kb-sidebar {
        display: none;
    }
    
    .kb-sidebar-show-btn {
        display: none !important;
    }
    
    .kb-content {
        padding: 24px 16px;
    }
    
    .kb-article-title {
        font-size: 1.6rem;
    }
    
    .kb-navigation {
        flex-direction: column;
        gap: 12px;
    }
    
    .kb-nav-btn {
        justify-content: center;
    }
    
    /* 移动端按钮组垂直排列 */
    .kb-back-buttons {
        flex-direction: column;
    }
    
    .kb-back-btn,
    .kb-share-btn {
        width: 100%;
        justify-content: center;
    }
    
    /* 移动端分享对话框优化 */
    .kb-share-dialog-content {
        padding: 24px;
        width: 95%;
    }
    
    .kb-share-url-box {
        flex-direction: column;
    }
    
    .kb-copy-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 【新增】桌面端隐藏移动端组件 */
@media (min-width: 769px) {
    .kb-sidebar-toggle-btn,
    .kb-sidebar-mobile,
    .kb-sidebar-mobile-overlay {
        display: none !important;
    }
}

/* ========== 返回按钮组 ========== */

.kb-back-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.kb-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--kb-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.kb-back-btn:hover {
    background: var(--kb-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--kb-shadow);
}

.kb-back-btn i {
    font-size: 14px;
}

/* ========== 分享按钮样式 ========== */

.kb-share-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--kb-secondary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.kb-share-btn:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--kb-shadow);
}

.kb-share-btn i {
    font-size: 14px;
}

/* ========== 分享对话框样式 ========== */

.kb-share-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.kb-share-dialog-content {
    background: white;
    border-radius: 16px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kb-share-dialog-content h3 {
    margin: 0 0 16px 0;
    color: var(--kb-primary);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.kb-share-title {
    color: var(--kb-text);
    font-size: 1rem;
    margin-bottom: 20px;
    padding: 12px;
    background: var(--kb-bg);
    border-radius: 8px;
    border-left: 4px solid var(--kb-primary);
}

.kb-share-url-box {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.kb-share-url-box input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--kb-border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--kb-text);
    background: var(--kb-bg);
    transition: border-color 0.3s ease;
}

.kb-share-url-box input:focus {
    outline: none;
    border-color: var(--kb-primary);
}

.kb-copy-btn {
    padding: 12px 20px;
    background: var(--kb-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.kb-copy-btn:hover {
    background: var(--kb-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--kb-shadow);
}

.kb-share-actions {
    display: flex;
    justify-content: flex-end;
}

.kb-close-btn {
    padding: 10px 24px;
    background: var(--kb-bg);
    color: var(--kb-text);
    border: 2px solid var(--kb-border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.kb-close-btn:hover {
    background: var(--kb-border);
    border-color: var(--kb-text-light);
}

/* ========== Toast 提示消息 ========== */

.kb-toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 16px 24px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10001;
    animation: toastSlideIn 0.3s ease;
}

.kb-toast-error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

.kb-toast-info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.kb-toast-hide {
    animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* ========== 回到顶部按钮 ========== */

.kb-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--kb-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(26, 58, 143, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.kb-back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.kb-back-to-top:hover {
    background: var(--kb-primary-light);
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 6px 16px rgba(26, 58, 143, 0.4);
}

.kb-back-to-top i {
    font-size: 20px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .kb-back-to-top {
        bottom: 84px;
        right: 24px;
        width: 44px;
        height: 44px;
        background: linear-gradient(135deg, #10b981 0%, #059669 100%);
        box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    }
    
    .kb-back-to-top:hover {
        background: linear-gradient(135deg, #059669 0%, #047857 100%);
        box-shadow: 0 6px 18px rgba(16, 185, 129, 0.45);
        transform: translateY(-3px) scale(1.08);
    }
    
    .kb-back-to-top i {
        font-size: 18px;
    }
}

/* ========== 目录折叠功能样式 ========== */

/* 目录项包装器（包含折叠按钮和链接） */
.toc-item-wrapper {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 折叠按钮 */
.toc-toggle-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    padding: 0;
    color: var(--kb-text-light);
}

.toc-toggle-btn:hover {
    background: var(--kb-bg);
    color: var(--kb-primary);
}

.toc-toggle-btn i {
    font-size: 10px;
    transition: transform 0.25s ease;
}

/* 折叠状态：箭头旋转 */
.toc-item.collapsed .toc-toggle-btn i {
    transform: rotate(-90deg);
}

/* 嵌套目录容器（用于展开/折叠动画） */
.toc-item > ul.kb-toc {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    max-height: 10000px; /* 足够大的值 */
    opacity: 1;
}

/* 折叠状态：隐藏子目录 */
.toc-item.collapsed > ul.kb-toc {
    max-height: 0;
    opacity: 0;
}

/* 调整嵌套目录的缩进和间距 */
.kb-toc .toc-item > ul.kb-toc {
    margin-top: 4px;
    padding-left: 0;
}

/* 目录链接调整（配合折叠按钮） */
.toc-item-wrapper + ul.kb-toc {
    margin-left: 10px; /* 为折叠按钮留出空间 */
}

/* 移动端目录也应用相同的折叠样式 */
.kb-sidebar-mobile .toc-item-wrapper {
    display: flex;
    align-items: center;
    gap: 4px;
}

.kb-sidebar-mobile .toc-toggle-btn {
    width: 24px;
    height: 24px;
}

.kb-sidebar-mobile .toc-item-wrapper + ul.kb-toc {
    margin-left: 14px;
}