/* ============================================================
   文档管理系统 - 前台样式表
   设计方向：编辑/知识型（Editorial / Knowledge）
   ============================================================ */

:root {
    /* 主色系 */
    --color-primary: #2D4A7C;
    --color-primary-light: #3B5A99;
    --color-primary-dark: #1E3559;
    --color-accent: #E8A33D;
    --color-accent-light: #F0B860;

    /* 中性色 */
    --color-bg: #FAFAF7;
    --color-bg-alt: #F3F1EC;
    --color-card: #FFFFFF;
    --color-text: #1F2937;
    --color-text-secondary: #6B7280;
    --color-text-light: #9CA3AF;
    --color-border: #E5E7EB;
    --color-border-light: #F0F0ED;
    --color-hover: #F3F4F6;

    /* 功能色 */
    --color-success: #10B981;
    --color-danger: #EF4444;

    /* 字体 */
    --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
    --font-sans: 'Noto Sans SC', -apple-system, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* 尺寸 */
    --nav-height: 64px;
    --container-width: 1200px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

    /* 过渡 */
    --transition: 0.2s ease;
}

/* ==================== 深色模式 ==================== */
[data-theme="dark"] {
    --color-bg: #0F1117;
    --color-bg-alt: #1A1D28;
    --color-card: #161922;
    --color-text: #E5E7EB;
    --color-text-secondary: #9CA3AF;
    --color-text-light: #6B7280;
    --color-border: #2D3142;
    --color-border-light: #1F2230;
    --color-hover: #1F2230;
    --color-primary: #6B8DD6;
    --color-primary-light: #8AAAE0;
    --color-primary-dark: #4A6BAA;
    --color-accent: #F0B860;
    --color-accent-light: #FFCB6B;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

[data-theme="dark"] body { background: var(--color-bg); color: var(--color-text); }
[data-theme="dark"] .navbar { background: rgba(22,25,34,0.85); }
[data-theme="dark"] .nav-dropdown-menu { background: var(--color-card); }
[data-theme="dark"] .markdown-body pre { background: #0D1117 !important; }
[data-theme="dark"] .markdown-body code { background: var(--color-bg-alt); }
[data-theme="dark"] .doc-content table tr:nth-child(even) { background: var(--color-bg-alt); }
[data-theme="dark"] .doc-content blockquote { background: var(--color-bg-alt); border-left-color: var(--color-primary); }
[data-theme="dark"] .hero { background: linear-gradient(135deg, #0F1117 0%, #1A1D28 100%); }
[data-theme="dark"] .hero-bg {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(107,141,214,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(240,184,96,0.05) 0%, transparent 50%),
        linear-gradient(180deg, #1A1D28 0%, var(--color-bg) 100%);
}
[data-theme="dark"] .hero-bg::before { opacity: 0.3; }
[data-theme="dark"] .site-footer { background: #0D0F15; }

/* ==================== 图片灯箱 ==================== */
.lightbox {
    display: none; position: fixed; inset: 0; z-index: 2000;
    background: rgba(0,0,0,0.9); align-items: center; justify-content: center;
    cursor: zoom-out; animation: fadeIn 0.2s ease;
}
.lightbox.show { display: flex; }
.lightbox img {
    max-width: 90vw; max-height: 90vh; object-fit: contain;
    border-radius: 4px; box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    animation: lightboxZoom 0.2s ease;
}
.lightbox-close {
    position: absolute; top: 20px; right: 24px;
    width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.1); border: none; border-radius: 50%;
    cursor: pointer; color: #fff; transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes lightboxZoom { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* 文档中的图片可点击 */
.doc-content img, .markdown-body img {
    cursor: zoom-in; transition: opacity 0.2s;
}
.doc-content img:hover, .markdown-body img:hover { opacity: 0.9; }

/* 深色模式切换按钮 */
.theme-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border: none; background: none;
    cursor: pointer; color: var(--color-text-secondary);
    border-radius: var(--radius-sm); transition: all var(--transition);
    flex-shrink: 0;
}
.theme-toggle:hover { background: var(--color-hover); color: var(--color-primary); }
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* ==================== 重置 ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }
img { max-width: 100%; height: auto; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }
ul, ol { padding-left: 1.5em; }

/* ==================== 通用工具 ==================== */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 6px; padding: 10px 20px; border-radius: var(--radius-sm);
    font-weight: 500; font-size: 14px; transition: all var(--transition);
    border: 1px solid transparent;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-light); color: #fff; }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-border); }
.btn-outline:hover { border-color: var(--color-primary); background: var(--color-hover); }
.doc-cat-badge {
    display: inline-block; padding: 2px 10px; font-size: 12px;
    font-weight: 500; color: var(--color-primary);
    background: rgba(45,74,124,0.08); border-radius: 20px;
}
.doc-date { font-size: 13px; color: var(--color-text-light); }
.doc-views {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 13px; color: var(--color-text-secondary);
}
.empty-state {
    text-align: center; padding: 60px 20px; color: var(--color-text-light);
}
.empty-state svg { margin-bottom: 16px; opacity: 0.4; }
.empty-state p { font-size: 15px; }
.empty-hint { margin-top: 8px; font-size: 13px; }
.empty-hint a { color: var(--color-primary); }

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-height);
    background: rgba(250,250,247,0.85);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}
.nav-container {
    max-width: var(--container-width); margin: 0 auto;
    height: 100%; padding: 0 24px;
    display: flex; align-items: center; gap: 20px;
}
.nav-toggle {
    display: none; padding: 6px; color: var(--color-text);
    align-items: center; justify-content: center;
}
.nav-logo {
    display: flex; align-items: center; gap: 8px;
    font-family: var(--font-serif); font-weight: 700; font-size: 18px;
    color: var(--color-primary); white-space: nowrap;
}
.nav-logo svg { color: var(--color-primary); }
.nav-search {
    flex: 1; max-width: 400px; position: relative;
    display: flex; align-items: center;
}
.nav-search svg {
    position: absolute; left: 12px; color: var(--color-text-light);
    pointer-events: none;
}
.nav-search input {
    width: 100%; padding: 8px 12px 8px 38px;
    border: 1px solid var(--color-border); border-radius: 20px;
    background: var(--color-card); color: var(--color-text);
    transition: all var(--transition);
}
.nav-search input:focus {
    outline: none; border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(45,74,124,0.1);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
    padding: 6px 12px; font-size: 14px; font-weight: 500;
    color: var(--color-text-secondary); border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-hover); }
.nav-links a.nav-admin {
    color: var(--color-accent); font-weight: 600;
}
.nav-overlay {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.3); z-index: 999;
}
.nav-overlay.show { display: block; }

/* ==================== 主内容 ==================== */
.main-content { padding-top: var(--nav-height); min-height: calc(100vh - var(--nav-height)); }

/* ==================== Hero 搜索区 ==================== */
.hero {
    position: relative; padding: 80px 24px 70px;
    text-align: center; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0; z-index: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(45,74,124,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(232,163,61,0.06) 0%, transparent 50%),
        linear-gradient(180deg, #F5F3EE 0%, var(--color-bg) 100%);
}
.hero-bg::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(45,74,124,0.015) 35px, rgba(45,74,124,0.015) 70px);
}
.hero-content { position: relative; z-index: 1; max-width: 680px; margin: 0 auto; }
.hero-title {
    font-family: var(--font-serif); font-size: 42px; font-weight: 900;
    color: var(--color-primary-dark); letter-spacing: -0.5px;
    margin-bottom: 12px;
    animation: fadeUp 0.6s ease;
}
.hero-subtitle {
    font-size: 17px; color: var(--color-text-secondary);
    margin-bottom: 32px;
    animation: fadeUp 0.6s ease 0.1s both;
}
.hero-search {
    display: flex; align-items: center; gap: 8px;
    background: var(--color-card); border-radius: 28px;
    padding: 6px 6px 6px 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    animation: fadeUp 0.6s ease 0.2s both;
}
.hero-search svg { color: var(--color-text-light); flex-shrink: 0; }
.hero-search input {
    flex: 1; border: none; background: transparent;
    padding: 12px 0; font-size: 15px; color: var(--color-text);
}
.hero-search input:focus { outline: none; }
.hero-search input::placeholder { color: var(--color-text-light); }
.hero-search button {
    padding: 12px 24px; background: var(--color-primary);
    color: #fff; border-radius: 22px; font-weight: 500; font-size: 14px;
    transition: background var(--transition);
}
.hero-search button:hover { background: var(--color-primary-light); }
.hero-tags {
    margin-top: 24px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
    animation: fadeUp 0.6s ease 0.3s both;
}
.hero-tag {
    padding: 5px 14px; font-size: 13px; color: var(--color-text-secondary);
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: 16px; transition: all var(--transition);
}
.hero-tag:hover { color: var(--color-primary); border-color: var(--color-primary); background: rgba(45,74,124,0.04); }

/* ==================== 区块 ==================== */
.section { padding: 56px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-header {
    display: flex; align-items: baseline; justify-content: space-between;
    margin-bottom: 28px; gap: 16px;
}
.section-title {
    font-family: var(--font-serif); font-size: 24px; font-weight: 700;
    color: var(--color-primary-dark);
}
.section-desc { font-size: 14px; color: var(--color-text-secondary); }
.section-more { font-size: 14px; font-weight: 500; color: var(--color-primary); }

/* ==================== 分类卡片网格 ==================== */
.category-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.category-card {
    display: block; padding: 24px; background: var(--color-card);
    border: 1px solid var(--color-border-light); border-radius: var(--radius);
    transition: all var(--transition);
}
.category-card:hover {
    transform: translateY(-2px); box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}
.category-icon {
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(45,74,124,0.08); color: var(--color-primary);
    margin-bottom: 14px;
}
.category-name {
    font-size: 16px; font-weight: 600; color: var(--color-text);
    margin-bottom: 6px;
}
.category-desc {
    font-size: 13px; color: var(--color-text-secondary);
    margin-bottom: 10px; line-height: 1.5;
}
.category-subcats {
    display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 12px;
}
.category-subcat {
    font-size: 11px; color: var(--color-primary);
    background: rgba(45,74,124,0.06); padding: 2px 8px;
    border-radius: 10px; white-space: nowrap;
}
.category-count {
    font-size: 12px; color: var(--color-text-light); font-weight: 500;
}

/* ==================== 文档卡片 ==================== */
.doc-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.doc-card, .doc-item {
    display: block; background: var(--color-card);
    border: 1px solid var(--color-border-light); border-radius: var(--radius);
    transition: all var(--transition);
    overflow: hidden;
}
.doc-card:hover, .doc-item:hover {
    transform: translateY(-2px); box-shadow: var(--shadow-md);
    border-color: rgba(45,74,124,0.2);
}
.doc-card-body, .doc-item-body { padding: 20px 22px; }
.doc-card-meta, .doc-item-meta {
    display: flex; align-items: center; gap: 10px; margin-bottom: 10px;
}
.doc-card-title, .doc-item-title {
    font-size: 17px; font-weight: 600; color: var(--color-text);
    margin-bottom: 8px; line-height: 1.4;
    transition: color var(--transition);
}
.doc-card:hover .doc-card-title, .doc-item:hover .doc-item-title {
    color: var(--color-primary);
}
.doc-card-summary, .doc-item-summary {
    font-size: 14px; color: var(--color-text-secondary);
    line-height: 1.6; margin-bottom: 14px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.doc-card-footer {
    display: flex; align-items: center; justify-content: space-between;
}
.doc-read-more { font-size: 13px; font-weight: 500; color: var(--color-primary); }

/* 文档列表（单列） */
.doc-list { display: flex; flex-direction: column; gap: 16px; }

/* 热门列表 */
.doc-list-popular { display: flex; flex-direction: column; gap: 12px; }
.popular-item {
    display: flex; align-items: center; gap: 16px; padding: 16px 20px;
    background: var(--color-card); border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm); transition: all var(--transition);
}
.popular-item:hover { box-shadow: var(--shadow); border-color: rgba(45,74,124,0.15); transform: translateX(2px); }
.popular-rank {
    width: 28px; height: 28px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; color: var(--color-text-light);
    background: var(--color-bg-alt); flex-shrink: 0;
}
.popular-item:nth-child(1) .popular-rank { background: var(--color-accent); color: #fff; }
.popular-item:nth-child(2) .popular-rank { background: #C5A572; color: #fff; }
.popular-item:nth-child(3) .popular-rank { background: #A8A8A8; color: #fff; }
.popular-info { flex: 1; min-width: 0; }
.popular-title {
    font-size: 15px; font-weight: 600; color: var(--color-text);
    margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.popular-item:hover .popular-title { color: var(--color-primary); }
.popular-meta {
    display: flex; gap: 12px; font-size: 12px; color: var(--color-text-light);
}

/* ==================== 页面布局（侧栏+内容） ==================== */
.page-layout {
    max-width: var(--container-width); margin: 0 auto;
    padding: 32px 24px; display: grid;
    grid-template-columns: 240px 1fr; gap: 32px;
}
.doc-layout { grid-template-columns: 220px 1fr 200px; gap: 28px; }

/* 侧栏 */
.sidebar {
    position: sticky; top: calc(var(--nav-height) + 24px);
    align-self: start;
}
.sidebar-header h3 {
    font-size: 13px; font-weight: 600; color: var(--color-text-light);
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 14px;
    padding-left: 4px;
}
.category-tree { display: flex; flex-direction: column; gap: 2px; }
.tree-node { margin-bottom: 2px; }

/* 分类行（展开按钮 + 链接） */
.tree-item-row { display: flex; align-items: center; gap: 0; border-radius: var(--radius-sm); }
.tree-item-row.tree-active { background: rgba(45,74,124,0.08); }

/* 展开/收起按钮 */
.tree-toggle {
    width: 24px; height: 28px; display: flex; align-items: center; justify-content: center;
    background: none; border: none; cursor: pointer; color: var(--color-text-light);
    flex-shrink: 0; transition: transform var(--transition); padding: 0;
}
.tree-toggle svg { transition: transform var(--transition); }
.tree-toggle.expanded svg { transform: rotate(90deg); }
.tree-toggle:hover { color: var(--color-primary); }
.tree-toggle-placeholder { width: 24px; flex-shrink: 0; }

/* 父分类链接 */
.tree-link {
    display: flex; align-items: center; gap: 6px;
    flex: 1; padding: 8px 10px; border-radius: var(--radius-sm);
    font-size: 14px; color: var(--color-text-secondary);
    transition: all var(--transition); min-width: 0;
}
.tree-link:hover { color: var(--color-primary); }
.tree-parent { font-weight: 600; color: var(--color-text); }
.tree-parent:hover { color: var(--color-primary); }
.tree-item-row.tree-active .tree-parent { color: var(--color-primary); }

/* 文件夹/文档图标 */
.tree-folder-icon { color: var(--color-accent); flex-shrink: 0; display: flex; }
.tree-child-icon { color: var(--color-text-light); flex-shrink: 0; display: flex; }

.tree-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.tree-count {
    font-size: 11px; color: var(--color-text-light);
    background: var(--color-bg-alt); padding: 1px 7px; border-radius: 10px;
    flex-shrink: 0;
}
.tree-item-row.tree-active .tree-count { background: rgba(45,74,124,0.15); color: var(--color-primary); }

/* 子分类容器（可展开/收起） */
.tree-children {
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
    padding-left: 24px;
}
.tree-children.show { max-height: 500px; }

/* 子分类链接 */
.tree-child {
    display: flex; align-items: center; gap: 6px;
    padding: 6px 10px; font-size: 13px; color: var(--color-text-secondary);
    border-radius: var(--radius-sm); transition: all var(--transition);
    border-left: 2px solid var(--color-border); margin-top: 1px;
}
.tree-child:hover { color: var(--color-primary); background: var(--color-hover); border-left-color: var(--color-primary); }
.tree-child.tree-active {
    color: var(--color-primary); background: rgba(45,74,124,0.06);
    font-weight: 500; border-left-color: var(--color-primary);
}
.tree-child.tree-active .tree-child-icon { color: var(--color-primary); }
.tree-child .tree-count { font-size: 10px; }

/* 子分类包裹容器 */
.tree-child-wrapper {
    margin-bottom: 2px;
}

/* 子分类行 */
.tree-child-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 子分类链接（可点击展开文档索引） */
.tree-child-row a.tree-child {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    font-size: 13px;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    flex: 1;
}
.tree-child-row a.tree-child:hover {
    background: var(--color-hover);
    color: var(--color-primary);
}
.tree-child-row a.tree-child.tree-active {
    color: var(--color-primary);
    font-weight: 600;
    background: rgba(59, 130, 246, 0.08);
}
[data-theme="dark"] .tree-child-row a.tree-child.tree-active {
    background: rgba(59, 130, 246, 0.15);
}
.tree-child-row a.tree-child .tree-child-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.tree-child-row a.tree-child.tree-active .tree-child-icon {
    color: var(--color-primary);
}

/* 文档索引展开按钮 */
.doc-index-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 20px; height: 20px; padding: 0;
    background: none; border: none; border-radius: 4px;
    color: var(--color-text-light); cursor: pointer;
    transition: all var(--transition); flex-shrink: 0;
}
.doc-index-toggle:hover {
    background: var(--color-hover); color: var(--color-primary);
}
.doc-index-toggle svg {
    transition: transform 0.2s ease;
}
.doc-index-toggle.expanded svg {
    transform: rotate(180deg);
}

/* 文档索引列表 */
.doc-index-list {
    max-height: 0; overflow: hidden;
    transition: max-height 0.3s ease;
    padding-left: 20px;
}
.doc-index-list.show {
    max-height: 300px;
    overflow-y: auto;
}

/* 文档索引项 */
.doc-index-item {
    display: flex; align-items: center; gap: 6px;
    padding: 5px 10px; font-size: 12px; color: var(--color-text-secondary);
    border-radius: var(--radius-sm); transition: all var(--transition);
    text-decoration: none; border-left: 2px solid transparent;
    margin: 1px 0;
}
.doc-index-item:hover {
    color: var(--color-primary); background: var(--color-hover);
    border-left-color: var(--color-primary);
}
.doc-index-item.doc-index-active {
    color: var(--color-primary);
    background: var(--color-hover);
    border-left-color: var(--color-primary);
    font-weight: 600;
}
.doc-index-item svg {
    flex-shrink: 0; color: var(--color-text-light);
}
.doc-index-item span {
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* 深色模式下的文档索引样式 */
[data-theme="dark"] .doc-index-toggle:hover {
    background: var(--color-hover);
}
[data-theme="dark"] .doc-index-item:hover {
    background: var(--color-hover);
}
[data-theme="dark"] .doc-index-item.doc-index-active {
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.15);
    border-left-color: var(--color-primary);
}

/* ==================== 页面主内容 ==================== */
.page-main { min-width: 0; }
.breadcrumb {
    display: flex; align-items: center; gap: 8px; font-size: 13px;
    color: var(--color-text-light); margin-bottom: 16px;
}
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-text-light); }
.breadcrumb-current { color: var(--color-text-secondary); }
.page-title {
    font-family: var(--font-serif); font-size: 28px; font-weight: 700;
    color: var(--color-primary-dark); margin-bottom: 8px;
}
.page-desc { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 24px; }

.list-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px; padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border-light);
}
.result-count { font-size: 14px; color: var(--color-text-secondary); }
.sort-toggle { display: flex; gap: 4px; background: var(--color-bg-alt); border-radius: var(--radius-sm); padding: 3px; }
.sort-toggle a {
    padding: 5px 14px; font-size: 13px; color: var(--color-text-secondary);
    border-radius: 6px; transition: all var(--transition);
}
.sort-toggle a.active { background: var(--color-card); color: var(--color-primary); font-weight: 600; box-shadow: var(--shadow-sm); }

/* ==================== 文档详情 ==================== */
.doc-article {
    max-width: 760px; min-width: 0;
}
.doc-title {
    font-family: var(--font-serif); font-size: 32px; font-weight: 700;
    color: var(--color-primary-dark); line-height: 1.3;
    margin-bottom: 16px;
}
.doc-meta {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    font-size: 14px; color: var(--color-text-secondary);
    padding-bottom: 20px; margin-bottom: 28px;
    border-bottom: 1px solid var(--color-border-light);
}
.doc-meta svg { color: var(--color-text-light); }
.doc-author { display: inline-flex; align-items: center; gap: 4px; }
.doc-meta-sep { color: var(--color-text-light); }
.doc-raw { display: none; }

/* ==================== Markdown 正文排版 ==================== */
.markdown-body { font-size: 16px; line-height: 1.8; color: var(--color-text); }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
    font-family: var(--font-serif); font-weight: 700;
    color: var(--color-primary-dark); margin-top: 1.8em; margin-bottom: 0.6em;
    line-height: 1.3;
}
.markdown-body h1 { font-size: 28px; }
.markdown-body h2 {
    font-size: 22px; padding-bottom: 0.3em;
    border-bottom: 1px solid var(--color-border-light);
}
.markdown-body h3 { font-size: 18px; }
.markdown-body h4 { font-size: 16px; }
.markdown-body p { margin: 0 0 1em; }
.markdown-body a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
.markdown-body a:hover { color: var(--color-primary-light); }
.markdown-body strong { font-weight: 700; color: var(--color-text); }
.markdown-body em { font-style: italic; }
.markdown-body ul, .markdown-body ol { margin: 0 0 1em; padding-left: 1.8em; }
.markdown-body li { margin-bottom: 0.4em; }
.markdown-body blockquote {
    margin: 1.2em 0; padding: 12px 20px;
    border-left: 4px solid var(--color-accent);
    background: rgba(232,163,61,0.06);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-secondary);
}
.markdown-body blockquote p { margin: 0; }
.markdown-body code {
    font-family: var(--font-mono); font-size: 0.88em;
    padding: 2px 6px; border-radius: 4px;
    background: rgba(45,74,124,0.08); color: var(--color-primary-dark);
}
.markdown-body pre {
    margin: 1.2em 0; padding: 16px 20px; border-radius: var(--radius-sm);
    background: #1e293b; overflow-x: auto;
    border: 1px solid #334155;
}
.markdown-body pre code {
    padding: 0; background: transparent; color: #e2e8f0;
    font-size: 14px; line-height: 1.6;
}
.markdown-body img {
    max-width: 100%; border-radius: var(--radius-sm);
    margin: 1em 0; box-shadow: var(--shadow);
}
.markdown-body table {
    width: 100%; border-collapse: collapse; margin: 1.2em 0;
    font-size: 14px;
}
.markdown-body th, .markdown-body td {
    padding: 10px 14px; border: 1px solid var(--color-border);
    text-align: left;
}
.markdown-body th { background: var(--color-bg-alt); font-weight: 600; }
.markdown-body tr:nth-child(even) { background: var(--color-bg-alt); }
.markdown-body hr {
    border: none; height: 1px; background: var(--color-border);
    margin: 2em 0;
}

/* 标签 */
.doc-tags {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    margin-top: 36px; padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
}
.doc-tags svg { color: var(--color-text-light); }
.doc-tag {
    padding: 4px 12px; font-size: 13px; color: var(--color-text-secondary);
    background: var(--color-bg-alt); border-radius: 16px;
    transition: all var(--transition);
}
.doc-tag:hover { color: var(--color-primary); background: rgba(45,74,124,0.08); }

/* 上下篇 */
.doc-nav {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
    margin-top: 28px;
}
.doc-nav-item {
    display: block; padding: 16px 20px;
    background: var(--color-card); border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm); transition: all var(--transition);
}
.doc-nav-item:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.doc-nav-next { text-align: right; }
.doc-nav-disabled { opacity: 0.4; pointer-events: none; }
.doc-nav-label { display: block; font-size: 12px; color: var(--color-text-light); margin-bottom: 4px; }
.doc-nav-title {
    display: block; font-size: 14px; font-weight: 500; color: var(--color-text);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* 相关文档 */
.doc-related { margin-top: 36px; }
.related-title {
    font-size: 16px; font-weight: 600; color: var(--color-text);
    margin-bottom: 14px;
}
.related-list {
    display: flex; flex-direction: column; gap: 8px;
}
.related-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px; background: var(--color-card);
    border: 1px solid var(--color-border-light); border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.related-item:hover { border-color: rgba(45,74,124,0.2); background: var(--color-hover); }
.related-name {
    font-size: 14px; color: var(--color-text); font-weight: 500;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.related-item:hover .related-name { color: var(--color-primary); }
.related-views { font-size: 12px; color: var(--color-text-light); flex-shrink: 0; margin-left: 12px; }

/* ==================== 目录导航 ==================== */
.toc-sidebar {
    position: sticky; top: calc(var(--nav-height) + 24px);
    align-self: start; max-height: calc(100vh - var(--nav-height) - 48px);
    overflow-y: auto;
}
.toc-title {
    font-size: 13px; font-weight: 600; color: var(--color-text-light);
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px;
}
.toc-list { display: flex; flex-direction: column; gap: 2px; }
.toc-list a {
    display: block; padding: 5px 10px; font-size: 13px;
    color: var(--color-text-secondary); border-left: 2px solid transparent;
    transition: all var(--transition); line-height: 1.4;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.toc-list a:hover { color: var(--color-primary); }
.toc-list a.active {
    color: var(--color-primary); border-left-color: var(--color-primary);
    font-weight: 500;
}
.toc-list a.toc-h3 { padding-left: 22px; font-size: 12px; }

/* ==================== 搜索页 ==================== */
.search-page { padding: 40px 24px; }
.search-header { margin-bottom: 32px; }
.search-page-title {
    font-family: var(--font-serif); font-size: 26px; font-weight: 700;
    color: var(--color-primary-dark); margin-bottom: 16px;
}
.search-form {
    display: flex; align-items: center; gap: 8px;
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); padding: 4px 4px 4px 16px;
    max-width: 560px; box-shadow: var(--shadow-sm);
}
.search-form svg { color: var(--color-text-light); }
.search-form input {
    flex: 1; border: none; padding: 10px 0; background: transparent;
    color: var(--color-text);
}
.search-form input:focus { outline: none; }
.search-form button {
    padding: 10px 20px; background: var(--color-primary); color: #fff;
    border-radius: var(--radius-sm); font-weight: 500; font-size: 14px;
}
.search-form button:hover { background: var(--color-primary-light); }
.search-count { font-size: 14px; color: var(--color-text-secondary); margin-top: 12px; }
.search-results { display: flex; flex-direction: column; gap: 16px; }
.search-result-item {
    display: block; padding: 20px 24px; background: var(--color-card);
    border: 1px solid var(--color-border-light); border-radius: var(--radius);
    transition: all var(--transition);
}
.search-result-item:hover { box-shadow: var(--shadow-md); border-color: rgba(45,74,124,0.15); transform: translateY(-1px); }
.result-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.result-title { font-size: 17px; font-weight: 600; color: var(--color-text); margin-bottom: 6px; }
.search-result-item:hover .result-title { color: var(--color-primary); }
.result-summary { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: 10px; }
.result-footer { display: flex; align-items: center; justify-content: space-between; }
.result-read { font-size: 13px; font-weight: 500; color: var(--color-primary); }
mark { background: rgba(232,163,61,0.25); color: var(--color-text); padding: 1px 3px; border-radius: 3px; }

/* ==================== 分页 ==================== */
.pagination {
    display: flex; justify-content: center; gap: 6px;
    margin-top: 36px; padding-bottom: 20px;
}
.page-btn {
    min-width: 36px; height: 36px; padding: 0 12px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 14px; color: var(--color-text-secondary);
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); transition: all var(--transition);
}
.page-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.page-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ==================== 页脚 ==================== */
.site-footer {
    background: var(--color-primary-dark); color: rgba(255,255,255,0.6);
    padding: 10px 24px;
}
.footer-container {
    max-width: var(--container-width); margin: 0 auto;
    display: flex; align-items: center; justify-content: center; gap: 12px;
    flex-wrap: wrap; font-size: 12px;
}
.footer-brand { font-weight: 600; color: #fff; }
.footer-copy { color: rgba(255,255,255,0.5); }
.footer-admin { color: rgba(255,255,255,0.4); }
.footer-admin:hover { color: #fff; }

/* ==================== 404 页面 ==================== */
.not-found {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: var(--color-bg); text-align: center; padding: 24px;
}
.not-found-code {
    font-family: var(--font-serif); font-size: 96px; font-weight: 900;
    color: var(--color-primary); line-height: 1; margin-bottom: 16px;
}
.not-found-text { font-size: 20px; color: var(--color-text); margin-bottom: 8px; font-weight: 500; }
.not-found-hint { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 24px; }

/* ==================== 动画 ==================== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.doc-card, .doc-item, .category-card, .search-result-item, .popular-item {
    animation: fadeIn 0.4s ease;
}

/* ==================== 桌面端导航 ==================== */
.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 6px 14px; font-size: 14px; font-weight: 500;
    color: var(--color-text-secondary); border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.nav-link:hover { color: var(--color-primary); background: var(--color-hover); }
.nav-link.nav-admin { color: var(--color-accent); font-weight: 600; }

/* 下拉菜单 */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
    display: flex; align-items: center; gap: 4px;
    padding: 6px 14px; font-size: 14px; font-weight: 500;
    color: var(--color-text-secondary); border-radius: var(--radius-sm);
    transition: all var(--transition); cursor: pointer;
    background: none; border: none; font-family: inherit;
}
.nav-dropdown-trigger:hover { color: var(--color-primary); background: var(--color-hover); }
.nav-dropdown-trigger svg { transition: transform var(--transition); }
.nav-dropdown:hover .nav-dropdown-trigger svg { transform: rotate(180deg); }
.nav-dropdown-menu {
    position: absolute; top: 100%; left: 0; min-width: 280px;
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); box-shadow: var(--shadow-lg);
    padding: 8px; opacity: 0; visibility: hidden;
    transform: translateY(-8px); transition: all var(--transition);
    z-index: 100; max-height: 480px; overflow-y: auto;
}
.nav-dropdown:hover .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-group { padding: 4px 0; border-bottom: 1px solid var(--color-border-light); }
.dropdown-group:last-child { border-bottom: none; }
.dropdown-group-title {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; font-size: 14px; font-weight: 600;
    color: var(--color-text); border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.dropdown-group-title:hover { background: var(--color-hover); color: var(--color-primary); }
.dropdown-icon { font-size: 16px; }
.dropdown-count {
    margin-left: auto; font-size: 12px; font-weight: 400;
    color: var(--color-text-light); background: var(--color-bg-alt);
    padding: 1px 8px; border-radius: 10px;
}
.dropdown-children { padding-left: 8px; }
.dropdown-child-link {
    display: flex; align-items: center; justify-content: space-between;
    padding: 6px 12px 6px 28px; font-size: 13px;
    color: var(--color-text-secondary); border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.dropdown-child-link:hover { background: var(--color-hover); color: var(--color-primary); }
.dropdown-child-link span { font-size: 11px; color: var(--color-text-light); }

/* ==================== 移动端抽屉 ==================== */
.mobile-drawer {
    position: fixed; top: 0; left: -300px; width: 300px; height: 100vh;
    background: var(--color-card); z-index: 1100;
    transition: left 0.3s ease; display: flex; flex-direction: column;
    box-shadow: var(--shadow-lg); overflow-y: auto;
}
.mobile-drawer.show { left: 0; }
.drawer-header { padding: 16px; border-bottom: 1px solid var(--color-border-light); }
.drawer-search {
    display: flex; align-items: center; gap: 8px;
    background: var(--color-bg-alt); border-radius: var(--radius-sm); padding: 8px 12px;
}
.drawer-search svg { color: var(--color-text-light); flex-shrink: 0; }
.drawer-search input {
    flex: 1; border: none; background: transparent;
    font-size: 14px; color: var(--color-text);
}
.drawer-search input:focus { outline: none; }
.drawer-nav { padding: 8px 0; flex: 1; }
.drawer-link {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 20px; font-size: 15px; color: var(--color-text);
    transition: all var(--transition); gap: 8px;
}
.drawer-link svg { color: var(--color-text-secondary); flex-shrink: 0; }
.drawer-link:hover, .drawer-link:active { background: var(--color-hover); color: var(--color-primary); }
.drawer-link span:first-child { flex: 1; }
.drawer-count {
    font-size: 12px; color: var(--color-text-light);
    background: var(--color-bg-alt); padding: 1px 8px; border-radius: 10px;
}
.drawer-parent { font-weight: 600; padding-left: 20px; }
.drawer-parent-toggle {
    width: 100%; text-align: left; font-family: inherit;
    cursor: pointer; background: none; border: none;
}
.drawer-parent-text { flex: 1; }
.drawer-arrow { transition: transform var(--transition); flex-shrink: 0; color: var(--color-text-light); }
.drawer-parent-toggle.expanded .drawer-arrow { transform: rotate(90deg); }
.drawer-all-link {
    font-size: 13px; color: var(--color-primary) !important;
    font-weight: 500; font-style: italic; border-left: 2px solid var(--color-primary);
    margin-top: 2px;
}
.drawer-children {
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
}
.drawer-children.show { max-height: 600px; }
.drawer-child {
    font-size: 14px; color: var(--color-text-secondary);
    padding-left: 36px; font-weight: 400;
}
.drawer-admin { color: var(--color-accent); margin-top: 8px; border-top: 1px solid var(--color-border-light); }

/* ==================== 移动端底部导航 ==================== */
.mobile-bottom-nav {
    display: none; position: fixed; bottom: 0; left: 0; right: 0;
    height: 56px; background: var(--color-card);
    border-top: 1px solid var(--color-border); z-index: 900;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}
.bottom-nav-item {
    flex: 1; display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 2px; font-size: 11px;
    color: var(--color-text-secondary); transition: color var(--transition);
    background: none; border: none; cursor: pointer; font-family: inherit;
}
.bottom-nav-item svg { color: var(--color-text-secondary); }
.bottom-nav-item:active, .bottom-nav-item:hover { color: var(--color-primary); }
.bottom-nav-item:active svg, .bottom-nav-item:hover svg { color: var(--color-primary); }

/* ==================== 移动端搜索弹层 ==================== */
.mobile-search-overlay {
    display: none; position: fixed; inset: 0; z-index: 1200;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    flex-direction: column; align-items: stretch;
    animation: fadeIn 0.2s ease;
}
.mobile-search-overlay.show { display: flex; }
.mobile-search-form {
    display: flex; align-items: center; gap: 10px;
    width: 100%; background: var(--color-card);
    padding: 14px 16px; box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--color-border);
    margin-top: 0;
}
.mobile-search-form svg { color: var(--color-text-light); flex-shrink: 0; }
.mobile-search-form input {
    flex: 1; border: none; font-size: 16px; background: transparent;
    color: var(--color-text); min-width: 0;
}
.mobile-search-form input:focus { outline: none; }
.mobile-search-form input::placeholder { color: var(--color-text-light); }
.mobile-search-form button {
    background: none; border: none; padding: 4px;
    color: var(--color-text-light); cursor: pointer; flex-shrink: 0;
}
.mobile-search-form button:active { color: var(--color-primary); }

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) {
    .doc-layout { grid-template-columns: 220px 1fr; }
    .toc-sidebar { display: none; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-desktop { display: none; }
    .nav-search { display: none; }
    .nav-container { gap: 12px; }

    .hero { padding: 40px 16px 32px; }
    .hero-title { font-size: 28px; }
    .hero-subtitle { font-size: 14px; margin-bottom: 20px; }
    .hero-search { border-radius: var(--radius-sm); padding: 4px; }
    .hero-search input { padding: 10px 8px; font-size: 14px; }
    .hero-search button { padding: 10px 16px; }

    .section { padding: 32px 0; }
    .section-header { flex-direction: column; gap: 4px; }
    .section-title { font-size: 20px; }

    .category-grid { grid-template-columns: 1fr; gap: 12px; }
    .category-card { padding: 16px; }

    .doc-grid { grid-template-columns: 1fr; }

    .page-layout, .doc-layout { grid-template-columns: 1fr; gap: 16px; padding: 16px 12px; }
    .sidebar { display: none; }
    .doc-title { font-size: 22px; }
    .doc-nav { grid-template-columns: 1fr; }
    .doc-meta { font-size: 13px; }

    .search-page { padding: 20px 12px; }
    .search-page-title { font-size: 20px; }
    .search-form { flex-wrap: wrap; }

    .markdown-body { font-size: 15px; }
    .markdown-body h1 { font-size: 22px; }
    .markdown-body h2 { font-size: 19px; }
    .markdown-body h3 { font-size: 17px; }

    .footer-container { gap: 8px; font-size: 11px; }
    .site-footer { padding-bottom: 60px; }

    /* 显示底部导航 */
    .mobile-bottom-nav { display: flex; }
    .main-content { padding-bottom: 56px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 24px; }
    .hero-tags { gap: 6px; }
    .hero-tag { font-size: 12px; padding: 4px 10px; }
    .doc-card-body, .doc-item-body { padding: 16px; }
}