/**
 * 字节AI开挂指南 - 清爽调研报告风格
 * 基于调研报告风格规范重构
 * 版本：2.0
 */

/* ============ CSS 变量定义 ============ */
:root {
    /* 品牌色彩 */
    --color-success: #059669;
    --color-success-light: #10B981;
    --color-success-dark: #047857;
    --color-danger: #E11D48;
    --color-danger-light: #FF7B72;
    --color-warning: #D97706;
    --color-warning-dark: #B45309;
    --color-info: #2563EB;
    --color-info-light: #54AEFF;
    --color-purple: #7C3AED;
    
    /* 文字颜色 */
    --color-text-primary: #1C1917;
    --color-text-secondary: #57534E;
    --color-text-tertiary: #78716C;
    --color-text-muted: #8B949E;
    
    /* 边框与背景 */
    --color-border: #E7E5E4;
    --color-border-light: #F5F5F4;
    --color-bg: #F8FAFB;
    --color-bg-card: #FFFFFF;
    --color-bg-table-header: #FAFAF9;
    
    /* 渐变 */
    --gradient-success: linear-gradient(135deg, #059669 0%, #10B981 100%);
    --gradient-badge: linear-gradient(135deg, #E6F7ED 0%, #E1F0F8 100%);
    --gradient-hero: linear-gradient(135deg, rgba(5, 150, 105, 0.06) 0%, rgba(37, 99, 235, 0.04) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(31, 35, 40, 0.06), 0 1px 2px rgba(31, 35, 40, 0.04);
    --shadow-card: 0 2px 8px rgba(31, 35, 40, 0.06), 0 1px 2px rgba(31, 35, 40, 0.04);
    --shadow-md: 0 4px 12px rgba(31, 35, 40, 0.08), 0 2px 4px rgba(31, 35, 40, 0.04);
    --shadow-hover: 0 6px 16px rgba(5, 150, 105, 0.15), 0 2px 6px rgba(5, 150, 105, 0.1);
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 999px;
    
    /* 字体 */
    --font-family: -apple-system, "system-ui", "Segoe UI", "Noto Sans SC", Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", Consolas, Monaco, monospace;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 15px;
    --font-size-lg: 17px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 28px;
    
    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 布局 */
    --content-max-width: 980px;
}

/* ============ 基础样式 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-size: var(--font-size-base);
}

a {
    color: var(--color-info);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover { color: var(--color-success); }

.container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-2xl) 0;
}

/* ============ 导航栏 ============ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--color-bg-table-header);
    color: var(--color-success);
}

/* 移动端导航优化 */
@media (max-width: 900px) {
    .nav-links { 
        display: none; 
    }
    
    /* 可选：移动端下拉菜单时显示 */
    .nav-links.show {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg-card);
        padding: var(--spacing-md);
        border-top: 1px solid var(--color-border-light);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-xs);
    }
    
    .nav-links.show a {
        padding: var(--spacing-md);
    }
}

/* ============ Header / Hero ============ */
.header, .hero {
    padding: 100px var(--spacing-lg) var(--spacing-2xl);
    text-align: center;
    background: var(--gradient-hero);
    position: relative;
}

.header::before, .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-success);
}

.hero-badge, .header-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gradient-badge);
    color: var(--color-info);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title, .header-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-success-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title .highlight, .text-gradient {
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle, .header-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

.hero-subtitle .funny {
    color: var(--color-success);
    font-weight: 600;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.hero-stat { text-align: center; }

.hero-stat-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-success);
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-success);
    color: white;
    box-shadow: 0 2px 8px rgba(5, 150, 105, 0.25);
}

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

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-success);
    color: var(--color-success);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============ 卡片 ============ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-success);
}

/* ============ Section Header ============ */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ============ TOC Grid ============ */
.toc-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg);
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.toc-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.toc-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-success);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.toc-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-success);
    box-shadow: var(--shadow-hover);
}

.toc-card:hover::before { transform: scaleX(1); }

.toc-number {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-border);
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-lg);
}

.toc-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.toc-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.toc-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.toc-card .toc-funny {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-success);
    font-weight: 600;
}

/* ============ 章节内容卡片 ============ */
.section-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-card);
}

.section-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

.section-number {
    width: 32px;
    height: 32px;
    background: var(--gradient-success);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    flex-shrink: 0;
}

.section-card-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
}

/* ============ 表格 ============ */
.table-wrap { overflow-x: auto; margin: var(--spacing-md) 0; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: top;
}

th {
    background: var(--color-bg-table-header);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

tbody tr:hover td { background: rgba(0, 0, 0, 0.02); }
td:first-child { font-weight: 500; color: var(--color-text-primary); }
tr:last-child td { border-bottom: none; }

/* ============ 引用框 ============ */
.quote-box, blockquote {
    background: var(--color-bg-table-header);
    border-left: 3px solid var(--color-info);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-md) 20px;
    margin: var(--spacing-md) 0;
}

.quote-box p, blockquote p {
    font-style: italic;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin: 0;
}

/* ============ 洞察框 ============ */
.insight-box, .funny-bubble {
    border-left: 3px solid var(--color-warning);
    background: rgba(217, 119, 6, 0.06);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-md) 20px;
    margin: var(--spacing-md) 0;
}

.insight-box.joke, .funny-bubble.joke {
    border-left-color: var(--color-success);
    background: rgba(5, 150, 105, 0.06);
}

.insight-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-warning-dark);
    margin-bottom: var(--spacing-sm);
}

.insight-content {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ============ 标签 ============ */
.tag, .status {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
}

.tag-green, .status-success { background: rgba(5, 150, 105, 0.12); color: var(--color-success); }
.tag-blue, .status-info { background: rgba(37, 99, 235, 0.12); color: var(--color-info); }
.tag-orange, .status-warning { background: rgba(217, 119, 6, 0.12); color: var(--color-warning-dark); }
.tag-purple { background: rgba(124, 58, 237, 0.12); color: var(--color-purple); }
.tag-red, .status-danger { background: rgba(225, 29, 72, 0.12); color: var(--color-danger); }

/* ============ 代码块 ============ */
.code-block, pre, code {
    font-family: var(--font-mono);
}

pre {
    background: #1C1917;
    color: #E6EDF3;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    overflow-x: auto;
}

code {
    background: var(--color-bg-table-header);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
    color: var(--color-danger);
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* ============ 列表 ============ */
ul, ol {
    padding-left: 24px;
    margin: var(--spacing-md) 0;
}

li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

li strong { color: var(--color-text-primary); }

/* ============ Intro Card ============ */
.intro-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-card);
}

.intro-card p { color: var(--color-text-secondary); }
.intro-card strong { color: var(--color-success); }

/* ============ 页脚 ============ */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-links a:hover { color: var(--color-success); }

.footer-bottom {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.footer-bottom p { margin: var(--spacing-xs) 0; }

/* ============ 工具类 ============ */
.text-center { text-align: center; }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-bold { font-weight: 700; color: var(--color-text-primary); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-900 { max-width: 900px; }

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

.animate-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .hero-title, .header-title { font-size: var(--font-size-xl); }
    .hero-stats { gap: var(--spacing-lg); }
    .hero-stat-value { font-size: var(--font-size-xl); }
    .section { padding: var(--spacing-xl) 0; }
    .section-card { padding: var(--spacing-md); }
    .toc-grid { grid-template-columns: 1fr; }
}

/* ============ Tab 导航 ============ */
.tab-nav {
    display: flex;
    flex-wrap: nowrap;
    gap: 4px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 6px;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    position: sticky;
    top: 70px;
    z-index: 100;
    overflow-x: auto;
}

.tab-btn {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab-btn:hover {
    background: var(--color-bg-table-header);
    color: var(--color-text-secondary);
}

.tab-btn.active {
    background: var(--gradient-success);
    color: #fff;
    box-shadow: 0 2px 8px rgba(5, 150, 105, 0.25);
}

.tab-btn-num {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.06);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
}

.tab-btn.active .tab-btn-num { background: rgba(255,255,255,0.2); }

.tab-panel { display: none; animation: fadeIn 0.3s ease-out; }
.tab-panel.active { display: block; }

/* ============ 对比布局 ============ */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

@media (max-width: 768px) {
    .comparison-grid { grid-template-columns: 1fr; }
}

.correct-path {
    border-left: 3px solid rgba(5, 150, 105, 0.5);
    background: rgba(5, 150, 105, 0.04);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.correct-path .path-title {
    color: var(--color-success);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.wrong-path {
    border-left: 3px solid rgba(225, 29, 72, 0.5);
    background: rgba(225, 29, 72, 0.04);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.wrong-path .path-title {
    color: var(--color-danger);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* ============ Stats Grid ============ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.stat-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.stat-value.success { color: var(--color-success); }
.stat-value.info { color: var(--color-info); }
.stat-value.warning { color: var(--color-warning); }
.stat-value.danger { color: var(--color-danger); }

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ============ 核心洞察 ============ */
.core-insight {
    background: var(--color-bg-card);
    border-left: 4px solid var(--color-danger);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-card);
}

.core-insight-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-danger);
    margin-bottom: 12px;
}

.core-insight-label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: 50%;
}

.core-insight-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-text-primary);
}

.core-insight-title em {
    color: var(--color-danger);
    font-style: normal;
}

/* ============ 章节概览 ============ */
.section-overview {
    background: linear-gradient(135deg, #F8FAF9 0%, #F3F7F5 100%);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-overview-label {
    position: absolute;
    top: 12px;
    left: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(5, 150, 105, 0.1);
    color: var(--color-success);
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
}

.section-overview-label::before { content: '📊'; font-size: 12px; }

/* ============ 时间线 ============ */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: var(--color-success);
    border-radius: 50%;
    border: 2px solid var(--color-bg);
}

.timeline-date {
    font-size: var(--font-size-xs);
    color: var(--color-success);
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.timeline-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============ 右侧悬浮导航 v2.0 ============ */
.page-sidebar-nav {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    width: 220px;
    max-height: 70vh;
    overflow-y: auto;
    overflow-x: visible;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0;
    opacity: 1;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-sidebar-nav:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
}

/* 导航头部 */
.page-sidebar-nav .nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-light);
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.05) 0%, rgba(37, 99, 235, 0.03) 100%);
}

.page-sidebar-nav .nav-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-success);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0;
    padding: 0;
    border: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.page-sidebar-nav .nav-title::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
}

.page-sidebar-nav ul {
    list-style: none;
    padding: 8px;
    margin: 0;
}

.page-sidebar-nav li {
    margin-bottom: 2px;
}

.page-sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    font-size: 13px;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    line-height: 1.4;
    position: relative;
    border-left: 2px solid transparent;
}

.page-sidebar-nav a:hover {
    color: var(--color-success);
    background: rgba(5, 150, 105, 0.06);
    border-left-color: rgba(5, 150, 105, 0.3);
}

.page-sidebar-nav a.active {
    color: var(--color-success);
    background: rgba(5, 150, 105, 0.1);
    font-weight: 600;
    border-left-color: var(--color-success);
}

/* 子级导航缩进 */
.page-sidebar-nav a.sub-item {
    padding-left: 24px;
    font-size: 12px;
}

/* 导航收起按钮 */
.page-sidebar-nav .nav-toggle {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--color-bg);
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.page-sidebar-nav .nav-toggle:hover {
    background: var(--color-success);
    color: #fff;
}

/* 收起状态 */
.page-sidebar-nav.collapsed {
    width: 48px;
    padding: 0;
    border-radius: var(--radius-lg);
}

.page-sidebar-nav.collapsed .nav-header {
    padding: 10px;
    justify-content: center;
    border-bottom: none;
    background: transparent;
}

.page-sidebar-nav.collapsed .nav-title,
.page-sidebar-nav.collapsed ul {
    display: none;
}

.page-sidebar-nav.collapsed .nav-toggle {
    width: 100%;
    height: 40px;
    background: transparent;
    border-radius: var(--radius-md);
}

.page-sidebar-nav.collapsed .nav-toggle:hover {
    background: rgba(5, 150, 105, 0.1);
    color: var(--color-success);
}

/* 滚动条美化 */
.page-sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.page-sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.page-sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

.page-sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* 有侧边栏时body调整 */
body.has-sidebar {
    /* 保留，供需要时使用 */
}

/* 平板和小屏幕 */
@media (max-width: 1400px) {
    .page-sidebar-nav {
        right: 16px;
        width: 200px;
    }
}

@media (max-width: 1200px) {
    .page-sidebar-nav {
        right: 12px;
        width: 180px;
    }
    
    .page-sidebar-nav a {
        padding: 8px 10px;
        font-size: 12px;
    }
}

@media (max-width: 1024px) {
    .page-sidebar-nav {
        display: none;
    }
}
/* cache bust 1772667463 */