/* 暗黑太空主题样式 */

/* 导入艺术感字体 */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Rajdhani:wght@400;500;600;700&display=swap');

/* CSS变量定义 */
:root {
    /* 颜色变量 */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-secondary: #8b5cf6;
    --color-accent: #ec4899;
    --color-bg-dark: #0a0a0f;
    --color-bg-card: rgba(15, 15, 25, 0.9);
    --color-bg-sidebar: rgba(10, 10, 15, 0.95);
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #d1d5db;
    --color-text-muted: #9ca3af;
    --color-link: #60a5fa;
    --color-link-hover: #93c5fd;
    --color-code: #fbbf24;
    --color-border: rgba(99, 102, 241, 0.3);
    --color-shadow: rgba(99, 102, 241, 0.1);
    
    /* 尺寸变量 */
    --nav-height: 70px;
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 48px;
    --sidebar-right-width: 280px;
    --sidebar-width-md: 220px;
    --content-max-width: 900px;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* 间距变量 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    
    /* 过渡效果 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease-out;
    
    /* 阴影效果 */
    --shadow-sm: 0 2px 8px var(--color-shadow);
    --shadow-md: 0 4px 12px var(--color-shadow);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 4px 12px rgba(99, 102, 241, 0.3);
    
    /* 字体大小 */
    --font-size-xs: 0.85rem;
    --font-size-sm: 0.9rem;
    --font-size-base: 0.95rem;
    --font-size-md: 1.1rem;
    --font-size-lg: 1.2rem;
    --font-size-xl: 1.4rem;
    --font-size-2xl: 1.8rem;
    --font-size-3xl: 2.5rem;
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
html {
    /* Chrome 快速滚动时偶发会先绘制 root 背景；这里显式设置避免闪黑 */
    background-color: var(--color-bg-dark);
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    overflow-x: hidden;
    position: relative;
    min-height: 100%;
}

/* ====== Article page stability mode ======
   Some Chromium/GPU combinations can flash black tiles during fast scroll when there are:
   - huge fixed layers (e.g. animated star backgrounds),
   - backdrop-filter on large regions,
   - large shadows/alpha blending.
   For article pages, prioritize scroll stability over effects. */
html.mode-stable.page-article .stars,
html.mode-stable.page-article .stars2,
html.mode-stable.page-article .stars3 {
    display: none !important;
    animation: none !important;
}

html.mode-stable.page-article .top-nav,
html.mode-stable.page-article .keyword-sidebar,
html.mode-stable.page-article .popular-sidebar,
html.mode-stable.page-article .content-wrapper {
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
    box-shadow: none !important;
}

/* Make article surfaces fully opaque to avoid compositor alpha-blend glitches */
html.mode-stable.page-article body {
    background-color: #0a0a0f !important;
}

html.mode-stable.page-article .top-nav {
    background: #0a0a0f !important;
}

html.mode-stable.page-article .keyword-sidebar,
html.mode-stable.page-article .popular-sidebar {
    background: #0a0a0f !important;
}

html.mode-stable.page-article .content-wrapper {
    background: #0f0f19 !important;
}

/* Ultra-stable mode for article pages: kill animations/transitions and heavy paint effects */
html.mode-stable.page-article *,
html.mode-stable.page-article *::before,
html.mode-stable.page-article *::after {
    animation: none !important;
    transition: none !important;
    text-shadow: none !important;
}

html.mode-stable.page-article .nav-menu li a {
    background: transparent !important;
    box-shadow: none !important;
    border-color: rgba(99, 102, 241, 0.2) !important;
}

html.mode-stable.page-article .logo-text,
html.mode-stable.page-article .logo-text::before {
    filter: none !important;
    text-shadow: none !important;
}

html.mode-stable.page-article .top-nav::before,
html.mode-stable.page-article .top-nav::after,
html.mode-stable.page-article .nav-menu li a::before,
html.mode-stable.page-article .nav-menu li a::after {
    display: none !important;
}

/* Remove remaining fixed layers on article pages (most reliable way to avoid Chromium black tiles) */
html.mode-stable.page-article .top-nav {
    position: sticky !important;
    top: 0 !important;
}

html.mode-stable.page-article .main-content {
    margin-top: 0 !important; /* header is in-flow now */
}

/* Sidebar toggle buttons are fixed + shadow-heavy; hide on article pages for stability */
html.mode-stable.page-article .sidebar-toggle {
    display: none !important;
}

html.mode-stable.page-article .top-nav::after {
    animation: none !important;
    filter: none !important;
}

/* Undo compositor-forcing transforms on article pages */
html.mode-stable.page-article .content-wrapper {
    transform: none !important;
}

/* 星空背景动画 */
.stars, .stars2, .stars3 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Avoid negative z-index on huge fixed layers: Chromium can occasionally flash black during fast scroll */
    z-index: 0;
    pointer-events: none;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #eee, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 40px 70px, #fff, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 90px 40px, #ddd, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 130px 80px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 160px 120px, #ccc, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 200px 100px;
}

.stars {
    opacity: 0.7;
    animation: animateStars 180s linear infinite;
}

.stars2 {
    opacity: 0.5;
    background-size: 300px 150px;
    animation: animateStars 240s linear infinite;
}

.stars3 {
    opacity: 0.3;
    background-size: 400px 200px;
    animation: animateStars 300s linear infinite;
}

@keyframes animateStars {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-1000px);
    }
}

/* 顶部固定导航 - 增强艺术感样式 */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(180deg, 
        rgba(5, 5, 10, 0.98) 0%, 
        rgba(10, 10, 18, 0.97) 50%,
        rgba(15, 15, 25, 0.95) 100%);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 3px solid transparent;
    z-index: 1000;
    box-shadow: 
        0 4px 40px rgba(99, 102, 241, 0.2),
        0 2px 20px rgba(139, 92, 246, 0.15),
        inset 0 -1px 0 rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

/* 由 JS 在滚动时切换，避免频繁写入 inline style 触发重绘 */
.top-nav.scrolled {
    box-shadow: 0 2px 20px rgba(99, 102, 241, 0.2);
}

/* 导航栏底部发光边框 */
.top-nav::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent 0%,
        var(--color-primary) 15%, 
        var(--color-secondary) 35%, 
        var(--color-accent) 50%, 
        var(--color-secondary) 65%, 
        var(--color-primary) 85%,
        transparent 100%);
    background-size: 200% 100%;
    animation: navBorderGlow 3s linear infinite;
    filter: blur(1px);
}

/* 导航栏顶部微光 */
.top-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%,
        rgba(255, 255, 255, 0.1) 20%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.1) 80%,
        transparent 100%);
}

@keyframes navBorderGlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--nav-height);
}

/* Render mode toggle button */
.render-mode-toggle {
    margin-left: var(--spacing-md);
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid rgba(99, 102, 241, 0.35);
    background: rgba(99, 102, 241, 0.08);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
    white-space: nowrap;
}

.render-mode-toggle:hover {
    background: rgba(99, 102, 241, 0.18);
    border-color: rgba(99, 102, 241, 0.55);
    transform: translateY(-1px);
}

html.mode-stable .render-mode-toggle {
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.35);
}

html.mode-stable .render-mode-toggle:hover {
    background: rgba(16, 185, 129, 0.18);
    border-color: rgba(16, 185, 129, 0.55);
}

.logo a {
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 800;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    position: relative;
}

.logo a:hover {
    transform: translateY(-2px) scale(1.03);
}

.logo a:hover .logo-text {
    filter: brightness(1.3);
    text-shadow: 0 0 50px rgba(99, 102, 241, 0.8);
}

/* Logo 艺术感醒目样式 */
.logo-text {
    font-family: 'Rajdhani', 'Orbitron', 'Trebuchet MS', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, 
        #60a5fa 0%, 
        #6366f1 20%, 
        #8b5cf6 40%, 
        #ec4899 60%, 
        #f472b6 80%, 
        #60a5fa 100%);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoGradientShift 8s ease infinite;
    letter-spacing: 3px;
    position: relative;
    text-shadow: 0 0 60px rgba(99, 102, 241, 0.6);
}

/* Logo 发光效果层 */
.logo-text::before {
    content: '📚 Ken的知识库';
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    font-family: inherit;
    font-size: inherit;
    font-weight: inherit;
    letter-spacing: inherit;
    background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: blur(15px);
    opacity: 0.8;
    animation: logoGradientShift 8s ease infinite;
}

@keyframes logoGradientShift {
    0%, 100% { background-position: 0% 50%; }
    25% { background-position: 50% 100%; }
    50% { background-position: 100% 50%; }
    75% { background-position: 50% 0%; }
}

/* 主导航菜单 - 艺术感增强样式 */
.main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 1rem;
    margin: 0;
    padding: 0;
    margin-left: var(--spacing-lg);
}

.nav-menu li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-family: 'Orbitron', 'Rajdhani', 'Trebuchet MS', sans-serif;
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 16px 32px;
    border-radius: 10px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.1) 0%, 
        rgba(139, 92, 246, 0.06) 100%);
    border: 1px solid rgba(99, 102, 241, 0.2);
    box-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* 菜单项内部光晕效果 */
.nav-menu li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent);
    transition: left 0.5s ease;
}

/* 菜单项底部指示条 */
.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--color-primary), 
        var(--color-accent), 
        var(--color-secondary));
    transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    border-radius: 3px 3px 0 0;
}

.nav-menu li a:hover {
    color: #fff;
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.25) 0%, 
        rgba(139, 92, 246, 0.2) 50%,
        rgba(236, 72, 153, 0.15) 100%);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 
        0 8px 25px rgba(99, 102, 241, 0.3),
        0 4px 12px rgba(139, 92, 246, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.nav-menu li a:hover::before {
    left: 100%;
}

.nav-menu li a:hover::after {
    width: 70%;
}

.nav-menu li a.active {
    color: #fff;
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.35) 0%, 
        rgba(139, 92, 246, 0.25) 100%);
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow: 
        0 4px 20px rgba(99, 102, 241, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.nav-menu li a.active::after {
    width: 80%;
}

/* 主内容区域 */
.main-content {
    display: flex;
    margin-top: var(--nav-height);
    min-height: calc(100vh - var(--nav-height));
    transition: all var(--transition-normal);
    position: relative;
    z-index: 1; /* ensure above .stars layers */
}

/* ====== 侧边栏折叠按钮通用样式 ====== */
.sidebar-toggle {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 60px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 0 10px 10px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    font-family: Arial, sans-serif;
    line-height: 1;
    z-index: 1001;
    transition: all var(--transition-normal);
    box-shadow: 
        2px 0 12px rgba(99, 102, 241, 0.6),
        0 0 20px rgba(99, 102, 241, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    animation: sidebarTogglePulse 2s ease-in-out infinite;
}

@keyframes sidebarTogglePulse {
    0%, 100% {
        box-shadow: 
            2px 0 12px rgba(99, 102, 241, 0.6),
            0 0 20px rgba(99, 102, 241, 0.3);
    }
    50% {
        box-shadow: 
            3px 0 18px rgba(99, 102, 241, 0.8),
            0 0 25px rgba(139, 92, 246, 0.5);
    }
}

.sidebar-toggle:hover {
    width: 26px;
    background: linear-gradient(180deg, var(--color-primary-light), var(--color-accent));
    box-shadow: 
        4px 0 20px rgba(99, 102, 241, 0.8),
        0 0 30px rgba(139, 92, 246, 0.6);
    transform: translateY(-50%) scale(1.05);
    animation: none;
}

.sidebar-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.sidebar-toggle-left {
    left: var(--sidebar-width);
    margin-left: -2px;
}

body.left-collapsed .sidebar-toggle-left {
    left: var(--sidebar-width-collapsed);
}

.sidebar-toggle-right {
    right: var(--sidebar-right-width);
    margin-right: -2px;
    border-radius: 16px 0 0 16px;
    box-shadow: 
        -4px 0 20px rgba(99, 102, 241, 0.6),
        0 0 30px rgba(99, 102, 241, 0.3);
}

body.right-collapsed .sidebar-toggle-right {
    right: var(--sidebar-width-collapsed);
}

.sidebar-toggle-right:hover {
    box-shadow: 
        -6px 0 30px rgba(99, 102, 241, 0.8),
        0 0 50px rgba(139, 92, 246, 0.6);
}

/* ====== 左侧关键词索引 ====== */
.keyword-sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-sidebar);
    backdrop-filter: blur(15px);
    border-right: 1px solid var(--color-border);
    /* Use sticky instead of fixed to reduce compositor pressure on Chromium during fast scroll */
    position: sticky;
    top: var(--nav-height);
    height: calc(100vh - var(--nav-height));
    align-self: flex-start;
    overflow-y: auto;
    overflow-x: visible;
    z-index: 900;
    padding: var(--spacing-md);
    box-shadow: 2px 0 20px var(--color-shadow);
    transition: width var(--transition-normal), padding var(--transition-normal);
}

/* 左侧折叠状态 */
.keyword-sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
    padding: var(--spacing-md) var(--spacing-xs);
}

.keyword-sidebar.collapsed .keyword-header,
.keyword-sidebar.collapsed .keyword-list {
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

/* Toggle button position handled via body.left-collapsed class above */

.keyword-sidebar::-webkit-scrollbar {
    width: 6px;
}

.keyword-sidebar::-webkit-scrollbar-track {
    background: rgba(10, 10, 15, 0.5);
}

.keyword-sidebar::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.5);
    border-radius: 4px;
}

.keyword-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.7);
}

.keyword-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.3);
    transition: opacity var(--transition-normal);
}

.keyword-header h3 {
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.keyword-header h3::before {
    content: '🏷️';
    font-size: 1.1rem;
}

.keyword-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    transition: opacity var(--transition-normal);
}

.keyword-item {
    flex-shrink: 0;
}

.keyword-item a {
    text-decoration: none;
    color: var(--color-primary-light);
    font-size: 0.85rem;
    padding: 5px 12px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 16px;
    transition: all 0.3s ease;
    display: inline-block;
}

.keyword-item a:hover {
    color: #fff;
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

/* ====== 右侧热门文章侧边栏 ====== */
.popular-sidebar {
    width: var(--sidebar-right-width);
    background: var(--color-bg-sidebar);
    backdrop-filter: blur(15px);
    border-left: 1px solid var(--color-border);
    /* Use sticky instead of fixed to reduce compositor pressure on Chromium during fast scroll */
    position: sticky;
    top: var(--nav-height);
    height: calc(100vh - var(--nav-height));
    align-self: flex-start;
    overflow-y: auto;
    overflow-x: visible;
    z-index: 900;
    padding: var(--spacing-md);
    box-shadow: -2px 0 20px var(--color-shadow);
    transition: width var(--transition-normal), padding var(--transition-normal);
}

/* 右侧折叠状态 */
.popular-sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
    padding: var(--spacing-md) var(--spacing-xs);
}

.popular-sidebar.collapsed .popular-header,
.popular-sidebar.collapsed .popular-list {
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}


.popular-sidebar::-webkit-scrollbar {
    width: 6px;
}

.popular-sidebar::-webkit-scrollbar-track {
    background: rgba(10, 10, 15, 0.5);
}

.popular-sidebar::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.5);
    border-radius: 4px;
}

.popular-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.3);
    transition: opacity var(--transition-normal);
}

.popular-header h3 {
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.popular-header h3::before {
    content: '🔥';
    font-size: 1.1rem;
}

.popular-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: opacity var(--transition-normal);
}

.popular-item {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--border-radius-md);
    padding: 12px;
    transition: all var(--transition-normal);
}

.popular-item:hover {
    background: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.35);
    transform: translateX(-3px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.15);
}

.popular-item a {
    text-decoration: none;
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    display: block;
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.popular-item a:hover {
    color: var(--color-primary-light);
}

.popular-item-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.popular-item-views {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--color-accent);
    font-weight: 500;
}

.popular-item-views::before {
    content: '👁️';
    font-size: 0.8rem;
}

.popular-item-rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 700;
    color: #fff;
    margin-right: 8px;
}

.popular-item:nth-child(1) .popular-item-rank {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

.popular-item:nth-child(2) .popular-item-rank {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
}

.popular-item:nth-child(3) .popular-item-rank {
    background: linear-gradient(135deg, #cd7f32, #b8860b);
}

/* ====== 中间主内容 ====== */
.content-area {
    flex: 1;
    /* Sidebars are in-flow (sticky) now, so margins are unnecessary */
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding: var(--spacing-lg);
    position: relative;
    transition: margin var(--transition-normal);
}

/* 布局自适应 - 左侧折叠 */
body.left-collapsed .content-area {
    margin-left: var(--sidebar-width-collapsed);
}

/* 布局自适应 - 右侧折叠 */
body.right-collapsed .content-area {
    margin-right: var(--sidebar-width-collapsed);
}

/* 布局自适应 - 两侧都折叠 */
body.left-collapsed.right-collapsed .content-area {
    margin-left: var(--sidebar-width-collapsed);
    margin-right: var(--sidebar-width-collapsed);
}

/* 页脚自适应 */
body.left-collapsed .footer {
    margin-left: var(--sidebar-width-collapsed);
}

body.right-collapsed .footer {
    margin-right: var(--sidebar-width-collapsed);
}

body.left-collapsed.right-collapsed .footer {
    margin-left: var(--sidebar-width-collapsed);
    margin-right: var(--sidebar-width-collapsed);
}

.content-wrapper {
    max-width: var(--content-max-width);
    margin: 0 auto;
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

/* Markdown内容样式 */
.markdown-content {
    color: var(--color-text-primary);
    animation: fadeIn var(--transition-slow);
}

.markdown-content h1 {
    color: var(--color-primary);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.markdown-content h2 {
    color: var(--color-primary-light);
    font-size: var(--font-size-2xl);
    margin: var(--spacing-lg) 0 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
}

.markdown-content h3 {
    color: #a78bfa;
    font-size: var(--font-size-xl);
    margin: 25px 0 var(--spacing-sm);
}

.markdown-content p {
    margin-bottom: 15px;
    color: var(--color-text-secondary);
}

.markdown-content ul,
.markdown-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.markdown-content li {
    margin-bottom: 8px;
    color: #d1d5db;
}

.markdown-content a {
    color: #60a5fa;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    padding: 0 2px;
}

.markdown-content a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: #60a5fa;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.markdown-content a:hover {
    color: #93c5fd;
}

.markdown-content a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.markdown-content code {
    background: rgba(99, 102, 241, 0.1);
    color: #fbbf24;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

.markdown-content pre {
    background: rgba(10, 10, 15, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 20px 0;
}

.markdown-content pre code {
    background: none;
    color: #e0e0e0;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

.markdown-content blockquote {
    border-left: 3px solid #6366f1;
    padding-left: 15px;
    margin: 20px 0;
    color: #9ca3af;
    font-style: italic;
}

.markdown-content hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.5), transparent);
    margin: 30px 0;
}

/* ====== 3D 星空效果 ====== */
.starfield-fullscreen {
    padding: 0 !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    max-width: none !important;
    width: 100% !important;
    margin: 0 !important;
}

.starfield-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
    overflow: hidden;
    background: linear-gradient(135deg, 
        rgba(10, 10, 20, 0.95) 0%, 
        rgba(15, 15, 35, 0.9) 50%, 
        rgba(20, 10, 30, 0.95) 100%);
    margin: 0;
    border: none;
    box-shadow: none;
}

/* 首页内容区域全屏适配 */
.content-area:has(.starfield-fullscreen) {
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--nav-height));
}

.content-area:has(.starfield-fullscreen) .starfield-fullscreen {
    flex: 1;
    position: relative;
    min-height: 0;
}

#starfield-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#starfield-canvas:active {
    cursor: grabbing;
}

/* 响应式星空容器 */
/* 星空容器始终填满父元素 */
#starfield-canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* ====== 文章卡片网格 ====== */
.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.article-card {
    background: linear-gradient(135deg, 
        rgba(15, 15, 30, 0.9) 0%, 
        rgba(20, 20, 40, 0.85) 100%);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    display: block;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--color-primary) 0%, 
        var(--color-secondary) 50%, 
        var(--color-accent) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow: 
        0 15px 40px rgba(99, 102, 241, 0.2),
        0 5px 15px rgba(139, 92, 246, 0.15);
}

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

.article-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-path {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-card-path::before {
    content: '📁';
    font-size: 0.9rem;
}

.article-card-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.article-card-keyword {
    font-size: 0.75rem;
    padding: 3px 10px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 20px;
    color: var(--color-primary-light);
    transition: all 0.3s ease;
}

.article-card:hover .article-card-keyword {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.5);
}

/* 子目录卡片 */
.subdir-card {
    background: linear-gradient(135deg, 
        rgba(139, 92, 246, 0.1) 0%, 
        rgba(99, 102, 241, 0.05) 100%);
    border: 1px dashed rgba(139, 92, 246, 0.4);
}

.subdir-card::before {
    background: linear-gradient(90deg, 
        var(--color-secondary) 0%, 
        var(--color-primary) 100%);
}

.subdir-card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.subdir-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.subdir-card-count {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* 目录页面标题区域 */
.directory-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.directory-header h2 {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
}

/* 响应式卡片 */
@media (max-width: 768px) {
    .article-cards {
        grid-template-columns: 1fr;
    }
    
    .article-card {
        padding: var(--spacing-sm);
    }
}

/* 页脚 */
.footer {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(10, 10, 15, 0.95);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-border);
    /* Sidebars are in-flow (sticky) now, so footer should span full width */
    margin-left: 0 !important;
    margin-right: 0 !important;
    position: relative;
    z-index: 1;
    transition: margin var(--transition-normal);
}

/* 搜索结果页面 */
.search-results {
    margin-top: 20px;
}

.result-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
}

.result-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.result-title {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.result-title a {
    color: #6366f1;
    text-decoration: none;
    transition: all 0.3s ease;
}

.result-title a:hover {
    color: #818cf8;
    text-decoration: underline;
}

.result-meta {
    font-size: 0.85rem;
    color: #9ca3af;
}

/* 响应式设计 */
@media (max-width: 1400px) {
    .content-area {
        padding: 25px 20px;
    }
    
    .popular-sidebar {
        width: 240px;
    }
    
    .content-area {
        margin-right: 240px;
    }
    
    .footer {
        margin-right: 240px;
    }
    
    body.right-collapsed .content-area,
    body.right-collapsed .footer {
        margin-right: var(--sidebar-width-collapsed);
    }
}

@media (max-width: 1200px) {
    .content-area {
        padding: 20px 15px;
    }
    
    .content-wrapper {
        padding: 25px;
    }
    
    .keyword-sidebar {
        width: var(--sidebar-width-md);
    }
    
    .content-area {
        margin-left: var(--sidebar-width-md);
    }
    
    .footer {
        margin-left: var(--sidebar-width-md);
    }
    
    body.left-collapsed .content-area,
    body.left-collapsed .footer {
        margin-left: var(--sidebar-width-collapsed);
    }
}

@media (max-width: 992px) {
    /* 平板端 - 右侧默认隐藏 */
    .popular-sidebar {
        display: none;
    }
    
    .content-area {
        margin-right: 0;
    }
    
    .footer {
        margin-right: 0;
    }
    
    .keyword-sidebar {
        width: var(--sidebar-width-md);
    }
    
    .content-area {
        margin-left: var(--sidebar-width-md);
    }
    
    .footer {
        margin-left: var(--sidebar-width-md);
    }
    
    body.left-collapsed .content-area,
    body.left-collapsed .footer {
        margin-left: var(--sidebar-width-collapsed);
    }
}

/* 移动端菜单切换按钮 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.mobile-menu-toggle:hover {
    color: var(--color-primary-light);
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    /* 移动端导航 */
    .nav-container {
        padding: 0 15px;
    }
    
    /* 显示移动端菜单按钮 */
    .mobile-menu-toggle {
        display: block;
    }
    
    /* 移动端导航菜单 */
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: -100%;
        width: 85%;
        max-width: 320px;
        height: calc(100vh - var(--nav-height));
        background: var(--color-bg-sidebar);
        backdrop-filter: blur(15px);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-md);
        transition: left var(--transition-normal);
        box-shadow: 2px 0 30px var(--color-shadow);
        z-index: 999;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu li a {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
        border-bottom: 1px solid var(--color-border);
        background: transparent;
        border-radius: 0;
    }
    
    .nav-menu li a:hover {
        background: rgba(99, 102, 241, 0.1);
        transform: none;
        box-shadow: none;
    }
    
    /* 移动端侧边栏 - 隐藏 */
    .keyword-sidebar,
    .popular-sidebar {
        display: none;
    }
    
    /* 内容区域占满宽度 */
    .content-area {
        margin-left: 0;
        margin-right: 0;
        padding: var(--spacing-md);
    }
    
    body.left-collapsed .content-area,
    body.right-collapsed .content-area,
    body.left-collapsed.right-collapsed .content-area {
        margin-left: 0;
        margin-right: 0;
    }
    
    .footer {
        margin-left: 0;
        margin-right: 0;
    }
    
    body.left-collapsed .footer,
    body.right-collapsed .footer,
    body.left-collapsed.right-collapsed .footer {
        margin-left: 0;
        margin-right: 0;
    }
    
    .content-wrapper {
        padding: var(--spacing-md);
    }
    
    .markdown-content h1 {
        font-size: 1.8rem;
    }
    
    .markdown-content h2 {
        font-size: 1.4rem;
    }
    
    /* 面包屑在移动端换行 */
    .breadcrumb {
        flex-wrap: wrap;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .logo-text {
        font-size: 1rem;
    }
    
    .nav-menu {
        gap: 0.5rem;
    }
    
    .content-area {
        padding: 12px;
    }
    
    .content-wrapper {
        padding: 15px;
        border-radius: 8px;
    }
    
    .markdown-content h1 {
        font-size: 1.6rem;
    }
    
    .markdown-content h2 {
        font-size: 1.2rem;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
        padding: 8px 10px;
    }
    
    .breadcrumb-separator {
        margin: 0 4px;
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页面加载完成后添加的类 */
.loaded .markdown-content {
    animation: fadeIn var(--transition-slow);
}

/* 高亮效果 */
.highlight {
    background: linear-gradient(120deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 500;
}

/* 卡片样式 */
.card {
    background: rgba(15, 15, 25, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.5);
}

/* ====== 性能优化 ====== */

/* Avoid blanket will-change (can create too many compositor layers and trigger black flashes on Chromium) */
.nav-menu li a:hover,
.keyword-item a:hover,
.popular-item:hover,
.card:hover,
.sidebar-toggle:hover {
    will-change: transform;
}

/*
  滚动性能保护：
  在部分浏览器/显卡组合下，多个 fixed 全屏层 + backdrop-filter + 动画 transform
  在快速滚动时可能触发合成层重建，表现为短暂黑屏闪烁。
  这里在“滚动中”临时降级昂贵特效，滚动结束后恢复。
*/
html.is-scrolling .stars,
html.is-scrolling .stars2,
html.is-scrolling .stars3 {
    animation-play-state: paused;
}

html.is-scrolling .top-nav::after {
    animation-play-state: paused;
}

html.is-scrolling .top-nav,
html.is-scrolling .keyword-sidebar,
html.is-scrolling .popular-sidebar,
html.is-scrolling .content-wrapper {
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
    transition: none !important;
    /* Reduce large-area blending/shadows during fast scroll to avoid Chromium black flashes */
    box-shadow: none !important;
    filter: none !important;
}

html.is-scrolling .content-wrapper,
html.is-scrolling .keyword-sidebar,
html.is-scrolling .popular-sidebar,
html.is-scrolling .top-nav {
    /* Prefer opaque surfaces while scrolling */
    background-color: #0a0a0f !important;
}

/*
  Chromium fallback:
  Chrome/Chromium 在“快速滚动 + 多个 fixed 层 + backdrop-filter/动画”场景下
  部分机器会出现短暂黑屏闪烁（合成层抖动）。这里直接降级这些昂贵效果，
  优先保证滚动稳定性。
*/
html.ua-chromium .top-nav,
html.ua-chromium .keyword-sidebar,
html.ua-chromium .popular-sidebar,
html.ua-chromium .content-wrapper {
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
}

html.ua-chromium .stars,
html.ua-chromium .stars2,
html.ua-chromium .stars3 {
    /* Hard fallback: remove heavy fixed layers entirely to avoid compositor black flashes */
    display: none !important;
    animation: none !important;
}

html.ua-chromium .top-nav::after {
    display: none !important;
    animation: none !important;
    filter: none !important;
}

html.ua-chromium .top-nav {
    /* Reduce expensive large shadows/gradients during scroll compositing */
    background: rgba(10, 10, 18, 0.97) !important;
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.12) !important;
    /* Chromium safeguard: avoid contain-related paint bugs on fast scroll */
    contain: none !important;
}

html.ua-chromium .keyword-sidebar,
html.ua-chromium .popular-sidebar {
    /* Avoid large-area alpha blending during fast scroll (can flash black on Chromium) */
    background: #0a0a0f !important;
    /* Key fix: reduce fixed layers. Sticky keeps the sidebar visible without forcing compositor to juggle big fixed surfaces */
    position: sticky !important;
    top: var(--nav-height) !important;
    left: auto !important;
    right: auto !important;
    height: calc(100vh - var(--nav-height)) !important;
    box-shadow: none !important;
    contain: none !important;
}

html.ua-chromium .content-wrapper {
    /* Opaque surface reduces compositor blend cost and prevents blank flashes */
    background: #0f0f19 !important;
    box-shadow: none !important;
    /* Create a stable stacking context / compositor layer to reduce blank paints */
    isolation: isolate !important;
    transform: translateZ(0);
    contain: none !important;
}

html.ua-chromium .content-area,
html.ua-chromium .main-content {
    contain: none !important;
}

/* Chromium layout override: when sidebars are sticky (in-flow), content should not reserve space with margins */
html.ua-chromium .content-area {
    margin-left: 0 !important;
    margin-right: 0 !important;
}

html.ua-chromium .footer {
    margin-left: 0 !important;
    margin-right: 0 !important;
}

/* Even harder safeguard during active scroll on Chromium: remove heavy fixed background layers + big shadows */
html.ua-chromium.is-scrolling .stars,
html.ua-chromium.is-scrolling .stars2,
html.ua-chromium.is-scrolling .stars3 {
    display: none !important;
}

html.ua-chromium.is-scrolling .content-wrapper,
html.ua-chromium.is-scrolling .keyword-sidebar,
html.ua-chromium.is-scrolling .popular-sidebar,
html.ua-chromium.is-scrolling .top-nav {
    box-shadow: none !important;
    filter: none !important;
}

/* Chromium: disable entrance animation (can interact badly with fast scroll paints) */
html.ua-chromium .markdown-content {
    animation: none !important;
}

/* NOTE: contain can be a net win, but some Chromium/GPU combos exhibit paint glitches with large fixed regions.
   Prefer stability over micro-optimizations here, especially since we already have scroll-time fallbacks. */

/* 图片优化 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* ====== 打印样式 ====== */
@media print {
    /* 隐藏不必要的元素 */
    .stars,
    .stars2,
    .stars3,
    .top-nav,
    .keyword-sidebar,
    .popular-sidebar,
    .footer,
    .mobile-menu-toggle,
    .sidebar-toggle {
        display: none !important;
    }
    
    /* 重置布局 */
    body {
        background: white;
        color: black;
    }
    
    .main-content {
        display: block;
        margin: 0;
        padding: 0;
    }
    
    .content-area {
        margin: 0;
        padding: 20px;
    }
    
    .content-wrapper {
        background: white;
        box-shadow: none;
        border: none;
        padding: 0;
    }
    
    .markdown-content {
        color: black;
    }
    
    .markdown-content h1,
    .markdown-content h2,
    .markdown-content h3 {
        color: black;
        page-break-after: avoid;
    }
    
    .markdown-content a {
        color: black;
        text-decoration: underline;
    }
    
    .markdown-content a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
    
    .markdown-content code,
    .markdown-content pre {
        background: #f5f5f5;
        color: black;
        border: 1px solid #ddd;
    }
    
    /* 避免分页问题 */
    .markdown-content h1,
    .markdown-content h2,
    .markdown-content h3,
    .markdown-content p,
    .markdown-content li,
    .markdown-content pre {
        page-break-inside: avoid;
    }
}

/* ====== 辅助功能增强 ====== */

/* 键盘导航可见性 */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 减少动画（尊重用户偏好） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .stars,
    .stars2,
    .stars3 {
        animation: none;
        opacity: 0.3;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --color-bg-dark: #000000;
        --color-text-primary: #ffffff;
        --color-border: rgba(255, 255, 255, 0.5);
    }
}

/* ====== 加载状态样式 ====== */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(99, 102, 241, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.error-message {
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--border-radius-md);
    color: #fca5a5;
    text-align: center;
}

/* ====== Toast消息动画 ====== */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

.toast-message {
    border: 1px solid var(--color-border);
}

/* ====== 面包屑导航 - 增强样式 ====== */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
}

.breadcrumb::before {
    content: '📍';
    margin-right: 8px;
    font-size: 1rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--color-text-muted);
}

.breadcrumb-item a {
    color: var(--color-link);
    text-decoration: none;
    padding: 2px 6px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--color-link-hover);
    background: rgba(99, 102, 241, 0.1);
}

.breadcrumb-separator {
    margin: 0 2px;
    color: var(--color-text-muted);
    opacity: 0.6;
}

.breadcrumb-item.current {
    color: var(--color-text-primary);
    font-weight: 500;
}

.breadcrumb-item.current span {
    padding: 2px 8px;
    background: rgba(99, 102, 241, 0.15);
    border-radius: 4px;
}

/* ====== 标签云样式 ====== */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 16px;
    font-size: var(--font-size-xs);
    color: var(--color-primary-light);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}