/* 全局美化增强包 */
@import url('beautify.css');

/* ============================================
   平平的小破站 - 现代化主题样式
   版本: 2.0
   特性: 玻璃拟态、渐变动画、响应式设计
   ============================================ */

/* CSS变量定义 */
:root {
    /* 主色调 - 蓝紫渐变 */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --secondary-light: #f472b6;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.85);
    --bg-glass-strong: rgba(255, 255, 255, 0.95);
    
    /* 文字色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 间距 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* 字体 */
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* 容器宽度 */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* 暗色主题 */
[data-theme="dark"] {
    --primary: #818cf8;
    --primary-light: #a5b4fc;
    --primary-dark: #6366f1;
    --secondary: #f472b6;
    --accent: #22d3ee;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-glass: rgba(15, 23, 42, 0.85);
    --bg-glass-strong: rgba(15, 23, 42, 0.95);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --border-light: #1e293b;
    --shadow-glow: 0 0 20px rgba(129, 140, 248, 0.3);
}

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 选中文字样式 */
::selection {
    background: var(--primary);
    color: var(--text-inverse);
}

/* ============================================
   加载动画
   ============================================ */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-text {
    margin-top: var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

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

/* 进度条 */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    z-index: 10001;
    transition: width 0.3s ease;
}

/* ============================================
   导航栏 - 玻璃拟态效果
   ============================================ */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.main-header.scrolled {
    background: var(--bg-glass-strong);
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航链接 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
}

.nav-link {
    position: relative;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    margin-left: var(--space-sm);
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: rotate(15deg);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

/* ============================================
   主要内容区域
   ============================================ */
.main-content {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-xl) var(--container-padding);
}

/* ============================================
   英雄区域
   ============================================ */
.hero-section {
    position: relative;
    padding: var(--space-3xl) 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

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

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-glow {
    animation: glow-pulse 2s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 5px rgba(99, 102, 241, 0.4); }
    50% { box-shadow: 0 0 20px rgba(99, 102, 241, 0.6), 0 0 40px rgba(99, 102, 241, 0.3); }
}

/* ============================================
   卡片样式 - 玻璃拟态
   ============================================ */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.card:hover::before {
    opacity: 1;
}

.card-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    transition: transform var(--transition-bounce);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

/* ============================================
   文章列表样式
   ============================================ */
.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.article-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.article-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.article-thumb {
    width: 200px;
    height: 140px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.article-item:hover .article-thumb {
    transform: scale(1.05);
}

.article-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.article-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.article-item:hover .article-title {
    color: var(--primary);
}

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ============================================
   标签样式
   ============================================ */
.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
}

.tag:hover {
    background: var(--primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

.tag-secondary {
    background: rgba(236, 72, 153, 0.1);
    color: var(--secondary);
    border-color: rgba(236, 72, 153, 0.2);
}

.tag-secondary:hover {
    background: var(--secondary);
}

/* ============================================
   统计卡片区域
   ============================================ */
.stats-section {
    padding: var(--space-3xl) 0;
    background: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
}

.stat-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 1.5rem;
    margin: 0 auto var(--space-md);
    transition: transform var(--transition-bounce);
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(5deg);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ============================================
   关于站主区域
   ============================================ */
.about-section {
    padding: var(--space-3xl) 0;
    background: var(--bg-secondary);
}

.about-card {
    display: flex;
    gap: var(--space-2xl);
    align-items: center;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--border-color);
    max-width: 800px;
    margin: 0 auto;
}

.about-avatar {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--border-color);
    flex-shrink: 0;
}

.about-info h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.about-info p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

/* ============================================
   博客区域
   ============================================ */
.blog-section {
    padding: var(--space-3xl) 0;
    background: var(--bg-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.blog-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.blog-card-content {
    padding: var(--space-xl);
}

.blog-category {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.blog-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.blog-card h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card h3 a:hover {
    color: var(--primary);
}

.blog-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.blog-meta {
    display: flex;
    gap: var(--space-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.blog-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ============================================
   内容分类区域
   ============================================ */
.categories-section {
    padding: var(--space-3xl) 0;
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.category-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.category-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 1.75rem;
    margin: 0 auto var(--space-md);
    transition: transform var(--transition-bounce);
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   区域标题
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}
.code-block {
    position: relative;
    background: #1e1e2e;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: var(--space-lg) 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: #181825;
    border-bottom: 1px solid #313244;
}

.code-lang {
    font-size: 0.8rem;
    color: #6c7086;
    font-family: var(--font-mono);
}

.code-copy-btn {
    padding: var(--space-xs) var(--space-sm);
    background: transparent;
    border: 1px solid #313244;
    border-radius: var(--radius-md);
    color: #6c7086;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.code-copy-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.code-block pre {
    padding: var(--space-md);
    overflow-x: auto;
    margin: 0;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    color: #cdd6f4;
}

/* ============================================
   提示框样式
   ============================================ */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin: var(--space-md) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
    color: var(--primary-dark);
}

.alert-success {
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--accent);
    color: #0891b2;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: #f59e0b;
    color: #d97706;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
    color: #dc2626;
}

/* ============================================
   页脚样式
   ============================================ */
.main-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0 var(--space-xl);
    margin-top: auto;
    position: relative;
    overflow: hidden;
}

/* 页脚顶部装饰线 */
.main-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), var(--primary), transparent);
    opacity: 0.4;
}

/* 页脚背景光晕 */
.main-footer::after {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 200px;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

.footer-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-bottom {
    max-width: var(--container-max);
    margin: var(--space-xl) auto 0;
    padding: var(--space-lg) var(--container-padding) 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* 社交链接 */
.social-links {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: inherit;
}

.social-link i {
    position: relative;
    z-index: 1;
    transition: color 0.3s ease;
}

.social-link:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.2);
}

.social-link:hover::before {
    opacity: 1;
}

.social-link:hover i {
    color: var(--text-inverse);
}

/* 页脚底部信息 */
.footer-tech {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm, 0.5rem);
    margin-bottom: var(--space-md, 1rem);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.65rem;
    background: rgba(99, 102, 241, 0.07);
    color: var(--primary);
    border-radius: var(--radius-full, 9999px);
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.12);
    transition: all 0.25s ease;
    cursor: default;
}

.tech-badge:hover {
    background: rgba(99, 102, 241, 0.14);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

.tech-badge i {
    font-size: 0.9em;
}

.footer-sep {
    color: var(--border-color);
    margin: 0 0.25rem;
    user-select: none;
}

.footer-brand {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.25s ease;
}

.footer-brand:hover {
    color: var(--secondary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-copyright {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.1rem;
    font-size: 0.8rem;
    line-height: 2;
    color: var(--text-muted);
}

.footer-copyright i {
    margin-right: 0.15rem;
    font-size: 0.85em;
    opacity: 0.7;
}

.footer-icp {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.25s ease;
}

.footer-icp:hover {
    color: var(--primary);
}

.footer-icp img {
    width: 14px;
    height: 14px;
    vertical-align: middle;
    margin-right: 2px;
}

@media (max-width: 768px) {
    .footer-tech {
        gap: 0.4rem;
    }

    .footer-copyright {
        flex-direction: column;
        line-height: 2.2;
        gap: 0;
    }

    .footer-copyright .footer-sep {
        display: none;
    }

    .main-footer::after {
        width: 300px;
    }
}

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   搜索框样式
   ============================================ */
.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 4px;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12), 0 4px 20px rgba(99, 102, 241, 0.15);
    transform: translateY(-1px);
}

.search-icon {
    flex-shrink: 0;
    width: 44px;
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    padding-left: 8px;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    padding: 10px 12px;
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.search-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light, #818cf8));
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.search-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45);
}

.search-btn:active {
    transform: scale(0.96);
}

/* ============================================
   分页样式
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
}

.page-btn {
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
}

/* ============================================
   动画类
   ============================================ */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease forwards;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.6s ease forwards;
}

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

.scale-in {
    animation: scaleIn 0.5s ease forwards;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* 交错动画 */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .header-container {
        height: 60px;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-glass-strong);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--space-md);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-content {
        margin-top: 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .article-item {
        flex-direction: column;
    }
    
    .article-thumb {
        width: 100%;
        height: 200px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* 统计卡片移动端 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    /* 关于站主移动端 */
    .about-card {
        flex-direction: column;
        text-align: center;
    }
    
    .about-avatar {
        width: 120px;
        height: 120px;
        margin: 0 auto;
    }
    
    .about-info .social-links {
        justify-content: center;
    }
    
    /* 博客卡片移动端 */
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    /* 分类卡片移动端 */
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.9rem;
    }
    
    .card {
        padding: var(--space-md);
    }
}

/* ============================================
   打印样式
   ============================================ */
@media print {
    .main-header,
    .back-to-top,
    .page-loader {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ============================================
   特殊效果
   ============================================ */

/* 霓虹文字效果 */
.neon-text {
    text-shadow: 
        0 0 5px var(--primary),
        0 0 10px var(--primary),
        0 0 20px var(--primary),
        0 0 40px var(--primary);
}

/* 渐变边框 */
.gradient-border {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: calc(var(--radius-xl) + 2px);
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    z-index: -1;
}

/* 悬浮粒子效果容器 */
.particles-container {
    position: relative;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.5;
    animation: particle-float 10s infinite;
}

@keyframes particle-float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}