/* =====================================================
   苏屿 / RusBrook - 个人博客网站样式表
   高端深色科技风格 | 赛博朋克青色/绿色强调色
   ===================================================== */

/* =====================================================
   1. CSS 变量定义 - 全局主题配置
   ===================================================== */
:root {
    /* 深色背景色系 */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --bg-card-hover: #22222e;
    
    /* 赛博朋克强调色 - 青色到绿色渐变 */
    --accent-primary: #00fff2;
    --accent-secondary: #00ff88;
    --accent-gradient: linear-gradient(135deg, #00fff2 0%, #00ff88 100%);
    
    /* 文字颜色 */
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    /* 边框与分隔线 */
    --border-color: rgba(0, 255, 242, 0.15);
    --border-hover: rgba(0, 255, 242, 0.4);
    
    /* 发光效果 */
    --glow-primary: 0 0 20px rgba(0, 255, 242, 0.3);
    --glow-strong: 0 0 40px rgba(0, 255, 242, 0.5);
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, sans-serif;
    --font-code: 'Fira Code', 'JetBrains Mono', monospace;
}

/* =====================================================
   2. 基础重置与全局样式
   ===================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* 链接样式 */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 列表样式 */
ul, ol {
    list-style: none;
}

/* 按钮基础样式 */
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* =====================================================
   3. 排版系统
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
h4 { font-size: 1.2rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

code {
    font-family: var(--font-code);
    background: var(--bg-card);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--accent-primary);
}

pre {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

pre code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
}

/* =====================================================
   4. 容器与布局
   ===================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* 网格布局 */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* =====================================================
   5. 导航栏
   ===================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: var(--spacing-xs) 0;
    background: rgba(10, 10, 15, 0.95);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.3rem;
    font-weight: 700;
}

.nav-logo .logo-cn {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo .logo-en {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.9rem;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--accent-primary);
    transition: all var(--transition-fast);
}

/* =====================================================
   6. Hero 区域
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: var(--spacing-lg);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 8px 16px;
    background: rgba(0, 255, 242, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    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 {
    margin-bottom: var(--spacing-md);
}

.hero-title .cn-name {
    display: block;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.hero-title .en-name {
    display: block;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-subtitle .typing-text {
    color: var(--accent-primary);
    border-right: 2px solid var(--accent-primary);
    padding-right: 4px;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { border-color: transparent; }
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* =====================================================
   7. 按钮组件
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    box-shadow: var(--glow-primary);
}

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

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.btn-secondary:hover {
    background: rgba(0, 255, 242, 0.1);
    transform: translateY(-2px);
    color: var(--accent-primary);
}

.btn-ghost {
    color: var(--text-secondary);
    padding: 10px 20px;
}

.btn-ghost:hover {
    color: var(--accent-primary);
}

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

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

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 242, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-primary);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.card-link:hover {
    gap: 10px;
}

/* =====================================================
   9. 标签组件
   ===================================================== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: rgba(0, 255, 242, 0.08);
    border: 1px solid rgba(0, 255, 242, 0.2);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--accent-primary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(0, 255, 242, 0.15);
    border-color: var(--accent-primary);
}

.tag-secondary {
    background: rgba(0, 255, 136, 0.08);
    border-color: rgba(0, 255, 136, 0.2);
    color: var(--accent-secondary);
}

/* =====================================================
   10. 技能展示
   ===================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.skill-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.skill-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =====================================================
   10. 技术栈卡片（新）
   ===================================================== */
.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.tech-stack-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.tech-stack-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}

.tech-stack-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.tech-stack-header svg {
    width: 24px;
    height: 24px;
    color: var(--accent-primary);
}

.tech-stack-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.tech-stack-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tech-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tech-name {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.tech-name.highlight {
    color: var(--accent-primary);
}

.tech-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tech-stack-guide {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
}

.tech-stack-guide svg {
    width: 14px;
    height: 14px;
    color: var(--accent-secondary);
    flex-shrink: 0;
}

.tech-stack-guide a {
    color: var(--accent-secondary);
    transition: color var(--transition-fast);
}

.tech-stack-guide a:hover {
    color: var(--accent-primary);
}

/* =====================================================
   11. 技能等级徽章（新）
   ===================================================== */
.skill-level-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-right: 8px;
}

.skill-level-badge.master {
    background: rgba(0, 255, 242, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(0, 255, 242, 0.3);
}

.skill-level-badge.skilled {
    background: rgba(0, 255, 136, 0.15);
    color: var(--accent-secondary);
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.skill-bar-name {
    display: flex;
    align-items: center;
}

/* =====================================================
   12. 彩色标签（新）
   ===================================================== */
.tag.tag-lang {
    background: rgba(0, 255, 242, 0.12);
    border-color: rgba(0, 255, 242, 0.3);
    color: #00fff2;
}

.tag.tag-framework {
    background: rgba(0, 255, 136, 0.12);
    border-color: rgba(0, 255, 136, 0.3);
    color: #00ff88;
}

.tag.tag-tech {
    background: rgba(180, 130, 255, 0.12);
    border-color: rgba(180, 130, 255, 0.3);
    color: #b482ff;
}

.tag.tag-lang:hover {
    background: rgba(0, 255, 242, 0.2);
    border-color: #00fff2;
}

.tag.tag-framework:hover {
    background: rgba(0, 255, 136, 0.2);
    border-color: #00ff88;
}

.tag.tag-tech:hover {
    background: rgba(180, 130, 255, 0.2);
    border-color: #b482ff;
}

/* =====================================================
   13. 安全禁用样式（仅保护关键区域）
   ===================================================== */
/* 只保护导航栏、页脚、英雄标题区域 */
.navbar, .footer, .hero-title {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 代码块允许选择复制 */
pre, code, .code-block, .article-body, .article-content {
    user-select: text !important;
    -webkit-user-select: text !important;
    -moz-user-select: text !important;
    -ms-user-select: text !important;
}

.no-context-menu {
    context-menu: none;
}

/* =====================================================
   14. 文章卡片
   ===================================================== */
.article-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.article-cover {
    height: 180px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.article-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 255, 242, 0.1) 0%, transparent 100%);
}

.article-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

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

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

.article-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* =====================================================
   12. 项目卡片 - 增强版
   ===================================================== */
.project-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

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

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

.project-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.project-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 242, 0.1);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    border: 1px solid var(--border-color);
}

.project-links {
    display: flex;
    gap: var(--spacing-xs);
}

.project-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.project-link:hover {
    background: rgba(0, 255, 242, 0.1);
    color: var(--accent-primary);
}

.project-version {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(0, 255, 242, 0.1);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--accent-primary);
    font-family: var(--font-code);
    margin-bottom: var(--spacing-xs);
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-features {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.project-features-title {
    font-size: 0.85rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.project-features-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.feature-item svg {
    width: 14px;
    height: 14px;
    color: var(--accent-secondary);
    flex-shrink: 0;
    margin-top: 4px;
}

.project-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.project-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-stat svg {
    width: 16px;
    height: 16px;
    color: var(--accent-primary);
}

/* =====================================================
   13. 关于页面
   ===================================================== */
.about-hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-2xl);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.about-avatar {
    position: relative;
    width: 100%;
    max-width: 350px;
    aspect-ratio: 1;
    margin: 0 auto;
}

.avatar-frame {
    position: absolute;
    inset: 0;
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.avatar-frame::before,
.avatar-frame::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-gradient);
    border-radius: 50%;
}

.avatar-frame::before {
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
}

.avatar-frame::after {
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.avatar-inner {
    position: absolute;
    inset: 20px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
}

.about-intro h1 {
    margin-bottom: var(--spacing-sm);
}

.about-intro .subtitle {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
}

.about-intro p {
    font-size: 1.05rem;
    line-height: 1.8;
}

.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.contact-item:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* 技能详情 */
.skills-section {
    margin-top: var(--spacing-xl);
}

.skill-category {
    margin-bottom: var(--spacing-lg);
}

.skill-category-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.skill-category-title svg {
    color: var(--accent-primary);
}

.skill-bars {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.skill-bar-name {
    width: 100px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.skill-bar-track {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 1s ease;
}

.skill-bar-percent {
    width: 50px;
    text-align: right;
    font-size: 0.85rem;
    color: var(--accent-primary);
}

/* =====================================================
   14. 博客页面
   ===================================================== */
.blog-header {
    padding-top: 120px;
    padding-bottom: var(--spacing-xl);
    text-align: center;
}

.blog-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(0, 255, 242, 0.1);
}

.search-box {
    max-width: 500px;
    margin: 0 auto var(--spacing-xl);
    position: relative;
}

.search-input {
    width: 100%;
    padding: 14px 20px 14px 50px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--glow-primary);
}

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

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* =====================================================
   15. 文章详情页
   ===================================================== */
.article-page {
    padding-top: 100px;
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.article-page-title {
    margin-bottom: var(--spacing-md);
}

.article-page-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-page-cover {
    height: 400px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    font-size: 5rem;
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
}

.article-body {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.article-body h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.article-body p {
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-body li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    position: relative;
}

.article-body ul li::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--accent-gradient);
    border-radius: 50%;
}

.article-body blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 3px solid var(--accent-primary);
    background: rgba(0, 255, 242, 0.05);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--accent-primary);
}

/* 私有项目标签 */
.tag.tag-private {
    background: rgba(255, 136, 0, 0.12);
    border-color: rgba(255, 136, 0, 0.3);
    color: #ff8800;
}

.tag.tag-private:hover {
    background: rgba(255, 136, 0, 0.2);
    border-color: #ff8800;
}

/* 项目徽章容器 */
.project-badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

/* =====================================================
   16. 页脚
   ===================================================== */
.footer {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-brand .name {
    font-size: 1.2rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =====================================================
   17. 动画效果
   ===================================================== */
/* 滚动渐显动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 延迟类 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* =====================================================
   18. 响应式设计
   ===================================================== */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-avatar {
        max-width: 280px;
    }
    
    .avatar-frame {
        display: none;
    }
    
    .contact-list {
        justify-content: center;
    }
    
    .skill-bars {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .article-page-cover {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-stats {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .article-body {
        padding: var(--spacing-md);
    }
}

/* =====================================================
   19. 辅助类
   ===================================================== */
.text-center { text-align: center; }
.text-gradient { 
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* =====================================================
   20. 禁止拖拽图片和链接
   ===================================================== */
img, a {
    -webkit-user-drag: none;
    user-drag: none;
    pointer-events: auto;
}