/* ============================================
   CSS Variables & Theme - Light/Dark Mode
   ============================================ */
:root {
    /* Light Theme (Default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --accent-primary: #0891b2;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #059669;
    --accent-warning: #d97706;
    --accent-danger: #dc2626;
    
    --gradient-primary: linear-gradient(135deg, #0891b2 0%, #7c3aed 100%);
    --gradient-hero: linear-gradient(180deg, rgba(248, 250, 252, 0) 0%, rgba(248, 250, 252, 0.8) 100%);
    
    --border-color: #e2e8f0;
    --border-color-light: #f1f5f9;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --nav-height: 70px;
    --section-padding: 80px;
    --container-width: 1200px;
    
    /* Effects */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 20px rgba(8, 145, 178, 0.25);
    
    --border-radius: 12px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Grid animation */
    --grid-color: rgba(8, 145, 178, 0.06);
    --shape-opacity: 0.15;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --accent-primary: #22d3ee;
    --accent-secondary: #a78bfa;
    --accent-tertiary: #34d399;
    --accent-warning: #fbbf24;
    --accent-danger: #f87171;
    
    --gradient-primary: linear-gradient(135deg, #22d3ee 0%, #a78bfa 100%);
    --gradient-hero: linear-gradient(180deg, rgba(15, 23, 42, 0) 0%, rgba(15, 23, 42, 0.8) 100%);
    
    --border-color: #334155;
    --border-color-light: #1e293b;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(34, 211, 238, 0.3);
    
    --grid-color: rgba(34, 211, 238, 0.04);
    --shape-opacity: 0.3;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   Background Animation
   ============================================ */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: var(--shape-opacity);
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -150px;
    right: -150px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: 10%;
    left: -150px;
    animation-delay: -7s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-tertiary);
    bottom: -100px;
    right: 15%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(20px, -20px) scale(1.03); }
    50% { transform: translate(-15px, 15px) scale(0.97); }
    75% { transform: translate(15px, 20px) scale(1.01); }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: var(--bg-primary);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.85);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 2px;
}

.logo-bracket {
    color: var(--accent-primary);
}

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

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    display: none;
}

.theme-toggle .icon-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

.lang-toggle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 8px 16px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.lang-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.lang-toggle .lang-zh.active,
.lang-toggle .lang-en.active {
    color: var(--accent-primary);
    font-weight: 600;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
    padding-top: var(--nav-height);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    padding: 60px 24px;
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
    margin-bottom: 12px;
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.name-highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cursor-blink {
    color: var(--accent-primary);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-title-wrapper {
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-title {
    font-size: 1.3rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 10px;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 35px rgba(8, 145, 178, 0.4);
}

[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 0 35px rgba(34, 211, 238, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

/* Code Window */
.hero-visual {
    animation: fadeInRight 0.8s ease 0.3s forwards;
    opacity: 0;
}

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

.code-window {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .code-window {
    background: #1a1f2e;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .code-header {
    background: rgba(0, 0, 0, 0.3);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.code-title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.code-content {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content code {
    display: block;
}

.code-content .keyword { color: #c678dd; }
.code-content .class-name { color: #e5c07b; }
.code-content .function { color: #61afef; }
.code-content .param { color: #e06c75; }
.code-content .string { color: #98c379; }

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--section-padding) 24px;
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ============================================
   Skills Section
   ============================================ */
.skills-section {
    background: var(--bg-secondary);
    transition: background-color var(--transition-normal);
}

.skills-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 28px 20px;
    text-align: center;
    transition: all var(--transition-normal);
    animation: fadeInUp 0.6s ease calc(var(--delay)) forwards;
    opacity: 0;
}

.skill-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
}

.skill-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.skill-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ============================================
   Projects Section
   ============================================ */
.projects-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 28px;
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-secondary);
    box-shadow: var(--shadow-md);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.project-tag {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(8, 145, 178, 0.1);
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

[data-theme="dark"] .project-tag {
    background: rgba(34, 211, 238, 0.1);
}

.project-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
    line-height: 1.6;
}

.project-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    transition: all var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-secondary);
}

.project-status {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    background: var(--bg-secondary);
    transition: background-color var(--transition-normal);
}

.contact-links {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.contact-icon {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-card span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 32px 24px;
    border-top: 1px solid var(--border-color);
    transition: border-color var(--transition-normal);
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    text-align: center;
}

.footer-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.footer-tech {
    font-family: var(--font-mono);
    font-size: 0.75rem !important;
}

/* ============================================
   Blog Page Styles
   ============================================ */
.page-header {
    padding: 60px 24px 32px;
    text-align: center;
}

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

.blog-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* Blog Filters */
.blog-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.filter-icon {
    font-size: 1rem;
}

.blog-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.blog-card:hover {
    transform: translateX(6px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-group {
    font-size: 1rem;
}

.blog-category {
    padding: 2px 10px;
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-secondary);
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

[data-theme="dark"] .blog-category {
    background: rgba(167, 139, 250, 0.1);
}

.blog-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.blog-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.blog-empty {
    text-align: center;
    padding: 60px 24px;
}

.blog-empty-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.blog-empty h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.blog-empty p {
    color: var(--text-muted);
}

/* ============================================
   Blog Post Page Styles
   ============================================ */
.post-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.post-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.post-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-primary);
    font-size: 0.9rem;
    margin-bottom: 20px;
    transition: all var(--transition-fast);
}

.post-back:hover {
    gap: 10px;
}

.post-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.3;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.post-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.4;
}

/* H1 - 一级标题 */
.post-content h1 {
    font-size: 1.8rem;
    margin-top: 48px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-primary);
}

/* H2 - 二级标题 */
.post-content h2 {
    font-size: 1.5rem;
    margin-top: 40px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

/* H3 - 三级标题 */
.post-content h3 {
    font-size: 1.3rem;
    margin-top: 32px;
    margin-bottom: 14px;
    padding-left: 12px;
    border-left: 4px solid var(--accent-primary);
}

/* H4 - 四级标题（你文档中的主标题） */
.post-content h4 {
    font-size: 1.15rem;
    margin-top: 28px;
    margin-bottom: 12px;
    padding-left: 10px;
    border-left: 3px solid var(--accent-secondary);
    color: var(--accent-secondary);
}

/* H5 - 五级标题 */
.post-content h5 {
    font-size: 1rem;
    margin-top: 20px;
    margin-bottom: 10px;
    padding-left: 8px;
    border-left: 2px solid var(--accent-tertiary);
    color: var(--text-primary);
}

/* H6 - 六级标题 */
.post-content h6 {
    font-size: 0.9rem;
    margin-top: 16px;
    margin-bottom: 8px;
    padding-left: 6px;
    border-left: 2px solid var(--text-muted);
    color: var(--text-secondary);
    font-weight: 600;
}

/* 第一个标题不需要顶部间距 */
.post-content > h1:first-child,
.post-content > h2:first-child,
.post-content > h3:first-child,
.post-content > h4:first-child,
.post-content > h5:first-child,
.post-content > h6:first-child {
    margin-top: 0;
}

.post-content p {
    margin-bottom: 16px;
}

.post-content a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.post-content ul,
.post-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.post-content li {
    margin-bottom: 8px;
}

.post-content blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: 20px;
    margin: 24px 0;
    color: var(--text-muted);
    font-style: italic;
}

.post-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    margin: 20px 0;
}

[data-theme="dark"] .post-content pre {
    background: #1a1f2e;
}

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.post-content p code,
.post-content li code {
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.post-content th,
.post-content td {
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    text-align: left;
}

.post-content th {
    background: var(--bg-secondary);
    font-weight: 600;
}

.post-content hr {
    border: none;
    height: 1px;
    background: var(--border-color);
    margin: 32px 0;
}

.post-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Table wrapper for horizontal scroll */
.post-content .table-wrapper {
    overflow-x: auto;
    margin: 20px 0;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.post-content .table-wrapper table {
    margin: 0;
    border: none;
    min-width: 600px;
}

.post-content .table-wrapper th,
.post-content .table-wrapper td {
    border: none;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.post-content .table-wrapper tr:last-child td {
    border-bottom: none;
}

.post-content .table-wrapper th {
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
}

/* Math formulas */
.post-content .math-block {
    overflow-x: auto;
    padding: 16px;
    margin: 20px 0;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
}

.post-content .math-inline {
    padding: 0 4px;
}

/* Markdown images */
.post-content figure.md-image {
    margin: 24px 0;
    text-align: center;
}

.post-content figure.md-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.post-content figure.md-image figcaption {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

.post-content figure.md-image figcaption:empty {
    display: none;
}

/* Mermaid diagrams */
.post-content .mermaid {
    margin: 24px 0;
    text-align: center;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
}

.post-content .mermaid svg {
    max-width: 100%;
    height: auto;
}

.post-content .mermaid-error {
    color: var(--accent-danger);
    font-size: 0.85rem;
    padding: 12px;
    background: rgba(220, 38, 38, 0.1);
    border-radius: 4px;
}

/* Prism.js code block overrides */
.post-content pre[class*="language-"] {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin: 20px 0;
    overflow-x: auto;
}

[data-theme="dark"] .post-content pre[class*="language-"] {
    background: #1a1f2e !important;
}

.post-content code[class*="language-"] {
    font-family: var(--font-mono);
    font-size: 0.9em;
    text-shadow: none !important;
}

/* ============================================
   CV Page Styles - Compact Version
   ============================================ */
.cv-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

.cv-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.cv-tab {
    padding: 10px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.cv-tab:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.cv-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.cv-content {
    display: none;
}

.cv-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.cv-section {
    margin-bottom: 28px;
}

.cv-section-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent-primary);
    color: var(--accent-primary);
}

.cv-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 10px;
}

.cv-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 6px;
}

.cv-item-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.cv-item-subtitle {
    font-size: 0.85rem;
    color: var(--accent-secondary);
    margin-top: 2px;
}

.cv-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-align: right;
}

.cv-item-meta div {
    margin-bottom: 2px;
}

.cv-item-content {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.cv-item-content p {
    margin-bottom: 6px;
}

.cv-item-content ul {
    margin-top: 6px;
    padding-left: 18px;
}

.cv-item-content li {
    margin-bottom: 4px;
    position: relative;
    list-style: none;
}

.cv-item-content li::before {
    content: '▹';
    position: absolute;
    left: -16px;
    color: var(--accent-primary);
    font-size: 0.8em;
}

.cv-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.cv-skill-tag {
    padding: 6px 14px;
    background: rgba(8, 145, 178, 0.1);
    border: 1px solid rgba(8, 145, 178, 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--accent-primary);
}

[data-theme="dark"] .cv-skill-tag {
    background: rgba(34, 211, 238, 0.1);
    border-color: rgba(34, 211, 238, 0.2);
}

.cv-download {
    text-align: center;
    margin-top: 32px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
        --section-padding: 50px;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    [data-theme="dark"] .nav-links {
        background: rgba(15, 23, 42, 0.98);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links a {
        display: block;
        padding: 14px 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-name {
        font-size: 2.2rem;
    }
    
    .hero-title {
        font-size: 1rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-card {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .cv-item-header {
        flex-direction: column;
    }
    
    .cv-item-meta {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 30px 16px;
    }
    
    .hero-name {
        font-size: 1.8rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .code-content {
        font-size: 0.7rem;
        padding: 14px;
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    .cv-tabs {
        flex-direction: column;
    }
    
    .cv-tab {
        width: 100%;
        text-align: center;
    }
    
    .post-title {
        font-size: 1.5rem;
    }
}