/* Code看世界 - 深色数据风格 */
:root {
    --primary: #00D9FF;
    --primary-dark: #00A8CC;
    --secondary: #FF6B6B;
    --accent: #7C3AED;
    --bg-dark: #0a0e17;
    --bg-card: #111827;
    --bg-card-hover: #1f2937;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --border: #1f2937;
    --code-bg: #0d1117;
    --gradient-1: linear-gradient(135deg, #00D9FF 0%, #7C3AED 100%);
    --gradient-2: linear-gradient(135deg, #7C3AED 0%, #FF6B6B 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Effects */
.bg-grid {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
}

.bg-glow {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.logo-icon {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

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

.nav-right { display: flex; align-items: center; gap: 15px; }

.lang-switch {
    display: flex;
    gap: 5px;
    background: var(--bg-card);
    padding: 4px;
    border-radius: 8px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s;
}

.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active { background: var(--primary); color: var(--bg-dark); }

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 20px 60px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 60px;
}

.hero-content { flex: 1; max-width: 600px; }

.terminal-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.terminal-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    margin-bottom: 25px;
}

.title-main {
    display: block;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.title-sub {
    display: block;
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 25px;
}

.hero-quote {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: var(--bg-card);
    border-left: 3px solid var(--primary);
    border-radius: 0 10px 10px 0;
    margin-bottom: 35px;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary);
}

.quote-icon {
    font-size: 1.5rem;
    color: var(--primary);
    opacity: 0.5;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--bg-dark);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

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

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

.btn-large { padding: 18px 36px; font-size: 1rem; }

.yt-icon { width: 20px; height: 20px; }

.arrow { transition: transform 0.3s; }
.btn:hover .arrow { transform: translateX(5px); }

/* Hero Visual - Code Window */
.hero-visual { flex: 1; max-width: 500px; }

.code-window {
    background: var(--code-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.window-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 15px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

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

.dot.red { background: #FF5F56; }
.dot.yellow { background: #FFBD2E; }
.dot.green { background: #27C93F; }

.window-title {
    margin-left: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.code-content {
    padding: 20px;
    overflow-x: auto;
}

.code-content pre {
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
}

.code-content code {
    color: var(--text-secondary);
}

.code-content .kw { color: #FF79C6; }
.code-content .st { color: #F1FA8C; }
.code-content .cm { color: #6272A4; }

/* Sections */
section {
    padding: 100px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--bg-card);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
}

/* About Grid */
.about-grid, .content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.about-card, .content-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 30px;
    transition: all 0.3s;
}

.about-card:hover, .content-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.about-icon, .content-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-icon img, .content-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.about-card h3, .content-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.about-card p, .content-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.tech-logo {
    width: 120px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.tech-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-family: 'JetBrains Mono', monospace;
}

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

/* CTA Section */
.cta {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 15px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* Footer */
footer {
    padding: 60px 20px;
    background: var(--bg-dark);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

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

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-content { max-width: 100%; }
    .hero-visual { max-width: 100%; width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero-quote { text-align: left; }
    
    .nav-links { display: none; }
    
    .tech-grid { grid-template-columns: 1fr; max-width: 300px; }
    
    .footer-content { flex-direction: column; gap: 20px; }
}