:root {
    --primary: #1a1f36;
    --primary-light: #2b3449;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --text: #374151;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg: #ffffff;
    --bg-light: #f9fafb;
    --border: #e5e7eb;
    --shadow: 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);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--primary);
}

.logo-icon {
    width: auto;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    height: 100%;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: 
        radial-gradient(circle at 70% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 90% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: 24px;
    font-family: 'Noto Serif SC', serif;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

/* Dashboard Preview */
.hero-visual {
    perspective: 1000px;
}

.dashboard-preview {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg), 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s;
}

.dashboard-preview:hover {
    transform: rotateY(0) rotateX(0);
}

.preview-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: #f1f5f9;
    border-bottom: 1px solid var(--border);
}

.preview-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #cbd5e1;
}

.preview-dot:first-child { background: #ef4444; }
.preview-dot:nth-child(2) { background: #f59e0b; }
.preview-dot:nth-child(3) { background: #22c55e; }

.preview-content {
    display: flex;
    height: 300px;
}

.preview-sidebar {
    width: 180px;
    background: var(--primary);
    padding: 16px;
}

.preview-main {
    flex: 1;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.preview-chart {
    height: 120px;
    background: linear-gradient(180deg, #eff6ff 0%, transparent 100%);
    border-radius: 8px;
    border: 1px solid #dbeafe;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    flex: 1;
}

.preview-card {
    background: var(--bg-light);
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Features Preview */
.features-preview {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    font-family: 'Noto Serif SC', serif;
}

.section-desc {
    font-size: 18px;
    color: var(--text-light);
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
}

/* CTA */
.cta {
    padding: 100px 0;
    background: var(--primary);
}

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

.cta h2 {
    font-size: 40px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
    font-family: 'Noto Serif SC', serif;
}

.cta p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.cta .btn-primary {
    background: white;
    color: var(--primary);
}

.cta .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* Footer */
.footer {
    background: #0f172a;
    color: white;
    padding: 60px 0 24px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        display: none;
    }
    
    .feature-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 32px;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}