/* ===== CSS Variables ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-orange: #f97316;
    --accent-green: #10b981;
    --accent-pink: #ec4899;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

.btn-light:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
}

.logo-icon {
    color: var(--primary);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 10px 18px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
}

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

.lang-toggle {
    padding: 8px 16px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.lang-toggle:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.1));
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(236, 72, 153, 0.08));
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(59, 130, 246, 0.1));
    top: 40%;
    left: 20%;
    animation-delay: -10s;
}

.shape-4 {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(236, 72, 153, 0.08));
    bottom: 30%;
    right: 15%;
    animation-delay: -15s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -20px) rotate(5deg); }
    50% { transform: translate(-10px, 20px) rotate(-5deg); }
    75% { transform: translate(-20px, -10px) rotate(3deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 650px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    z-index: 0;
}

.tech-grid {
    position: relative;
    width: 100%;
    height: 100%;
}

.grid-item {
    position: absolute;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.8);
    box-shadow: var(--shadow-lg);
}

.gi-1 {
    width: 200px;
    height: 200px;
    top: 0;
    left: 50px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    animation: pulse 4s infinite ease-in-out;
}

.gi-2 {
    width: 150px;
    height: 150px;
    top: 100px;
    right: 0;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
    animation: pulse 4s infinite ease-in-out 1s;
}

.gi-3 {
    width: 180px;
    height: 180px;
    bottom: 50px;
    left: 0;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    animation: pulse 4s infinite ease-in-out 2s;
}

.gi-4 {
    width: 120px;
    height: 120px;
    bottom: 100px;
    right: 80px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    animation: pulse 4s infinite ease-in-out 3s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
}

/* ===== Features Section ===== */
.features {
    padding: 100px 24px;
    background: var(--bg-light);
}

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

.feature-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--secondary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Stats Section ===== */
.stats {
    padding: 80px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    color: white;
}

.stat-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ===== Services Preview ===== */
.services-preview {
    padding: 100px 24px;
}

.services-showcase {
    max-width: 800px;
    margin: 0 auto;
}

.service-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.service-item:last-child {
    border-bottom: none;
}

.service-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--bg-light);
    -webkit-text-stroke: 2px var(--primary);
    line-height: 1;
}

.service-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--secondary);
}

.service-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.services-cta {
    text-align: center;
    margin-top: 50px;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 100px 24px;
    background: var(--secondary);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-light);
    padding: 80px 24px 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin: 16px 0;
    line-height: 1.6;
}

.company-name {
    font-size: 0.875rem;
    color: var(--text-light);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.footer-contact p {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.footer-contact svg {
    flex-shrink: 0;
    margin-top: 4px;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 2.75rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 24px 60px;
        min-height: auto;
    }
    
    .hero-content h1 {
        font-size: 2.25rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .service-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}