/* ===== CSS Variables ===== */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --secondary: #10B981;
    --accent: #F59E0B;
    --dark: #1F2937;
    --dark-light: #374151;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --light: #F3F4F6;
    --white: #FFFFFF;
    --gradient-1: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    --gradient-2: linear-gradient(135deg, #10B981 0%, #3B82F6 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
}

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

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

ul {
    list-style: none;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--gray);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -1px;
}

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

.nav-links a {
    font-weight: 500;
    color: var(--dark-light);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    padding: 8px 16px;
    background: var(--light);
    border: none;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -200px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    left: -100px;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    transform: rotate(45deg);
}

.grid-item {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: var(--radius);
    opacity: 0.8;
    animation: pulse 2s ease-in-out infinite;
}

.grid-item:nth-child(2) { animation-delay: 0.2s; }
.grid-item:nth-child(3) { animation-delay: 0.4s; }
.grid-item:nth-child(4) { animation-delay: 0.6s; }
.grid-item:nth-child(5) { animation-delay: 0.8s; background: var(--gradient-2); }
.grid-item:nth-child(6) { animation-delay: 1s; }
.grid-item:nth-child(7) { animation-delay: 1.2s; }
.grid-item:nth-child(8) { animation-delay: 1.4s; }
.grid-item:nth-child(9) { animation-delay: 1.6s; }

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

/* ===== Section Styles ===== */
section {
    padding: 100px 0;
}

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

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
    background: var(--light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--gradient-1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.feature-card p {
    font-size: 0.95rem;
}

/* ===== Stats Section ===== */
.stats {
    background: var(--gradient-1);
    padding: 80px 0;
}

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

.stat-item {
    color: var(--white);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

/* ===== Services Preview ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-1);
    transform: scaleY(0);
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
    transform: scaleY(1);
}

.service-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 16px;
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    margin-bottom: 20px;
}

.service-link {
    color: var(--primary);
    font-weight: 500;
}

.service-link:hover {
    color: var(--primary-dark);
}

/* ===== Industries Section ===== */
.industries {
    background: var(--light);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.industry-item {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.industry-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow);
}

.industry-icon {
    font-size: 1.5rem;
}

/* ===== CTA Section ===== */
.cta {
    background: var(--dark);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--gray-light);
    font-size: 1.125rem;
    margin-bottom: 32px;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    padding: 80px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    display: inline-block;
    margin-bottom: 16px;
    color: var(--white);
}

.footer-brand p {
    color: var(--gray-light);
    margin-bottom: 8px;
}

.footer-brand .company-name {
    color: var(--gray);
    font-size: 0.9rem;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer-links a {
    color: var(--gray-light);
}

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

.footer-contact p {
    color: var(--gray-light);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid var(--dark-light);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===== Page Header ===== */
.page-header {
    background: var(--gradient-1);
    padding: 140px 0 80px;
    text-align: center;
}

.page-header h1 {
    color: var(--white);
    margin-bottom: 16px;
}

.page-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== About Page ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image-placeholder {
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--white);
}

.about-text h2 {
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 16px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.value-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.value-card h3 {
    margin-bottom: 12px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

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

.team-avatar {
    width: 120px;
    height: 120px;
    background: var(--gradient-1);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
}

.team-card h3 {
    margin-bottom: 4px;
    font-size: 1.125rem;
}

.team-card .role {
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.team-card p {
    font-size: 0.9rem;
}

/* ===== Services Page ===== */
.services-detail {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.service-detail-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--light);
    transition: var(--transition);
}

.service-detail-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.service-detail-card .icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-detail-card .icon svg {
    width: 36px;
    height: 36px;
    color: var(--white);
}

.service-detail-card h3 {
    margin-bottom: 16px;
}

.service-detail-card p {
    margin-bottom: 20px;
}

.service-detail-card ul {
    margin-left: 20px;
}

.service-detail-card li {
    color: var(--gray);
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.service-detail-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* ===== Solutions Page ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.solution-image {
    height: 200px;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.solution-content {
    padding: 30px;
}

.solution-content h3 {
    margin-bottom: 12px;
}

.solution-content p {
    margin-bottom: 20px;
}

.case-studies {
    background: var(--light);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
}

.case-image {
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    min-height: 250px;
}

.case-content {
    padding: 30px;
}

.case-content .tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 16px;
}

.case-content h3 {
    margin-bottom: 12px;
}

.case-content p {
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.case-stats {
    display: flex;
    gap: 24px;
}

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

.case-stat .number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.case-stat .label {
    font-size: 0.8rem;
    color: var(--gray);
}

/* ===== Contact Page ===== */
.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    margin-bottom: 20px;
}

.contact-info > p {
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-item .icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item h4 {
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.95rem;
}

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

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--light);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form .btn {
    width: 100%;
}

.map-section {
    background: var(--light);
}

.map-placeholder {
    height: 400px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
}

/* ===== Legal Pages ===== */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    margin-top: 40px;
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.legal-content h3 {
    margin-top: 30px;
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.legal-content p {
    margin-bottom: 16px;
    line-height: 1.8;
}

.legal-content ul {
    margin-left: 24px;
    margin-bottom: 16px;
}

.legal-content li {
    color: var(--gray);
    margin-bottom: 8px;
    line-height: 1.8;
}

.legal-content .update-date {
    color: var(--gray);
    font-style: italic;
    margin-bottom: 40px;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .features-grid,
    .stats-grid,
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .solutions-grid,
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .features-grid,
    .stats-grid,
    .services-grid,
    .industries-grid,
    .solutions-grid,
    .values-grid,
    .team-grid,
    .services-detail {
        grid-template-columns: 1fr;
    }
    
    .about-intro,
    .contact-section {
        grid-template-columns: 1fr;
    }
    
    .case-card {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}