/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --secondary-color: #06b6d4;
    --accent-color: #a855f7;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
    --gradient-accent: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ========================================
   Container
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
}

.btn i {
    font-size: 1.1em;
}

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

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

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu a {
    font-weight: 500;
    color: var(--gray-700);
}

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

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.burger span {
    width: 25px;
    height: 3px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    padding: 8rem 0 3rem;
    overflow: hidden;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

/* Главный заголовок на всю ширину */
.hero-title-main {
    font-size: 3.5rem;
    line-height: 1.15;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 800;
    color: var(--gray-900);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 0.75fr;
    gap: 3rem;
    align-items: flex-start;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.benefit {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 1rem;
    color: var(--gray-700);
}

.benefit i {
    color: var(--success-color);
    font-size: 1.25rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-align: center;
}

.hero-image {
    position: relative;
    max-width: 420px;
    width: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-left: auto;
}

.hero-img {
    width: 100%;
    height: auto;
    max-height: 600px;
    display: block;
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px -12px rgba(99, 102, 241, 0.25);
    animation: float 3s ease-in-out infinite;
    object-fit: cover;
    object-position: center;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

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

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

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--gradient-secondary);
    bottom: -50px;
    left: -50px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--gradient-accent);
    top: 50%;
    left: 10%;
}

/* ========================================
   Section Header
   ======================================== */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
}

/* ========================================
   Problems Section
   ======================================== */
.problems {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.problem-card {
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-100);
    transition: var(--transition);
}

.problem-card:hover {
    border-color: var(--danger-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #fecaca 0%, #ef4444 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.problem-icon i {
    font-size: 2rem;
    color: var(--white);
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.problem-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ========================================
   Solution Section
   ======================================== */
.solution {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.solution-card {
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-100);
    transition: var(--transition);
}

.solution-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.solution-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.solution-icon i {
    font-size: 2rem;
    color: var(--white);
}

.solution-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.solution-card p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ========================================
   How It Works Section
   ======================================== */
.how-it-works {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-final .step-number {
    background: var(--gradient-accent);
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.step-message {
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    font-style: italic;
    color: var(--gray-700);
    margin-top: var(--spacing-sm);
}

.step-arrow {
    text-align: center;
    color: var(--primary-color);
    font-size: 2rem;
    margin: var(--spacing-md) 0;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-xl);
    text-align: center;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-100);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ========================================
   Economics Section
   ======================================== */
.economics {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.economics-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.comparison-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-200);
    position: relative;
}

.comparison-human {
    background: var(--gray-50);
}

.comparison-bot {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-color: var(--primary-color);
}

.comparison-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--gradient-accent);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.875rem;
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.comparison-header i {
    font-size: 2.5rem;
}

.comparison-human .comparison-header i {
    color: var(--gray-500);
}

.comparison-bot .comparison-header i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.comparison-list {
    margin-bottom: var(--spacing-lg);
}

.comparison-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9375rem;
}

.comparison-human .comparison-list i {
    color: var(--danger-color);
    margin-top: 3px;
}

.comparison-bot .comparison-list i {
    color: var(--success-color);
    margin-top: 3px;
}

.comparison-price {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--gray-200);
}

.price-amount {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
}

.price-period {
    display: block;
    font-size: 1rem;
    color: var(--gray-600);
    margin-top: 0.25rem;
}

.economics-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.benefit-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-secondary);
    border-radius: var(--radius-md);
}

.benefit-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.benefit-text h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.benefit-text p {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.pricing-card {
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.pricing-featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.875rem;
}

.pricing-title {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.pricing-price {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--gray-200);
}

.pricing-features {
    margin-bottom: var(--spacing-lg);
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9375rem;
}

.pricing-features i {
    color: var(--success-color);
    margin-top: 3px;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

.pricing-trial {
    padding: var(--spacing-xl);
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    color: var(--white);
    text-align: center;
}

.trial-content i {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.trial-content h3 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.trial-content p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

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

/* ========================================
   Cases Section
   ======================================== */
.cases {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-100);
    transition: var(--transition);
}

.case-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.case-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-200);
}

.case-header h3 {
    margin-bottom: 0.5rem;
}

.case-location {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.case-problem,
.case-solution,
.case-results {
    margin-bottom: var(--spacing-md);
}

.case-card h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.case-card p {
    font-size: 0.9375rem;
    color: var(--gray-700);
    line-height: 1.6;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.125rem;
    margin: 0;
}

.faq-question i {
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--gray-700);
    line-height: 1.7;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    font-size: 1.125rem;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.contact-guarantees {
    margin-bottom: var(--spacing-xl);
}

.guarantee {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.guarantee i {
    color: var(--success-color);
    font-size: 1.25rem;
}

.contact-social {
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    text-align: center;
}

.contact-form-wrapper {
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-2xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-note {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-align: center;
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    background: var(--gray-900);
    color: var(--gray-300);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.footer-col i {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-800);
    color: var(--gray-500);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-title-main {
        font-size: 2.75rem;
        margin-bottom: var(--spacing-xl);
    }
    
    .hero-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-image {
        order: -1;
        max-width: 100%;
    }
    
    .hero {
        padding: 7rem 0 2rem;
    }
    
    .economics-comparison {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .hero-title-main {
        font-size: 2rem;
        margin-bottom: var(--spacing-lg);
        line-height: 1.2;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-3xl) var(--spacing-lg);
        box-shadow: var(--shadow-2xl);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .burger {
        display: flex;
    }
    
    .hero {
        padding: 6rem 0 2rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-image {
        max-width: 100%;
        margin: 0 auto;
    }
    
    .hero-img {
        max-height: 500px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .problems-grid,
    .solution-grid,
    .features-grid,
    .pricing-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .step {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title-main {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-img {
        max-height: 400px;
    }
    
    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}