/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1e40af;
    --secondary-orange: #f97316;
    --secondary-orange-dark: #ea580c;
    --accent-green: #10b981;
    --accent-purple: #8b5cf6;
    --accent-red: #ef4444;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    --accent-yellow: #fbbf24;
    
    /* Neutral colors */
    --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;
    
    /* Semantic colors */
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-light: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    
    /* Spacing */
    --container-width: 1280px;
    --section-padding: 80px 20px;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: white;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo i {
    font-size: 28px;
    color: var(--secondary-orange);
}

.nav {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.nav a {
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--secondary-orange);
}

.phone-btn {
    background: var(--secondary-orange);
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s;
}

.phone-btn:hover {
    background: var(--secondary-orange-dark);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 400;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
}

.hero-feature i {
    font-size: 20px;
    color: var(--accent-yellow);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--secondary-orange-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(249, 115, 22, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--gray-800);
}

.btn-secondary:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.btn-catalog {
    background: var(--primary-blue);
    color: white;
    width: 100%;
}

.btn-catalog:hover {
    background: var(--primary-blue-dark);
}

.btn-cta-primary {
    background: white;
    color: var(--primary-blue);
    font-size: 18px;
    padding: 16px 40px;
}

.btn-cta-primary:hover {
    background: var(--gray-100);
    transform: scale(1.05);
}

.btn-cta-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    font-size: 18px;
    padding: 16px 40px;
}

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

/* ===== SECTION TITLES ===== */
.section-title {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 20px;
    color: var(--gray-900);
    line-height: 1.2;
}

.section-description {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 50px;
    line-height: 1.7;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
    margin-top: 40px;
}

.about-text {
    font-size: 17px;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--gray-900);
    font-weight: 700;
}

.about-text ul {
    margin: 20px 0;
}

.about-text ul li {
    display: flex;
    align-items: start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.about-text ul li i {
    color: var(--primary-blue);
    font-size: 14px;
    margin-top: 6px;
}

.about-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.benefit-card {
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    color: white;
    transition: transform 0.3s;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-card.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.benefit-card.green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.benefit-card.orange {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.benefit-card.purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.benefit-card i {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.benefit-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.benefit-card p {
    font-size: 15px;
    line-height: 1.6;
    opacity: 0.95;
}

/* ===== TYPES SECTION ===== */
.types {
    padding: var(--section-padding);
    background: var(--bg-light);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.type-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.type-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.type-icon {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 36px;
    color: white;
}

.type-icon.metal {
    background: linear-gradient(135deg, #6b7280 0%, #374151 100%);
}

.type-icon.concrete {
    background: linear-gradient(135deg, #78716c 0%, #57534e 100%);
}

.type-icon.plastic {
    background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
}

.type-icon.flexible {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.type-icon.signal {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.type-icon.automatic {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.type-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--gray-900);
}

.type-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.type-card ul {
    margin-bottom: 20px;
}

.type-card ul li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    font-size: 15px;
}

.type-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
    font-size: 18px;
}

.type-tag {
    display: inline-block;
    padding: 6px 14px;
    background: var(--primary-blue);
    color: white;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

/* ===== MATERIALS SECTION ===== */
.materials {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.materials-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.material-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.material-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.material-header {
    padding: 30px;
    color: white;
    display: flex;
    align-items: center;
    gap: 20px;
}

.material-header.steel {
    background: linear-gradient(135deg, #475569 0%, #334155 100%);
}

.material-header.concrete {
    background: linear-gradient(135deg, #78716c 0%, #57534e 100%);
}

.material-header.polymer {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.material-header i {
    font-size: 42px;
}

.material-header h3 {
    font-size: 26px;
    font-weight: 700;
}

.material-content {
    padding: 30px;
}

.material-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.7;
}

.material-content strong {
    color: var(--gray-900);
    font-weight: 700;
}

.material-content ul {
    margin: 15px 0;
}

.material-content ul li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.material-content ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
}

/* ===== GOST SECTION ===== */
.gost {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.gost-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.gost-card {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    border: 3px solid #fbbf24;
}

.gost-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(251, 191, 36, 0.2);
}

.gost-number {
    background: var(--accent-red);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 20px;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 20px;
}

.gost-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--gray-900);
}

.gost-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin: 20px 0 10px;
    color: var(--gray-800);
}

.gost-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.gost-card ul li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    line-height: 1.6;
}

.gost-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-red);
    font-weight: bold;
}

.gost-card strong {
    color: var(--gray-900);
    font-weight: 700;
}

.gost-table {
    margin-top: 60px;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.gost-table h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--gray-900);
}

.gost-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

.gost-table thead {
    background: var(--primary-blue);
    color: white;
}

.gost-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.gost-table td {
    padding: 15px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--text-secondary);
}

.gost-table tbody tr:hover {
    background: var(--bg-light);
}

/* ===== CATALOG SECTION ===== */
.catalog {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.catalog-item {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    position: relative;
    border: 2px solid transparent;
}

.catalog-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.catalog-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--accent-red);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

.catalog-badge.new {
    background: var(--accent-green);
}

.catalog-image {
    width: 100%;
    height: 200px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 64px;
}

.catalog-image.metal-img {
    background: linear-gradient(135deg, #6b7280 0%, #374151 100%);
}

.catalog-image.flexible-img {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.catalog-image.concrete-img {
    background: linear-gradient(135deg, #78716c 0%, #57534e 100%);
}

.catalog-image.signal-img {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.catalog-image.stainless-img {
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
}

.catalog-image.decorative-img {
    background: linear-gradient(135deg, #4c1d95 0%, #5b21b6 100%);
}

.catalog-image.auto-img {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.catalog-image.parking-img {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.catalog-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.catalog-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    min-height: 75px;
}

.catalog-specs {
    margin-bottom: 20px;
}

.catalog-specs li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.catalog-specs i {
    color: var(--accent-green);
    font-size: 12px;
}

.catalog-price {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

/* ===== APPLICATIONS SECTION ===== */
.applications {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.application-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    border-left: 5px solid;
}

.application-card.app1 {
    border-left-color: #3b82f6;
}

.application-card.app2 {
    border-left-color: #10b981;
}

.application-card.app3 {
    border-left-color: #f59e0b;
}

.application-card.app4 {
    border-left-color: #8b5cf6;
}

.application-card.app5 {
    border-left-color: #ef4444;
}

.application-card.app6 {
    border-left-color: #06b6d4;
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.application-card i {
    font-size: 56px;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.application-card.app1 i { color: #3b82f6; }
.application-card.app2 i { color: #10b981; }
.application-card.app3 i { color: #f59e0b; }
.application-card.app4 i { color: #8b5cf6; }
.application-card.app5 i { color: #ef4444; }
.application-card.app6 i { color: #06b6d4; }

.application-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--gray-900);
}

.application-card p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== INSTALLATION SECTION ===== */
.installation {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.installation-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.method-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 40px;
    border-radius: 16px;
    border: 2px solid var(--primary-blue);
    position: relative;
}

.method-number {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
}

.method-card h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--gray-900);
}

.method-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin: 25px 0 15px;
    color: var(--gray-800);
}

.method-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.method-card strong {
    color: var(--gray-900);
    font-weight: 700;
}

.method-card ol {
    margin: 20px 0;
    padding-left: 20px;
}

.method-card ol li {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.installation-tips {
    margin-top: 60px;
}

.installation-tips h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
    color: var(--gray-900);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.tip-item {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.tip-item i {
    font-size: 42px;
    color: var(--accent-red);
    margin-bottom: 15px;
}

.tip-item h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.tip-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.installation-cost {
    margin-top: 60px;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.installation-cost h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--gray-900);
}

.installation-cost table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

.installation-cost thead {
    background: var(--secondary-orange);
    color: white;
}

.installation-cost th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.installation-cost td {
    padding: 15px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--text-secondary);
}

.installation-cost tbody tr:hover {
    background: var(--bg-light);
}

.table-note {
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
}

/* ===== ADVANTAGES SECTION ===== */
.advantages {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.advantage-item {
    background: white;
    padding: 35px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.advantage-icon.adv1 { background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%); }
.advantage-icon.adv2 { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.advantage-icon.adv3 { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.advantage-icon.adv4 { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }
.advantage-icon.adv5 { background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%); }
.advantage-icon.adv6 { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.advantage-icon.adv7 { background: linear-gradient(135deg, #ec4899 0%, #db2777 100%); }
.advantage-icon.adv8 { background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%); }

.advantage-item h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.advantage-item p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== PRICES SECTION ===== */
.prices {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.price-table-wrapper {
    margin-top: 40px;
    overflow-x: auto;
}

.price-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    background: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    overflow: hidden;
}

.price-table thead {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
}

.price-table th {
    padding: 18px 15px;
    text-align: left;
    font-weight: 600;
    font-size: 16px;
}

.price-table td {
    padding: 18px 15px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--text-secondary);
}

.price-table tbody tr:hover {
    background: var(--bg-light);
}

.price-table strong {
    color: var(--gray-900);
    font-weight: 700;
}

.price-notes {
    margin-top: 60px;
}

.price-notes h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
    color: var(--gray-900);
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.note-item {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.note-item i {
    font-size: 42px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.note-item h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.note-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== FAQ SECTION ===== */
.faq {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
}

.faq-grid {
    display: grid;
    gap: 25px;
    margin-top: 40px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.faq-question {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
}

.faq-question i {
    font-size: 28px;
    flex-shrink: 0;
}

.faq-question h3 {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
}

.faq-answer {
    padding: 30px;
    background: white;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
}

.faq-answer strong {
    color: var(--gray-900);
    font-weight: 700;
}

.faq-answer ul {
    margin: 15px 0;
    padding-left: 20px;
}

.faq-answer ul li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.7;
    list-style: disc;
}

.comparison-mini {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
}

.comparison-mini td {
    padding: 10px;
    border: 1px solid var(--gray-300);
}

.comparison-mini tr:first-child {
    background: var(--gray-100);
    font-weight: 700;
}

/* ===== REVIEWS SECTION ===== */
.reviews {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.review-card {
    background: linear-gradient(135deg, #fef9c3 0%, #fef08a 100%);
    padding: 30px;
    border-radius: 16px;
    border: 2px solid var(--accent-yellow);
    transition: all 0.3s;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(251, 191, 36, 0.2);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.review-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
}

.review-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 5px;
}

.review-rating {
    color: var(--accent-yellow);
    font-size: 16px;
}

.review-rating i {
    color: #f59e0b;
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
    font-size: 15px;
}

.review-date {
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
}

/* ===== CTA SECTION ===== */
.cta {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 600;
}

.cta-feature i {
    font-size: 28px;
    color: var(--accent-yellow);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    color: var(--gray-300);
    padding: 60px 20px 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: white;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col p {
    line-height: 1.7;
    margin-bottom: 15px;
    font-size: 15px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--gray-400);
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--secondary-orange);
}

.footer-contacts li {
    display: flex;
    align-items: start;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-contacts i {
    color: var(--secondary-orange);
    margin-top: 3px;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s;
}

.footer-social a:hover {
    background: var(--secondary-orange);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 38px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .installation-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        justify-content: center;
    }
    
    .nav {
        width: 100%;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .about-benefits {
        grid-template-columns: 1fr;
    }
    
    .types-grid,
    .materials-comparison,
    .catalog-grid,
    .applications-grid,
    .advantages-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 15px;
    }
    
    .cta-content h2 {
        font-size: 32px;
    }
    
    .cta-content p {
        font-size: 18px;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .gost-card,
    .method-card {
        padding: 25px;
    }
    
    .price-table {
        font-size: 13px;
    }
    
    .price-table th,
    .price-table td {
        padding: 10px 8px;
    }
}