* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Open Sans', -apple-system, sans-serif; font-size: 16px; line-height: 1.6; color: #333; background: #fff; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

.btn { display: inline-block; padding: 12px 32px; border-radius: 4px; font-weight: 600; font-size: 15px; transition: all 0.3s ease; cursor: pointer; border: none; }
.btn-primary { background: #1a56db; color: #fff; }
.btn-primary:hover { background: #1e429f; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(26,86,219,0.3); }
.btn-outline { background: transparent; color: #fff; border: 2px solid #fff; }
.btn-outline:hover { background: #fff; color: #1a56db; }
.btn-white { background: #fff; color: #1a56db; }
.btn-white:hover { background: #f3f4f6; transform: translateY(-2px); }
.btn-full { width: 100%; }
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }

.header { position: fixed; top: 0; left: 0; right: 0; background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.08); z-index: 1000; }
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo-text { font-size: 22px; font-weight: 700; color: #1a56db; letter-spacing: 0.5px; }
.nav-list { display: flex; gap: 35px; }
.nav-list a { font-size: 15px; font-weight: 500; color: #444; transition: color 0.3s; }
.nav-list a:hover, .nav-list a.active { color: #1a56db; }
.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.mobile-menu-btn span { width: 25px; height: 3px; background: #333; border-radius: 2px; }

.hero { position: relative; height: 600px; background: linear-gradient(135deg, #1a56db 0%, #0e2f5a 100%); display: flex; align-items: center; margin-top: 70px; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="80" cy="20" r="30" fill="rgba(255,255,255,0.05)"/><circle cx="20" cy="80" r="40" fill="rgba(255,255,255,0.03)"/></svg>'); background-size: cover; }
.hero-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.2); }
.hero-content { position: relative; z-index: 2; max-width: 700px; color: #fff; }
.hero-content h1 { font-size: 48px; font-weight: 700; margin-bottom: 20px; line-height: 1.2; }
.hero-content p { font-size: 18px; margin-bottom: 35px; opacity: 0.9; line-height: 1.7; }
.hero-buttons { display: flex; gap: 15px; }

.page-banner { position: relative; height: 300px; background: linear-gradient(135deg, #1a56db 0%, #0e2f5a 100%); display: flex; align-items: center; margin-top: 70px; }
.page-banner-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.2); }
.page-banner-content { position: relative; z-index: 2; color: #fff; text-align: center; width: 100%; }
.page-banner-content h1 { font-size: 40px; font-weight: 700; margin-bottom: 10px; }
.page-banner-content p { font-size: 17px; opacity: 0.9; }

.section { padding: 80px 0; }
.bg-gray { background: #f8fafc; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 34px; font-weight: 700; color: #1a202c; margin-bottom: 12px; }
.section-title p { font-size: 16px; color: #64748b; max-width: 600px; margin: 0 auto; }

.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.feature-item { text-align: center; padding: 30px 20px; border-radius: 8px; transition: all 0.3s; }
.feature-item:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
.feature-icon { font-size: 45px; margin-bottom: 20px; }
.feature-item h3 { font-size: 19px; font-weight: 600; margin-bottom: 12px; color: #1a202c; }
.feature-item p { font-size: 14px; color: #64748b; line-height: 1.6; }

.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-card { background: #fff; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.06); transition: all 0.3s; }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
.product-img { height: 200px; background-size: cover; background-position: center; }
.product-img-clear { background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%); }
.product-img-ultra { background: linear-gradient(135deg, #f0fdf4 0%, #bbf7d0 100%); }
.product-img-tinted { background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%); }
.product-img-reflective { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); }
.product-img-patterned { background: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%); }
.product-img-tempered { background: linear-gradient(135deg, #f3e8ff 0%, #e9d5ff 100%); }
.product-info { padding: 25px; }
.product-info h3 { font-size: 19px; font-weight: 600; margin-bottom: 12px; color: #1a202c; }
.product-info p { font-size: 14px; color: #64748b; margin-bottom: 15px; line-height: 1.6; }
.product-link { font-size: 14px; font-weight: 600; color: #1a56db; }
.product-link:hover { text-decoration: underline; }

.product-detail-item { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 70px; }
.product-detail-item.reverse .product-detail-img { order: 2; }
.product-detail-img { height: 350px; border-radius: 8px; background-size: cover; background-position: center; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.product-detail-content h2 { font-size: 28px; font-weight: 700; margin-bottom: 18px; color: #1a202c; }
.product-detail-content p { color: #64748b; margin-bottom: 20px; line-height: 1.7; }
.product-detail-content h4 { font-size: 16px; font-weight: 600; margin-bottom: 10px; color: #334155; }
.product-detail-content ul { margin-bottom: 25px; }
.product-detail-content li { padding: 5px 0; color: #64748b; position: relative; padding-left: 20px; }
.product-detail-content li::before { content: '✓'; position: absolute; left: 0; color: #10b981; font-weight: bold; }

.packaging-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.pack-item { background: #fff; padding: 35px 30px; border-radius: 8px; text-align: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.pack-item h3 { font-size: 19px; font-weight: 600; margin-bottom: 12px; color: #1a202c; }
.pack-item p { font-size: 14px; color: #64748b; line-height: 1.6; }

.about-text { max-width: 800px; margin: 0 auto 60px; text-align: center; }
.about-text h2 { font-size: 30px; font-weight: 700; margin-bottom: 25px; color: #1a202c; }
.about-text p { font-size: 16px; color: #64748b; line-height: 1.8; margin-bottom: 15px; }
.about-advantages h2 { font-size: 30px; font-weight: 700; text-align: center; margin-bottom: 40px; color: #1a202c; }
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.adv-item { background: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); border-left: 4px solid #1a56db; }
.adv-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: #1a202c; }
.adv-item p { font-size: 14px; color: #64748b; line-height: 1.6; }

.partners-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.partner-item { background: #fff; padding: 35px 25px; border-radius: 8px; text-align: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05); transition: all 0.3s; }
.partner-item:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }
.partner-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: #1a202c; }
.partner-item p { font-size: 13px; color: #64748b; }

.cta-section { background: linear-gradient(135deg, #1a56db 0%, #0e2f5a 100%); padding: 70px 0; color: #fff; }
.cta-content { text-align: center; max-width: 600px; margin: 0 auto; }
.cta-content h2 { font-size: 32px; font-weight: 700; margin-bottom: 15px; }
.cta-content p { font-size: 17px; opacity: 0.9; margin-bottom: 30px; }

.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; }
.contact-info h2, .contact-form h2 { font-size: 26px; font-weight: 700; margin-bottom: 15px; color: #1a202c; }
.contact-desc { color: #64748b; margin-bottom: 30px; line-height: 1.7; }
.contact-item { display: flex; gap: 15px; margin-bottom: 22px; align-items: flex-start; }
.contact-icon { font-size: 24px; flex-shrink: 0; width: 40px; height: 40px; background: #eff6ff; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.contact-item h4 { font-size: 15px; font-weight: 600; margin-bottom: 3px; color: #334155; }
.contact-item p { font-size: 14px; color: #64748b; }

.contact-form { background: #fff; padding: 35px; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: #334155; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px 14px; border: 1px solid #d1d5db; border-radius: 5px; font-size: 14px; font-family: inherit; transition: border-color 0.3s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: #1a56db; box-shadow: 0 0 0 3px rgba(26,86,219,0.1); }
.form-group textarea { resize: vertical; min-height: 100px; }

.footer { background: #0f172a; color: #cbd5e1; padding: 60px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: #fff; font-size: 17px; font-weight: 600; margin-bottom: 20px; }
.footer-col p { font-size: 14px; line-height: 1.7; margin-bottom: 10px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; transition: color 0.3s; }
.footer-col ul li a:hover { color: #60a5fa; }
.footer-bottom { border-top: 1px solid #1e293b; padding-top: 20px; text-align: center; font-size: 13px; color: #94a3b8; }

@media (max-width: 992px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .product-detail-item, .product-detail-item.reverse { grid-template-columns: 1fr; }
    .product-detail-item.reverse .product-detail-img { order: 0; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .packaging-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-menu-btn { display: flex; }
    .hero-content h1 { font-size: 32px; }
    .hero-content p { font-size: 16px; }
    .section { padding: 50px 0; }
    .section-title h2 { font-size: 26px; }
    .page-banner-content h1 { font-size: 30px; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { text-align: center; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 576px) {
    .features-grid, .products-grid, .advantages-grid, .partners-grid { grid-template-columns: 1fr; }
    .hero { height: 500px; }
    .hero-content h1 { font-size: 26px; }
}