/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --primary: #0a4a8c;
    --primary-dark: #063664;
    --primary-light: #1a6bbf;
    --accent: #00a3e0;
    --text-dark: #1a2a3a;
    --text-mid: #4a5a6a;
    --text-light: #7a8a9a;
    --bg-light: #f5f8fc;
    --bg-white: #ffffff;
    --border: #e1e8f0;
    --shadow-sm: 0 2px 8px rgba(10, 74, 140, 0.08);
    --shadow-md: 0 4px 20px rgba(10, 74, 140, 0.1);
    --shadow-lg: 0 8px 40px rgba(10, 74, 140, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== Buttons ===== */
.btn {
    display: inline-block; padding: 12px 28px; border-radius: var(--radius);
    font-weight: 600; font-size: 15px; text-align: center; cursor: pointer;
    border: 2px solid transparent; transition: var(--transition);
}
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover {
    background: var(--primary-dark); border-color: var(--primary-dark); color: white;
    transform: translateY(-2px); box-shadow: var(--shadow-md);
}
.btn-secondary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-secondary:hover { background: #008fc5; border-color: #008fc5; color: white; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }
.btn-outline-light { background: transparent; color: white; border-color: white; }
.btn-outline-light:hover { background: white; color: var(--primary); }
.btn-full { width: 100%; }

/* ===== Top Bar ===== */
.top-bar {
    background: var(--primary-dark); color: rgba(255,255,255,0.85);
    font-size: 13px; padding: 8px 0;
}
.top-bar-inner { display: flex; justify-content: space-between; align-items: center; }
.top-bar-left strong { color: white; }
.top-bar-right a { color: rgba(255,255,255,0.85); font-weight: 500; }
.top-bar-right a:hover { color: var(--accent); }

/* ===== Header ===== */
.header {
    background: white; box-shadow: var(--shadow-sm);
    position: sticky; top: 0; z-index: 100;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; }
.logo img { height: 48px; }

/* ===== Navigation ===== */
.nav ul { display: flex; list-style: none; gap: 4px; }
.nav > ul > li { position: relative; }
.nav > ul > li > a {
    display: block; padding: 10px 14px; color: var(--text-dark);
    font-weight: 500; font-size: 14px; border-radius: var(--radius);
}
.nav > ul > li > a:hover, .nav > ul > li > a.active { color: var(--primary); background: var(--bg-light); }
.nav .has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown {
    position: absolute; top: 100%; left: 0; min-width: 220px;
    background: white; border-radius: var(--radius); box-shadow: var(--shadow-lg);
    padding: 8px; opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition);
}
.dropdown a {
    display: block; padding: 10px 14px; color: var(--text-mid);
    border-radius: 6px; font-size: 14px;
}
.dropdown a:hover { background: var(--bg-light); color: var(--primary); }

.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.mobile-menu-btn span {
    display: block; width: 24px; height: 3px; background: var(--text-dark);
    margin: 5px 0; border-radius: 2px; transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 560px;
    display: flex; align-items: center; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(6,54,100,0.88) 0%, rgba(10,74,140,0.72) 50%, rgba(0,163,224,0.5) 100%);
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 680px; color: white; }
.hero-subtitle {
    display: inline-block; background: rgba(255,255,255,0.18);
    backdrop-filter: blur(10px); padding: 6px 16px; border-radius: 30px;
    font-size: 14px; margin-bottom: 20px; border: 1px solid rgba(255,255,255,0.3);
}
.hero h1 { font-size: 42px; font-weight: 700; line-height: 1.25; margin-bottom: 20px; }
.hero-desc { font-size: 17px; line-height: 1.7; margin-bottom: 32px; opacity: 0.9; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== Stats Section ===== */
.stats-section { background: var(--primary); color: white; padding: 50px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stats-grid-6 { grid-template-columns: repeat(6, 1fr); }
.stat-value { font-size: 38px; font-weight: 700; margin-bottom: 6px; color: white; }
.stat-label { font-size: 14px; opacity: 0.85; }

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 50px; }
.section-tag {
    display: inline-block; color: var(--accent); font-weight: 600; font-size: 14px;
    text-transform: uppercase; letter-spacing: 2px; margin-bottom: 12px;
}
.section-header h2 { font-size: 34px; font-weight: 700; margin-bottom: 14px; color: var(--text-dark); }
.section-desc { color: var(--text-mid); font-size: 16px; }
.section-footer { text-align: center; margin-top: 40px; }

/* ===== Page Header ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white; padding: 80px 0; text-align: center;
}
.page-header h1 { font-size: 38px; margin-bottom: 12px; }
.page-header p { font-size: 17px; opacity: 0.9; max-width: 600px; margin: 0 auto; }

/* ===== Breadcrumb ===== */
.breadcrumb-section { background: var(--bg-light); padding: 14px 0; border-bottom: 1px solid var(--border); }
.breadcrumb { font-size: 14px; color: var(--text-mid); }
.breadcrumb a { color: var(--text-mid); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }
.breadcrumb .current { color: var(--text-dark); font-weight: 500; }

/* ===== Product Cards ===== */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
    background: white; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-img {
    display: block; position: relative; aspect-ratio: 1;
    background: var(--bg-light); overflow: hidden;
}
.product-img img {
    width: 100%; height: 100%; object-fit: contain; padding: 20px; transition: var(--transition);
}
.product-card:hover .product-img img { transform: scale(1.05); }
.product-badge {
    position: absolute; top: 12px; left: 12px;
    background: var(--primary); color: white; font-size: 11px;
    padding: 4px 10px; border-radius: 20px; font-weight: 500;
}
.product-info { padding: 18px 20px 20px; }
.product-info h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.product-info h3 a { color: var(--text-dark); }
.product-info h3 a:hover { color: var(--primary); }
.product-info h4 { font-size: 14px; font-weight: 600; line-height: 1.4; }
.product-info h4 a { color: var(--text-dark); }
.product-oe { color: var(--accent); font-size: 13px; font-weight: 500; margin-bottom: 10px; }
.product-link { font-size: 13px; font-weight: 600; }

/* ===== Product Filter ===== */
.product-filter {
    display: flex; gap: 10px; margin-bottom: 32px;
    flex-wrap: wrap; justify-content: center;
}
.filter-btn {
    padding: 10px 22px; border: 2px solid var(--border);
    background: white; color: var(--text-mid); border-radius: 30px;
    cursor: pointer; font-size: 14px; font-weight: 500; transition: var(--transition);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: white; }
.no-results { text-align: center; padding: 60px 0; color: var(--text-light); }

/* ===== Categories Grid ===== */
.categories-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.category-card {
    background: white; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.category-img { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.category-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.category-card:hover .category-img img { transform: scale(1.05); }
.category-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to bottom, transparent 40%, rgba(6,54,100,0.7));
    display: flex; align-items: flex-end; justify-content: center; padding-bottom: 20px;
}
.category-icon { font-size: 32px; font-weight: 700; color: white; letter-spacing: 2px; }
.category-content { padding: 24px; }
.category-content h3 { font-size: 19px; margin-bottom: 10px; }
.category-content p { color: var(--text-mid); font-size: 14px; margin-bottom: 8px; }
.category-count { color: var(--accent); font-weight: 600; font-size: 14px; margin-bottom: 16px !important; }

/* ===== About Preview ===== */
.about-preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-preview-img img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.about-preview-content h2 { font-size: 32px; margin: 10px 0 24px; }
.about-features { margin: 30px 0; }
.about-feature { display: flex; gap: 14px; margin-bottom: 18px; }
.feature-icon {
    width: 40px; height: 40px; background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700; flex-shrink: 0;
}
.about-feature h4 { font-size: 17px; margin-bottom: 4px; }
.about-feature p { color: var(--text-mid); font-size: 14px; }

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
    color: white; padding: 70px 0; text-align: center;
}
.cta-content { max-width: 680px; margin: 0 auto; }
.cta-content h2 { font-size: 32px; margin-bottom: 14px; }
.cta-content p { font-size: 17px; opacity: 0.9; margin-bottom: 28px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Product Detail ===== */
.product-detail-section { padding: 50px 0; }
.product-detail-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 50px; margin-bottom: 50px;
}
.product-gallery .gallery-main {
    background: var(--bg-light); border-radius: var(--radius-lg);
    padding: 30px; margin-bottom: 16px; aspect-ratio: 1;
    display: flex; align-items: center; justify-content: center;
}
.product-gallery .gallery-main img { max-height: 400px; object-fit: contain; }
.gallery-thumbs { display: flex; gap: 10px; flex-wrap: wrap; }
.thumb-btn {
    width: 70px; height: 70px; border: 2px solid var(--border);
    border-radius: var(--radius); background: white; cursor: pointer;
    padding: 6px; transition: var(--transition);
}
.thumb-btn.active, .thumb-btn:hover { border-color: var(--primary); }
.thumb-btn img { width: 100%; height: 100%; object-fit: contain; }

.product-detail-info h1 { font-size: 26px; margin: 10px 0 16px; line-height: 1.3; }
.product-category-tag {
    display: inline-block; background: var(--bg-light); color: var(--primary);
    padding: 4px 12px; border-radius: 20px; font-size: 13px; font-weight: 500;
}
.product-oe-nums {
    background: var(--bg-light); padding: 12px 16px; border-radius: var(--radius);
    margin: 16px 0; font-size: 14px;
}
.product-fit { margin: 16px 0; color: var(--text-mid); font-size: 15px; line-height: 1.6; }
.product-cta { display: flex; gap: 12px; margin: 24px 0; flex-wrap: wrap; }
.product-contact-box {
    background: var(--bg-light); padding: 20px; border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}
.product-contact-box h4 { margin-bottom: 10px; color: var(--primary); }
.product-contact-box p { margin-bottom: 6px; font-size: 14px; }

.product-specs {
    background: white; border-radius: var(--radius-lg); padding: 30px;
    box-shadow: var(--shadow-sm); margin-bottom: 50px;
}
.product-specs h3 {
    font-size: 22px; margin-bottom: 20px;
    padding-bottom: 12px; border-bottom: 2px solid var(--border);
}
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td {
    padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border);
}
.spec-table th { background: var(--bg-light); width: 30%; font-weight: 600; color: var(--primary); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }

.related-products h3 { font-size: 22px; margin-bottom: 24px; }

/* ===== About Page ===== */
.about-content-grid { display: grid; grid-template-columns: 3fr 2fr; gap: 50px; align-items: start; }
.about-text h2 { font-size: 30px; margin: 10px 0 20px; }
.about-text p { margin-bottom: 16px; color: var(--text-mid); line-height: 1.8; }
.about-side-img img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
    background: white; padding: 28px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-card h4 { font-size: 18px; margin-bottom: 10px; color: var(--primary); }
.feature-card p { color: var(--text-mid); font-size: 14px; line-height: 1.6; }

.mission-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.mission-card {
    text-align: center; padding: 40px 30px; background: var(--bg-light);
    border-radius: var(--radius-lg); transition: var(--transition);
}
.mission-card:hover { background: white; box-shadow: var(--shadow-md); transform: translateY(-4px); }
.mission-icon {
    width: 60px; height: 60px; background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 700; margin: 0 auto 20px;
}
.mission-card h3 { font-size: 22px; margin-bottom: 12px; color: var(--primary); }
.mission-card p { color: var(--text-mid); line-height: 1.7; }

/* ===== Equipment Page ===== */
.equipment-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.equipment-item {
    position: relative; border-radius: var(--radius-lg); overflow: hidden;
    aspect-ratio: 1; box-shadow: var(--shadow-sm); cursor: pointer;
}
.equipment-item img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.equipment-item:hover img { transform: scale(1.08); }
.equipment-caption {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(6,54,100,0.9));
    color: white; padding: 30px 16px 14px; font-weight: 500;
    font-size: 14px; transform: translateY(100%); transition: var(--transition);
}
.equipment-item:hover .equipment-caption { transform: translateY(0); }

.capabilities-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.capability-card {
    background: white; padding: 30px; border-radius: var(--radius-lg);
    text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition);
}
.capability-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.capability-icon {
    width: 60px; height: 60px; background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 700; margin: 0 auto 16px;
}
.capability-card h3 { font-size: 18px; margin-bottom: 10px; }
.capability-card p { color: var(--text-mid); font-size: 14px; line-height: 1.6; }

/* ===== Services Page ===== */
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.service-card {
    background: white; padding: 36px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); display: flex; gap: 24px; transition: var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-icon {
    width: 56px; height: 56px; background: var(--primary); color: white;
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    font-size: 22px; font-weight: 700; flex-shrink: 0;
}
.service-card h3 { font-size: 20px; margin-bottom: 10px; color: var(--primary); }
.service-card p { color: var(--text-mid); line-height: 1.7; }

.process-steps {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 20px; text-align: center;
}
.step {
    background: white; padding: 30px 20px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); position: relative;
}
.step-num {
    width: 48px; height: 48px; background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 700; margin: 0 auto 16px;
}
.step h4 { font-size: 16px; margin-bottom: 8px; }
.step p { font-size: 13px; color: var(--text-mid); line-height: 1.5; }

/* ===== News ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.news-card {
    background: white; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-img { display: block; aspect-ratio: 16/10; overflow: hidden; }
.news-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.news-card:hover .news-img img { transform: scale(1.05); }
.news-content { padding: 24px; }
.news-date { color: var(--accent); font-size: 13px; font-weight: 500; margin-bottom: 8px; display: block; }
.news-content h3 { font-size: 18px; margin-bottom: 10px; line-height: 1.4; }
.news-content h3 a { color: var(--text-dark); }
.news-content h3 a:hover { color: var(--primary); }
.news-content p { color: var(--text-mid); font-size: 14px; margin-bottom: 14px; line-height: 1.6; }
.read-more { font-weight: 600; font-size: 14px; }

.news-detail { max-width: 800px; margin: 0 auto; }
.news-detail h1 { font-size: 30px; margin: 14px 0 30px; line-height: 1.3; }
.news-detail-content h3 { font-size: 20px; margin: 28px 0 12px; color: var(--primary); }
.news-detail-content p { margin-bottom: 16px; line-height: 1.8; color: var(--text-mid); }
.news-back { margin-top: 40px; text-align: center; }

/* ===== Contact Page ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info h2 { font-size: 28px; margin-bottom: 14px; }
.contact-intro { color: var(--text-mid); margin-bottom: 30px; line-height: 1.7; }
.contact-items { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
    display: flex; gap: 16px; padding: 16px;
    background: var(--bg-light); border-radius: var(--radius);
}
.contact-icon {
    width: 40px; height: 40px; background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 700; flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; margin-bottom: 4px; color: var(--primary); }
.contact-item p { font-size: 14px; color: var(--text-mid); margin-bottom: 2px; }

.contact-form-card {
    background: white; padding: 36px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}
.contact-form-card h2 { font-size: 24px; margin-bottom: 8px; }
.form-note { color: var(--text-mid); margin-bottom: 24px; font-size: 14px; }
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block; font-size: 14px; font-weight: 500;
    margin-bottom: 6px; color: var(--text-dark);
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px; border: 1.5px solid var(--border);
    border-radius: var(--radius); font-size: 14px; font-family: inherit;
    transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(10,74,140,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-success {
    margin-top: 20px; padding: 20px; background: #e8f5e9;
    border-radius: var(--radius); color: #2e7d32; font-size: 14px;
}
.form-success p { margin-bottom: 8px; }

/* ===== Footer ===== */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px; padding-bottom: 40px;
}
.footer-col h4 { color: white; font-size: 16px; margin-bottom: 20px; }
.footer-about { font-size: 14px; line-height: 1.7; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,0.7); font-size: 14px; }
.footer-links a:hover { color: var(--accent); }
.footer-contact { list-style: none; font-size: 14px; }
.footer-contact li { margin-bottom: 10px; }
.footer-contact a { color: rgba(255,255,255,0.7); }
.footer-contact a:hover { color: var(--accent); }
.footer-contact strong { color: white; display: block; margin-bottom: 4px; }
.contact-icon-txt { color: rgba(255,255,255,0.5); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0; text-align: center; font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .equipment-grid { grid-template-columns: repeat(3, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid-6 { grid-template-columns: repeat(3, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .top-bar { display: none; }
    .hero h1 { font-size: 28px; }
    .hero { min-height: 440px; }
    .hero-desc { font-size: 15px; }
    
    .nav {
        position: fixed; top: 0; right: -100%;
        width: 280px; height: 100vh; background: white;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease; padding: 80px 20px 20px;
    }
    .nav.active { right: 0; }
    .nav ul { flex-direction: column; gap: 0; }
    .nav > ul > li > a {
        padding: 14px 16px; border-bottom: 1px solid var(--border); border-radius: 0;
    }
    .dropdown {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; padding: 0 0 0 20px; background: transparent;
    }
    
    .mobile-menu-btn { display: block; z-index: 101; }
    
    .section { padding: 50px 0; }
    .page-header { padding: 50px 0; }
    .page-header h1 { font-size: 28px; }
    .section-header h2 { font-size: 26px; }
    
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .stats-grid-6 { grid-template-columns: repeat(2, 1fr); }
    .stat-value { font-size: 28px; }
    
    .categories-grid { grid-template-columns: 1fr; gap: 20px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .equipment-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: 1fr; }
    .capabilities-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .mission-grid { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    
    .about-preview-grid { grid-template-columns: 1fr; gap: 30px; }
    .about-content-grid { grid-template-columns: 1fr; gap: 30px; }
    .product-detail-grid { grid-template-columns: 1fr; gap: 30px; }
    .contact-grid { grid-template-columns: 1fr; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    
    .cta-content h2 { font-size: 24px; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
    .equipment-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 24px; }
    .product-filter { justify-content: flex-start; }
}