/* ============================================
   VELOY - Anaerobic Gas Generator
   Light Business Style (参照 good-biomed.com)
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #0056A7;
  --primary-dark: #003D7A;
  --primary-light: #E8F0FE;
  --primary-glow: rgba(0,86,167,0.08);
  --accent: #0078D4;
  --accent-light: #F0F6FF;
  --bg: #FFFFFF;
  --bg-gray: #F5F7FA;
  --bg-dark: #141B2D;
  --bg-footer: #0F1626;
  --text: #2D3436;
  --text-light: #636E72;
  --text-lighter: #B2BEC3;
  --text-white: #FFFFFF;
  --border: #E4E8EC;
  --border-light: #F0F2F5;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-blue: 0 4px 20px rgba(0,86,167,0.15);
  --radius: 6px;
  --radius-lg: 10px;
  --radius-xl: 16px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-hei: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-song: "Georgia", "Times New Roman", serif;
  --max-width: 1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); line-height: 1.7; background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
ul { list-style: none; }

/* ---------- Container ---------- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 600; font-family: var(--font-hei); cursor: pointer; transition: var(--transition); border: 2px solid transparent; text-decoration: none; gap: 6px; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-blue); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; box-shadow: var(--shadow-blue); }
.btn-accent { background: linear-gradient(135deg, var(--accent), var(--primary)); color: #fff; font-weight: 700; }
.btn-accent:hover { transform: translateY(-1px); box-shadow: var(--shadow-blue); color: #fff; }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: #f0f0f0; color: var(--primary-dark); }
.btn-sm { padding: 7px 18px; font-size: 0.85rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }

/* ---------- Section ---------- */
.section { padding: 70px 0; }
.section-gray { background: var(--bg-gray); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 12px; font-family: var(--font-hei); }
.section-title h2 span { color: var(--primary); }
.section-title p { color: var(--text-light); font-size: 1.05rem; max-width: 700px; margin: 0 auto; }

/* ---------- Header ---------- */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); transition: var(--transition); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; }
.logo-img { height: 44px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 16px; border-radius: var(--radius); font-size: 0.92rem; font-weight: 500; color: var(--text); transition: var(--transition); font-family: var(--font-hei); }
.nav a:hover, .nav a.active { color: var(--primary); background: var(--primary-light); }
.nav .btn-primary { padding: 7px 18px; color: #fff !important; }
.nav .btn-primary:hover { background: var(--primary-dark); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); transition: var(--transition); }

/* Language Switcher */
.lang-switcher { display: flex; align-items: center; gap: 2px; margin-left: 8px; padding-left: 8px; border-left: 1px solid var(--border); }
.lang-switch-btn { background: none; border: none; color: var(--text-lighter); font-size: 0.8rem; font-weight: 600; cursor: pointer; padding: 4px 6px; border-radius: 4px; transition: var(--transition); font-family: var(--font-hei); }
.lang-switch-btn:hover, .lang-switch-btn.active { color: var(--primary); background: var(--primary-light); }
.lang-divider { color: var(--text-lighter); font-size: 0.8rem; user-select: none; }

/* ---------- Hero Banner ---------- */
.hero { padding: 100px 0 80px; background: linear-gradient(135deg, #0A1628 0%, #142850 40%, #1A3A6B 70%, #0056A7 100%); position: relative; overflow: hidden; margin-top: 68px; }
.hero::before { content: ''; position: absolute; top: -30%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%); border-radius: 50%; }
.hero::after { content: ''; position: absolute; bottom: -20%; left: -5%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%); border-radius: 50%; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-content h1 { font-size: 2.8rem; font-weight: 800; color: #fff; line-height: 1.25; margin-bottom: 20px; font-family: var(--font-hei); }
.hero-content h1 span { color: #64B5F6; }
.hero-content p { font-size: 1.1rem; color: rgba(255,255,255,0.8); line-height: 1.8; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-outline { border-color: rgba(255,255,255,0.5); color: #fff; }
.hero-actions .btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-card { background: rgba(255,255,255,0.1); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-xl); padding: 28px; text-align: center; max-width: 380px; width: 100%; }
.hero-card img { max-width: 100%; height: auto; border-radius: var(--radius-lg); margin-bottom: 16px; }
.hero-card h3 { color: #fff; font-size: 1.2rem; margin-bottom: 6px; font-family: var(--font-hei); }
.hero-card .hero-subtitle { color: rgba(255,255,255,0.7); font-size: 0.9rem; margin-bottom: 12px; }
.hero-card .price-tag { color: #64B5F6; font-size: 1.6rem; font-weight: 800; font-family: var(--font-hei); }
.hero-card .price-tag small { font-size: 0.85rem; color: rgba(255,255,255,0.5); text-decoration: line-through; margin-left: 8px; }
.hero-card .hero-tag { color: #81C784; font-weight: 600; margin-top: 8px; font-family: var(--font-hei); }

/* ---------- Featured Products (2x2 Grid) ---------- */
.featured-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.featured-card { display: flex; gap: 24px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; transition: var(--transition); }
.featured-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.featured-card .fc-img { width: 180px; min-height: 140px; background: var(--bg-gray); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; overflow: hidden; flex-shrink: 0; }
.featured-card .fc-img img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }
.featured-card .fc-img .fc-icon { font-size: 3.5rem; }
.featured-card .fc-body { flex: 1; }
.featured-card .fc-body h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--text); font-family: var(--font-hei); }
.featured-card .fc-body h3 a { color: var(--text); }
.featured-card .fc-body h3 a:hover { color: var(--primary); }
.featured-card .fc-body .fc-features { font-size: 0.88rem; color: var(--text-light); line-height: 1.8; margin-bottom: 12px; }
.featured-card .fc-body .fc-link { font-size: 0.88rem; font-weight: 600; color: var(--primary); font-family: var(--font-hei); }
.featured-card .fc-body .fc-link:hover { text-decoration: underline; }

/* ---------- Application Areas ---------- */
.app-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; text-align: center; }
.app-item { padding: 28px 16px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); transition: var(--transition); }
.app-item:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.app-icon { width: 64px; height: 64px; margin: 0 auto 16px; background: var(--primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; }
.app-item h5 { font-size: 0.95rem; font-weight: 600; color: var(--text); font-family: var(--font-hei); }

/* ---------- Stats Bar ---------- */
.stats-bar { background: var(--primary); padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-item { padding: 8px; }
.stat-number { font-size: 2.4rem; font-weight: 800; color: #fff; font-family: var(--font-hei); margin-bottom: 4px; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.8); }

/* ---------- Hot Products (4-col grid) ---------- */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.product-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-image { height: 200px; background: var(--bg-gray); display: flex; align-items: center; justify-content: center; font-size: 3.5rem; position: relative; overflow: hidden; }
.product-image img { width: 100%; height: 100%; object-fit: contain; padding: 16px; }
.product-badge { position: absolute; top: 10px; right: 10px; background: var(--primary); color: #fff; padding: 4px 12px; border-radius: 20px; font-size: 0.78rem; font-weight: 700; font-family: var(--font-hei); }
.product-info { padding: 20px; }
.product-info h3 { font-size: 1rem; margin-bottom: 6px; color: var(--text); font-family: var(--font-hei); }
.product-info .spec { color: var(--text-light); font-size: 0.82rem; margin-bottom: 10px; }
.product-info .price { font-size: 1.2rem; font-weight: 700; color: var(--primary); margin-bottom: 14px; font-family: var(--font-hei); }
.product-info .price small { font-size: 0.8rem; color: var(--text-lighter); font-weight: 400; margin-left: 4px; }
.view-all { text-align: center; margin-top: 36px; }

/* ---------- News ---------- */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.news-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.news-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.news-image { height: 140px; background: var(--bg-gray); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.news-body { padding: 20px; }
.news-meta { display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-lighter); margin-bottom: 8px; }
.news-category { color: var(--primary); font-weight: 600; }
.news-body h3 { font-size: 0.95rem; color: var(--text); line-height: 1.5; margin-bottom: 8px; font-family: var(--font-hei); }
.news-body h3 a { color: var(--text); }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { font-size: 0.82rem; color: var(--text-light); line-height: 1.6; }

/* ---------- Page Header (sub pages) ---------- */
.page-header { background: linear-gradient(135deg, #0A1628, #1A3A6B); padding: 60px 0; text-align: center; margin-top: 68px; }
.page-header h1 { color: #fff; font-size: 2.2rem; font-weight: 700; font-family: var(--font-hei); }
.page-header h1 span { color: #64B5F6; }
.page-header p { color: rgba(255,255,255,0.8); font-size: 1rem; margin-top: 8px; }

/* ---------- Footer CTA ---------- */
.cta-section { background: linear-gradient(135deg, var(--primary), #003D7A); padding: 56px 0; text-align: center; }
.cta-section h2 { color: #fff; font-size: 1.8rem; margin-bottom: 12px; font-family: var(--font-hei); }
.cta-section p { color: rgba(255,255,255,0.8); font-size: 1rem; margin-bottom: 28px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; font-family: var(--font-hei); }
.footer-col p { font-size: 0.88rem; line-height: 1.8; margin-bottom: 8px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.88rem; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: #fff; }
.newsletter-form { display: flex; gap: 8px; margin-top: 8px; }
.newsletter-form input { flex: 1; padding: 10px 14px; border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius); background: rgba(255,255,255,0.08); color: #fff; font-size: 0.88rem; outline: none; }
.newsletter-form input::placeholder { color: rgba(255,255,255,0.4); }
.newsletter-form input:focus { border-color: rgba(255,255,255,0.5); }
.newsletter-form button { padding: 10px 18px; background: var(--primary); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; font-weight: 600; font-size: 0.88rem; transition: var(--transition); font-family: var(--font-hei); }
.newsletter-form button:hover { background: var(--primary-dark); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.82rem; color: rgba(255,255,255,0.4); }

/* ---------- Form Styles ---------- */
.form-message { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 0.9rem; display: none; }
.form-message.success { display: block; background: #E8F5E9; color: #2E7D32; border: 1px solid #A5D6A7; }
.form-message.error { display: block; background: #FFEBEE; color: #C62828; border: 1px solid #EF9A9A; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group .required { color: #E53935; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 0.95rem; color: var(--text); background: #fff; transition: var(--transition); outline: none; font-family: var(--font); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ---------- Contact Page ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info h3 { font-size: 1.4rem; margin-bottom: 24px; font-family: var(--font-hei); }
.contact-item { display: flex; gap: 16px; margin-bottom: 20px; }
.ci-icon { width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.ci-icon.icon-blue { background: var(--primary-light); }
.ci-icon.icon-green { background: #E8F5E9; }
.ci-icon.icon-orange { background: #FFF3E0; }
.ci-icon.icon-teal { background: #E0F2F1; }
.ci-icon.icon-purple { background: #F3E5F5; }
.contact-item h4 { font-size: 0.95rem; margin-bottom: 4px; color: var(--text); }
.contact-item p { font-size: 0.9rem; color: var(--text-light); }

/* ---------- About Page ---------- */
.about-hero { background: linear-gradient(135deg, #0A1628, #1A3A6B); padding: 60px 0; text-align: center; margin-top: 68px; }
.about-hero h1 { color: #fff; font-size: 2.2rem; font-weight: 700; font-family: var(--font-hei); }
.about-hero p { color: rgba(255,255,255,0.8); }
.about-content { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: center; }
.about-content h2 { font-size: 1.6rem; margin-bottom: 20px; font-family: var(--font-hei); }
.about-visual { font-size: 8rem; text-align: center; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 20px; text-align: center; transition: var(--transition); }
.value-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.value-icon { width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; }
.value-icon.icon-blue { background: var(--primary-light); }
.value-icon.icon-green { background: #E8F5E9; }
.value-icon.icon-orange { background: #FFF3E0; }
.value-icon.icon-purple { background: #F3E5F5; }
.value-card h4 { font-size: 1rem; margin-bottom: 6px; font-family: var(--font-hei); }
.value-card p { font-size: 0.85rem; color: var(--text-light); }

/* ---------- Solutions Page ---------- */
.solution-block { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; padding: 32px 0; border-bottom: 1px solid var(--border); }
.solution-block:last-child { border-bottom: none; }
.solution-block.reverse { direction: rtl; }
.solution-block.reverse .solution-text { direction: ltr; }
.solution-icon { width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 16px; }
.solution-icon.icon-blue { background: var(--primary-light); }
.solution-icon.icon-green { background: #E8F5E9; }
.solution-icon.icon-orange { background: #FFF3E0; }
.solution-icon.icon-purple { background: #F3E5F5; }
.solution-text h2 { font-size: 1.3rem; margin-bottom: 12px; font-family: var(--font-hei); }
.solution-text p { color: var(--text-light); font-size: 0.92rem; margin-bottom: 8px; }
.solution-text ul { margin: 8px 0 12px 20px; list-style: disc; }
.solution-text ul li { font-size: 0.9rem; color: var(--text-light); padding: 3px 0; }
.solution-visual { font-size: 6rem; }

/* ---------- Trial Page ---------- */
.trial-hero { background: linear-gradient(135deg, #0A1628, #1A3A6B); padding: 60px 0; text-align: center; margin-top: 68px; }
.trial-hero h1 { color: #fff; font-size: 2.2rem; font-weight: 700; font-family: var(--font-hei); }
.trial-hero p { color: rgba(255,255,255,0.8); font-size: 1rem; margin-top: 8px; }
.trial-content { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.trial-benefits h2 { font-size: 1.4rem; margin-bottom: 24px; font-family: var(--font-hei); }
.benefit-item { display: flex; gap: 16px; margin-bottom: 20px; }
.benefit-icon { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.benefit-icon.icon-blue { background: var(--primary-light); }
.benefit-icon.icon-green { background: #E8F5E9; }
.benefit-icon.icon-orange { background: #FFF3E0; }
.benefit-icon.icon-purple { background: #F3E5F5; }
.benefit-text h4 { font-size: 1rem; margin-bottom: 4px; }
.benefit-text p { font-size: 0.88rem; color: var(--text-light); }

/* ---------- Comparison Table ---------- */
.comparison-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.comparison-table th { background: var(--primary); color: #fff; padding: 14px 18px; font-size: 0.92rem; font-weight: 600; font-family: var(--font-hei); text-align: left; }
.comparison-table td { padding: 12px 18px; border-bottom: 1px solid var(--border); font-size: 0.9rem; color: var(--text); }
.comparison-table tr:hover td { background: var(--bg-gray); }
.comparison-table td.highlight { color: var(--primary); font-weight: 600; }

/* ---------- Features Grid ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 24px; transition: var(--transition); }
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-icon { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 16px; }
.feature-icon.icon-green { background: #E8F5E9; }
.feature-icon.icon-blue { background: var(--primary-light); }
.feature-icon.icon-orange { background: #FFF3E0; }
.feature-icon.icon-purple { background: #F3E5F5; }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; font-family: var(--font-hei); }
.feature-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }

/* ---------- Trust Bar ---------- */
.trust-bar { background: var(--bg-gray); padding: 24px 0; }
.trust-logos { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; align-items: center; }
.trust-logo { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }

/* ---------- English Font Overrides ---------- */
html[lang="en"] {
  --font: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-hei: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-song: "Georgia", "Times New Roman", serif;
  letter-spacing: 0;
}
html[lang="zh-CN"] {
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-hei: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-song: "Georgia", "Times New Roman", serif;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { order: -1; }
  .hero-actions { justify-content: center; }
  .featured-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .trial-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .header .container { height: 60px; }
  .logo-img { height: 34px; }
  .nav { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); padding: 12px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; width: 100%; }
  .nav-toggle { display: flex; }
  .lang-switcher { margin-left: 0; padding-left: 0; border-left: none; padding-top: 8px; margin-top: 8px; border-top: 1px solid var(--border); width: 100%; justify-content: center; }
  .lang-switch-btn { font-size: 1rem; padding: 8px 14px; }
  .hero { padding: 60px 0 48px; }
  .hero-content h1 { font-size: 2rem; }
  .section { padding: 48px 0; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .featured-card { flex-direction: column; }
  .featured-card .fc-img { width: 100%; min-height: 160px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .trust-logos { gap: 16px; }
  .solution-block { grid-template-columns: 1fr; }
  .solution-visual { display: none; }
}

/* ---------- Animations ---------- */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate { animation: fadeInUp 0.6s ease forwards; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-gray); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }
::selection { background: var(--primary); color: #fff; }