/* ===== Novilink Systems Inc - Official Website Styles ===== */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --navy-900: #0a1f3c;
  --navy-800: #0d2a52;
  --navy-700: #143463;
  --navy-600: #1a4480;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --accent: #06b6d4;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow-xs: 0 1px 3px rgba(10, 31, 60, 0.06);
  --shadow: 0 4px 24px rgba(10, 31, 60, 0.08);
  --shadow-md: 0 8px 32px rgba(10, 31, 60, 0.12);
  --shadow-lg: 0 16px 56px rgba(10, 31, 60, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
  --header-h: 72px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; }

::selection { background: var(--blue-100); color: var(--navy-900); }

/* --- Layout --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.bg-gray-50 { background: var(--gray-50); }
.bg-navy { background: var(--navy-900); color: var(--white); }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h4 { font-size: 1.125rem; }
p { color: var(--gray-600); }

.section-title { text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--gray-500); font-size: 1.125rem; max-width: 720px; margin: 0 auto 56px; line-height: 1.7; }
.text-center { text-align: center; }
.text-blue { color: var(--blue-600); }
.text-white { color: var(--white); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-sm); font-weight: 600;
  font-size: 0.95rem; cursor: pointer; border: none; transition: var(--transition);
  white-space: nowrap; position: relative; overflow: hidden;
}
.btn::after {
  content: ''; position: absolute; inset: 0; background: rgba(255,255,255,0.15);
  transform: translateX(-100%); transition: transform 0.5s ease;
}
.btn:hover::after { transform: translateX(0); }
.btn-primary { background: var(--blue-600); color: var(--white); }
.btn-primary:hover { background: var(--navy-700); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3); }
.btn-outline { background: transparent; border: 2px solid var(--white); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--navy-900); transform: translateY(-2px); }
.btn-navy { background: var(--navy-900); color: var(--white); }
.btn-navy:hover { background: var(--navy-700); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(10, 31, 60, 0.3); }
.btn-sm { padding: 10px 24px; font-size: 0.875rem; }

/* --- Header / Navigation --- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--gray-200); transition: var(--transition);
}
.header.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.06); }

.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.35rem; color: var(--navy-900); }
.logo-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--navy-800), var(--blue-600));
  display: flex; align-items: center; justify-content: center; color: white;
  font-size: 1.1rem; font-weight: 800; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}
.logo span { background: linear-gradient(135deg, var(--navy-800), var(--blue-600)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-menu a { font-weight: 500; color: var(--gray-700); font-size: 0.95rem; transition: var(--transition); position: relative; }
.nav-menu a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--blue-600); transition: var(--transition); border-radius: 1px; }
.nav-menu a:hover { color: var(--blue-600); }
.nav-menu a:hover::after { width: 100%; }
.nav-menu a.active { color: var(--blue-600); }
.nav-menu a.active::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 16px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--navy-900); transition: var(--transition); border-radius: 2px; }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 50%, var(--navy-600) 100%);
  overflow: hidden; padding-top: var(--header-h);
}
.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" width="80" height="80" viewBox="0 0 80 80"><path d="M40 0v80M0 40h80" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></svg>');
}
.hero-glow {
  position: absolute; width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
  top: 10%; right: -10%; filter: blur(40px);
}
.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 20px; border-radius: 100px; color: var(--blue-400);
  font-size: 0.85rem; font-weight: 500; margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero h1 { color: var(--white); margin-bottom: 24px; }
.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--blue-400), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { color: rgba(255, 255, 255, 0.75); font-size: 1.2rem; margin-bottom: 40px; max-width: 640px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  margin-top: 64px; padding-top: 48px; border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.hero-stat-num { font-size: 2.5rem; font-weight: 800; color: var(--white); }
.hero-stat-label { color: rgba(255, 255, 255, 0.6); font-size: 0.9rem; margin-top: 4px; }

.hero-visual {
  position: absolute; right: -5%; top: 50%; transform: translateY(-50%);
  width: 500px; height: 500px; opacity: 0.9; z-index: 1;
}
.hero-visual .orbit {
  position: absolute; border: 1px solid rgba(96, 165, 250, 0.2); border-radius: 50%;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
}
.hero-visual .orbit:nth-child(1) { width: 200px; height: 200px; animation: spin 20s linear infinite; }
.hero-visual .orbit:nth-child(2) { width: 320px; height: 320px; animation: spin 30s linear infinite reverse; }
.hero-visual .orbit:nth-child(3) { width: 450px; height: 450px; animation: spin 40s linear infinite; }
.hero-visual .node {
  position: absolute; width: 48px; height: 48px; border-radius: 12px;
  background: rgba(37, 99, 235, 0.2); border: 1px solid rgba(96, 165, 250, 0.4);
  display: flex; align-items: center; justify-content: center; color: var(--blue-400);
}
@keyframes spin { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(360deg); } }

/* --- Cards --- */
.card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--gray-200);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

/* --- Stats Bar --- */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-lg); margin-top: -48px; position: relative; z-index: 10; overflow: hidden; }
.stat-item { text-align: center; padding: 36px 24px; border-right: 1px solid var(--gray-200); transition: var(--transition); }
.stat-item:hover { background: var(--gray-50); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 2.5rem; font-weight: 800; color: var(--navy-900); }
.stat-label { color: var(--gray-500); font-size: 0.9rem; margin-top: 4px; }

/* --- Feature Grid --- */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; }
.feature-card {
  padding: 36px 28px; border-radius: var(--radius); background: var(--white);
  border: 1px solid var(--gray-200); transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--accent)); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease;
}
.feature-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 56px; height: 56px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  color: var(--blue-600); font-size: 1.5rem; transition: var(--transition);
}
.feature-card:hover .feature-icon { transform: scale(1.1) rotate(-5deg); }
.feature-card h3 { margin-bottom: 12px; font-size: 1.25rem; }
.feature-card p { font-size: 0.95rem; line-height: 1.7; }

/* --- Product Section --- */
.product-filters { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-bottom: 48px; }
.filter-btn {
  padding: 10px 24px; border-radius: 100px; border: 1px solid var(--gray-300);
  background: var(--white); color: var(--gray-600); font-weight: 500; font-size: 0.9rem;
  cursor: pointer; transition: var(--transition);
}
.filter-btn:hover { border-color: var(--blue-400); color: var(--blue-600); background: var(--blue-50); }
.filter-btn.active { background: var(--navy-900); color: var(--white); border-color: var(--navy-900); }

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 28px; }
.product-card { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); transition: var(--transition); display: flex; flex-direction: column; }
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--blue-400); }
.product-image {
  width: 100%; height: 220px; background: var(--gray-50); display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
}
.product-image img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.4s ease; padding: 16px; }
.product-card:hover .product-image img { transform: scale(1.08); }
.product-image .placeholder {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  color: var(--gray-400); font-size: 0.9rem;
}
.product-badge {
  position: absolute; top: 12px; left: 12px;
  background: rgba(10, 31, 60, 0.9); color: var(--white);
  padding: 4px 12px; border-radius: 100px; font-size: 0.75rem; font-weight: 600;
  backdrop-filter: blur(8px); z-index: 1;
}
.product-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.product-model { color: var(--blue-600); font-weight: 700; font-size: 1.05rem; margin-bottom: 8px; }
.product-desc { color: var(--gray-600); font-size: 0.875rem; line-height: 1.6; margin-bottom: 16px; flex: 1; }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.spec-tag { background: var(--gray-100); color: var(--gray-600); padding: 3px 10px; border-radius: var(--radius-xs); font-size: 0.75rem; font-weight: 500; }
.product-link { color: var(--blue-600); font-weight: 600; font-size: 0.85rem; display: inline-flex; align-items: center; gap: 4px; transition: var(--transition); }
.product-link:hover { gap: 8px; }

/* --- Solutions --- */
.solution-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  height: 380px; display: flex; align-items: flex-end;
  background: var(--navy-900); transition: var(--transition);
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.solution-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,31,60,0.95) 0%, rgba(10,31,60,0.5) 50%, transparent 100%); z-index: 1; }
.solution-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.5; transition: transform 0.6s ease; }
.solution-card:hover .solution-bg { transform: scale(1.05); }
.solution-content { position: relative; z-index: 2; padding: 32px; color: var(--white); width: 100%; }
.solution-content h3 { color: var(--white); margin-bottom: 8px; }
.solution-content p { color: rgba(255,255,255,0.8); font-size: 0.9rem; margin-bottom: 16px; }
.solution-link { color: var(--blue-400); font-weight: 600; font-size: 0.85rem; }

/* --- Timeline --- */
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--gray-200); transform: translateX(-50%); }
.timeline-item { position: relative; width: 50%; padding: 0 40px 48px 0; }
.timeline-item:nth-child(even) { margin-left: 50%; padding: 0 0 48px 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute; right: -8px; top: 4px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--blue-600); border: 3px solid var(--white); box-shadow: 0 0 0 4px var(--blue-100);
}
.timeline-item:nth-child(even) .timeline-dot { left: -8px; right: auto; }
.timeline-year { font-size: 1.5rem; font-weight: 800; color: var(--blue-600); margin-bottom: 4px; }
.timeline-item h4 { margin-bottom: 4px; }
.timeline-item p { font-size: 0.9rem; }

/* --- Certifications --- */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 24px; }
.cert-item { text-align: center; padding: 28px 16px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--gray-200); transition: var(--transition); }
.cert-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.cert-badge { width: 56px; height: 56px; margin: 0 auto 12px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; font-weight: 800; color: var(--navy-900); background: linear-gradient(135deg, var(--gray-100), var(--gray-200)); }
.cert-name { font-weight: 600; font-size: 0.85rem; color: var(--gray-700); }

/* --- Contact --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.contact-info-card { background: var(--navy-900); color: var(--white); border-radius: var(--radius); padding: 48px; position: relative; overflow: hidden; }
.contact-info-card::before { content: ''; position: absolute; top: -50%; right: -50%; width: 300px; height: 300px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%); }
.contact-info-card h3 { color: var(--white); margin-bottom: 32px; position: relative; }
.contact-detail { display: flex; gap: 16px; margin-bottom: 24px; position: relative; }
.contact-detail-icon { width: 44px; height: 44px; border-radius: 10px; background: rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; color: var(--blue-400); flex-shrink: 0; }
.contact-detail h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 2px; }
.contact-detail p { color: rgba(255,255,255,0.7); font-size: 0.9rem; }

.contact-form { background: var(--white); border-radius: var(--radius); padding: 48px; border: 1px solid var(--gray-200); box-shadow: var(--shadow); }
.form-group { margin-bottom: 24px; }
.form-label { display: block; font-weight: 600; color: var(--gray-700); margin-bottom: 8px; font-size: 0.9rem; }
.form-input, .form-textarea, .form-select {
  width: 100%; padding: 12px 16px; border: 2px solid var(--gray-200); border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: inherit; transition: var(--transition); background: var(--gray-50);
}
.form-input:focus, .form-textarea:focus, .form-select:focus { outline: none; border-color: var(--blue-500); background: var(--white); box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1); }
.form-textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* --- Footer --- */
.footer { background: var(--navy-900); color: rgba(255,255,255,0.7); padding: 64px 0 32px; position: relative; overflow: hidden; }
.footer::before { content: ''; position: absolute; bottom: -50%; left: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; position: relative; }
.footer-brand .logo { color: var(--white); margin-bottom: 16px; }
.footer-brand p { color: rgba(255,255,255,0.5); font-size: 0.9rem; max-width: 320px; }
.footer-col h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.875rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--blue-400); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 32px; display: flex; justify-content: space-between; align-items: center; position: relative; }
.footer-bottom p { color: rgba(255,255,255,0.4); font-size: 0.85rem; }

/* --- Page Banner --- */
.page-banner { background: linear-gradient(135deg, var(--navy-900), var(--navy-700)); color: var(--white); padding: calc(var(--header-h) + 64px) 0 64px; text-align: center; position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; top: -30%; right: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%); }
.page-banner h1 { color: var(--white); margin-bottom: 16px; position: relative; }
.page-banner p { color: rgba(255,255,255,0.7); font-size: 1.1rem; max-width: 640px; margin: 0 auto; position: relative; }

/* --- CTA Section --- */
.cta-section { background: linear-gradient(135deg, var(--navy-900), var(--navy-700)); color: var(--white); padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; bottom: -30%; left: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.12) 0%, transparent 70%); }
.cta-section h2 { color: var(--white); margin-bottom: 16px; position: relative; }
.cta-section p { color: rgba(255,255,255,0.7); margin-bottom: 32px; font-size: 1.1rem; position: relative; }
.cta-section .btn { position: relative; }

/* --- Product Detail Page --- */
.detail-hero { padding: calc(var(--header-h) + 48px) 0 64px; background: var(--navy-900); color: white; position: relative; overflow: hidden; }
.detail-hero::before { content: ''; position: absolute; top: -30%; right: -10%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%); }
.detail-hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; position: relative; }
.detail-hero-text h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; color: var(--white); }
.detail-hero-text .badge { display: inline-block; background: rgba(37,99,235,0.2); color: var(--blue-400); padding: 6px 16px; border-radius: 999px; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.detail-hero-text .desc { color: rgba(255,255,255,0.7); font-size: 1.05rem; line-height: 1.7; margin-bottom: 24px; }
.detail-hero-text .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.detail-hero-img { display: flex; align-items: center; justify-content: center; background: rgba(255,255,255,0.05); border-radius: var(--radius); padding: 32px; min-height: 320px; }
.detail-hero-img img { max-width: 100%; max-height: 360px; object-fit: contain; }

.spec-table { width: 100%; border-collapse: collapse; background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.spec-table .spec-key { padding: 14px 20px; background: var(--gray-50); font-weight: 600; font-size: 0.9rem; color: var(--navy-800); width: 40%; border-bottom: 1px solid var(--gray-200); }
.spec-table .spec-val { padding: 14px 20px; font-size: 0.9rem; color: var(--gray-600); border-bottom: 1px solid var(--gray-200); line-height: 1.6; }
.spec-table tr:last-child .spec-key, .spec-table tr:last-child .spec-val { border-bottom: none; }
.spec-table tr:hover .spec-key { background: var(--blue-50); }

.feature-list { list-style: none; padding: 0; }
.feature-list li { padding: 10px 0; border-bottom: 1px solid var(--gray-100); font-size: 0.95rem; color: var(--gray-700); display: flex; align-items: flex-start; gap: 8px; }
.feature-list li::before { content: '\2713'; color: var(--blue-600); font-weight: 700; flex-shrink: 0; }
.feature-list li:last-child { border-bottom: none; }

.detail-nav { display: flex; justify-content: space-between; padding: 32px 0; border-top: 1px solid var(--gray-200); margin-top: 48px; }
.detail-nav a { color: var(--blue-500); font-weight: 600; text-decoration: none; transition: var(--transition); padding: 10px 20px; border-radius: var(--radius-sm); }
.detail-nav a:hover { background: var(--blue-50); }
.detail-nav .nav-disabled { color: var(--gray-300); padding: 10px 20px; }

.info-card { background: var(--gray-50); border-radius: var(--radius); padding: 28px; border: 1px solid var(--gray-200); }
.info-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.warranty-badge { display: inline-block; background: var(--blue-50); color: var(--blue-700); padding: 4px 12px; border-radius: var(--radius-xs); font-size: 0.85rem; font-weight: 600; }

.no-specs { padding: 24px; text-align: center; color: var(--gray-500); font-size: 0.95rem; background: var(--gray-50); border-radius: var(--radius); }

/* --- Back to Top --- */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px;
  background: var(--navy-900); color: var(--white); border-radius: 50%; border: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; opacity: 0; transform: translateY(20px); transition: var(--transition);
  z-index: 999; box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--blue-600); transform: translateY(-4px); }

/* --- Breadcrumb --- */
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 24px; font-size: 0.85rem; }
.breadcrumb a { color: var(--gray-500); transition: var(--transition); }
.breadcrumb a:hover { color: var(--blue-600); }
.breadcrumb span { color: var(--gray-400); }

/* --- Animations --- */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-visual { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid var(--gray-200); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .detail-hero .container { grid-template-columns: 1fr; }
  .detail-hero-img { order: -1; }
}
@media (max-width: 768px) {
  .nav-menu { display: none; position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--white); flex-direction: column; padding: 24px; gap: 20px; border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow-lg); }
  .nav-menu.active { display: flex; }
  .nav-toggle { display: flex; }
  .nav-actions { display: none; }
  .section { padding: 64px 0; }
  .hero { min-height: auto; padding: 120px 0 64px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
  .stats-bar { grid-template-columns: 1fr; margin-top: -32px; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--gray-200); }
  .timeline::before { left: 0; }
  .timeline-item, .timeline-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 40px 32px; }
  .timeline-item .timeline-dot, .timeline-item:nth-child(even) .timeline-dot { left: -8px; right: auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .product-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .back-to-top { bottom: 20px; right: 20px; }
}