/* PETOLA — Global Styles */
@import url('https://fonts.googleapis.cn/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px; line-height: 1.7; color: #475569; background: #fff;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 { color: #0f172a; line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }
p { margin-bottom: 1em; }

/* === LAYOUT === */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: #f8fafc; }
.section-blue { background: #eff6ff; }

/* === HEADER / NAV === */
.site-header {
  position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px); border-bottom: 1px solid #e2e8f0;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.06); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; max-width: 1200px; margin: 0 auto; padding: 0 24px;
}
.nav-logo img { height: 40px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 15px; font-weight: 500; color: #475569;
  transition: color 0.3s ease; position: relative;
}
.nav-links a:hover { color: #0B3D91; }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: #0B3D91; transition: width 0.3s ease;
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: #f97316; color: #fff !important; padding: 10px 24px;
  border-radius: 8px; font-weight: 600; font-size: 14px;
  transition: background 0.3s ease, transform 0.2s ease;
}
.nav-cta:hover { background: #ea580c; transform: translateY(-1px); }
.nav-cta::after { display: none !important; }
.hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 8px;
}
.hamburger span {
  width: 24px; height: 2px; background: #0f172a; transition: all 0.3s ease;
  display: block;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Nav */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
    flex-direction: column; justify-content: flex-start; padding-top: 40px;
    gap: 24px; transform: translateX(100%); transition: transform 0.3s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 18px; }
}

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px;
  border-radius: 10px; font-weight: 600; font-size: 16px; cursor: pointer;
  transition: all 0.3s ease; border: 2px solid transparent; text-align: center;
}
.btn-primary {
  background: #f97316; color: #fff; border-color: #f97316;
}
.btn-primary:hover { background: #ea580c; border-color: #ea580c; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(249,115,22,0.3); }
.btn-outline {
  background: transparent; color: #0B3D91; border-color: #0B3D91;
}
.btn-outline:hover { background: #0B3D91; color: #fff; transform: translateY(-2px); }
.btn-white {
  background: #fff; color: #0B3D91; border-color: #fff;
}
.btn-white:hover { background: #eff6ff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
.btn-sm { padding: 10px 20px; font-size: 14px; border-radius: 8px; }
.btn svg { width: 18px; height: 18px; }

/* === HERO === */
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #f0f7ff 50%, #fff 100%);
  padding: 100px 0 80px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(11,61,145,0.04) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-content { max-width: 720px; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: #fff;
  border: 1px solid #e2e8f0; padding: 8px 16px; border-radius: 100px;
  font-size: 13px; font-weight: 600; color: #0B3D91; margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.hero-badge span { color: #f97316; }
.hero h1 { margin-bottom: 20px; }
.hero h1 .highlight { color: #0B3D91; }
.hero-sub {
  font-size: 18px; color: #475569; line-height: 1.8; margin-bottom: 36px; max-width: 600px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* === STATS BAR === */
.stats-bar {
  background: #0B3D91; padding: 48px 0; color: #fff;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center;
}
.stat-item h3 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; color: #fff; margin-bottom: 4px; }
.stat-item p { font-size: 14px; opacity: 0.85; margin: 0; color: rgba(255,255,255,0.85); }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

/* === CARDS === */
.card {
  background: #fff; border-radius: 16px; overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}
.card-img { width: 100%; aspect-ratio: 4/3; object-fit: cover; background: #f8fafc; }
.card-body { padding: 24px; }
.card-tag {
  display: inline-block; font-size: 12px; font-weight: 600; color: #0B3D91;
  background: #eff6ff; padding: 4px 12px; border-radius: 100px; margin-bottom: 12px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.card-title { font-size: 1.15rem; margin-bottom: 8px; }
.card-text { font-size: 14px; color: #64748b; margin-bottom: 12px; }
.card-specs { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.card-specs li {
  font-size: 13px; color: #475569; display: flex; align-items: center; gap: 8px;
}
.card-specs li::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%; background: #3b82f6; flex-shrink: 0;
}
.card-link {
  font-size: 14px; font-weight: 600; color: #f97316; display: inline-flex;
  align-items: center; gap: 6px; transition: gap 0.3s ease;
}
.card-link:hover { gap: 10px; }

/* === PRODUCT GRID === */
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 32px;
}
@media (max-width: 640px) { .product-grid { grid-template-columns: 1fr; } }

/* === CATEGORY CARDS === */
.category-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.category-card {
  background: #fff; border-radius: 16px; padding: 32px 24px; text-align: center;
  border: 1px solid #e2e8f0; transition: all 0.3s ease; cursor: pointer;
}
.category-card:hover {
  border-color: #0B3D91; transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}
.category-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; background: #eff6ff;
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
}
.category-icon svg { width: 32px; height: 32px; color: #0B3D91; }
.category-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.category-card p { font-size: 14px; color: #64748b; margin: 0; }
@media (max-width: 768px) {
  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}

/* === FEATURES / WHY US === */
.features-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
}
.feature-item { text-align: center; padding: 24px; }
.feature-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; background: #eff6ff;
  border-radius: 14px; display: flex; align-items: center; justify-content: center;
}
.feature-icon svg { width: 28px; height: 28px; color: #0B3D91; }
.feature-item h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-item p { font-size: 14px; color: #64748b; margin: 0; }
@media (max-width: 768px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* === CTA BANNER === */
.cta-banner {
  background: linear-gradient(135deg, #0B3D91 0%, #1d4ed8 100%);
  padding: 64px 0; color: #fff; text-align: center;
}
.cta-banner h2 { color: #fff; margin-bottom: 12px; }
.cta-banner p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-white { font-size: 17px; padding: 16px 36px; }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid #e2e8f0; border-radius: 12px; margin-bottom: 12px;
  overflow: hidden; transition: border-color 0.3s ease;
}
.faq-item:hover { border-color: #cbd5e1; }
.faq-question {
  width: 100%; padding: 20px 24px; background: none; border: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 16px; font-weight: 600; color: #0f172a; text-align: left;
}
.faq-question svg {
  width: 20px; height: 20px; color: #94a3b8; transition: transform 0.3s ease; flex-shrink: 0;
}
.faq-item.active .faq-question svg { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 15px; color: #475569; line-height: 1.7; }

/* === FOOTER === */
.site-footer {
  background: #0f172a; color: rgba(255,255,255,0.7); padding: 64px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 16px; }
.footer-brand img { height: 36px; filter: brightness(0) invert(1); }
.footer-col h4 { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); padding: 4px 0; transition: color 0.3s ease; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 0; font-size: 13px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* === BREADCRUMB === */
.breadcrumb {
  padding: 16px 0; font-size: 14px; color: #94a3b8;
}
.breadcrumb a { color: #64748b; transition: color 0.3s; }
.breadcrumb a:hover { color: #0B3D91; }
.breadcrumb span { margin: 0 8px; }

/* === PRODUCT DETAIL === */
.product-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding: 40px 0;
}
.product-gallery {
  border-radius: 16px; overflow: hidden; background: #f8fafc;
}
.product-gallery img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  transition: transform 0.4s ease;
}
.product-gallery:hover img { transform: scale(1.05); }
.product-info h1 { font-size: 2rem; margin-bottom: 8px; }
.product-tagline { font-size: 18px; color: #0B3D91; font-weight: 500; margin-bottom: 16px; }
.product-desc { font-size: 16px; margin-bottom: 24px; }
.product-features { margin-bottom: 24px; }
.product-features li {
  display: flex; align-items: flex-start; gap: 10px; padding: 6px 0;
  font-size: 15px; color: #475569;
}
.product-features li svg { width: 20px; height: 20px; color: #22c55e; flex-shrink: 0; margin-top: 2px; }
.specs-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.specs-table th, .specs-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid #e2e8f0; font-size: 14px;
}
.specs-table th { font-weight: 600; color: #0f172a; width: 35%; background: #f8fafc; }
.specs-table td { color: #475569; }
.product-cta-group { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
@media (max-width: 768px) {
  .product-detail { grid-template-columns: 1fr; gap: 32px; }
}

/* === OEM PROCESS === */
.process-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; text-align: center;
}
.process-step { position: relative; padding: 24px 8px; }
.process-num {
  width: 48px; height: 48px; border-radius: 50%; background: #0B3D91; color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
  font-size: 18px; margin: 0 auto 12px;
}
.process-step h4 { font-size: 14px; margin-bottom: 4px; }
.process-step p { font-size: 12px; color: #64748b; margin: 0; }
@media (max-width: 768px) {
  .process-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 480px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); }
}

/* === CONTACT FORM === */
.contact-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 14px; font-weight: 600; color: #0f172a; margin-bottom: 6px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid #e2e8f0; border-radius: 10px;
  font-size: 15px; color: #0f172a; transition: border-color 0.3s ease;
  background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: #0B3D91; box-shadow: 0 0 0 3px rgba(11,61,145,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* === CONTACT INFO CARD === */
.info-card {
  background: #f8fafc; border-radius: 16px; padding: 32px; border: 1px solid #e2e8f0;
}
.info-card h3 { margin-bottom: 24px; }
.info-item { display: flex; gap: 12px; margin-bottom: 20px; }
.info-item svg { width: 20px; height: 20px; color: #0B3D91; flex-shrink: 0; margin-top: 2px; }
.info-item strong { display: block; font-size: 14px; color: #0f172a; margin-bottom: 2px; }
.info-item span, .info-item a { font-size: 14px; color: #64748b; }
.info-item a:hover { color: #0B3D91; }

/* === BLOG === */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.blog-card { border-radius: 16px; overflow: hidden; background: #fff; border: 1px solid #e2e8f0; transition: all 0.3s ease; }
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
.blog-card-img {
  width: 100%; height: 200px; object-fit: cover; background: linear-gradient(135deg, #eff6ff, #dbeafe);
}
.blog-card-body { padding: 24px; }
.blog-card-date { font-size: 13px; color: #94a3b8; margin-bottom: 8px; }
.blog-card-body h3 { font-size: 1.15rem; margin-bottom: 8px; line-height: 1.4; }
.blog-card-body p { font-size: 14px; color: #64748b; margin-bottom: 12px; }
@media (max-width: 768px) { .blog-grid { grid-template-columns: 1fr; } }

/* === ARTICLE === */
.article-header { text-align: center; max-width: 800px; margin: 0 auto; padding: 40px 0; }
.article-header .card-tag { margin-bottom: 16px; }
.article-header h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 16px; line-height: 1.3; }
.article-meta { font-size: 14px; color: #94a3b8; }
.article-content { max-width: 760px; margin: 0 auto; padding-bottom: 60px; }
.article-content h2 { font-size: 1.5rem; margin: 40px 0 16px; }
.article-content h3 { font-size: 1.2rem; margin: 32px 0 12px; }
.article-content p { font-size: 17px; line-height: 1.8; margin-bottom: 20px; }
.article-content ul, .article-content ol { margin: 16px 0; padding-left: 24px; }
.article-content li { font-size: 16px; margin-bottom: 8px; list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content blockquote {
  border-left: 4px solid #0B3D91; padding: 16px 24px; margin: 24px 0;
  background: #eff6ff; border-radius: 0 12px 12px 0; font-style: italic;
}
.article-content a { color: #0B3D91; text-decoration: underline; }
.article-content a:hover { color: #f97316; }

/* === ANIMATIONS === */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-left {
  opacity: 0; transform: translateX(-24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-left.visible { opacity: 1; transform: translateX(0); }
.fade-in-right {
  opacity: 0; transform: translateX(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-right.visible { opacity: 1; transform: translateX(0); }

/* === SECTION HEADER === */
.section-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-header .overline {
  display: inline-block; font-size: 13px; font-weight: 700; color: #0B3D91;
  text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 12px;
}
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 17px; color: #64748b; margin: 0; }

/* === CERTIFICATIONS BAR === */
.cert-bar {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; padding: 24px 0;
}
.cert-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px;
  background: #fff; border: 1px solid #e2e8f0; border-radius: 100px;
  font-size: 13px; font-weight: 600; color: #0B3D91;
}

/* === WHATSAPP BUTTON === */
.whatsapp-btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 24px;
  background: #25D366; color: #fff; border-radius: 10px; font-weight: 600;
  font-size: 15px; transition: all 0.3s ease;
}
.whatsapp-btn:hover { background: #1da851; transform: translateY(-2px); }
.whatsapp-btn svg { width: 22px; height: 22px; }

/* === 404 === */
.error-page { text-align: center; padding: 120px 24px; }
.error-page h1 { font-size: 6rem; color: #0B3D91; margin-bottom: 8px; }
.error-page h2 { margin-bottom: 16px; }
.error-page p { margin-bottom: 32px; }

/* === UTILITIES === */
.text-center { text-align: center; }
.mt-4 { margin-top: 32px; }
.mb-4 { margin-bottom: 32px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* === OEM SERVICE CARDS === */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: #fff; border-radius: 16px; padding: 32px 24px; border: 1px solid #e2e8f0;
  transition: all 0.3s ease; text-align: center;
}
.service-card:hover { border-color: #0B3D91; transform: translateY(-4px); box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
.service-card .service-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; background: #eff6ff;
  border-radius: 14px; display: flex; align-items: center; justify-content: center;
}
.service-card .service-icon svg { width: 28px; height: 28px; color: #0B3D91; }
.service-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.service-card p { font-size: 14px; color: #64748b; margin: 0; }
@media (max-width: 768px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .service-grid { grid-template-columns: 1fr; } }

/* === OEM STATS === */
.oem-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.oem-stat { padding: 32px 16px; background: #fff; border-radius: 16px; border: 1px solid #e2e8f0; }
.oem-stat h3 { font-size: 2rem; color: #0B3D91; margin-bottom: 4px; }
.oem-stat p { font-size: 14px; color: #64748b; margin: 0; }
@media (max-width: 768px) { .oem-stats { grid-template-columns: repeat(2, 1fr); } }

/* === ABOUT === */
.about-hero { background: linear-gradient(135deg, #eff6ff 0%, #fff 100%); padding: 80px 0; }
.about-content { max-width: 800px; margin: 0 auto; }
.about-content h2 { margin-top: 48px; margin-bottom: 16px; }
.about-content p { font-size: 17px; line-height: 1.8; }
.values-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; margin-top: 32px; }
.value-item { padding: 24px; background: #f8fafc; border-radius: 16px; border: 1px solid #e2e8f0; }
.value-item h3 { font-size: 1.1rem; margin-bottom: 8px; color: #0B3D91; }
.value-item p { font-size: 15px; color: #64748b; margin: 0; }
@media (max-width: 768px) { .values-grid { grid-template-columns: 1fr; } }

/* === RELATED PRODUCTS === */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 768px) { .related-grid { grid-template-columns: 1fr; } }

/* === FILTER NAV === */
.filter-nav {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px;
}
.filter-btn {
  padding: 10px 24px; border-radius: 100px; border: 1px solid #e2e8f0;
  background: #fff; font-size: 14px; font-weight: 500; color: #475569;
  cursor: pointer; transition: all 0.3s ease;
}
.filter-btn:hover, .filter-btn.active { background: #0B3D91; color: #fff; border-color: #0B3D91; }

/* ============================================================
   v2 — DARK IMMERSIVE HERO
   ============================================================ */

/* Transparent header overlay variant (homepage hero) */
.site-header.hero-overlay {
  position: fixed; left: 0; right: 0; top: 0;
  background: transparent; border-bottom: 1px solid transparent;
}
.site-header.hero-overlay .nav-links a { color: rgba(255,255,255,0.85); }
.site-header.hero-overlay .nav-links a:hover { color: #fff; }
.site-header.hero-overlay .nav-links a::after { background: #f97316; }
.site-header.hero-overlay .nav-logo img { filter: brightness(0) invert(1); }
.site-header.hero-overlay .hamburger span { background: #fff; }
.site-header.hero-overlay.solid {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px); border-bottom-color: #e2e8f0;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}
.site-header.hero-overlay.solid .nav-links a { color: #475569; }
.site-header.hero-overlay.solid .nav-links a:hover { color: #0B3D91; }
.site-header.hero-overlay.solid .nav-links a::after { background: #0B3D91; }
.site-header.hero-overlay.solid .nav-logo img { filter: none; }
.site-header.hero-overlay.solid .hamburger span { background: #0f172a; }
.site-header.hero-overlay .nav-cta { color: #fff !important; }

/* Hero shell */
.hero-dark {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  justify-content: center; text-align: center;
  background:
    radial-gradient(1200px 600px at 78% 18%, rgba(29,78,216,0.35), transparent 60%),
    radial-gradient(900px 700px at 15% 82%, rgba(249,115,22,0.12), transparent 60%),
    radial-gradient(800px 500px at 50% 120%, rgba(11,61,145,0.5), transparent 65%),
    linear-gradient(160deg, #0a1428 0%, #0b1a36 42%, #0a1122 100%);
  overflow: hidden; color: #fff; padding: 140px 0 150px;
}
/* Subtle star field */
.hero-dark::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 28% 60%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 68% 18%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 84% 42%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 48% 12%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 92% 70%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 38% 82%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 8% 48%, rgba(255,255,255,0.4), transparent);
  opacity: 0.7;
}
/* Faint floating product silhouettes (real product photos, radial-masked) */
.hero-bg-product {
  position: absolute; border-radius: 24px; object-fit: cover; pointer-events: none;
  -webkit-mask-image: radial-gradient(closest-side, rgba(0,0,0,0.85) 30%, rgba(0,0,0,0.25) 62%, transparent 78%);
  mask-image: radial-gradient(closest-side, rgba(0,0,0,0.85) 30%, rgba(0,0,0,0.25) 62%, transparent 78%);
  mix-blend-mode: luminosity; opacity: 0.5; filter: saturate(0.7) contrast(1.05);
}
.hero-bg-product.right { top: 16%; right: -6%; width: min(46vw, 520px); }
.hero-bg-product.left { bottom: 8%; left: -7%; width: min(34vw, 380px); opacity: 0.35; }
/* Bottom fade into page */
.hero-dark::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 140px;
  background: linear-gradient(to bottom, transparent, #fff); pointer-events: none;
}
.hero-dark .container { position: relative; z-index: 2; }
.hero-dark-content { max-width: 860px; margin: 0 auto; }
.hero-pill {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 22px; border-radius: 100px;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.9);
  font-size: 12.5px; font-weight: 600; letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 32px;
}
.hero-pill .dot { width: 7px; height: 7px; border-radius: 50%; background: #f97316; box-shadow: 0 0 10px rgba(249,115,22,0.8); flex-shrink: 0; }
.hero-dark h1 {
  color: #fff; font-size: clamp(2.5rem, 7vw, 5.2rem); line-height: 1.06;
  font-weight: 800; letter-spacing: -0.03em; margin-bottom: 28px;
}
.hero-dark h1 .grad {
  background: linear-gradient(92deg, #fb923c 0%, #f97316 35%, #fbbf24 70%, #f59e0b 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-dark .hero-sub {
  color: rgba(226,232,240,0.82); font-size: clamp(1rem, 2.2vw, 1.25rem);
  line-height: 1.75; max-width: 640px; margin: 0 auto 40px;
}
.hero-actions-dark { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-glass {
  background: rgba(255,255,255,0.06); color: #fff;
  border: 1.5px solid rgba(255,255,255,0.28);
  backdrop-filter: blur(8px);
}
.btn-glass:hover {
  background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,0.35);
}

/* Floating glass stats bar */
.hero-stats {
  position: relative; z-index: 3; margin: -110px auto 0; max-width: 960px; padding: 0 24px;
}
.hero-stats-inner {
  background: rgba(15,23,42,0.55);
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-radius: 20px;
  display: grid; grid-template-columns: repeat(4,1fr);
  padding: 30px 20px; text-align: center;
  box-shadow: 0 24px 60px rgba(2,8,23,0.35);
}
.hero-stat { position: relative; padding: 0 12px; }
.hero-stat + .hero-stat::before {
  content: ''; position: absolute; left: 0; top: 12%; bottom: 12%;
  width: 1px; background: rgba(255,255,255,0.14);
}
.hero-stat h3 {
  font-size: clamp(1.7rem, 4vw, 2.6rem); font-weight: 800; margin-bottom: 6px;
  background: linear-gradient(180deg, #60a5fa, #93c5fd);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-stat p { font-size: 12px; letter-spacing: 1.2px; text-transform: uppercase; color: rgba(226,232,240,0.7); margin: 0; }
.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 3; color: rgba(226,232,240,0.6); font-size: 11px; letter-spacing: 2.5px;
  text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.scroll-hint svg { width: 20px; height: 20px; animation: bounceDown 2s infinite; }
@keyframes bounceDown { 0%,100%{ transform: translateY(0);} 50%{ transform: translateY(6px);} }
@media (max-width: 768px) {
  .hero-dark { padding: 120px 0 130px; min-height: auto; }
  .hero-bg-product.right { width: 70vw; top: 10%; opacity: 0.3; }
  .hero-bg-product.left { display: none; }
  .hero-stats { margin-top: -70px; }
  .hero-stats-inner { grid-template-columns: repeat(2,1fr); gap: 22px 0; padding: 24px 16px; }
  .hero-stat:nth-child(3)::before { display: none; }
  .scroll-hint { display: none; }
}
@media (max-width: 480px) {
  .hero-dark h1 { font-size: clamp(1.8rem, 8vw, 2.5rem); letter-spacing: -0.02em; }
  .hero-dark .hero-sub { font-size: 0.95rem; padding: 0 8px; }
  .hero-stats-inner { padding: 20px 12px; gap: 18px 0; }
  .hero-stat h3 { font-size: clamp(1.4rem, 6vw, 1.8rem); }
  .hero-stat p { font-size: 10px; letter-spacing: 0.8px; }
  .hero-pill { font-size: 11px; padding: 7px 16px; letter-spacing: 1.5px; }
}

/* v2 product cards — square 1:1 imagery */
.card-img-square { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; background: #f8fafc; }
.card-flagship-ribbon {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: #f97316; color: #fff; font-size: 11px; font-weight: 700;
  letter-spacing: 0.6px; text-transform: uppercase;
  padding: 4px 12px; border-radius: 100px; box-shadow: 0 4px 12px rgba(249,115,22,0.4);
}
.card-media { position: relative; overflow: hidden; }
.card-media img { transition: transform 0.45s ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-mat { font-size: 12.5px; color: #94a3b8; margin-bottom: 14px; font-style: italic; }

/* Product line section anchor offset for sticky header */
.line-section { scroll-margin-top: 90px; }
.line-head { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.line-head h2 { font-size: clamp(1.4rem,3vw,1.9rem); }
.line-count {
  font-size: 13px; font-weight: 600; color: #0B3D91; background: #eff6ff;
  padding: 4px 14px; border-radius: 100px;
}
.line-anchor-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 56px; }