/* ============================================
   New Section Styles: Brands / Hot Sellers / News
   ============================================ */

/* ----- Brands Section ----- */
.brands-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  justify-content: center;
}
.brand-tab {
  background: #fff;
  border: 1px solid var(--color-border);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  transition: var(--transition);
}
.brand-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.brand-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.brand-region { display: none; }
.brand-region.active { display: grid; }
.brands-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.brands-grid .brand-region { gap: 16px; }
@media (max-width: 992px) { .brands-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px)  { .brands-grid { grid-template-columns: repeat(2, 1fr); } }

/* ----- Hot-Selling Projectors ----- */
.hot-sellers { background: var(--color-bg-light); }
.hot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.hot-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}
.hot-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(37,99,235,0.12);
  border-color: var(--color-primary);
}
.hot-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 700;
}
.hot-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
  padding-right: 90px;
}
.hot-spec {
  font-size: 0.82rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.5;
}
.hot-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 14px;
}
.hot-link {
  color: var(--color-primary);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}
.hot-link:hover { color: var(--color-primary-dark); }
@media (max-width: 992px) { .hot-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .hot-grid { grid-template-columns: 1fr; } }

/* ----- News Section ----- */
.news-section { background: #fff; }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  transition: var(--transition);
  border-top: 3px solid var(--color-primary);
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.08);
}
.news-card.news-feature {
  grid-column: span 3;
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  border-top: 0;
  padding: 36px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  align-items: start;
}
.news-card.news-feature .news-date {
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-size: 0.95rem;
  padding: 10px 20px;
  border-radius: 8px;
  white-space: nowrap;
  font-weight: 700;
}
.news-card.news-feature h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.3;
}
.news-card.news-feature p {
  color: rgba(255,255,255,0.92);
  font-size: 1rem;
  line-height: 1.7;
}
.news-card.news-feature .news-tag { background: rgba(255,255,255,0.2); color: #fff; }
.news-date {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.news-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 14px;
}
.news-tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.news-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  background: rgba(37,99,235,0.08);
  color: var(--color-primary);
  border-radius: 12px;
}
@media (max-width: 992px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .news-card.news-feature { grid-column: span 2; grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-card.news-feature { grid-column: span 1; }
}

/* ----- Hero visual with real images ----- */
.hero-img-stack {
  position: relative;
  width: 100%;
  height: 460px;
}
.hero-img-main {
  position: absolute;
  top: 0; right: 0;
  width: 80%;
  height: 320px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}
.hero-img-secondary {
  position: absolute;
  bottom: 0; left: 0;
  width: 55%;
  height: 220px;
  background: #fff;
  border-radius: 16px;
  padding: 8px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.14);
}
.hero-img-secondary img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
}
.hero-img-stat {
  position: absolute;
  bottom: 30px; right: 0;
  background: #fff;
  border-radius: 14px;
  padding: 18px 22px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.18);
  text-align: center;
  min-width: 140px;
  border: 2px solid var(--color-accent);
}
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-top: 6px;
  font-weight: 600;
}
@media (max-width: 992px) {
  .hero-img-stack { height: 380px; }
  .hero-img-main { height: 240px; }
  .hero-img-secondary { height: 170px; }
}
@media (max-width: 600px) {
  .hero-img-stack { height: 320px; margin-top: 20px; }
  .hero-img-main { width: 90%; height: 180px; }
  .hero-img-secondary { width: 60%; height: 130px; }
  .hero-img-stat { padding: 12px 14px; }
  .stat-num { font-size: 1.6rem; }
}

/* ----- Category card with real image hover ----- */
.category-card {
  position: relative;
  overflow: hidden;
}
.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(37,99,235,0.04) 100%);
  pointer-events: none;
}

/* ----- Updated product card with real image ----- */
.product-card { overflow: hidden; }
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}
.product-card:hover .product-image img {
  transform: scale(1.05);
}
.product-image {
  position: relative;
  height: 200px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-image img:not([src=""]):not([src*="undefined"]):not([src*="null"]) {
  display: block;
}

/* ----- Footer enhancements ----- */
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.5;
}
.footer-contact li svg { flex-shrink: 0; margin-top: 2px; }
.footer-contact li a {
  color: rgba(255,255,255,0.78);
  text-decoration: none;
  transition: var(--transition);
}
.footer-contact li a:hover { color: #fff; }
.footer-contact li span { word-break: break-word; }

.footer-bottom { padding: 18px 0; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}
.footer-bottom-inner p { margin: 0; }

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: var(--transition);
}
.social-icon:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

/* ----- Mobile category tap ----- */
@media (max-width: 992px) {
  .inquiry-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { flex-direction: column; }
}
@media (max-width: 600px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ----- Form enhancement ----- */
.form-hint {
  font-size: 0.82rem;
  color: var(--color-text-light);
  text-align: center;
  margin-top: 12px;
}
.btn-block { display: block; width: 100%; }

/* ============================================
   Shared Top Bar / Navbar / Layout Styles
   Used across all 4 pages for consistency
   ============================================ */

/* ----- Top Bar (top-bar with hyphen) ----- */
.top-bar {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  font-size: 0.8rem;
  padding: 8px 0;
}
.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.top-bar-left {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}
.top-bar-right {
  display: flex;
  gap: 16px;
  align-items: center;
}
.top-bar-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}
.top-bar-item:hover { color: #fff; }
.top-bar-item svg { width: 14px; height: 14px; flex-shrink: 0; }
.top-bar-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.top-bar-badge svg { width: 14px; height: 14px; }

/* ----- Navbar (shared) ----- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
  gap: 16px;
}
.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.2;
}
.logo-mark {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.5px;
}
.logo-tag {
  font-size: 0.62rem;
  color: var(--color-text-light);
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

/* Nav toggle button */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Button size variants */
.btn-sm { padding: 6px 16px; font-size: 0.82rem; }
.btn-lg { padding: 12px 32px; font-size: 1rem; }

/* ----- Product image container (products.html) ----- */
.product-img {
  position: relative;
  height: 200px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}
.product-card:hover .product-img img {
  transform: scale(1.05);
}
/* Fallback placeholder when image fails to load */
.product-img .img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-light);
  opacity: 0.4;
}

/* ----- Responsive: Top Bar & Nav ----- */
@media (max-width: 1200px) {
  .top-bar-left .top-bar-item:nth-child(n+5) { display: none; }
}
@media (max-width: 992px) {
  .top-bar-left .top-bar-item:nth-child(n+4) { display: none; }
  .top-bar-right .top-bar-badge { display: none; }
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta .btn-outline { display: none; }
}
@media (max-width: 640px) {
  .top-bar-left .top-bar-item:nth-child(n+3) { display: none; }
  .top-bar-right .top-bar-item span { display: none; }
  .logo-tag { display: none; }
  .nav-cta .btn-sm { padding: 6px 12px; font-size: 0.75rem; }
}

/* ----- Mobile menu (for index.html) ----- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; right: -300px;
  width: 280px;
  height: 100vh;
  background: #fff;
  box-shadow: -4px 0 20px rgba(0,0,0,0.1);
  z-index: 2000;
  padding: 80px 24px 24px;
  transition: right 0.3s ease;
  flex-direction: column;
  gap: 16px;
}
.mobile-menu.open { right: 0; display: flex; }
.mobile-menu a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu a:hover { color: var(--color-primary); }
.mobile-menu-close {
  position: absolute;
  top: 20px; right: 20px;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-text);
}

/* ----- Floating WhatsApp (shared) ----- */
.float-whatsapp, .whatsapp-float {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 56px; height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(37,211,102,0.4);
  transition: var(--transition);
}
.float-whatsapp:hover, .whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(37,211,102,0.5);
}

/* ===== Shusen Smart Projector Series (Redesigned) ===== */

/* Hero with Shusen projector image */
.hero-img-stack {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
  max-width: 560px;
}
.hero-img-main {
  grid-row: 1 / 3;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.04);
  box-shadow: var(--shadow-lg);
}
.hero-img-secondary {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-img-secondary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-img-stat {
  background: linear-gradient(135deg, var(--color-accent), #f59e0b);
  border-radius: var(--radius);
  padding: 16px;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
.hero-img-stat .stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
}
.hero-img-stat .stat-label {
  font-size: 0.75rem;
  margin-top: 4px;
  opacity: 0.9;
}
.hero-img-stat .stat-sub {
  font-size: 0.68rem;
  margin-top: 6px;
  padding: 2px 8px;
  background: rgba(255,255,255,0.18);
  border-radius: 10px;
  font-weight: 600;
}

/* Shusen Smart Projector Series — new showcase */
.shusen-series {
  background: linear-gradient(135deg, #0a1628 0%, #1e3a5f 100%);
  color: #fff;
  padding: 80px 0;
}
.shusen-series .section-header h2 { color: #fff; }
.shusen-series .section-header p { color: rgba(255,255,255,0.78); }
.shusen-series .eyebrow { color: var(--color-accent); }
.series-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.series-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.series-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 12px 32px rgba(245,158,11,0.18);
}
.series-card .img {
  height: 220px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.series-card .img img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}
.series-card .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-accent);
  color: #fff;
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.series-card .body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.series-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: #fff;
}
.series-card .model-tag {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.series-card .spec-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  margin: 8px 0 14px;
}
.series-card .spec-row .item {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.78);
}
.series-card .spec-row .item strong {
  display: block;
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 2px;
}
.series-card .desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.55;
  margin-top: auto;
}
.series-cta {
  text-align: center;
  margin-top: 40px;
  color: rgba(255,255,255,0.85);
}
.series-cta .btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
  background: transparent;
}
.series-cta .btn-outline:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* OEM/ODM redesigned — modern split layout */
.oem-section { background: var(--color-bg-light); }
.oem-section .container { max-width: 1200px; }
.oem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.oem-text .eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.oem-text h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  line-height: 1.2;
}
.oem-text > p {
  color: var(--color-text-light);
  margin-bottom: 24px;
  font-size: 1rem;
  line-height: 1.6;
}
.oem-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 12px;
}
.oem-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--color-text);
}
.oem-features .check {
  width: 22px;
  height: 22px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.oem-features .check svg {
  width: 12px;
  height: 12px;
  color: white;
}
.oem-process-new {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 8px;
}
.oem-process-new .item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
}
.oem-process-new .item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 6px 18px rgba(245,158,11,0.1);
}
.oem-process-new .item .num {
  width: 30px;
  height: 30px;
  background: var(--color-primary-dark);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.oem-process-new .item .name {
  font-weight: 700;
  color: var(--color-primary-dark);
  font-size: 0.95rem;
}
.oem-process-new .item .desc {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

@media (max-width: 1024px) {
  .oem-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* Certificates section */
.certificates-section {
  background: #fff;
  padding: 80px 0;
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.cert-card {
  background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  text-align: center;
  cursor: pointer;
}
.cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}
.cert-card .img-wrap {
  background: #fff;
  padding: 18px;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border);
}
.cert-card .img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.cert-card .info {
  padding: 20px;
}
.cert-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}
.cert-card .cert-no {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.cert-card .cert-desc {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.5;
}
.cert-card .cert-pdf {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}
.cert-card .cert-pdf:hover { color: var(--color-accent); }

@media (max-width: 1024px) {
  .series-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .hero-img-stack { max-width: 100%; }
  .series-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .oem-process-new { grid-template-columns: 1fr; }
  .series-card .img { height: 200px; }
}

/* ===== Shusen Exhibition Gallery (replaces OEM) ===== */
.shusen-exhibition {
  background: linear-gradient(180deg, #f8f9fb 0%, #fff 60%);
  padding: 80px 0;
}
.shusen-exhibition .section-header h2 {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.shusen-exhibition .eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}

/* --- Lead exhibition banner --- */
.exhibition-lead {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  margin: 40px 0 56px;
}
.lead-main {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(15, 23, 42, 0.25);
}
.lead-main img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}
.lead-overlay {
  position: absolute;
  top: 20px;
  left: 20px;
}
.lead-badge {
  background: linear-gradient(135deg, var(--color-accent, #f59e0b), #fbbf24);
  color: #fff;
  padding: 14px 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 10px 30px rgba(245, 158, 11, 0.4);
}
.lead-num {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
}
.lead-text {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: left;
}
.lead-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.scene-card {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  flex: 1;
  box-shadow: 0 15px 35px -12px rgba(15, 23, 42, 0.2);
  transition: transform 0.4s ease;
}
.scene-card:hover { transform: translateY(-4px); }
.scene-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.scene-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.7);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

/* --- OEM advantages strip --- */
.oem-advantages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 64px;
  padding: 28px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 30px -10px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(15, 23, 42, 0.06);
}
.adv-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 4px 8px;
  border-right: 1px dashed rgba(15, 23, 42, 0.1);
}
.adv-item:last-child { border-right: none; }
.adv-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-accent, #f59e0b), #fbbf24);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.adv-icon svg { width: 22px; height: 22px; }
.adv-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.2;
}
.adv-sub {
  font-size: 0.78rem;
  color: #64748b;
  margin-top: 2px;
}

/* --- Gallery title (series sub-header) --- */
.gallery-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin: 56px 0 32px;
  position: relative;
}
.gallery-title span {
  background: #fff;
  padding: 0 24px;
  position: relative;
  z-index: 1;
  color: #0f172a;
}
.gallery-title::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(15, 23, 42, 0.15), transparent);
}

/* --- Exhibition grid (4 columns) --- */
.exhibition-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}
.exhibit-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 24px -10px rgba(15, 23, 42, 0.1);
  border: 1px solid rgba(15, 23, 42, 0.06);
  transition: all 0.4s ease;
  display: flex;
  flex-direction: column;
}
.exhibit-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px -12px rgba(15, 23, 42, 0.2);
  border-color: var(--color-accent, #f59e0b);
}
.exhibit-card-wide {
  grid-column: span 2;
}
.exhibit-img {
  position: relative;
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  overflow: hidden;
}
.exhibit-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.exhibit-card:hover .exhibit-img img { transform: scale(1.05); }
.exhibit-badge {
  position: absolute;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.exhibit-badge.top {
  top: 12px;
  left: 12px;
  background: var(--color-accent, #f59e0b);
  color: #fff;
}
.exhibit-badge.cert {
  top: 12px;
  right: 12px;
  background: #fff;
  color: #b45309;
  border: 1.5px solid var(--color-accent, #f59e0b);
}
.exhibit-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.exhibit-model {
  font-size: 1.45rem;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.01em;
}
.exhibit-model small {
  font-size: 0.85rem;
  font-weight: 600;
  color: #64748b;
  margin-left: 4px;
}
.exhibit-tagline {
  font-size: 0.82rem;
  color: #475569;
  margin: 4px 0 14px;
  font-weight: 500;
  min-height: 32px;
}
.exhibit-spec {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  border-top: 1px dashed rgba(15, 23, 42, 0.1);
}
.exhibit-spec li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(15, 23, 42, 0.06);
  font-size: 0.78rem;
}
.exhibit-spec li span {
  color: #64748b;
  font-weight: 500;
}
.exhibit-spec li b {
  color: #0f172a;
  font-weight: 700;
  text-align: right;
}
.exhibit-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 11px 16px;
  margin-top: auto;
  background: #0f172a;
  color: #fff;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
}
.exhibit-cta:hover {
  background: var(--color-accent, #f59e0b);
  transform: translateY(-2px);
}
.exhibit-cta svg { width: 16px; height: 16px; }

/* --- Final CTA --- */
.exhibition-cta {
  margin-top: 56px;
  padding: 48px 56px;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.exhibition-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.18), transparent 70%);
  pointer-events: none;
}
.exhibition-cta .cta-content { flex: 1; }
.exhibition-cta h3 {
  font-size: 1.6rem;
  margin: 0 0 8px;
  font-weight: 700;
}
.exhibition-cta p {
  margin: 0;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.78);
}
.exhibition-cta .cta-buttons {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
  position: relative;
}
.exhibition-cta .btn-secondary {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}
.exhibition-cta .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #25d366;
  color: #25d366;
}

@media (max-width: 1024px) {
  .exhibition-lead { grid-template-columns: 1fr; }
  .lead-side { flex-direction: row; }
  .oem-advantages { grid-template-columns: repeat(2, 1fr); }
  .adv-item { border-right: none; }
  .exhibition-grid { grid-template-columns: repeat(2, 1fr); }
  .exhibit-card-wide { grid-column: span 2; }
  .exhibition-cta { flex-direction: column; text-align: center; padding: 36px 28px; }
  .exhibition-cta .cta-buttons { justify-content: center; }
}
@media (max-width: 640px) {
  .lead-side { flex-direction: column; }
  .oem-advantages { grid-template-columns: 1fr; padding: 18px; }
  .exhibition-grid { grid-template-columns: 1fr; }
  .exhibit-card-wide { grid-column: span 1; }
  .exhibit-img { height: 200px; }
  .shusen-exhibition .section-header h2 { font-size: 1.8rem; }
}