@import url('https://fonts.googleapis.com/css2?family=Cormorant:wght@400;500;600;700&family=Montserrat:wght@300;400;500;600;700&display=swap');

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #2d2d2b;
  --gold: #d4af37;
  --gold-hover: #e6c558;
  --white: #ffffff;
  --gray: #cccccc;
  --dark-card: #363634;
  --dark-card-hover: #3d3d3b;
  --border: #3f3f3d;
  --max-width: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Cormorant', Georgia, serif;
  letter-spacing: 0.02em;
}

a { color: var(--gold); text-decoration: none; transition: color .2s; }
a:hover { color: var(--gold-hover); }

img { max-width: 100%; height: auto; display: block; }

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

/* ===== HEADER / NAV ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(45,45,43,.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--gold);
}

.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  color: var(--white);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .5px;
  transition: color .2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold); }

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: .3s;
}

/* Mobile Nav */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,10,10,.98);
    flex-direction: column;
    align-items: center;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .nav-links.open { max-height: 320px; }
  .nav-links li { width: 100%; text-align: center; }
  .nav-links a { display: block; padding: 16px; font-size: 1rem; }
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(.35);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 40px 24px;
  max-width: 800px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--gray);
  margin-bottom: 32px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .5px;
  border: 2px solid var(--gold);
  color: var(--bg);
  background: var(--gold);
  cursor: pointer;
  transition: all .25s;
}

.btn:hover {
  background: transparent;
  color: var(--gold);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
}
.btn-outline:hover {
  background: var(--gold);
  color: var(--bg);
}

.btn-whatsapp {
  background: #25d366;
  border-color: #25d366;
  color: #fff;
  font-size: 1.1rem;
  padding: 16px 40px;
}
.btn-whatsapp:hover {
  background: #1ebe57;
  border-color: #1ebe57;
  color: #fff;
}

/* ===== SECOND BANNER ===== */
.banner-section {
  position: relative;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
}

.banner-section .hero-bg {
  filter: brightness(.25);
}

.banner-section h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: 12px;
  position: relative;
  z-index: 2;
}

.banner-section p {
  color: var(--gray);
  font-size: 1.1rem;
  margin-bottom: 28px;
  position: relative;
  z-index: 2;
}

.banner-section .btn {
  position: relative;
  z-index: 2;
}

/* ===== PRODUCT GRID ===== */
.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 48px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding-bottom: 60px;
}

.product-card {
  background: var(--dark-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform .3s, border-color .3s;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.product-card-body {
  padding: 20px;
}

.product-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.product-card .specs {
  color: var(--gray);
  font-size: .85rem;
}

@media (max-width: 900px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .product-grid { grid-template-columns: 1fr; }
}

/* ===== PAGE HEADER ===== */
.page-header {
  padding: 80px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  padding: 20px 0;
  font-size: .85rem;
  color: var(--gray);
}
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { margin: 0 8px; }

/* ===== PRODUCT DETAIL ===== */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 40px 0 60px;
}

.gallery-main {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  cursor: pointer;
  border: 1px solid var(--border);
}

.gallery-thumbs {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.gallery-thumbs img {
  width: 72px;
  height: 54px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: .6;
  transition: opacity .2s, border-color .2s;
}

.gallery-thumbs img:hover,
.gallery-thumbs img.active {
  opacity: 1;
  border-color: var(--gold);
}

.product-info h1 {
  font-size: 1.8rem;
  margin-bottom: 24px;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 28px;
}

.specs-table th,
.specs-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: .95rem;
}

.specs-table th {
  color: var(--gray);
  font-weight: 500;
  width: 140px;
}

@media (max-width: 768px) {
  .product-detail { grid-template-columns: 1fr; gap: 28px; }
}

/* ===== RELATED PRODUCTS ===== */
.related-section {
  padding: 60px 0;
  border-top: 1px solid var(--border);
}

.related-section h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 36px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .related-grid { grid-template-columns: 1fr; }
}

/* ===== LIGHTBOX ===== */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.92);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lightbox-overlay.active { display: flex; }

.lightbox-inner {
  position: relative;
  max-width: 900px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
}

.lightbox-main {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
}

.lightbox-thumbs {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  justify-content: center;
}

.lightbox-thumbs img {
  width: 64px;
  height: 48px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: .5;
  transition: all .2s;
}

.lightbox-thumbs img:hover,
.lightbox-thumbs img.active {
  opacity: 1;
  border-color: var(--gold);
}

/* ===== OEM / ABOUT / CONTENT SECTIONS ===== */
.content-section {
  padding: 60px 0;
}

.content-section + .content-section {
  border-top: 1px solid var(--border);
}

.content-section h2 {
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--gold);
}

.content-section p {
  color: var(--gray);
  font-size: 1.05rem;
  margin-bottom: 16px;
  max-width: 700px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 40px 0;
}

.step-card {
  background: var(--dark-card);
  border: 1px solid var(--border);
  padding: 32px 20px;
  text-align: center;
}

.step-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
  display: block;
  margin-bottom: 12px;
}

.step-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.step-card p { color: var(--gray); font-size: .9rem; }

@media (max-width: 768px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .steps-grid { grid-template-columns: 1fr; }
}

.benefits-list {
  list-style: none;
  margin: 24px 0;
}

.benefits-list li {
  padding: 10px 0;
  padding-left: 28px;
  position: relative;
  color: var(--gray);
  font-size: 1.05rem;
}

.benefits-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
  padding: 40px 0;
}

.contact-item h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--gold);
}

.contact-item p { color: var(--gray); }

@media (max-width: 600px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ===== PAYMENT ===== */
.payment-methods {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 0;
}

.payment-card {
  background: var(--dark-card);
  border: 1px solid var(--border);
  padding: 32px 20px;
  text-align: center;
}

.payment-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.payment-card h3 { font-size: 1rem; margin-bottom: 4px; }
.payment-card p { color: var(--gray); font-size: .85rem; }

@media (max-width: 768px) {
  .payment-methods { grid-template-columns: repeat(2, 1fr); }
}

/* ===== FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--white);
  font-size: 1.2rem;
  transition: all .2s;
}

.footer-social a:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.footer-links {
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--gray);
  margin: 0 12px;
  font-size: .85rem;
}

.footer-links a:hover { color: var(--gold); }

.footer-copy {
  color: #555;
  font-size: .8rem;
}

/* ===== PRIVACY / LEGAL ===== */
.legal-content {
  padding: 40px 0 80px;
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin: 32px 0 12px;
  color: var(--white);
}

.legal-content p,
.legal-content li {
  color: var(--gray);
  font-size: .95rem;
  margin-bottom: 12px;
}

.legal-content ul { padding-left: 24px; margin-bottom: 16px; }

/* ===== UTILS ===== */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-40 { margin-bottom: 40px; }
.pt-40 { padding-top: 40px; }

/* ===== Additional Page Styles ===== */
.page-hero {
  background: linear-gradient(135deg, #111 0%, #1a1a1a 100%);
  padding: 80px 24px;
  text-align: center;
  border-bottom: 1px solid #d4af3730;
}
.page-hero h1 { font-size: clamp(2rem, 5vw, 3rem); color: #d4af37; margin-bottom: 12px; }
.page-hero p { color: #999; font-size: 1.1rem; }

.content-section { padding: 80px 24px; max-width: 1100px; margin: 0 auto; }

/* About */
.about-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.about-block h2 { color: #d4af37; font-size: 1.3rem; margin-bottom: 12px; }
.about-block p { color: #ccc; line-height: 1.7; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.contact-card { background: #111; border: 1px solid #222; border-radius: 12px; padding: 36px 28px; text-align: center; }
.contact-card.primary { border-color: #d4af37; }
.contact-icon { font-size: 2.5rem; margin-bottom: 16px; color: #d4af37; }
.contact-card h2 { color: #fff; margin-bottom: 10px; }
.contact-card p { color: #999; margin-bottom: 20px; line-height: 1.6; }
.btn-outline { background: transparent; border: 2px solid #d4af37; color: #d4af37; }
.btn-outline:hover { background: #d4af37; color: #000; }

/* Payment */
.payment-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; margin-bottom: 48px; }
.payment-card { background: #111; border: 1px solid #222; border-radius: 12px; padding: 32px 24px; position: relative; }
.payment-icon { font-size: 2rem; margin-bottom: 14px; }
.payment-card h2 { color: #d4af37; font-size: 1.2rem; margin-bottom: 10px; }
.payment-card p { color: #999; line-height: 1.6; font-size: 0.95rem; }
.payment-badge { display: inline-block; background: #d4af3720; color: #d4af37; border: 1px solid #d4af3740; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; margin-top: 12px; }
.payment-note { background: #111; border: 1px solid #222; border-radius: 12px; padding: 36px; }
.payment-note h3 { color: #d4af37; margin-bottom: 16px; }
.payment-note ul { list-style: none; padding: 0; }
.payment-note li { color: #ccc; padding: 8px 0; border-bottom: 1px solid #1a1a1a; }
.payment-note li::before { content: "✓ "; color: #d4af37; }

/* Legal */
.legal-text h2 { color: #d4af37; font-size: 1.2rem; margin: 32px 0 12px; }
.legal-text p, .legal-text li { color: #ccc; line-height: 1.8; }
.legal-text a { color: #d4af37; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #222; padding: 4px 0; }
.faq-item summary { color: #d4af37; padding: 16px 0; cursor: pointer; font-size: 1rem; font-weight: 600; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: "+ "; color: #d4af37; }
.faq-item[open] summary::before { content: "− "; }
.faq-item p { color: #ccc; padding: 0 0 16px 16px; line-height: 1.7; margin: 0; }

/* Nav Quote Button */
.btn-nav-quote { padding: 8px 20px; font-size: 0.85rem; white-space: nowrap; margin-left: 16px; }
@media (max-width: 768px) { .btn-nav-quote { display: none; } }

/* Section title large centered */
.section-title-lg { text-align: center; font-size: clamp(1.6rem, 4vw, 2.4rem); color: #d4af37; margin-bottom: 48px; }

/* Home products grid - 4 col */
.products-home-section { padding: 80px 24px; }
.product-grid-home { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) { .product-grid-home { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .product-grid-home { grid-template-columns: 1fr 1fr; gap: 12px; } }

/* OEM Gallery */
.oem-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.oem-gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 8px; }
@media (max-width: 600px) { .oem-gallery { grid-template-columns: 1fr; } }

/* Contact Layout */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
@media (max-width: 768px) { .contact-layout { grid-template-columns: 1fr; } }
.contact-form-wrap h2, .contact-direct h2 { color: #d4af37; margin-bottom: 24px; font-size: 1.4rem; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: #999; font-size: 0.85rem; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.05em; }
.form-group input, .form-group textarea { width: 100%; background: #111; border: 1px solid #333; border-radius: 8px; padding: 14px 16px; color: #fff; font-size: 1rem; box-sizing: border-box; transition: border-color 0.2s; }
.form-group input:focus, .form-group textarea:focus { border-color: #d4af37; outline: none; }
.form-group textarea { resize: vertical; }
.contact-channel { display: flex; align-items: center; gap: 16px; padding: 20px; border-radius: 10px; margin-bottom: 16px; text-decoration: none; border: 1px solid #222; transition: border-color 0.2s; }
.contact-channel:hover { border-color: #d4af37; }
.contact-channel.whatsapp { color: #25d366; }
.contact-channel.email { color: #d4af37; }
.contact-channel.wechat { color: #07c160; cursor: default; }
.contact-channel strong { display: block; color: #fff; margin-bottom: 4px; }
.contact-channel span { color: #999; font-size: 0.9rem; }

/* Home + Extensions listing grid - 4 col, 2 rows */
.home-products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .home-products-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .home-products-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }

/* ===== HERO CAROUSEL ===== */
.hero-carousel {
  position: relative;
  height: 90vh;
  min-height: 520px;
  overflow: hidden;
}
.carousel-track { position: relative; width: 100%; height: 100%; display: block; }
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
}
.carousel-slide.active { opacity: 1; z-index: 1; pointer-events: auto; }
.carousel-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.38);
}
.carousel-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 800px;
}
.carousel-content h1 {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.2;
}
.carousel-content p {
  color: #ccc;
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin-bottom: 32px;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(212,175,55,0.4);
  color: #d4af37;
  width: 48px; height: 48px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s;
}
.carousel-btn:hover { background: rgba(212,175,55,0.2); }
.carousel-btn.prev { left: 20px; }
.carousel-btn.next { right: 20px; }
.carousel-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: background 0.3s;
}
.dot.active { background: #d4af37; }


@media (max-width: 1024px) {
  .payment-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .payment-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}