/* ===== Apple-Style Minimalist Design ===== */
/* Color: #FFFFFF bg, #1D1D1F text, #F5F5F7 dividers */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', 'Segoe UI', Roboto, sans-serif;
  background: #FFFFFF;
  color: #1D1D1F;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  transition: background 0.3s;
}
nav {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-size: 20px; font-weight: 700; color: #1D1D1F;
  text-decoration: none; letter-spacing: -0.5px;
}
.nav-links { display: flex; gap: 40px; list-style: none; }
.nav-links a {
  font-size: 14px; color: #424245; text-decoration: none;
  transition: color 0.3s; letter-spacing: -0.01em;
}
.nav-links a:hover, .nav-links a.active { color: #1D1D1F; }

.mobile-menu-btn {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; flex-direction: column; justify-content: center; gap: 5px;
}
.mobile-menu-btn span { display: block; width: 20px; height: 2px; background: #1D1D1F; transition: 0.3s; }

/* ===== Video Container ===== */
.video-container {
  max-width: 900px;
  margin: 0 auto;
  background: #000;
  border-radius: 0;
  overflow: hidden;
  position: relative;
}
.video-container video {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Hero ===== */
.hero {
  padding: 180px 0 100px; text-align: center;
  background: #FFFFFF;
}
.hero h1 {
  font-size: 64px; font-weight: 700; color: #1D1D1F;
  letter-spacing: -1.5px; line-height: 1.05; margin-bottom: 20px;
}
.hero p {
  font-size: 24px; font-weight: 400; color: #86868B;
  letter-spacing: -0.02em; max-width: 600px; margin: 0 auto;
}

/* ===== Section ===== */
.section-title {
  font-size: 40px; font-weight: 700; color: #1D1D1F;
  letter-spacing: -1px; text-align: center; margin-bottom: 16px;
}
.section-subtitle {
  font-size: 18px; color: #86868B; text-align: center; margin-bottom: 64px;
}

/* ===== Product Cards (Homepage) ===== */
.featured-products { padding: 100px 0; background: #F5F5F7; }
.products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.product-card {
  background: #FFFFFF; border-radius: 20px; overflow: hidden;
  text-decoration: none; color: inherit; display: block;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s;
}
.product-card:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 60px rgba(0,0,0,0.1);
}
.product-card img {
  width: 100%; height: 280px; object-fit: cover; background: #F5F5F7;
}
.product-card-body { padding: 28px; }
.product-card h3 { font-size: 20px; font-weight: 600; color: #1D1D1F; margin-bottom: 8px; }
.product-card p { font-size: 14px; color: #86868B; line-height: 1.5; }

/* ===== Products Listing ===== */
.products-page { padding: 160px 0 100px; }
.products-grid-full {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.product-card-sm {
  background: #F5F5F7; border-radius: 16px; overflow: hidden;
  text-decoration: none; color: inherit; display: block;
  transition: transform 0.3s;
}
.product-card-sm:hover { transform: translateY(-4px); }
.product-card-sm img {
  width: 100%; height: 200px; object-fit: cover; background: #E8E8ED;
}
.product-card-sm-body { padding: 16px; }
.product-card-sm h4 { font-size: 15px; font-weight: 600; color: #1D1D1F; }
.product-card-sm span { font-size: 12px; color: #86868B; }

/* ===== Product Detail ===== */
.product-detail { padding: 160px 0 100px; }
.product-hero { text-align: center; margin-bottom: 80px; }
.product-hero h1 { font-size: 48px; font-weight: 700; color: #1D1D1F; letter-spacing: -1px; margin-bottom: 12px; }
.product-hero p { font-size: 18px; color: #86868B; }
.product-video { margin: 0 auto 80px; max-width: 900px; border-radius: 20px; overflow: hidden; background: #000; }
.product-video video { width: 100%; display: block; }
.product-images { margin-bottom: 80px; }
.product-images h2 { font-size: 32px; font-weight: 600; text-align: center; margin-bottom: 40px; }
.image-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.image-grid img {
  width: 100%; border-radius: 12px; background: #F5F5F7; cursor: pointer;
  transition: transform 0.3s;
}
.image-grid img:hover { transform: scale(1.02); }

/* Specs Table */
.specs { margin-bottom: 80px; }
.specs h2 { font-size: 32px; font-weight: 600; text-align: center; margin-bottom: 40px; }
.specs-table { max-width: 700px; margin: 0 auto; }
.spec-row {
  display: flex; justify-content: space-between; padding: 16px 0;
  border-bottom: 1px solid #D2D2D7;
}
.spec-row:last-child { border-bottom: none; }
.spec-label { font-size: 15px; color: #86868B; }
.spec-value { font-size: 15px; font-weight: 500; color: #1D1D1F; }

/* Back Button */
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; color: #0066CC; text-decoration: none;
  margin-bottom: 32px; transition: opacity 0.3s;
}
.back-link:hover { opacity: 0.7; }

/* ===== About Page ===== */
.about-hero {
  padding: 180px 0 100px; text-align: center; background: #F5F5F7;
}
.about-hero h1 { font-size: 56px; font-weight: 700; color: #1D1D1F; letter-spacing: -1.5px; margin-bottom: 16px; }
.about-hero p { font-size: 22px; color: #86868B; }

.who-we-are { padding: 100px 0; }
.who-we-are .lead {
  font-size: 20px; color: #424245; line-height: 1.8; text-align: center;
  max-width: 800px; margin: 0 auto;
}

/* Services */
.core-services { padding: 100px 0; background: #F5F5F7; }
.services-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.service-card {
  background: #FFFFFF; border-radius: 20px; padding: 40px 32px; text-align: center;
}
.service-card h3 { font-size: 20px; font-weight: 600; color: #1D1D1F; margin-bottom: 12px; }
.service-card p { font-size: 14px; color: #86868B; line-height: 1.6; }

/* Sourcing */
.global-sourcing { padding: 100px 0; }
.sourcing-steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px;
}
.step { text-align: center; }
.step-number {
  width: 56px; height: 56px; border-radius: 50%; background: #1D1D1F;
  color: #FFFFFF; font-size: 20px; font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.step h4 { font-size: 17px; font-weight: 600; color: #1D1D1F; margin-bottom: 8px; }
.step p { font-size: 14px; color: #86868B; line-height: 1.5; }

/* Timeline */
.timeline { padding: 100px 0; background: #F5F5F7; }
.timeline-list { max-width: 700px; margin: 0 auto; }
.timeline-item {
  display: flex; gap: 32px; padding: 24px 0;
  border-bottom: 1px solid #D2D2D7;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-year { font-size: 20px; font-weight: 600; color: #1D1D1F; min-width: 80px; }
.timeline-event { font-size: 15px; color: #424245; line-height: 1.6; }

/* Advantages */
.why-choose { padding: 100px 0; }
.advantages-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.advantage {
  background: #F5F5F7; border-radius: 20px; padding: 40px;
}
.advantage h4 { font-size: 20px; font-weight: 600; color: #1D1D1F; margin-bottom: 12px; }
.advantage p { font-size: 15px; color: #424245; line-height: 1.6; }

/* CTA */
.cta {
  padding: 100px 0; text-align: center; background: #1D1D1F; color: #FFFFFF;
}
.cta h2 { font-size: 40px; font-weight: 700; margin-bottom: 32px; }
.btn {
  display: inline-block; padding: 16px 40px; background: #FFFFFF; color: #1D1D1F;
  text-decoration: none; border-radius: 980px; font-size: 17px; font-weight: 500;
  transition: opacity 0.3s;
}
.btn:hover { opacity: 0.85; }

/* ===== Footer ===== */
footer {
  padding: 40px 0; background: #F5F5F7;
  border-top: 1px solid #D2D2D7;
}
footer .container {
  display: flex; justify-content: space-between; align-items: center;
}
footer p { font-size: 13px; color: #86868B; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 13px; color: #424245; text-decoration: none; }
.footer-links a:hover { color: #1D1D1F; }

/* ===== Fade-in Animation ===== */
.fade-in {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid-full { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .sourcing-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(255,255,255,0.98); flex-direction: column;
    padding: 20px 24px; gap: 20px;
    border-bottom: 1px solid rgba(0,0,0,0.08);
  }
  .nav-links.open { display: flex; }
  
  .hero h1 { font-size: 40px; }
  .hero p { font-size: 18px; }
  .hero { padding: 140px 0 60px; }
  
  .products-grid { grid-template-columns: 1fr; }
  .products-grid-full { grid-template-columns: repeat(2, 1fr); }
  .product-card img { height: 200px; }
  
  .services-grid { grid-template-columns: 1fr; }
  .sourcing-steps { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  
  .about-hero h1 { font-size: 36px; }
  .section-title { font-size: 28px; }
  
  .image-grid { grid-template-columns: 1fr; }
  
  footer .container { flex-direction: column; gap: 16px; text-align: center; }
}