/* ===== Global Reset & Variables ===== */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0d2440;
  --accent: #c8a96e;
  --accent-light: #dfc08a;
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-warm: #fdfbf7;
  --bg-dark: #0d1b2a;
  --text-dark: #1a1a2e;
  --text-body: #374151;
  --text-light: #6b7280;
  --text-white: #ffffff;
  --border: #e5e7eb;
  --border-light: #f0f0f0;
  --shadow-xs: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --font-heading: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 70px;
  --max-width: 1240px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-light);
}

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

ul, ol { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: 0 2px 8px rgba(26,58,92,0.25);
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(26,58,92,0.35);
  color: var(--text-white);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--text-dark);
  box-shadow: 0 2px 12px rgba(200,169,110,0.35);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(200,169,110,0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--text-white);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--bg-white);
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.2);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1rem;
  border-radius: var(--radius);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: all var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 1px 20px rgba(0,0,0,0.08);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--primary);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.95rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-menu a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 0;
  letter-spacing: 0.01em;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2.5px;
  background: var(--primary);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-shrink: 0;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px 12px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: 0.82rem;
  cursor: pointer;
  background: transparent;
  transition: var(--transition);
}

.lang-switch:hover {
  border-color: var(--primary);
}

.lang-switch .lang-option {
  padding: 3px 7px;
  cursor: pointer;
  border-radius: 12px;
  transition: var(--transition);
  font-weight: 500;
  color: var(--text-light);
}

.lang-switch .lang-option.active {
  background: var(--primary);
  color: white;
}

.lang-sep {
  color: var(--border);
  font-size: 0.75rem;
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 1px;
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--bg-white);
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 0.95rem;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-light);
  font-weight: 500;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  min-height: 720px;
  background-color: var(--bg-dark);
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  padding-bottom: 100px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(13,27,42,0.92) 0%,
    rgba(13,27,42,0.78) 40%,
    rgba(26,58,92,0.55) 70%,
    rgba(26,58,92,0.40) 100%
  );
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(to top, var(--bg-white), transparent);
  z-index: 1;
  pointer-events: none;
}

.hero-overlay {
  /* kept for compatibility, main gradient is on ::before */
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-text {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: rgba(200,169,110,0.15);
  border: 1px solid rgba(200,169,110,0.35);
  border-radius: 24px;
  font-size: 0.82rem;
  color: var(--accent-light);
  margin-bottom: 28px;
  font-weight: 600;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--text-white);
  line-height: 1.12;
  margin-bottom: 24px;
  letter-spacing: -0.04em;
}

.hero-desc {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-hero-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
  backdrop-filter: blur(4px);
}

.btn-hero-outline:hover {
  background: rgba(255,255,255,0.12);
  color: white;
  border-color: rgba(255,255,255,0.85);
  transform: translateY(-2px);
}

/* Hero Image (right side product showcase) */
.hero-image {
  display: none; /* Hidden on desktop since we use bg image now */
}

/* Sub-banner cards — floating cards overlapping hero bottom */
.hero-cards {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: -60px;
  margin-bottom: 20px;
}

.hero-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.hero-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.hero-card:hover::before {
  opacity: 1;
}

.hero-card-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, #eef2ff, #e0e7ff);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.hero-card-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.5;
}

.hero-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.hero-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
}

.hero-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition);
}

.hero-card:hover .card-link {
  gap: 10px;
}

/* ===== Product Categories Section ===== */
.products-section {
  padding: 100px 0;
  background: var(--bg-white);
}

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

.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  text-align: left;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.product-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px transparent;
  transition: box-shadow var(--transition);
}

.product-card:hover::after {
  box-shadow: inset 0 0 0 1px var(--primary-light);
}

.product-card-image {
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
  background: var(--bg-light);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-image img {
  transform: scale(1.07);
}

.product-card-body {
  padding: 20px 22px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card-icon svg {
  width: 32px;
  height: 32px;
  stroke: white;
  fill: none;
  stroke-width: 1.5;
}

.product-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.product-card .card-subtitle {
  font-size: 0.84rem;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.55;
  flex: 1;
}

.product-card .card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--transition);
}

.product-card:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ===== About Section ===== */
.about-section {
  padding: 100px 0;
  background: var(--bg-warm);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-item {
  padding: 32px 24px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.stat-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 6px;
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 500;
}

.about-text h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 20px;
}

/* ===== Solutions Section ===== */
.solutions-section {
  padding: 100px 0;
  background: var(--bg-white);
}

.solution-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 800px;
  margin: 0 auto;
}

.solution-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 30px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid var(--border);
}

.solution-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}

.solution-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.15;
  min-width: 56px;
  letter-spacing: -0.02em;
}

.solution-content {
  flex: 1;
}

.solution-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.solution-content p {
  font-size: 0.88rem;
  color: var(--text-light);
}

.solution-arrow {
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 300;
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--transition);
}

.solution-item:hover .solution-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ===== Why Choose Us ===== */
.why-section {
  padding: 100px 0;
  background: var(--bg-warm);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-card {
  padding: 44px 32px;
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-light);
  position: relative;
}

.why-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.why-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(26,58,92,0.25);
}

.why-icon svg {
  width: 34px;
  height: 34px;
  stroke: white;
  fill: none;
  stroke-width: 1.5;
}

.why-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.why-card p {
  font-size: 0.91rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== Process Section ===== */
.process-section {
  padding: 100px 0;
  background: var(--bg-white);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: 0 6px 20px rgba(26,58,92,0.25);
  letter-spacing: -0.02em;
}

.process-step h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.83rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(200,169,110,0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 18px;
  letter-spacing: -0.03em;
  position: relative;
}

.cta-section p {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
  position: relative;
}

/* ===== Category Page ===== */
.category-hero {
  position: relative;
  min-height: 380px;
  background: linear-gradient(135deg, var(--bg-dark), var(--primary));
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  padding-bottom: 60px;
}

.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(13,24,40,0.85) 0%,
    rgba(26,58,92,0.6) 50%,
    rgba(13,24,40,0.7) 100%
  );
  z-index: 1;
}

.category-hero-content {
  text-align: center;
  width: 100%;
  position: relative;
  z-index: 2;
}

.category-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.category-hero p {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.78);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

.category-products {
  padding: 70px 0;
}

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

.category-product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.category-product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.category-product-card .card-image {
  aspect-ratio: 4/3;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.category-product-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.category-product-card:hover .card-image img {
  transform: scale(1.05);
}

.category-product-card .card-body {
  padding: 22px;
}

.category-product-card h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.category-product-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
}

.category-product-card .card-price {
  margin-top: 14px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--primary);
}

/* ===== Product Detail Page ===== */
.product-detail {
  padding-top: var(--nav-height);
}

.product-detail-hero {
  background: linear-gradient(135deg, var(--bg-dark), var(--primary-dark));
  padding: 44px 0;
}

.product-detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  padding: 50px 0;
}

.product-detail-image {
  aspect-ratio: 4/3;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--border);
}

.product-detail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.product-detail-info {
  display: flex;
  flex-direction: column;
}

.product-detail-info h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.product-detail-info .product-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.product-detail-info .product-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 36px;
}

/* Purchase Block */
.purchase-block {
  background: var(--bg-warm);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 32px;
  border: 1px solid var(--border-light);
}

.purchase-price {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.purchase-note {
  font-size: 0.86rem;
  color: var(--text-light);
  margin-bottom: 22px;
}

.purchase-buttons {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
}

.purchase-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.purchase-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--text-body);
  font-weight: 500;
}

.purchase-feature svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary);
  flex-shrink: 0;
}

/* Parameter Table */
.param-section {
  padding: 44px 0 80px;
}

.param-section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 28px;
}

.param-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.param-table th {
  background: var(--primary);
  color: white;
  padding: 15px 22px;
  font-weight: 600;
  font-size: 0.88rem;
  text-align: left;
  letter-spacing: 0.02em;
}

.param-table td {
  padding: 13px 22px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-body);
}

.param-table tr:last-child td {
  border-bottom: none;
}

.param-table td[contenteditable="true"] {
  background: #fefefe;
  outline: none;
  cursor: text;
  transition: all var(--transition);
}

.param-table td[contenteditable="true"]:focus {
  background: #eef4ff;
  box-shadow: inset 0 0 0 2px var(--primary);
}

.param-table td[contenteditable="true"]:hover {
  background: #f8fbff;
}

.param-add-btn {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== Contact Page ===== */
.contact-page {
  padding-top: var(--nav-height);
}

.contact-hero {
  background: linear-gradient(135deg, var(--bg-dark), var(--primary));
  padding: 64px 0;
  text-align: center;
}

.contact-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.contact-hero p {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.78);
}

.contact-form-section {
  padding: 64px 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 48px;
}

.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
}

.contact-form h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  font-family: var(--font-body);
  color: var(--text-body);
  background: var(--bg-white);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.08);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-card {
  background: var(--bg-warm);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-light);
}

.contact-info-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.contact-info-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.7;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.contact-info-item svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary);
  flex-shrink: 0;
}

.contact-info-item span {
  font-size: 0.9rem;
  color: var(--text-body);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 22px;
  color: var(--accent);
  letter-spacing: 0.03em;
}

.footer-about .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.45rem;
  margin-bottom: 18px;
}

.footer-about .footer-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 0.95rem;
}

.footer-about p {
  font-size: 0.89rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.75;
}

.footer-links a {
  display: block;
  padding: 7px 0;
  font-size: 0.87rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent);
  margin-top: 2px;
  flex-shrink: 0;
}

.footer-contact-item span {
  font-size: 0.87rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.55;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

.footer-bottom-links {
  display: flex;
  gap: 28px;
}

.footer-bottom-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

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

/* ===== Responsive: Tablet (≤1024px) ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 24px;
  }

  /* Hero */
  .hero {
    min-height: 580px;
    padding-bottom: 100px;
  }
  .hero-title { font-size: 2.4rem; }
  .hero-desc { font-size: 1rem; max-width: 480px; }

  /* Hero Cards */
  .hero-cards {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -48px;
    gap: 18px;
  }
  .hero-cards > *:last-child {
    grid-column: span 2;
    max-width: 50%;
    justify-self: center;
  }
  .hero-card { padding: 24px 20px; }
  .hero-card-icon { width: 46px; height: 46px; margin-bottom: 16px; }
  .hero-card h3 { font-size: 0.95rem; }
  .hero-card p { font-size: 0.83rem; }

  /* Products Grid */
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .product-card-body { padding: 16px 18px 22px; }
  .product-card h3 { font-size: 0.95rem; }

  /* About */
  .about-grid { gap: 48px; }
  .stat-item { padding: 24px 18px; }
  .stat-number { font-size: 2.2rem; }

  /* Category */
  .category-product-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .category-hero h1 { font-size: 2.2rem; }

  /* Product Detail */
  .product-detail-layout { grid-template-columns: 1fr; gap: 32px; }

  /* Contact */
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }

  /* Footer */
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }

  /* Process */
  .process-steps { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .step-number { width: 52px; height: 52px; font-size: 1rem; }
  .process-step h4 { font-size: 0.88rem; }
  .process-step p { font-size: 0.8rem; }

  /* Why Choose */
  .why-grid { gap: 24px; }
  .why-card { padding: 32px 24px; }

  /* Section Titles */
  .section-title { font-size: 1.9rem; }
}

/* ===== Responsive: Mobile Landscape / Small Tablet (≤768px) ===== */
@media (max-width: 768px) {
/* Nav: hide desktop menu and CTA button on mobile, keep lang switch */
@media (max-width: 768px) {
  .nav-menu { display: none !important; }
  /* Hide only the inquiry btn, keep lang switch visible */
  .nav-actions > .btn { display: none !important; }
  .nav-hamburger { display: flex; }
  .nav-actions { gap: 10px; }
  .lang-switch { padding: 4px 10px; font-size: 0.78rem; }
  .mobile-menu a { padding: 13px 0; font-size: 0.92rem; }

  .container { padding: 0 18px; }

  /* Hero */
  .hero {
    min-height: 520px;
    padding-bottom: 120px;
  }
  .hero-badge {
    font-size: 0.75rem;
    padding: 5px 14px;
    margin-bottom: 20px;
  }
  .hero-title { font-size: 1.95rem; line-height: 1.15; margin-bottom: 18px; }
  .hero-desc { font-size: 0.92rem; line-height: 1.7; margin-bottom: 28px; }
  .hero-buttons { flex-direction: column; gap: 12px; }
  .hero-buttons .btn { width: 100%; justify-content: center; }

  /* Hero Cards */
  .hero-cards {
    grid-template-columns: 1fr;
    margin-top: 0;
    gap: 14px;
  }
  .hero-cards > *:last-child {
    grid-column: span 1;
    max-width: 100%;
  }
  .hero-card { padding: 24px 22px; }
  .hero-card:hover { transform: translateY(-3px); }

  /* Products Grid */
  .products-section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }
  .section-title { font-size: 1.65rem; }
  .section-subtitle { font-size: 0.92rem; margin-bottom: 36px; }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .product-card-body { padding: 14px 16px 18px; }
  .product-card h3 { font-size: 0.88rem; margin-bottom: 6px; }
  .product-card .card-subtitle { font-size: 0.78rem; margin-bottom: 12px; }
  .product-card:hover { transform: translateY(-4px); }
  .product-card .card-arrow { opacity: 1; transform: translateX(0); font-size: 0.78rem; }

  /* About */
  .about-section { padding: 60px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-item { padding: 22px 14px; }
  .stat-number { font-size: 1.85rem; }
  .stat-label { font-size: 0.82rem; }
  .about-text h2 { font-size: 1.65rem; margin-bottom: 16px; }
  .about-text p { font-size: 0.92rem; margin-bottom: 16px; }

  /* Solutions */
  .solutions-section { padding: 60px 0; }
  .solution-list { gap: 10px; }
  .solution-item { padding: 16px 18px; gap: 16px; }
  .solution-number { font-size: 1.6rem; min-width: 44px; }
  .solution-content h3 { font-size: 0.92rem; }
  .solution-content p { font-size: 0.82rem; }

  /* Why Choose */
  .why-section { padding: 60px 0; }
  .why-grid { grid-template-columns: 1fr; gap: 16px; }
  .why-card { padding: 28px 24px; }
  .why-card:hover { transform: translateY(-4px); }
  .why-icon { width: 56px; height: 56px; margin-bottom: 18px; }
  .why-icon svg { width: 28px; height: 28px; }
  .why-card h3 { font-size: 1.08rem; }
  .why-card p { font-size: 0.87rem; }

  /* Process */
  .process-section { padding: 60px 0; }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 12px;
  }
  .step-number { width: 48px; height: 48px; font-size: 0.95rem; }
  .process-step h4 { font-size: 0.85rem; margin-bottom: 4px; }
  .process-step p { font-size: 0.77rem; }

  /* CTA */
  .cta-section { padding: 60px 40px; }
  .cta-section h2 { font-size: 1.75rem; margin-bottom: 14px; }
  .cta-section p { font-size: 0.92rem; margin-bottom: 28px; }

  /* Category Page */
  .category-hero { min-height: 300px; padding-bottom: 44px; }
  .category-hero h1 { font-size: 1.85rem; }
  .category-hero p { font-size: 0.92rem; }
  .category-products { padding: 50px 0; }
  .category-product-grid { grid-template-columns: 1fr; gap: 16px; }
  .category-product-card .card-body { padding: 16px; }
  .category-product-card h3 { font-size: 0.95rem; }

  /* Product Detail */
  .product-detail-hero { padding: 30px 0; }
  .product-detail-layout { padding: 32px 0; gap: 24px; }
  .product-detail-info h1 { font-size: 1.55rem; }
  .product-detail-info .product-subtitle { font-size: 0.9rem; margin-bottom: 20px; }
  .product-detail-info .product-desc { font-size: 0.88rem; margin-bottom: 24px; }
  .purchase-block { padding: 22px; margin-bottom: 24px; }
  .purchase-price { font-size: 1.55rem; }
  .purchase-note { font-size: 0.82rem; }
  .purchase-buttons { flex-direction: column; gap: 10px; }
  .purchase-buttons .btn { width: 100%; justify-content: center; }
  .purchase-features { gap: 10px; }
  .purchase-feature { font-size: 0.83rem; gap: 10px; }

  /* Param Table */
  .param-section { padding: 32px 0 60px; }
  .param-section h2 { font-size: 1.3rem; margin-bottom: 20px; }
  .param-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
  }
  .param-table { min-width: 500px; }
  .param-table th { padding: 12px 16px; font-size: 0.82rem; }
  .param-table td { padding: 11px 16px; font-size: 0.84rem; }
  .param-add-btn .btn { width: 100%; }

  /* Contact Page */
  .contact-page { padding-top: var(--nav-height); }
  .contact-hero { padding: 48px 0; }
  .contact-hero h1 { font-size: 1.75rem; }
  .contact-form-section { padding: 48px 0; }
  .contact-form { padding: 28px 20px; }
  .contact-form h2 { font-size: 1.25rem; margin-bottom: 24px; }
  .form-group label { font-size: 0.84rem; }
  .form-group input,
  .form-group textarea,
  .form-group select { padding: 11px 14px; font-size: 0.9rem; }
  .form-row { grid-template-columns: 1fr; gap: 12px; }
  .contact-info-card { padding: 24px; }
  .contact-info-card h3 { font-size: 0.98rem; }
  .contact-info-item { font-size: 0.86rem; }

  /* Footer */
  .footer { padding: 48px 0 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 36px; }
  .footer-about p { font-size: 0.84rem; }
  .footer-col h4 { font-size: 0.9rem; margin-bottom: 16px; }
  .footer-links a { font-size: 0.83rem; padding: 6px 0; }
  .footer-contact-item span { font-size: 0.83rem; }
  .footer-bottom { padding: 20px 0; flex-direction: column; gap: 12px; text-align: center; }
  .footer-bottom-links { gap: 20px; justify-content: center; }
  .footer-bottom p { font-size: 0.78rem; }
  .footer-bottom-links a { font-size: 0.78rem; }

  /* Buttons mobile sizing */
  .btn { padding: 11px 24px; font-size: 0.86rem; }
  .btn-lg { padding: 13px 28px; font-size: 0.93rem; }
  .btn-sm { padding: 7px 16px; font-size: 0.8rem; }

  /* Toast mobile */
  .toast {
    left: 16px; right: 16px;
    bottom: 20px; max-width: none;
    font-size: 0.86rem; padding: 14px 20px;
  }
}

/* ===== Responsive: Small Mobile (≤480px) ===== */
@media (max-width: 480px) {
  .container { padding: 0 15px; }

  .hero { min-height: 480px; padding-bottom: 110px; }
  .hero-title { font-size: 1.7rem; }
  .hero-desc { font-size: 0.86rem; }

  .product-grid { gap: 10px; }
  .product-card-image { aspect-ratio: 3/2; }
  .product-card-body { padding: 12px 14px 16px; }
  .product-card h3 { font-size: 0.83rem; }
  .product-card .card-subtitle { font-size: 0.74rem; }

  .about-stats { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-item { padding: 18px 12px; }
  .stat-number { font-size: 1.6rem; }

  .process-steps { grid-template-columns: 1fr 1fr; gap: 12px 8px; }

  .category-hero { min-height: 260px; }

  .purchase-price { font-size: 1.4rem; }

  .contact-form { padding: 22px 16px; }

  .footer { padding: 36px 0 0; }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== Utility ===== */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--primary);
  color: white;
  padding: 16px 28px;
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: fadeInUp 0.3s ease;
  max-width: 380px;
  letter-spacing: 0.01em;
}

.toast.success {
  background: linear-gradient(135deg, #10b981, #059669);
}

.toast.error {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}