/* =========================================================
   Ascenda Smart Technologies — Welding Equipment B2B Website
   Design System: Deep industrial blue + orange accent
   ========================================================= */

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- CSS Variables (Design Tokens) ---------- */
:root {
  /* Core Palette */
  --color-primary: #0A4D8C;        /* Deep industrial blue */
  --color-primary-dark: #062C4F;   /* Darker blue for dark sections */
  --color-primary-light: #1565C0;  /* Lighter blue for accents */
  --color-accent: #FF6B2B;         /* Welding spark orange */
  --color-accent-dark: #E55A1A;
  --color-accent-light: #FF8A55;

  /* Neutral palette */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7FA;
  --color-bg-dark: #0A1A2F;        /* Very dark blue for dark sections */
  --color-bg-deep: #06121F;
  --color-surface: #FFFFFF;
  --color-surface-alt: #FAFBFD;
  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;

  /* Text colors */
  --color-text: #1A2740;
  --color-text-secondary: #4A5568;
  --color-text-muted: #718096;
  --color-text-light: #CBD5E0;
  --color-text-on-dark: #E2E8F0;
  --color-text-dark: #FFFFFF;

  /* Typography */
  --font-display: 'Space Grotesk', 'DM Sans', sans-serif;
  --font-body: 'DM Sans', -apple-system, sans-serif;

  /* Spacing */
  --container-max: 1200px;
  --section-padding-y: 100px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadow */
  --shadow-sm: 0 1px 3px rgba(10, 26, 47, 0.08);
  --shadow-md: 0 4px 16px rgba(10, 26, 47, 0.08);
  --shadow-lg: 0 12px 40px rgba(10, 26, 47, 0.12);
  --shadow-xl: 0 20px 60px rgba(10, 26, 47, 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ---------- Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding-y) 0;
}

/* ---------- Typography ---------- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-eyebrow-light {
  color: var(--color-accent-light);
}

.section-title {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.section-title-light {
  color: #FFFFFF;
}

.section-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.section-subtitle-light {
  color: var(--color-text-on-dark);
  opacity: 0.8;
}

.section-header-light {
  color: #FFFFFF;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: 0.01em;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 107, 43, 0.35);
}

.btn-outline-light {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border-light);
}

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

.logo-link {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 72px;
  width: auto;
}

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

.nav-link {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.nav-cta {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all var(--transition-base);
}

.nav-link.nav-cta::after {
  display: none;
}

.nav-link.nav-cta:hover {
  background: var(--color-primary-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(10, 77, 140, 0.3);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 30px;
  justify-content: center;
  align-items: center;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #FFFFFF;
  padding-top: 100px;
  padding-bottom: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-grad {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    #062C4F 0%,
    #0A4D8C 50%,
    #0E3A66 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  flex: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  max-width: 620px;
}

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 24px;
  padding: 6px 14px;
  border: 1px solid rgba(255, 107, 43, 0.35);
  border-radius: var(--radius-sm);
  background: rgba(255, 107, 43, 0.08);
}

.hero-title {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  text-wrap: pretty;
}

.accent-text {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* Hero visual / product image */
.hero-visual {
  position: relative;
}

.hero-product-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  background: #0a1a2f;
}

.hero-product-img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-product-tag {
  position: absolute;
  bottom: -16px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  color: var(--color-primary-dark);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-display);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4CAF50;
  flex-shrink: 0;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.7);
  z-index: 2;
  cursor: pointer;
  transition: color var(--transition-base);
}

.scroll-indicator:hover {
  color: var(--color-accent);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: currentColor;
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--color-accent);
  animation: scrollDrop 2s ease-in-out infinite;
}

@keyframes scrollDrop {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

.scroll-text {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* ---------- Products Section ---------- */
.products-section {
  background: var(--color-bg-alt);
}

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

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

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

.product-icon {
  width: 56px;
  height: 56px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
  border: 1px solid var(--color-border-light);
}

.product-icon svg {
  width: 30px;
  height: 30px;
}

.product-photo-wrap {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
}

.product-photo {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.product-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  line-height: 1.3;
}

.product-desc {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.product-link {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-base);
}

.product-link span {
  transition: transform var(--transition-fast);
}

.product-link:hover {
  color: var(--color-accent);
}

.product-link:hover span {
  transform: translateX(4px);
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: block;
}

.about-image-badge {
  position: absolute;
  bottom: -16px;
  right: 20px;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 16px 22px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.badge-year {
  display: block;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
}

.badge-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-top: 4px;
}

.about-content .section-eyebrow {
  margin-bottom: 16px;
}

.about-content .section-title {
  text-align: left;
  font-size: 36px;
  margin-bottom: 24px;
}

.about-text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.about-text strong {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.about-features {
  margin-top: 36px;
  display: grid;
  gap: 20px;
}

.about-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about-feature-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 107, 43, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature-icon svg {
  width: 22px;
  height: 22px;
}

.about-feature h4 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---------- OEM / ODM Section ---------- */
.oem-section {
  background: var(--color-bg-dark);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.oem-section .container {
  position: relative;
  z-index: 1;
}

.oem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.oem-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-base);
}

.oem-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 107, 43, 0.3);
  transform: translateY(-4px);
}

.oem-number {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.oem-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.oem-desc {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-on-dark);
  opacity: 0.8;
}

.oem-cta {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.oem-cta h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.oem-cta p {
  font-size: 15px;
  color: var(--color-text-on-dark);
  opacity: 0.8;
}

/* ---------- Advantages Section ---------- */
.advantages-section {
  background: var(--color-bg);
}

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

.advantage-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition-base);
  position: relative;
}

.advantage-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 16px;
  border: 1px solid var(--color-border-light);
}

.advantage-icon svg {
  width: 24px;
  height: 24px;
}

.advantage-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

/* ---------- Quality Control Section ---------- */
.quality-section {
  background: var(--color-bg-alt);
}

.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.quality-content .section-eyebrow {
  margin-bottom: 16px;
}

.quality-content .section-title {
  text-align: left;
  font-size: 36px;
  margin-bottom: 20px;
}

.quality-intro {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
}

.qc-steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.qc-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.qc-step-marker {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(10, 77, 140, 0.25);
}

.qc-step-content h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
  padding-top: 10px;
}

.qc-step-content p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.quality-visual {
  position: relative;
}

.quality-img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.quality-stat-badge {
  position: absolute;
  top: 20px;
  left: -16px;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.qs-number {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.qs-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-top: 4px;
  text-transform: uppercase;
}

/* ---------- Global Reach Section ---------- */
.global-section {
  background: var(--color-bg);
}

.global-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.region-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition-base);
}

.region-card:hover {
  background: var(--color-surface);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.region-flag {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.region-flag svg {
  width: 48px;
  height: 48px;
}

.region-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.region-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.logistics-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  padding: 32px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  flex-wrap: wrap;
}

.logistics-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.logistics-icon {
  width: 36px;
  height: 36px;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logistics-icon svg {
  width: 24px;
  height: 24px;
}

/* ---------- Contact Section ---------- */
.contact-section {
  background: var(--color-bg-dark);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.contact-section .container {
  position: relative;
  z-index: 1;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
}

.contact-info h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.contact-intro {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-on-dark);
  opacity: 0.8;
  margin-bottom: 36px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  align-items: flex-start;
}

.contact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 107, 43, 0.15);
  color: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
}

.contact-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-on-dark);
  opacity: 0.6;
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.contact-value {
  font-size: 16px;
  font-weight: 500;
  color: #FFFFFF;
}

a.contact-value:hover {
  color: var(--color-accent-light);
}

.contact-socials {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.social-badges {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.social-badge {
  display: inline-block;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: #FFFFFF;
}

/* Contact Form */
.contact-form-wrap {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-on-dark);
  opacity: 0.9;
}

.form-group label span {
  color: var(--color-accent-light);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 15px;
  transition: all var(--transition-base);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 0 3px rgba(255, 107, 43, 0.15);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='white' fill-opacity='0.5' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--color-bg-dark);
  color: #FFFFFF;
}

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

.form-note {
  font-size: 13px;
  color: var(--color-text-on-dark);
  opacity: 0.5;
  text-align: center;
  margin-top: -4px;
}

/* Success state */
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.visible {
  display: block;
}

.contact-form.hidden {
  display: none;
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  color: #4CAF50;
}

.success-icon svg {
  width: 80px;
  height: 80px;
}

.form-success h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.form-success p {
  font-size: 15px;
  color: var(--color-text-on-dark);
  opacity: 0.8;
  margin-bottom: 28px;
  line-height: 1.65;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-deep);
  color: var(--color-text-on-dark);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-logo {
  height: 68px;
  width: auto;
  display: inline-block;
  padding: 12px 20px;
  background: #FFFFFF;
  border-radius: 8px;
  margin-bottom: 24px;
}

.footer-tagline {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  opacity: 0.7;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  opacity: 0.7;
  transition: all var(--transition-base);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-accent-light);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 14px;
}

.fc-label {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.5;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 13px;
  opacity: 0.5;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 13px;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.footer-bottom-links a:hover {
  opacity: 1;
  color: var(--color-accent-light);
}

/* ---------- Back to Top Button ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-dark);
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive Design ---------- */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .oem-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .global-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid,
  .quality-grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .hero-title {
    font-size: 42px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-text {
    max-width: 100%;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    max-width: 600px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding-y: 72px;
  }

  .section-title {
    font-size: 30px;
  }

  .section-subtitle {
    font-size: 16px;
  }

  /* Navigation */
  .mobile-menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .main-nav.open {
    max-height: 500px;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 16px 24px 24px;
    align-items: stretch;
  }

  .nav-list li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-list li:last-child {
    border-bottom: none;
    margin-top: 12px;
  }

  .nav-link {
    display: block;
    padding: 16px 0;
    width: 100%;
  }

  .nav-link.nav-cta {
    text-align: center;
    padding: 14px 22px;
  }

  /* Navigation */
  .nav-container {
    height: 80px;
  }

  .logo-img {
    height: 56px;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .hero-eyebrow {
    font-size: 11px;
    letter-spacing: 2px;
    margin-bottom: 20px;
  }

  .hero-title {
    font-size: 38px;
  }

  .hero-subtitle {
    font-size: 16px;
    margin-bottom: 32px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
    margin-bottom: 48px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    gap: 32px;
  }

  .stat-number {
    font-size: 28px;
  }

  .stat-label {
    font-size: 13px;
  }

  .scroll-indicator {
    display: none;
  }

  .hero-product-tag {
    bottom: -10px;
    left: 12px;
    padding: 8px 14px;
    font-size: 12px;
  }

  /* Products */
  .products-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .product-card {
    padding: 32px 24px;
  }

  /* About */
  .about-grid {
    gap: 48px;
  }

  .about-content .section-title {
    font-size: 28px;
  }

  .about-image-badge {
    bottom: -16px;
    right: 16px;
    padding: 14px 20px;
  }

  .badge-year {
    font-size: 22px;
  }

  /* OEM */
  .oem-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .oem-card {
    padding: 28px 24px;
  }

  .oem-cta {
    flex-direction: column;
    text-align: center;
    padding: 32px 28px;
  }

  /* Advantages */
  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Quality */
  .quality-content .section-title {
    font-size: 28px;
  }

  .quality-stat-badge {
    top: 16px;
    left: 16px;
    padding: 14px 18px;
  }

  .qs-number {
    font-size: 24px;
  }

  /* Global */
  .global-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .logistics-bar {
    gap: 24px;
    padding: 24px;
  }

  /* Contact */
  .contact-form-wrap {
    padding: 28px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Back to top */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 32px;
  }

  .section-title {
    font-size: 26px;
  }

  .stat-number {
    font-size: 24px;
  }
}