/* ============================================
   绍兴圆方半导体有限公司 - Circle Semiconductor
   Style: Bosch Sensortec Inspired Professional
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primary Colors */
  --color-primary-dark: #002855;
  --color-primary: #005A9E;
  --color-primary-medium: #0072BC;
  --color-primary-light: #4A90D9;
  --color-primary-lighter: #E8F0FE;

  /* Accent / Brand */
  --color-accent: #00A3E0;
  --color-accent-hover: #0088C7;
  --color-accent-warm: #E8913A;
  --color-accent-green: #2ECC71;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-bg-light: #F5F7FA;
  --color-bg-lighter: #FAFBFC;
  --color-border: #E1E5EA;
  --color-border-light: #F0F2F5;

  /* Text */
  --color-text-primary: #1A1A2E;
  --color-text-secondary: #5A6A7A;
  --color-text-muted: #8E9AAB;
  --color-text-inverse: #FFFFFF;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;
  --border-radius: 8px;
  --border-radius-lg: 16px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Font */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
}

/* --- Reset & Base --- */
*, *::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-sans);
  color: var(--color-text-primary);
  line-height: 1.6;
  background: var(--color-white);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

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

.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--color-bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  position: relative;
}

.section-tag::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

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

.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.0625rem;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo img {
  height: 42px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text-main {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.3;
  white-space: nowrap;
}

.logo-text-sub {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border-radius: 6px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

.nav-link .arrow {
  font-size: 0.625rem;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link .arrow {
  transform: rotate(180deg);
}

/* --- Dropdown --- */
.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 200px;
  background: var(--color-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  border: 1px solid var(--color-border-light);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(4px);
  pointer-events: auto;
}

.dropdown-link {
  display: block;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* 3rd level dropdown (nested) */
.dropdown-nested {
  position: relative;
}

.dropdown-nested > .dropdown-link::after {
  content: '›';
  position: absolute;
  right: 16px;
  font-size: 1.1rem;
}

.dropdown-nested-content {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 180px;
  background: var(--color-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border-light);
  margin-left: 4px;
}

.dropdown-nested:hover .dropdown-nested-content {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Nested dropdown links should stack vertically */
.dropdown-nested-content a {
  display: block;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border-radius: 4px;
  white-space: nowrap;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.dropdown-nested-content a:hover {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* --- Language Toggle --- */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

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

/* --- Mobile Menu Toggle --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-accent) 100%);
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,163,224,0.2) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(0,90,158,0.3) 0%, transparent 45%);
  z-index: 1;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
}

.hero-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  animation: float linear infinite;
}

.hero-actions .btn[style*="background:#ffffff"]:hover {
  background: #f0f0f0 !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  width: 100%;
  padding: 0 24px;
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  font-size: 0.8125rem;
  color: var(--color-white);
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-accent), #66D9FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
}

.hero-scroll-indicator .mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 12px;
  position: relative;
}

.hero-scroll-indicator .mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: rgba(255,255,255,0.6);
  border-radius: 2px;
  animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.3; transform: translateX(-50%) translateY(6px); }
}

@keyframes float {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100vh) translateX(100px); opacity: 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 24px;
  line-height: 1.3;
}

.about-content p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: 28px;
  text-align: center;
  transition: all var(--transition-normal);
}

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

.stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* --- Values --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.value-card {
  text-align: center;
  padding: 40px 28px;
  border-radius: var(--border-radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

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

.value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--color-primary-lighter);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.value-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
}

.value-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */
.products-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
}

.product-tab {
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-white);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-tab:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.product-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

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

.product-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.product-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.product-badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
}

.badge-auto {
  background: #FFF3E0;
  color: #E65100;
}

.badge-functional {
  background: #E3F2FD;
  color: #1565C0;
}

.badge-standard {
  background: #E8F5E9;
  color: #2E7D32;
}

.product-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.product-specs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.product-spec {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  padding: 4px 0;
  border-bottom: 1px dashed var(--color-border-light);
}

.product-spec-key {
  color: var(--color-text-muted);
}

.product-spec-value {
  color: var(--color-text-primary);
  font-weight: 600;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.product-link:hover {
  gap: 10px;
}

/* ============================================
   APPLICATIONS SECTION
   ============================================ */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.app-card {
  position: relative;
  padding: 48px 28px;
  text-align: center;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.app-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.app-card:hover::after {
  transform: scaleX(1);
}

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

.app-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.app-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.app-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================
   TECHNOLOGY / FEATURES
   ============================================ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.tech-card {
  padding: 36px 28px;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

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

.tech-icon {
  width: 52px;
  height: 52px;
  background: var(--color-primary-lighter);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.tech-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
}

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

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.contact-info > p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  font-size: 1rem;
}

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

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

.contact-item-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--color-primary-lighter);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
}

.contact-item h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  line-height: 1.5;
}

.contact-item a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-item a:hover {
  color: var(--color-primary-dark);
}

/* --- Contact Form --- */
.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  border: 1.5px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-lighter);
  transition: all var(--transition-fast);
  color: var(--color-text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,90,158,0.12);
  background: var(--color-white);
}

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

/* --- Office Addresses --- */
.offices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.office-card {
  padding: 28px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
}

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

.office-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.office-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 10px;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  border-radius: 100px;
  margin-bottom: 12px;
}

.office-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.contact-qr {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.contact-qr img {
  width: 144px;
  height: 144px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  padding: 3px;
  background: #fff;
}

.contact-qr span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-primary-dark);
  color: var(--color-text-inverse);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 360px;
}

.footer h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-list li {
  margin-bottom: 12px;
}

.footer-list a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition-fast);
}

.footer-list a:hover {
  color: var(--color-white);
}

.footer-bottom {
  margin-top: 48px;
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  z-index: 900;
}

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

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .offices-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-lg {
    padding: 14px 28px;
    text-align: center;
  }

  /* Mobile Nav */
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
  }

  .nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-link {
    padding: 14px 16px;
    justify-content: space-between;
  }

  .dropdown {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
  }

  .nav-item:hover .dropdown {
    transform: none;
  }

  .dropdown.open {
    display: block;
  }

  .dropdown-nested-content {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
  }

  .dropdown-nested-content.open {
    display: block;
  }

  .lang-toggle {
    margin: 12px 0 0;
    width: 100%;
    justify-content: center;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .tech-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-form {
    padding: 24px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .apps-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .offices-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .products-tabs {
    flex-direction: column;
    align-items: stretch;
    padding: 0 24px;
  }

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .apps-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .logo img {
    height: 32px;
  }

  .logo-text-main {
    font-size: 0.85rem;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .header,
  .back-to-top,
  .hero-scroll-indicator,
  .footer {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .section {
    padding: 40px 0;
    page-break-inside: avoid;
  }
}