/**
 * QCCast - Jinjiang Qucheng Machinery Co., Ltd.
 * Theme: Orange, Black, Gray
 * Design: Industrial, Professional, Modern
 * Development: Static HTML + CSS3 + JavaScript
 */

/* ===== CSS Variables ===== */
:root {
  /* Primary Colors - Orange Black Gray */
  --color-primary: #FF6B35;
  --color-secondary: #1A1A1A;
  --color-tertiary: #6C757D;

  /* Auxiliary Colors */
  --color-white: #FFFFFF;
  --color-light-gray: #F8F9FA;
  --color-dark-gray: #343A40;
  --color-text: #333333;
  --color-text-light: #6C757D;

  /* Spacing System */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-xxxl: 64px;

  /* Font Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-xxl: 32px;
  --font-size-xxxl: 48px;

  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-pill: 50px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
  --shadow-elevated: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-primary: 0 10px 30px rgba(255, 107, 53, 0.3);

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

a:hover {
  color: var(--color-secondary);
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', 'Open Sans', sans-serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-lg);
}

h1 {
  font-size: var(--font-size-xxxl);
}

h2 {
  font-size: var(--font-size-xxl);
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-lg);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-md);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: var(--font-size-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

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

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

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

.btn-outline-light:hover {
  background-color: var(--color-white);
  color: var(--color-secondary);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xxl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* ===== Navigation ===== */
.navbar {
  background-color: var(--color-secondary);
  box-shadow: var(--shadow-sm);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-normal);
}

.navbar-fixed {
  background: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(10px);
}

.navbar-fixed.scrolled {
  background: rgba(26, 26, 26, 0.99);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
}

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

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: var(--spacing-md);
}

.logo-text {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-white);
}

.logo-text span,
.logo-dot {
  color: var(--color-primary);
}

.logo-tagline {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.7);
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.nav-icon {
  font-size: var(--font-size-sm);
}

.nav-cta {
  margin-left: var(--spacing-md);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-sm);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-tertiary) 100%);
  color: var(--color-white);
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(255, 107, 53, 0.1) 2px, transparent 2px),
    radial-gradient(circle at 75% 75%, rgba(255, 107, 53, 0.1) 2px, transparent 2px);
  background-size: 100px 100px;
  opacity: 0.3;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(26, 26, 26, 0.92) 0%, rgba(108, 117, 125, 0.8) 100%);
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

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

.hero-badge {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.badge {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 500;
  backdrop-filter: blur(10px);
}

.badge-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

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

.hero-title .highlight {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 0;
  width: 100%;
  height: 10px;
  background: var(--color-primary);
  opacity: 0.25;
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xxl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xxl);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  font-family: 'Montserrat', sans-serif;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
}

.hero-image {
  position: relative;
}

.hero-image-container {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
}

.hero-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.hero-image-container:hover .hero-img {
  transform: scale(1.05);
}

.hero-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 26, 26, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-button {
  width: 80px;
  height: 80px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
}

.play-button:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-primary);
}

.play-button i {
  color: var(--color-white);
  font-size: 2rem;
  margin-left: 5px;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.mouse {
  width: 26px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 13px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0% { top: 8px; opacity: 1; }
  100% { top: 24px; opacity: 0; }
}

.arrow i {
  color: var(--color-white);
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section-title {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.divider-line {
  width: 60px;
  height: 2px;
  background: var(--color-primary);
}

.divider-icon {
  color: var(--color-primary);
  font-size: 1.25rem;
}

/* ===== Advantages Section ===== */
.advantages {
  background: var(--color-light-gray);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.advantage-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

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

.advantage-card-primary .advantage-title,
.advantage-card-primary .advantage-description,
.advantage-card-primary .advantage-features li {
  color: var(--color-white);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  background: rgba(255, 107, 53, 0.1);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.advantage-icon i {
  font-size: 1.5rem;
  color: var(--color-primary);
}

.advantage-card-primary .advantage-icon {
  background: rgba(255, 255, 255, 0.2);
}

.advantage-card-primary .advantage-icon i {
  color: var(--color-white);
}

.advantage-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.advantage-description {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.advantage-features {
  list-style: none;
}

.advantage-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.advantage-features i {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
}

.advantage-card-primary .advantage-features i {
  color: var(--color-white);
}

/* ===== Products Section ===== */
.products {
  background: var(--color-white);
}

.products-tabs {
  background: var(--color-light-gray);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.tabs-header {
  display: flex;
  flex-wrap: wrap;
  background: var(--color-white);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.tab-btn {
  flex: 1;
  min-width: 150px;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  font-family: 'Montserrat', sans-serif;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.tab-btn.active {
  color: var(--color-primary);
  background: var(--color-light-gray);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.tab-btn:hover:not(.active) {
  background: rgba(255, 107, 53, 0.05);
  color: var(--color-primary);
}

.tabs-content {
  padding: var(--spacing-xxl);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.product-image {
  position: relative;
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

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

.product-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.product-title {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.product-description {
  font-size: var(--font-size-md);
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}

.product-specs {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-xl);
}

.spec-item {
  display: flex;
  margin-bottom: var(--spacing-md);
}

.spec-item:last-child {
  margin-bottom: 0;
}

.spec-label {
  font-weight: 600;
  color: var(--color-secondary);
  min-width: 120px;
}

.spec-value {
  color: var(--color-text-light);
}

/* ===== Testimonials Section ===== */
.testimonials {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-tertiary) 100%);
  color: var(--color-white);
}

.testimonials .section-title,
.testimonials .section-subtitle {
  color: var(--color-white);
}

.testimonials-slider {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.testimonial-slide {
  display: none;
  text-align: center;
}

.testimonial-slide.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

.testimonial-quote {
  position: relative;
  padding: var(--spacing-xxl);
  margin-bottom: var(--spacing-xl);
}

.testimonial-quote i {
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.15);
}

.testimonial-quote i:first-child {
  position: absolute;
  top: 0;
  left: 0;
}

.testimonial-quote i:last-child {
  position: absolute;
  bottom: 0;
  right: 0;
}

.testimonial-quote p {
  font-size: 1.25rem;
  line-height: 1.8;
  font-style: italic;
  color: var(--color-white);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-primary);
}

.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.author-title {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-sm);
}

.author-rating {
  color: var(--color-primary);
}

.author-rating i {
  margin-right: 2px;
}

.slider-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.slider-prev,
.slider-next,
.slider-dot {
  background: none;
  border: none;
  color: var(--color-white);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.slider-prev,
.slider-next {
  font-size: var(--font-size-lg);
  padding: var(--spacing-sm);
}

.slider-prev:hover,
.slider-next:hover {
  color: var(--color-primary);
}

.slider-dots {
  display: flex;
  gap: var(--spacing-sm);
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
}

.slider-dot.active {
  background: var(--color-primary);
}

/* ===== CTA Section ===== */
.cta {
  background: var(--color-light-gray);
}

.cta-content {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-xxxl);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.cta-title {
  color: var(--color-white);
  font-size: var(--font-size-xxl);
  margin-bottom: var(--spacing-lg);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  max-width: 700px;
  margin: 0 auto var(--spacing-xxl);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-xxxl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xxl);
  margin-bottom: var(--spacing-xxl);
}

.footer-col {
  min-width: 200px;
}

.footer-logo {
  font-family: 'Montserrat', sans-serif;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
}

.footer-logo span {
  color: var(--color-primary);
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--color-white);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-3px);
}

.footer-title {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  display: inline-block;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

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

.contact-info {
  list-style: none;
}

.contact-info li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.7);
}

.contact-info i {
  color: var(--color-primary);
  margin-top: 4px;
  width: 16px;
  text-align: center;
}

.copyright {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
}

.copyright p {
  margin-bottom: var(--spacing-sm);
}

/* ===== Page Header ===== */
.page-header {
  background: linear-gradient(rgba(26, 26, 26, 0.9), rgba(26, 26, 26, 0.9)),
              url('https://images.unsplash.com/photo-1504917595217-d4dc5ebe6122?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--color-white);
  padding: 160px 0 80px;
  text-align: center;
  margin-top: 70px;
}

.page-header h1 {
  color: var(--color-white);
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.page-header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xxl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-xxxl);
  display: flex;
  align-items: center;
}

.timeline-year {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-weight: 700;
  font-size: var(--font-size-md);
  z-index: 1;
  white-space: nowrap;
}

.timeline-content {
  width: calc(50% - 50px);
  padding: var(--spacing-xl);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: auto;
  margin-right: 50px;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 50px;
}

/* ===== Contact Section ===== */
.contact-section {
  background: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.contact-info-wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.contact-card {
  background: var(--color-light-gray);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.contact-card-icon {
  width: 64px;
  height: 64px;
  background: rgba(255, 107, 53, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
}

.contact-card-icon i {
  font-size: 1.5rem;
  color: var(--color-primary);
}

.contact-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.contact-card-text {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

.contact-form {
  background: var(--color-light-gray);
  padding: var(--spacing-xxl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.form-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-secondary);
  font-size: var(--font-size-sm);
}

.form-control {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid #ddd;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-md);
  font-family: inherit;
  transition: all var(--transition-fast);
  background: var(--color-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* ===== Map Section ===== */
.map-section {
  height: 400px;
  background: var(--color-tertiary);
  position: relative;
}

.map-section iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-light { background-color: var(--color-light-gray); }
.bg-dark { background-color: var(--color-secondary); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-xxl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-xxl); }

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-secondary);
  transform: translateY(-5px);
}

/* ===== Loader ===== */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  font-family: 'Montserrat', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-xl);
}

.loader-logo span {
  color: var(--color-primary);
}

.loader-progress {
  width: 200px;
  height: 4px;
  background: var(--color-light-gray);
  border-radius: var(--border-radius-pill);
  overflow: hidden;
  margin: 0 auto;
}

.loader-bar {
  height: 100%;
  background: var(--color-primary);
  width: 0%;
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0%; margin-left: 0; }
  50% { width: 100%; margin-left: 0; }
  100% { width: 0%; margin-left: 100%; }
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

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

  .hero-title {
    font-size: 2.8rem;
  }

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

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

  .hero-image {
    display: none;
  }

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

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

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-secondary);
    flex-direction: column;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    gap: 0;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-item {
    width: 100%;
    margin-bottom: var(--spacing-md);
  }

  .nav-link {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    justify-content: center;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--spacing-md);
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
    justify-content: center;
  }

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

  .hero {
    padding-top: 100px;
    min-height: auto;
  }

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

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .stat-number {
    font-size: 2rem;
  }

  .advantages-grid,
  .timeline-content,
  .product-detail {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-year {
    left: 20px;
    transform: translateX(-50%);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-md);
  }

  .timeline-content {
    width: calc(100% - 60px);
    margin-left: 60px !important;
    margin-right: 0 !important;
  }

  .tabs-header {
    flex-direction: column;
  }

  .tab-btn {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  }

  .tab-btn::after {
    height: 100%;
    width: 3px;
    left: 0;
    bottom: auto;
    transform: scaleY(0);
  }

  .tab-btn.active::after {
    transform: scaleY(1);
  }

  .cta-content {
    padding: var(--spacing-xxl);
  }

  .cta-title {
    font-size: var(--font-size-xl);
  }

  .page-header {
    padding: 120px 0 60px;
  }

  .page-header h1 {
    font-size: 2.2rem;
  }

  .contact-info-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero {
    padding: 80px 0 60px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: var(--font-size-md);
  }

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

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

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

  .section-title {
    font-size: var(--font-size-xl);
  }

  .section-subtitle {
    font-size: var(--font-size-md);
  }

  .contact-form {
    padding: var(--spacing-lg);
  }

  .cta-content {
    padding: var(--spacing-xl);
  }
}

/* ===== Print Styles ===== */
@media print {
  .navbar,
  .back-to-top,
  .scroll-indicator,
  .play-button,
  .loader {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-xl) 0;
  }

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

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus styles */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background: var(--color-primary);
  color: var(--color-white);
}