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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

/* ===== CSS Variables & Themes ===== */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --text-primary: #f0f0f0;
  --text-secondary: #b0b0c0;
  --accent: #f0c040;
  --accent-hover: #e0b030;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.12);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(0, 0, 0, 0.03);
  --text-primary: #1a1a2e;
  --text-secondary: #555570;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ===== Typography & Links ===== */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s;
}

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

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

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

.section {
  padding: 80px 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), #e8b030);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 48px;
  line-height: 1.6;
}

/* ===== Glassmorphism ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: #1a1a2e;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(240, 192, 64, 0.3);
  color: #1a1a2e;
}

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

.btn-outline:hover {
  background: var(--accent);
  color: #1a1a2e;
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo svg {
  height: 36px;
  width: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav a {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-xs);
  transition: all 0.3s;
}

nav a:hover,
nav a.active {
  color: var(--accent);
  background: rgba(240, 192, 64, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle,
.menu-toggle,
.search-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-xs);
  transition: background 0.3s;
}

.theme-toggle:hover,
.menu-toggle:hover,
.search-toggle:hover {
  background: var(--glass-bg);
}

.menu-toggle {
  display: none;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--glass-border);
  padding: 24px;
  z-index: 999;
  flex-direction: column;
  gap: 12px;
}

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

.mobile-menu a {
  padding: 12px 16px;
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  font-size: 1rem;
}

.mobile-menu a:hover {
  color: var(--accent);
  background: rgba(240, 192, 64, 0.1);
}

/* ===== Search Modal ===== */
.search-modal {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--glass-border);
  padding: 24px;
  z-index: 999;
}

.search-modal.open {
  display: block;
}

.search-modal input {
  width: 100%;
  padding: 16px 24px;
  border: 2px solid var(--glass-border);
  border-radius: 50px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}

.search-modal input:focus {
  border-color: var(--accent);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(240, 192, 64, 0.08), transparent 60%),
    radial-gradient(ellipse at 70% 50%, rgba(100, 100, 200, 0.06), transparent 60%);
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-content {
  flex: 1;
}

.hero-content h1 {
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero-content h1 span {
  background: linear-gradient(135deg, var(--accent), #e8b030);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 540px;
}

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

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 500px;
  height: auto;
}

.hero-carousel {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.hero-carousel .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  opacity: 0.4;
  cursor: pointer;
  transition: all 0.3s;
}

.hero-carousel .dot.active {
  opacity: 1;
  background: var(--accent);
  width: 36px;
  border-radius: 6px;
}

/* ===== Brand Intro ===== */
.brand-intro {
  background: var(--bg-secondary);
}

.brand-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.brand-text p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.brand-visual svg {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

/* ===== Story Timeline ===== */
.story {
  position: relative;
}

.story-timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
  position: relative;
  padding-left: 40px;
}

.story-timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  opacity: 0.3;
}

.story-item {
  position: relative;
}

.story-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
}

.story-item h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.story-item p {
  color: var(--text-secondary);
}

/* ===== Culture Grid ===== */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.culture-card {
  padding: 32px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.culture-card svg {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
}

.culture-card h3 {
  margin-bottom: 8px;
}

.culture-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Team Grid ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.team-card {
  padding: 24px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.3s, box-shadow 0.3s;
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.team-card svg {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--accent);
  padding: 4px;
}

.team-card h4 {
  margin-bottom: 4px;
}

.team-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== Products Grid ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

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

.product-card svg {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
}

.product-card h3 {
  margin-bottom: 8px;
}

.product-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.product-card .tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(240, 192, 64, 0.15);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.8rem;
}

/* ===== Advantages ===== */
.advantages {
  background: var(--bg-secondary);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.adv-card {
  padding: 28px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.3s, box-shadow 0.3s;
}

.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.adv-card svg {
  width: 44px;
  height: 44px;
  margin: 0 auto 12px;
}

.adv-card h4 {
  margin-bottom: 6px;
}

.adv-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== Solutions Grid ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.solution-card {
  padding: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.solution-card svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
}

.solution-card h3 {
  margin-bottom: 8px;
}

.solution-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Industry Grid ===== */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.industry-card {
  padding: 24px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.3s, box-shadow 0.3s;
}

.industry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.industry-card svg {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
}

.industry-card h4 {
  margin-bottom: 6px;
}

.industry-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== Stats ===== */
.stats {
  background: var(--bg-secondary);
}

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

.stat-item {
  padding: 24px;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ===== Cases Grid ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.case-card {
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.case-card svg {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.case-card h3 {
  margin-bottom: 8px;
}

.case-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Clients Grid ===== */
.clients-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
}

.client-item svg {
  width: 100px;
  height: 60px;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.client-item svg:hover {
  opacity: 1;
}

/* ===== Testimonials ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.testimonial-card::before {
  content: '"';
  font-size: 4rem;
  color: var(--accent);
  opacity: 0.3;
  position: absolute;
  top: 8px;
  left: 16px;
  font-family: serif;
}

.testimonial-card p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-card .author svg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.testimonial-card .author span {
  font-weight: 600;
}

/* ===== News Grid ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.news-card {
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.news-card .date {
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.news-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.news-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Related Grid ===== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.related-card {
  padding: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.related-card h4 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.related-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item:hover {
  box-shadow: var(--shadow);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s;
}

.faq-question:hover {
  background: rgba(240, 192, 64, 0.05);
}

.faq-question .icon {
  font-size: 1.4rem;
  transition: transform 0.3s;
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-secondary);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== HowTo Steps ===== */
.howto-steps {
  max-width: 700px;
  margin: 0 auto;
  counter-reset: step;
}

.howto-step {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.howto-step:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow);
}

.howto-step .num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #1a1a2e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.howto-step h4 {
  margin-bottom: 4px;
}

.howto-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

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

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

.contact-item svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.contact-item h4 {
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  padding: 14px 18px;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(240, 192, 64, 0.1);
}

.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}

/* ===== Friend Links ===== */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.friend-links a {
  padding: 8px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all 0.3s;
}

.friend-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(240, 192, 64, 0.05);
}

/* ===== Sitemap ===== */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
}

.sitemap-col h4 {
  margin-bottom: 12px;
  color: var(--accent);
}

.sitemap-col a {
  display: block;
  padding: 4px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.3s;
}

.sitemap-col a:hover {
  color: var(--accent);
}

/* ===== Footer ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 48px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 12px;
  font-size: 0.9rem;
}

.footer-col h4 {
  margin-bottom: 16px;
  color: var(--accent);
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.3s;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom-links a {
  color: var(--text-secondary);
  transition: color 0.3s;
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #1a1a2e;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(240, 192, 64, 0.3);
  transition: all 0.3s;
  z-index: 100;
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 24px rgba(240, 192, 64, 0.4);
}

/* ===== Lazy Load SVG ===== */
.lazy-svg {
  opacity: 0;
  transition: opacity 0.6s;
}

.lazy-svg.visible {
  opacity: 1;
}

/* ===== Responsive: Tablet & Mobile ===== */
@media (max-width: 768px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

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

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

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

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

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

  nav a {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

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

  .hero-visual {
    display: none;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-subtitle {
    margin-bottom: 32px;
  }

  .story-timeline {
    padding-left: 30px;
  }

  .story-item::before {
    left: -22px;
    width: 12px;
    height: 12px;
  }
}

/* ===== Responsive: Small Mobile ===== */
@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

  .container {
    padding: 0 16px;
  }

  .section {
    padding: 48px 0;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .culture-grid,
  .team-grid,
  .products-grid,
  .adv-grid,
  .solutions-grid,
  .industry-grid,
  .cases-grid,
  .testimonials-grid,
  .news-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-grid {
    gap: 32px;
  }

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

  .footer-bottom-links {
    justify-content: center;
  }
}

/* ===== Extra: Large Screens ===== */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }

  .hero-content h1 {
    font-size: 4rem;
  }
}