/* ===== CSS Variables & Theme System ===== */
:root {
  /* Dark theme (default) */
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --bg-input: #1e1e1e;
  --text-primary: #f5f5f5;
  --text-secondary: #a3a3a3;
  --text-muted: #737373;
  --accent: #f97316;
  --accent-hover: #fb923c;
  --accent-glow: rgba(249, 115, 22, 0.3);
  --border: #262626;
  --border-light: #333333;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(10, 10, 10, 0.85);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(249, 115, 22, 0.08) 0%, transparent 60%);
  --code-bg: #1e1e1e;
}

[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f5f5f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f0;
  --bg-input: #f5f5f5;
  --text-primary: #171717;
  --text-secondary: #525252;
  --text-muted: #a3a3a3;
  --accent: #ea580c;
  --accent-hover: #f97316;
  --accent-glow: rgba(234, 88, 12, 0.15);
  --border: #e5e5e5;
  --border-light: #d4d4d4;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.12);
  --nav-bg: rgba(250, 250, 250, 0.85);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(234, 88, 12, 0.06) 0%, transparent 60%);
  --code-bg: #f0f0f0;
}

/* ===== 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", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

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

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.02em;
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
  font-size: 1rem;
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
}

/* Language Toggle */
.lang-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  font-family: inherit;
}

.lang-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
}

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

.nav-hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 64px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-company-name {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--accent), #fbbf24, var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0% { background-position: 0% center; }
  50% { background-position: 100% center; }
  100% { background-position: 0% center; }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero h1:first-of-type {
  /* The company name h1 is styled via .hero-company-name */
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.typing-cursor {
  display: inline-block;
  width: 3px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s infinite;
  vertical-align: text-bottom;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ea580c);
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ===== Section ===== */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #fbbf24);
  border-radius: 2px;
  margin: 1rem auto 0;
}

/* ===== Product Cards ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--card-accent, var(--accent)), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

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

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

.product-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.product-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.product-card .product-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 6px;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.product-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  transition: gap 0.2s;
}

.product-link:hover {
  gap: 0.7rem;
}

/* Product card color variants */
.product-card.baiyingbang .product-icon {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}
.product-card.baiyingbang {
  --card-accent: #22c55e;
}
.product-card.baiyingbang .product-tag {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}

.product-card.mibaohe .product-icon {
  background: rgba(139, 92, 246, 0.12);
  color: #8b5cf6;
}
.product-card.mibaohe {
  --card-accent: #8b5cf6;
}
.product-card.mibaohe .product-tag {
  background: rgba(139, 92, 246, 0.12);
  color: #8b5cf6;
}

.product-card.xiangshang .product-icon {
  background: rgba(59, 130, 246, 0.12);
  color: #3b82f6;
}
.product-card.xiangshang {
  --card-accent: #3b82f6;
}
.product-card.xiangshang .product-tag {
  background: rgba(59, 130, 246, 0.12);
  color: #3b82f6;
}

/* ===== Product Detail Page ===== */
.product-hero {
  padding-top: 120px;
  padding-bottom: 4rem;
  background: var(--gradient-hero);
  position: relative;
}

.product-hero::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.product-hero-inner {
  display: flex;
  align-items: center;
  gap: 4rem;
  position: relative;
  z-index: 1;
}

.product-hero-text {
  flex: 1;
}

.product-hero-text .back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}

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

.product-hero-text h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.product-hero-text .product-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.product-hero-visual {
  width: 280px;
  height: 280px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  flex-shrink: 0;
  position: relative;
}

.product-hero-visual::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 26px;
  background: linear-gradient(135deg, var(--card-accent, var(--accent)), transparent);
  opacity: 0.3;
  z-index: -1;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.2s;
}

.feature-item:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.feature-item .feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 1rem;
  background: var(--accent-glow);
  color: var(--accent);
}

.feature-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Download Section */
.download-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 0;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
}

.download-btn:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.download-btn .store-icon {
  font-size: 1.5rem;
}

.download-btn .store-info {
  text-align: left;
}

.download-btn .store-info small {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
}

/* Coming Soon Card */
.coming-soon-card {
  text-align: center;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-light);
  border-radius: 16px;
  max-width: 400px;
  margin: 0 auto;
}

.coming-soon-card .coming-soon-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.coming-soon-card h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.coming-soon-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== About Page ===== */
.about-hero {
  padding-top: 120px;
  padding-bottom: 4rem;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
}

.about-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.about-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Vision */
.vision-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.vision-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s;
}

.vision-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.vision-card .vision-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.vision-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

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

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

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

.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-info-list li:last-child {
  border-bottom: none;
}

.contact-info-list .contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-info-list h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.contact-info-list p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Message Form */
.message-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

.message-form h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

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

.form-status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
}

.footer-logos {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 1rem;
}

.footer-logos .footer-logo-left,
.footer-logos .footer-logo-right {
  flex-shrink: 0;
}

.footer-logos .footer-logo-left img,
.footer-logos .footer-logo-right img {
  width: 128px;
  height: 128px;
  object-fit: contain;
}

.footer-logos .footer-logo-left img {
  border-radius: 16px;
}

.footer-inner p,
.footer-right {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-inner .company-name {
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-right a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color 0.2s;
}

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

.footer-beian {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  width: 100%;
  text-align: center;
  display: block;
}

.footer-beian a {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-beian a:hover {
  color: var(--text-secondary);
}

/* ===== Animations ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger delays */
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.3s;
  opacity: 0;
  visibility: hidden;
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== Loading Screen ===== */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-logo {
  width: 240px;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse 1.5s infinite;
}

.loading-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
}

/* ===== Carousel ===== */
.carousel-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.carousel-label {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  text-align: center;
}

.carousel {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-slide {
  min-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.carousel-slide img {
  max-width: 100%;
  max-height: 600px;
  object-fit: contain;
  border-radius: 8px;
  user-select: none;
  -webkit-user-drag: none;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.2s;
  z-index: 10;
  opacity: 0;
}

.carousel:hover .carousel-btn {
  opacity: 1;
}

.carousel-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 1rem 0;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-light);
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  padding: 0;
}

.carousel-dot.active {
  background: var(--accent);
  width: 24px;
  border-radius: 4px;
}

.carousel-dot:hover {
  background: var(--accent-hover);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }

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

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

  .product-hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .product-hero-visual {
    width: 180px;
    height: 180px;
    font-size: 4rem;
  }

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

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

  .section {
    padding: 4rem 0;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .carousel-slide img {
    max-height: 400px;
  }

  .carousel-btn {
    opacity: 1;
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
  }

  .carousel-slide {
    padding: 0.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1.25rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
}