/* ============================================
   ChinaBizGuides — Premium Design System v2.0
   ============================================ */

/* ─── CSS Variables ─── */
:root {
  /* Brand */
  --red-50: #fef2f2;
  --red-100: #fee2e2;
  --red-200: #fecaca;
  --red-500: #ef4444;
  --red-600: #dc2626;
  --red-700: #b91c1c;
  --red-800: #991b1b;
  
  /* Neutrals */
  --stone-50: #fafaf9;
  --stone-100: #f5f5f4;
  --stone-200: #e7e5e4;
  --stone-300: #d6d3d1;
  --stone-400: #a8a29e;
  --stone-500: #78716c;
  --stone-600: #57534e;
  --stone-700: #44403c;
  --stone-800: #292524;
  --stone-900: #1c1917;
  
  /* Accent */
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  
  /* Semantic */
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-hover: var(--stone-50);
  --color-border: var(--stone-200);
  --color-border-light: var(--stone-100);
  --color-text: var(--stone-900);
  --color-text-secondary: var(--stone-500);
  --color-text-tertiary: var(--stone-400);
  --color-primary: var(--red-600);
  --color-primary-dark: var(--red-700);
  --color-primary-light: var(--red-50);
  --color-success: var(--green-500);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, monospace;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  
  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-6);
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);
  --shadow-glow: 0 4px 20px rgba(220,38,38,0.25);
  
  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--stone-100); }
::-webkit-scrollbar-thumb { background: var(--stone-300); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--stone-400); }

/* ─── Utilities ─── */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.gradient-text {
  background: linear-gradient(135deg, var(--red-600) 0%, #ea580c 50%, var(--amber-500) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Typography ─── */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--color-text); }
h1 { font-size: clamp(2.2rem, 5vw, 3.75rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); letter-spacing: -0.02em; }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
h4 { font-size: 1.05rem; }
p { color: var(--color-text-secondary); }
.section-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-top: var(--space-3);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}
.section-header h2 { margin-bottom: var(--space-2); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  border: 2px solid transparent;
  font-family: inherit;
  line-height: 1;
  white-space: nowrap;
}
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-lg { padding: 16px 32px; font-size: 1.1rem; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(220,38,38,0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-text);
  background: var(--color-surface-hover);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover { color: var(--color-text); background: var(--stone-100); }
.btn-white {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}
.btn-success {
  background: var(--green-500);
  color: #fff;
}
.btn-success:hover { background: var(--green-600); transform: translateY(-2px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ─── Navigation ─── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px) saturate(1.8);
  -webkit-backdrop-filter: blur(16px) saturate(1.8);
  border-bottom: 1px solid var(--color-border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--red-600), #ea580c);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
}
.logo-china { color: var(--red-600); }
.logo-accent { color: var(--stone-400); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: var(--space-1); }
.nav-link {
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
}
.nav-link:hover { color: var(--color-text); background: var(--stone-100); }
.nav-link.active { color: var(--color-primary); background: var(--color-primary-light); }
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--stone-100);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast);
}
.mobile-menu-btn:hover { background: var(--stone-200); }
.mobile-menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all 0.3s var(--ease-out);
}
.mobile-menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ─── Hero ─── */
.hero {
  padding: var(--space-20) 0 var(--space-16);
  background: linear-gradient(180deg, #fff 0%, var(--stone-50) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(220,38,38,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--space-5);
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red-500);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.hero-title { margin-bottom: var(--space-5); }
.hero-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 520px;
}
.hero-cta { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; }
.hero-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  position: relative;
}
.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
  animation: fade-up 0.6s var(--ease-out) both;
}
.hero-card:nth-child(1) { animation-delay: 0.1s; }
.hero-card:nth-child(2) { animation-delay: 0.25s; }
.hero-card:nth-child(3) { animation-delay: 0.4s; }
.hero-card:nth-child(4) {
  animation-delay: 0.55s;
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
}
.hero-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.hero-card-icon { font-size: 2.2rem; margin-bottom: var(--space-2); display: block; }
.hero-card-label { font-weight: 600; font-size: 0.9rem; color: var(--color-text); }
.hero-card-desc { font-size: 0.8rem; color: var(--color-text-secondary); margin-top: 2px; }
.hero-card-wide .hero-card-icon { margin-bottom: 0; font-size: 1.5rem; }
.hero-card-wide .hero-card-text { text-align: left; }
.hero-card-wide .hero-card-label { font-size: 0.95rem; }
.hero-card-wide .hero-card-desc { margin-top: 0; }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Trust Bar ─── */
.trust-bar {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.trust-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.trust-label { color: var(--stone-400); font-size: 0.85rem; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; }
.trust-logos { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.trust-logo {
  font-weight: 600;
  color: var(--stone-600);
  font-size: 0.9rem;
  padding: var(--space-1) var(--space-3);
  background: var(--stone-50);
  border-radius: var(--radius-sm);
}
.trust-logo-dot { color: var(--stone-300); }

/* ─── Sections ─── */
.section { padding: var(--space-20) 0; }
.section-alt { background: var(--stone-50); }
.section-footer { text-align: center; margin-top: var(--space-12); }

/* ─── Product Grid ─── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}
.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-slow) var(--ease-out);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.product-card-cover {
  position: relative;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--stone-100);
}
.product-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}
.product-card:hover .product-card-cover img {
  transform: scale(1.03);
}
.product-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--amber-400);
  color: var(--stone-900);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.product-card-pages {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}
.product-card-body {
  padding: var(--space-5) var(--space-6) var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card-body h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.35;
}
.product-card-body p {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
  flex: 1;
}
.product-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-light);
}
.product-card-price { display: flex; align-items: center; gap: var(--space-2); }
.price-old {
  text-decoration: line-through;
  color: var(--color-text-tertiary);
  font-size: 0.85rem;
}
.price-current {
  font-weight: 700;
  color: var(--color-text);
  font-size: 1.1rem;
}
.product-card-category {
  background: var(--stone-100);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--stone-500);
  text-transform: capitalize;
}

/* ─── Categories ─── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: var(--space-4);
}
.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-normal) var(--ease-out);
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto var(--space-3);
  background: var(--stone-100);
}
.category-card:nth-child(1) .category-icon { background: var(--red-50); }
.category-card:nth-child(2) .category-icon { background: #fef3c7; }
.category-card:nth-child(3) .category-icon { background: #ecfdf5; }
.category-card:nth-child(4) .category-icon { background: #eff6ff; }
.category-card:nth-child(5) .category-icon { background: #faf5ff; }
.category-card h3 { font-size: 1rem; margin-bottom: var(--space-1); }
.category-count { color: var(--color-text-secondary); font-size: 0.85rem; }

/* ─── Why Section ─── */
.why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--space-6); }
.why-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}
.why-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.why-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: var(--space-5);
  background: var(--color-primary-light);
}
.why-card:nth-child(2) .why-icon { background: #fef3c7; }
.why-card:nth-child(3) .why-icon { background: #ecfdf5; }
.why-card:nth-child(4) .why-icon { background: #eff6ff; }
.why-card h3 { margin-bottom: var(--space-2); font-size: 1.1rem; }
.why-card p { color: var(--color-text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* ─── Free Guide CTA ─── */
.free-guide-section { padding: 60px 0; }
.free-guide-card {
  background: linear-gradient(135deg, var(--stone-900) 0%, var(--stone-800) 50%, #292524 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-16);
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.free-guide-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(220,38,38,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.free-guide-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.12);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: var(--space-5);
  color: #fff;
}
.free-guide-card h2 { color: #fff; margin-bottom: var(--space-3); }
.free-guide-card p {
  color: var(--stone-300);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1rem;
}
.free-guide-card .btn-white:hover { transform: translateY(-3px); }

/* ─── Testimonials ─── */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}
.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}
.testimonial-card:hover { box-shadow: var(--shadow-lg); }
.testimonial-stars {
  color: var(--amber-400);
  font-size: 1rem;
  margin-bottom: var(--space-4);
  letter-spacing: 2px;
}
.testimonial-text {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--space-6);
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}
.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--stone-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--stone-500);
}
.testimonial-name { font-weight: 600; font-size: 0.9rem; color: var(--color-text); }
.testimonial-role { font-size: 0.8rem; color: var(--color-text-secondary); }

/* ─── FAQ ─── */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--duration-normal);
}
.faq-item:hover { border-color: var(--stone-300); }
.faq-item.open { border-color: var(--color-primary); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) var(--space-6);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  text-align: left;
  transition: background var(--duration-fast);
}
.faq-question:hover { background: var(--stone-50); }
.faq-chevron {
  width: 20px;
  height: 20px;
  transition: transform var(--duration-normal) var(--ease-out);
  flex-shrink: 0;
  color: var(--stone-400);
}
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out), padding var(--duration-slow) var(--ease-out);
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 var(--space-6) var(--space-5);
}
.faq-answer p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ─── Product List (Home all products) ─── */
.product-list { display: flex; flex-direction: column; gap: var(--space-3); }
.product-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-normal) var(--ease-out);
}
.product-list-item:hover {
  border-color: var(--stone-300);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.product-list-cover {
  width: 56px;
  height: 70px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  overflow: hidden;
  background: var(--stone-100);
}
.product-list-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-list-info { flex: 1; min-width: 0; }
.product-list-info h3 {
  font-size: 0.95rem;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-list-info p {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-list-meta { text-align: right; flex-shrink: 0; }
.product-list-pages { display: block; color: var(--color-text-tertiary); font-size: 0.75rem; }
.product-list-price { font-weight: 700; font-size: 1rem; color: var(--color-text); }

/* ─── Product Detail ─── */
.product-detail { padding: var(--space-12) 0 var(--space-20); }
.product-detail-grid { display: grid; grid-template-columns: 380px 1fr; gap: var(--space-12); align-items: start; }
.product-detail-cover { position: sticky; top: calc(68px + var(--space-8)); }
.cover-big {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transition: transform var(--duration-slow) var(--ease-out);
}
.cover-big:hover { transform: scale(1.02); }
.cover-big img { width: 100%; display: block; }
.product-breadcrumb {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  color: var(--color-text-tertiary);
  font-size: 0.85rem;
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.product-breadcrumb a { color: var(--color-text-secondary); text-decoration: none; transition: color var(--duration-fast); }
.product-breadcrumb a:hover { color: var(--color-text); }
.product-detail-info h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: var(--space-2); }
.product-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-6);
  line-height: 1.5;
}
.product-pricing {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.price-current-big { font-size: 2.2rem; font-weight: 800; color: var(--color-text); }
.price-old-big { font-size: 1.1rem; }
.price-save {
  background: #dcfce7;
  color: var(--green-600);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}
.product-badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.product-badge-sm {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--stone-100);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--stone-600);
}
.product-description { margin-bottom: var(--space-6); }
.product-description p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  line-height: 1.75;
  font-size: 0.95rem;
}
.product-highlights {
  background: var(--stone-50);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}
.product-highlights h3 {
  font-size: 1rem;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.product-highlights ul { list-style: none; display: grid; gap: var(--space-2); }
.product-highlights li {
  padding: var(--space-2) 0 var(--space-2) 28px;
  position: relative;
  color: var(--stone-600);
  font-size: 0.9rem;
}
.product-highlights li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green-500);
  font-weight: 700;
  font-size: 1rem;
}
.product-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.tag {
  background: var(--stone-100);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  color: var(--stone-500);
  font-weight: 500;
}
.btn-buy {
  width: 100%;
  justify-content: center;
  padding: 18px;
  font-size: 1.1rem;
  margin-bottom: var(--space-3);
}
.payment-note {
  color: var(--color-text-tertiary);
  font-size: 0.82rem;
  text-align: center;
  margin-bottom: var(--space-6);
}
.preview-section {
  margin-top: var(--space-6);
  padding: var(--space-6);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}
.preview-section h3 { font-size: 1rem; margin-bottom: var(--space-2); }
.preview-section p { color: var(--color-text-secondary); font-size: 0.88rem; margin-bottom: var(--space-4); }

/* ─── Products Listing Page ─── */
.page-header {
  padding: var(--space-12) 0;
  background: linear-gradient(180deg, var(--stone-50) 0%, #fff 100%);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}
.page-header h1 { margin-bottom: var(--space-2); }
.page-header p { color: var(--color-text-secondary); font-size: 1.05rem; }
.filters { margin-bottom: var(--space-8); }
.filter-group { margin-bottom: var(--space-4); }
.filter-group:last-child { margin-bottom: 0; }
.filter-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-3);
  font-size: 0.85rem;
  color: var(--stone-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.filter-buttons { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.filter-btn {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  background: var(--stone-100);
  color: var(--stone-600);
  transition: all var(--duration-fast) var(--ease-out);
}
.filter-btn:hover { background: var(--stone-200); color: var(--color-text); }
.filter-btn.active { background: var(--color-text); color: #fff; }
.empty-state {
  text-align: center;
  padding: var(--space-16) 0;
}
.empty-state h3 { margin-bottom: var(--space-4); }

/* ─── Download Page ─── */
.download-page {
  display: flex;
  align-items: center;
  min-height: 60vh;
  padding: var(--space-12) 0;
}
.download-card {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-10);
  box-shadow: var(--shadow-lg);
}
.download-icon { font-size: 4rem; margin-bottom: var(--space-5); }
.download-card h1 { margin-bottom: var(--space-2); }
.download-subtitle { color: var(--color-text-secondary); margin-bottom: var(--space-6); font-size: 1rem; }
.download-product-name { font-weight: 700; font-size: 1rem; margin-bottom: var(--space-6); display: block; color: var(--color-text); }
.btn-download {
  width: 100%;
  justify-content: center;
  padding: 18px;
  font-size: 1.1rem;
  animation: pulse-glow 2s infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: var(--shadow-glow); }
  50% { box-shadow: 0 4px 30px rgba(220,38,38,0.45); }
}
.download-note { margin-top: var(--space-4); color: var(--color-text-tertiary); font-size: 0.85rem; }

/* ─── Error Page ─── */
.error-page {
  display: flex;
  align-items: center;
  min-height: 60vh;
  padding: var(--space-12) 0;
}
.error-card { text-align: center; max-width: 420px; margin: 0 auto; }
.error-code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--stone-200);
  line-height: 1;
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
}
.error-card h1 { margin-bottom: var(--space-2); }
.error-card p { color: var(--color-text-secondary); margin-bottom: var(--space-6); }

/* ─── Footer ─── */
.site-footer {
  background: var(--stone-900);
  color: var(--stone-300);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-20);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer-brand .logo-text { color: #fff; }
.footer-brand p {
  margin-top: var(--space-4);
  color: var(--stone-400);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  margin-bottom: var(--space-5);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.footer-col { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a {
  color: var(--stone-400);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--duration-fast);
}
.footer-col a:hover { color: #fff; }
.footer-newsletter p { font-size: 0.88rem; margin-bottom: var(--space-4); color: var(--stone-400); }
.footer-form { display: flex; gap: 0; }
.footer-form input {
  flex: 1;
  padding: 11px 16px;
  border: 1px solid var(--stone-700);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: var(--stone-800);
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--duration-fast);
}
.footer-form input:focus { border-color: var(--color-primary); }
.footer-form input::placeholder { color: var(--stone-500); }
.footer-form button {
  padding: 11px 20px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--duration-fast);
}
.footer-form button:hover { background: var(--color-primary-dark); }
.footer-form button:disabled { opacity: 0.6; cursor: not-allowed; }
.footer-bottom {
  border-top: 1px solid var(--stone-800);
  padding-top: var(--space-6);
  display: flex;
  justify-content: center;
  color: var(--stone-500);
  font-size: 0.82rem;
}

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--stone-900);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  z-index: 200;
  opacity: 0;
  transition: all var(--duration-slow) var(--ease-out);
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Animations on Scroll ─── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Stats / Counters ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}
.stat-card { text-align: center; }
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat-label { color: var(--color-text-secondary); font-size: 0.9rem; font-weight: 500; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .product-detail-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .product-detail-cover { position: static; max-width: 340px; }
  .hero .container { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-visual { max-width: 400px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --container-padding: 20px; }
  .hero { padding: var(--space-12) 0; }
  .hero-subtitle { font-size: 1rem; }
  .hero-visual { grid-template-columns: 1fr 1fr; }
  .hero-card:nth-child(4) { grid-column: 1 / -1; }
  .section { padding: var(--space-12) 0; }
  .product-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-number { font-size: 2rem; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .free-guide-card { padding: var(--space-8) var(--space-6); }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    flex-direction: column;
    gap: var(--space-1);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: var(--space-3) var(--space-4); font-size: 1rem; }
  .mobile-menu-btn { display: flex; }
  .product-detail-cover { max-width: 280px; margin: 0 auto; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; }
  .categories-grid { grid-template-columns: 1fr 1fr; }
  .download-card { padding: var(--space-8) var(--space-6); }
}