/**
 * 招个AI 品牌官网 Design System V4
 * Light-first · Professional · Inter + CJK
 * Stitch MCP Design: assets/13329519179342465212
 * 更新：2026-06-08
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0&display=swap');

:root {
  --primary: #2563EB;
  --primary-light: #3B82F6;
  --primary-lighter: #60A5FA;
  --primary-dark: #1D4ED8;
  --primary-deep: #1E3A5F;
  --secondary: #06B6D4;
  
  --gradient-primary: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  --gradient-hero: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 50%, #F0F9FF 100%);
  --gradient-cta: linear-gradient(135deg, #1E3A5F 0%, #1D4ED8 50%, #2563EB 100%);
  
  --bg-page: #F8FAFC;
  --bg-white: #FFFFFF;
  --bg-light: #F1F5F9;
  --bg-card: #FFFFFF;
  
  --text-heading: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --text-white: #FFFFFF;
  
  --border: #E2E8F0;
  --border-hover: #CBD5E1;
  
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.03);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --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;
  
  --content-max: 1280px;
  --content-padding: 24px;
  --navbar-height: 72px;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset === */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: Inter, "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-body);
  background: var(--bg-page);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
}

/* === Layout === */

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

.section { padding: var(--space-20) 0; position: relative; }
.section-light { background: var(--bg-page); }
.section-white { background: var(--bg-white); }
.section-alt { background: #F1F5F9; }

/* === Navbar === */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition-base);
}

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

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

.navbar-brand { display: flex; align-items: center; gap: 10px; }
.navbar-logo { height: 36px; width: auto; }

.navbar-nav { display: flex; align-items: center; gap: var(--space-8); }

.navbar-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-fast);
}
.navbar-link:hover { color: var(--text-heading); }
.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}
.navbar-link:hover::after { width: 100%; }

.navbar-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-heading);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.navbar-hamburger:hover { background: var(--bg-light); }

.navbar-backdrop { display: none; }

/* === Buttons === */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 1px 3px rgba(37,99,235,0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(37,99,235,0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--text-heading);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  background: #F8FAFC;
  border-color: var(--border-hover);
}

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

.btn-ghost {
  background: transparent;
  color: white;
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-pill { border-radius: var(--radius-full); }

/* === Hero === */

.hero {
  min-height: 100vh;
  padding-top: var(--navbar-height);
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-12) var(--content-padding);
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(37,99,235,0.06);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-badge-text { font-weight: 600; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.12;
  color: var(--text-heading);
  margin-bottom: var(--space-5);
  letter-spacing: -0.025em;
}

.hero-title span {
  background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.hero-buttons { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.hero-stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.2;
}
.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.hero-visual { position: relative; }

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 60px -12px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.04);
}
.hero-image { width: 100%; height: auto; display: block; }

.hero-float-card {
  position: absolute;
  background: white;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-heading);
  white-space: nowrap;
}
.hero-float-card .material-symbols-outlined { font-size: 20px; color: var(--success); }
.hero-float-top { top: 12%; right: -20px; }
.hero-float-bottom { bottom: 16%; left: -24px; }

/* === Platform Integration (ribbon) === */

.platform-ribbon {
  padding: var(--space-12) 0;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.platform-ribbon-label {
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.platform-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-10);
  flex-wrap: wrap;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-body);
  transition: color var(--transition-fast);
}
.platform-item:hover { color: var(--primary); }

.platform-icon-circle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  transition: background var(--transition-fast);
}
.platform-item:hover .platform-icon-circle { background: rgba(37,99,235,0.08); }

/* === Section Header === */

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-16);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(37,99,235,0.07);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}

.section-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-heading);
  margin-bottom: var(--space-4);
  letter-spacing: -0.015em;
}

.section-desc {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* === Enterprise Solutions (3 cards) === */

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.solution-card:hover {
  border-color: rgba(37,99,235,0.2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.solution-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(37,99,235,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}
.solution-icon .material-symbols-outlined { font-size: 26px; color: var(--primary); }

.solution-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-3);
}
.solution-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* === Features Grid (6 AI roles) === */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-base);
}
.feature-card:hover {
  border-color: rgba(37,99,235,0.2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(37,99,235,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}
.feature-icon .material-symbols-outlined { font-size: 26px; color: var(--primary); }
.feature-icon svg { width: 26px; height: 26px; color: var(--primary); }

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-2);
}
.feature-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* === AI Models Row === */

.models-section { background: var(--bg-white); }

.models-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-10);
  flex-wrap: wrap;
  margin-top: var(--space-8);
}

.model-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-heading);
  transition: all var(--transition-fast);
}
.model-chip:hover {
  border-color: var(--primary);
  background: rgba(37,99,235,0.04);
}

.model-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: white;
}

/* === Pricing === */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  max-width: 1060px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  position: relative;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}
.pricing-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), var(--shadow-lg);
}
.pricing-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-header {
  text-align: center;
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.pricing-icon {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-3);
}
.pricing-icon .material-symbols-outlined { font-size: 32px; color: var(--primary); }

.pricing-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-2);
}

.pricing-price {
  font-size: 42px;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1;
}
.pricing-price span {
  font-size: 15px;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

.pricing-features {
  flex: 1;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.5;
}
.pricing-feature .material-symbols-outlined {
  font-size: 18px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-action { text-align: center; }
.pricing-action .btn { width: 100%; }

/* === Why Choose Us === */

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-base);
}
.why-card:hover {
  border-color: rgba(37,99,235,0.2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.why-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(37,99,235,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
}
.why-icon .material-symbols-outlined { font-size: 30px; color: var(--primary); }

.why-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-3);
}
.why-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* === Process Steps === */

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.process-connector {
  display: none;
}

@media (min-width: 769px) {
  .process-connector {
    display: block;
    position: absolute;
    top: 56px;
    left: calc(33.33% + 8px);
    right: calc(33.33% + 8px);
    height: 2px;
    background: var(--border);
  }
  .process-connector::before,
  .process-connector::after {
    content: '';
    position: absolute;
    top: -4px;
    width: 10px;
    height: 10px;
    border-top: 2px solid var(--primary);
    border-right: 2px solid var(--primary);
    transform: rotate(45deg);
  }
  .process-connector::before { left: -2px; }
  .process-connector::after { right: -2px; }
}

.process-step {
  text-align: center;
  padding: var(--space-8) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}
.process-step:hover {
  border-color: rgba(37,99,235,0.2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.process-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.process-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-2);
}

.process-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* === CTA Section === */

.cta-section {
  background: var(--gradient-cta);
  padding: var(--space-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  right: -50%;
  bottom: -50%;
  background: radial-gradient(ellipse at center, rgba(96,165,250,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.cta-title {
  font-size: 38px;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.cta-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* === Footer === */

.footer {
  background: #0F172A;
  color: rgba(255,255,255,0.6);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand { max-width: 280px; }
.footer-logo { height: 36px; margin-bottom: var(--space-4); filter: brightness(0) invert(1); }
.footer-brand-text { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.5); }

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-4);
  letter-spacing: 0.03em;
}

.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }

.footer-link {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}
.footer-link:hover { color: rgba(255,255,255,0.9); }

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-copyright a { color: rgba(255,255,255,0.4); text-decoration: underline; }
.footer-copyright a:hover { color: rgba(255,255,255,0.7); }

.footer-legal {
  display: flex;
  gap: var(--space-6);
}
.footer-legal a {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}
.footer-legal a:hover { color: rgba(255,255,255,0.7); }

/* === Stats Row === */

.stats-ribbon {
  padding: var(--space-16) 0;
  background: var(--bg-white);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* === Responsive: Tablet === */

@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-10); text-align: center; }
  .hero-content { max-width: 100%; }
  .hero-title { font-size: 42px; }
  .hero-stats { justify-content: center; }
  .hero-visual { order: -1; max-width: 560px; margin: 0 auto; }
  .hero-float-card { display: none; }
  .hero-buttons { justify-content: center; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr 1fr; max-width: 720px; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

/* === Responsive: Mobile === */

@media (max-width: 768px) {
  :root {
    --navbar-height: 64px;
    --content-padding: 16px;
  }

  .navbar-hamburger { display: flex; }
  .navbar-nav {
    display: none;
    position: fixed;
    top: var(--navbar-height);
    right: 0;
    bottom: 0;
    width: min(300px, 85vw);
    background: white;
    flex-direction: column;
    padding: var(--space-6) var(--space-5);
    gap: var(--space-1);
    z-index: 200;
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    overflow-y: auto;
    border-left: 1px solid var(--border);
  }
  .navbar-nav.nav-open { display: flex; }
  .navbar-nav .navbar-link,
  .navbar-nav .btn { width: 100%; padding: 12px 16px; border-radius: 8px; text-align: left; }
  .navbar-backdrop.active {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 199;
  }

  .hero { min-height: auto; padding-top: calc(var(--navbar-height) + 32px); padding-bottom: 48px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: var(--space-4); align-items: center; }

  .section { padding: var(--space-16) 0; }
  .section-title { font-size: 28px; }
  .section-desc { font-size: 15px; }
  .section-header { margin-bottom: var(--space-10); }

  .features-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .pricing-card.featured { transform: none; }
  .why-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: var(--space-4); }

  .platform-row { gap: var(--space-4); }
  .platform-item span:last-child { display: none; }
  .models-row { gap: var(--space-3); }

  .cta-title { font-size: 28px; }
  .cta-buttons { flex-direction: column; align-items: center; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-brand { max-width: 100%; text-align: center; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .stats-row { grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
  .stat-value { font-size: 28px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .section-title { font-size: 24px; }
  .pricing-card { padding: var(--space-6) var(--space-4); }
  .platform-row { gap: var(--space-3); }
  .platform-icon-circle { width: 40px; height: 40px; }
}

/* === Animations === */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in { animation: fadeInUp 0.5s ease-out forwards; }

/* === Subpage Styles === */

.page-header {
  padding: calc(var(--navbar-height) + 48px) 0 48px;
  background: var(--bg-page);
  text-align: center;
}
.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-3);
}
.page-header p {
  font-size: 17px;
  color: var(--text-muted);
}

.page-content {
  padding: var(--space-16) 0;
}

.page-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-heading);
  margin: var(--space-8) 0 var(--space-4);
}

.page-content p, .page-content li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: var(--space-4);
}

.page-content ul { padding-left: var(--space-6); }

/* Form styles (login/register/contact) */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  max-width: 440px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}

.form-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-heading);
  text-align: center;
  margin-bottom: var(--space-8);
}

.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-white);
  color: var(--text-heading);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-input::placeholder { color: var(--text-light); }

.form-submit { width: 100%; margin-top: var(--space-2); }

.form-footer {
  text-align: center;
  margin-top: var(--space-5);
  font-size: 14px;
  color: var(--text-muted);
}
.form-footer a { color: var(--primary); font-weight: 600; }
.form-footer a:hover { text-decoration: underline; }

/* legacy compat */
.solutions-list { display: contents; }
.solution-item { display: contents; }
.section-dark { background: var(--gradient-cta); color: white; }
.section-dark .section-title { color: white; }
.section-dark .section-desc { color: rgba(255,255,255,0.8); }