/* {{RIPER-5:
   Action: "Added"
   Task_ID: "#1"
   Timestamp: "2026-01-18"
   Authoring_Role: "LD"
   Principle_Applied: "Aether-Design-Liquid-Glass, Aether-Design-Universal-Softness, Aether-Engineering-DRY"
   Quality_Check: "遵循以太设计哲学的完整样式系统"
}} */

/* ============================================
   AETHER DESIGN SYSTEM - LIQUID GLASS
   PatchPilot.tech - DevSecOps Auto-Patching
   ============================================ */

:root {
  /* Color Palette - DevSecOps Theme */
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  
  --secondary-500: #8b5cf6;
  --secondary-600: #7c3aed;
  
  --success-500: #10b981;
  --success-600: #059669;
  
  --warning-500: #f59e0b;
  --danger-500: #ef4444;
  
  --glass-light: rgba(255, 255, 255, 0.1);
  --glass-medium: rgba(255, 255, 255, 0.15);
  --glass-dark: rgba(0, 0, 0, 0.2);
  
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  
  /* Border Radius - Universal Softness */
  --radius-xl: 1rem;      /* rounded-2xl - primary radius */
  --radius-full: 9999px;  /* rounded-full - circular elements */
  
  /* Shadows - Depth System */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 24px rgba(99, 102, 241, 0.3);
  
  /* Animation Curves - Fluid Physics */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-back: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   BASE RESET & TYPOGRAPHY
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #1e293b 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   GLASS COMPONENTS - Core Aether Philosophy
   ============================================ */

.glass {
  background: var(--glass-light);
  backdrop-filter: blur(20px) saturate(150%) brightness(110%);
  -webkit-backdrop-filter: blur(20px) saturate(150%) brightness(110%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-md);
}

.glass-strong {
  background: var(--glass-medium);
  backdrop-filter: blur(30px) saturate(180%) brightness(120%);
  -webkit-backdrop-filter: blur(30px) saturate(180%) brightness(120%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   NAVIGATION - Floating Glass Navbar
   ============================================ */

.navbar {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: 90%;
  max-width: 1200px;
  padding: 1rem 2rem;
  border-radius: var(--radius-xl);
  animation: slideDown 0.6s var(--ease-out-expo);
}

@keyframes slideDown {
  from {
    transform: translate(-50%, -100%);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: transform 0.3s var(--ease-out-expo);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  list-style: none;
}

.nav-links a {
  padding: 0.625rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-xl);
  transition: all 0.3s var(--ease-out-expo);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 0 20px rgba(99, 102, 241, 0.2);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ============================================
   BUTTONS - Universal Softness
   ============================================ */

.btn {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s var(--ease-out-expo);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s var(--ease-out-expo), height 0.6s var(--ease-out-expo);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--glass-light);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--glass-medium);
  transform: translateY(-2px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  border-radius: var(--radius-full);
  animation: float 8s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(5deg); }
}

.hero-content {
  max-width: 1200px;
  text-align: center;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--glass-light);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s both;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s both;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.5rem;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.6s both;
}

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

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.8s both;
}

/* ============================================
   FEATURE CARDS - Glass Lens Effect
   ============================================ */

.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  border-radius: var(--radius-xl);
  transition: all 0.4s var(--ease-out-expo);
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.3);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  border-radius: var(--radius-xl);
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.2);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   PRICING CARDS
   ============================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary-500);
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.4);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  margin: 1rem 0;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-price span {
  font-size: 1.25rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin: 2rem 0;
  text-align: left;
}

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--success-500);
  font-weight: 700;
  font-size: 1.25rem;
}

/* ============================================
   CODE BLOCK - Aether Style
   ============================================ */

.code-block {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  overflow-x: auto;
  font-family: 'Fira Code', 'Courier New', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.5rem 0;
}

.code-block pre {
  margin: 0;
  color: #e5e7eb;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: var(--glass-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem 2rem 1.5rem;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--primary-500);
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.social-link {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-light);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.3s var(--ease-out-expo);
}

.social-link:hover {
  background: var(--primary-500);
  transform: translateY(-3px);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  .navbar {
    width: 95%;
    padding: 1rem 1.5rem;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--glass-strong);
    margin-top: 1rem;
    border-radius: var(--radius-xl);
    padding: 1rem;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero {
    padding: 7rem 1.5rem 3rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: 3rem 1.5rem;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

.text-gradient {
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  background: var(--glass-light);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success-500);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: var(--warning-500);
}

/* Scroll Animations */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s var(--ease-out-expo);
}

.scroll-reveal.active {
  opacity: 1;
  transform: translateY(0);
}