/* 翼省心AI - 设计系统公共样式 */
:root {
  --bg-primary: #030712;
  --bg-secondary: #0a0f1e;
  --bg-tertiary: #111827;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --border-color: #1f2937;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #374151;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #4b5563;
}

/* ===== Hero Backgrounds ===== */
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(168, 85, 247, 0.1), transparent),
    radial-gradient(ellipse 50% 30% at 20% 80%, rgba(59, 130, 246, 0.08), transparent);
  pointer-events: none;
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  pointer-events: none;
}
.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 70%);
}

/* ===== Gradient Text ===== */
.gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-blue {
  background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Glow Effects ===== */
.glow-blue {
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.3);
}
.glow-purple {
  box-shadow: 0 0 40px rgba(168, 85, 247, 0.3);
}

/* ===== Glass Card ===== */
.glass-card {
  background: rgba(17, 24, 39, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.glass-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(99, 102, 241, 0.1);
}

/* ===== Buttons ===== */
.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  color: white;
  padding: 14px 32px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: white;
  padding: 14px 32px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ===== Navigation ===== */
.nav-blur {
  background: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* ===== Section Divider ===== */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}

/* ===== Feature Icon Container ===== */
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.2));
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
}

/* ===== Status Tags ===== */
.status-live {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.2);
}
.status-dev {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.2);
}
.status-plan {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.2);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.animate {
  opacity: 0;
  transform: translateY(30px);
}
.reveal.animate.active {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Hero Animation ===== */
@keyframes heroFadeIn {
  from { opacity: 0.4; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-animate {
  animation: heroFadeIn 1s ease-out forwards;
}
.hero-animate-delay-1 { animation-delay: 0.2s; }
.hero-animate-delay-2 { animation-delay: 0.4s; }
.hero-animate-delay-3 { animation-delay: 0.6s; }

/* ===== Floating Elements ===== */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}
.floating {
  animation: float 6s ease-in-out infinite;
}
.floating-delay-1 { animation-delay: -2s; }
.floating-delay-2 { animation-delay: -4s; }

/* ===== Product Card ===== */
.product-card {
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.5), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.product-card:hover::before {
  opacity: 1;
}

/* ===== Solution Card ===== */
.solution-card {
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.8), rgba(17, 24, 39, 0.4));
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.4s ease;
}
.solution-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
}

/* ===== CTA Section ===== */
.cta-bg {
  background:
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(99, 102, 241, 0.15), transparent),
    linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
}

/* ===== Particle Canvas ===== */
#particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.4;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  transform: translateX(100%);
  transition: transform 0.3s ease;
}
.mobile-menu.open {
  transform: translateX(0);
}

/* ===== Counter ===== */
.counter-value {
  font-variant-numeric: tabular-nums;
}

/* ===== Tab Active ===== */
.tab-active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.2));
  border-color: rgba(99, 102, 241, 0.4);
  color: white;
}

/* ===== Gradient Border ===== */
.gradient-border {
  position: relative;
  background: var(--bg-secondary);
  border-radius: 16px;
}
.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(168, 85, 247, 0.3));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ===== Pain-Solution Card ===== */
.pain-solution-card {
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.9), rgba(17, 24, 39, 0.5));
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}
.pain-solution-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.pain-solution-card .pain-side {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== Value Pill ===== */
.value-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}

/* ===== Tab Button ===== */
.tab-btn {
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}
.tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}
.tab-btn.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.2));
  border-color: rgba(99, 102, 241, 0.4);
  color: white;
}

/* ===== Tab Content ===== */
.tab-content {
  display: none;
  animation: tabFadeIn 0.4s ease forwards;
}
.tab-content.active {
  display: block;
}
@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Case Card ===== */
.case-card {
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.4s ease;
}
.case-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
}

/* ===== Logo Pill ===== */
.logo-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.3s ease;
}
.logo-pill:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(99, 102, 241, 0.2);
  color: var(--text-primary);
}

/* ===== Tier Feature List ===== */
.tier-feature-list {
  list-style: none;
  padding: 0;
}
.tier-feature-list li {
  position: relative;
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.tier-feature-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #60a5fa;
  font-weight: 600;
}
.tier-feature-list li:last-child {
  border-bottom: none;
}

/* ===== Stat Item ===== */
.stat-item {
  text-align: center;
  padding: 16px;
}
.stat-item .stat-number {
  font-size: 2rem;
  font-weight: 800;
}
.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Dark Section ===== */
.dark-section {
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary), var(--bg-primary));
}

/* ===== Utility Classes ===== */
.text-balance {
  text-wrap: balance;
}

@media (max-width: 768px) {
  .stat-item .stat-number {
    font-size: 1.5rem;
  }
}