/* ================================
   麟听科技 - 全局样式
   ================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand Colors */
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #4834D4;
  --accent: #00CEC9;
  --accent-light: #55EFC4;
  --accent-dark: #00B894;

  /* Neutral Colors */
  --bg: #0A0A0F;
  --bg-card: #14141F;
  --bg-card-hover: #1A1A2E;
  --bg-elevated: #1E1E30;
  --text: #F5F5F7;
  --text-secondary: #A0A0B8;
  --text-muted: #6B6B80;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6C5CE7 0%, #00CEC9 100%);
  --gradient-hero: radial-gradient(ellipse at top, rgba(108, 92, 231, 0.15) 0%, transparent 60%),
                   radial-gradient(ellipse at bottom right, rgba(0, 206, 201, 0.1) 0%, transparent 60%);
  --gradient-text: linear-gradient(135deg, #A29BFE 0%, #55EFC4 100%);
  --gradient-card: linear-gradient(145deg, rgba(108, 92, 231, 0.08) 0%, rgba(0, 206, 201, 0.05) 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.15);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;
}

/* ---------- Reset ---------- */
*, *::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', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

/* ---------- Utility ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: var(--space-xl) 0;
  position: relative;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.text-center {
  text-align: center;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: white;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.4);
}

.nav-logo .logo-en {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 0.3rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white !important;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

.nav-cta::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.12) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  right: 15%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 206, 201, 0.08) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(108, 92, 231, 0.1);
  border: 1px solid rgba(108, 92, 231, 0.2);
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: var(--space-md);
  backdrop-filter: blur(10px);
}

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

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.hero h1 .gradient-text {
  display: inline-block;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(108, 92, 231, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-large {
  padding: 1rem 2.4rem;
  font-size: 1.1rem;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.card-link svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.platform-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ---------- Product Cards ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

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

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

.product-card .card-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.product-card .card-badge svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.product-card .card-badge.hot {
  background: rgba(255, 107, 107, 0.15);
  color: #FF6B6B;
}

.product-card .card-badge.new {
  background: rgba(0, 206, 201, 0.15);
  color: var(--accent);
}

.product-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  color: var(--primary-light);
}

.product-card .card-icon svg {
  width: 24px;
  height: 24px;
}

.product-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.product-card .card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.product-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.product-card .card-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.product-card .card-tag svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.product-card .card-link {
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: var(--transition);
}

.product-card .card-link:hover {
  gap: 0.6rem;
  color: var(--accent);
}

/* ---------- Contact Section ---------- */
.contact-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.contact-card {
  text-align: center;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.contact-card .contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
}

.contact-card .contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.contact-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-card a {
  color: var(--primary-light);
}

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

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid var(--border);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ---------- Product Page Styles ---------- */
.product-hero {
  padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-xl);
  text-align: center;
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
}

.product-hero::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.1) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.product-hero .hero-content {
  position: relative;
  z-index: 1;
}

.product-logo-wrapper {
  width: 128px;
  height: 128px;
  margin: 0 auto var(--space-md);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-logo-wrapper::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: calc(var(--radius-xl) + 4px);
  background: var(--gradient-primary);
  opacity: 0.6;
  filter: blur(12px);
  z-index: 0;
  animation: pulse-glow 3s ease-in-out infinite;
}

.product-logo-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  padding: 2px;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  z-index: 1;
}

.product-logo {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-xl);
  position: relative;
  z-index: 2;
  box-shadow: 0 12px 40px rgba(108, 92, 231, 0.3),
              inset 0 1px 0 rgba(255, 255, 255, 0.1);
  animation: float 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.7; }
}

.product-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.product-hero .product-tagline {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.product-hero .product-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto var(--space-lg);
}

.platform-badges {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.platform-badge:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  color: var(--primary-light);
}

.feature-card .feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Tech Stack */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.tech-item {
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.tech-item:hover {
  border-color: var(--primary);
  color: var(--text);
  background: var(--bg-card-hover);
}

/* CTA Section */
.cta-section {
  text-align: center;
  padding: var(--space-xl) 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.cta-section h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.cta-section p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

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

.cta-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---------- Legal Page ---------- */
.legal-content {
  padding: calc(var(--nav-height) + var(--space-lg)) 0 var(--space-xl);
}

.legal-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.legal-content .last-updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
}

.legal-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: var(--space-lg) 0 var(--space-sm);
}

.legal-content p {
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.legal-content ul {
  margin-bottom: var(--space-sm);
  padding-left: var(--space-md);
}

.legal-content ul li {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.7;
  list-style: disc;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

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

  .product-hero h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

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

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
    padding: 0 var(--space-md);
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
    padding: 0 var(--space-md);
  }

  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .section {
    padding: var(--space-lg) 0;
  }

  .product-card {
    padding: var(--space-md);
  }
}