/* 全局变量 */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --dark-gradient: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, 'Noto Sans SC', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--dark-gradient);
  overflow-x: hidden;
  will-change: transform;
}

/* 动态背景 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(79, 172, 254, 0.2) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all 0.3s;
  contain: layout style;
}

.navbar-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: transform 0.3s;
}

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

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.5));
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a:not(.btn-download-nav) {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s;
  font-weight: 500;
  font-size: 1rem;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a:not(.btn-download-nav):hover {
  color: var(--text-primary);
  text-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

.nav-links a:not(.btn-download-nav)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.3s;
}

.nav-links a:not(.btn-download-nav):hover::after {
  width: 100%;
}

.btn-download-nav {
  background: var(--primary-gradient);
  color: white;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-download-nav:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
  will-change: transform;
}

/* 动态粒子 */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  animation: pulse 4s ease-in-out infinite;
  will-change: transform, opacity;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.hero-content {
  text-align: center;
  max-width: 900px;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2rem;
  animation: float 3s ease-in-out infinite;
  will-change: transform;
}

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

.hero h1 {
  font-size: 5rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(102, 126, 234, 0.3);
}

.hero h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  line-height: 1.8;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-hero-primary {
  background: var(--primary-gradient);
  color: white;
  padding: 1.25rem 3rem;
  border-radius: 50px;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
  border: none;
  cursor: pointer;
}

.btn-hero-primary:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

.btn-hero-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--glass-border);
  color: white;
  padding: 1.25rem 3rem;
  border-radius: 50px;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s;
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-5px);
}

/* Features Section */
.features {
  padding: 8rem 0;
  position: relative;
}

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

.section-title h2 {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title p {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  padding: 3rem 2rem;
  border-radius: 24px;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
  will-change: transform;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.4s;
  z-index: 0;
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: rgba(102, 126, 234, 0.5);
}

.feature-card:hover::before {
  opacity: 0.1;
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--glass-border);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: all 0.4s;
  position: relative;
  z-index: 1;
}

.feature-icon svg {
  width: 40px;
  height: 40px;
  color: #667eea;
}

.feature-card:hover .feature-icon {
  background: var(--primary-gradient);
  border-color: transparent;
  transform: rotate(5deg) scale(1.1);
}

.feature-card:hover .feature-icon svg {
  color: white;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* Pricing Section */
.pricing {
  padding: 8rem 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.pricing-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 2px solid var(--glass-border);
  padding: 3rem 2rem;
  border-radius: 24px;
  transition: all 0.4s;
  position: relative;
  will-change: transform;
}

.pricing-card:hover {
  transform: translateY(-10px);
  border-color: rgba(102, 126, 234, 0.5);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.pricing-card.featured {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.1);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-10px);
}

.pricing-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--secondary-gradient);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
}

.pricing-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.pricing-price {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.pricing-period {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

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

.pricing-features li svg {
  width: 24px;
  height: 24px;
  color: #667eea;
  flex-shrink: 0;
}

.btn-pricing {
  display: block;
  width: 100%;
  padding: 1.25rem;
  background: var(--primary-gradient);
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 700;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-pricing:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.5);
}

.pricing-card.featured .btn-pricing {
  background: var(--secondary-gradient);
}

/* Download Section */
.download {
  padding: 8rem 0;
  position: relative;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.download-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 2px solid var(--glass-border);
  padding: 2.5rem 1.5rem;
  border-radius: 24px;
  text-align: center;
  transition: all 0.4s;
  will-change: transform;
}

.download-card:hover {
  transform: translateY(-10px);
  border-color: rgba(102, 126, 234, 0.5);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.download-icon {
  width: 80px;
  height: 80px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--glass-border);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  transition: all 0.4s;
}

.download-icon svg {
  width: 40px;
  height: 40px;
  color: #667eea;
}

.download-card:hover .download-icon {
  background: var(--primary-gradient);
  border-color: transparent;
  transform: scale(1.1);
}

.download-card:hover .download-icon svg {
  color: white;
}

.download-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.download-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.btn-download-card {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: transparent;
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 700;
  border: 2px solid var(--glass-border);
  transition: all 0.3s;
}

.btn-download-card:hover {
  background: var(--primary-gradient);
  border-color: transparent;
}

/* CTA Section */
.cta {
  padding: 8rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0.1;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px);
  padding: 5rem 0 2rem;
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  padding: 0 2rem;
  margin-bottom: 3rem;
}

.footer h3 {
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.footer ul {
  list-style: none;
}

.footer li {
  padding: 0.625rem 0;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0 2rem;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  opacity: 0.8;
}

/* Selection */
::selection {
  background: rgba(102, 126, 234, 0.3);
  color: white;
}

/* Responsive */
@media (max-width: 1200px) {
  .hero h1 {
    font-size: 4rem;
  }
}

@media (max-width: 768px) {
  .navbar-content {
    padding: 0 1rem;
    height: 70px;
  }

  .nav-links {
    gap: 1rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.125rem;
  }

  .section-title h2 {
    font-size: 2.5rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-10px);
  }

  .download-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 0 1rem;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

  .cta h2 {
    font-size: 2rem;
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .nav-links a:not(.btn-download-nav) {
    display: none;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
  }
}