/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 科技风格配色 */
  --primary-color: #00d4ff;
  --primary-dark: #0099cc;
  --primary-light: #33ddff;
  --secondary-color: #7c3aed;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  
  /* 文字颜色 */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-light: #ffffff;
  
  /* 背景颜色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #0f172a;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.1);
  
  /* 边框和阴影 */
  --border-color: #e2e8f0;
  --border-glow: rgba(0, 212, 255, 0.3);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
  --shadow-glow-purple: 0 0 20px rgba(124, 58, 237, 0.3);
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-tech: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --gradient-card: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  
  /* 过渡动画 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.7;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(90deg, transparent 79px, rgba(0, 212, 255, 0.03) 81px, rgba(0, 212, 255, 0.03) 82px, transparent 84px),
    linear-gradient(rgba(0, 212, 255, 0.03) 79px, transparent 81px);
  background-size: 100px 100px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05), 0 4px 16px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 212, 255, 0.1);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.brand-name {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  letter-spacing: -0.5px;
  position: relative;
}

.brand-name::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-tech);
  opacity: 0;
  transition: var(--transition);
}

.nav-brand:hover .brand-name::after {
  opacity: 1;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-tech);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

.nav-toggle,
#nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span,
#nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero区域 */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
  overflow: hidden;
  background: var(--gradient-dark);
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
  z-index: -1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(90deg, transparent 79px, rgba(0, 212, 255, 0.05) 81px, rgba(0, 212, 255, 0.05) 82px, transparent 84px),
    linear-gradient(rgba(0, 212, 255, 0.05) 79px, transparent 81px);
  background-size: 100px 100px;
  animation: gridMove 20s linear infinite;
  z-index: -1;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(100px, 100px);
  }
}

.hero-background {
  display: none;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #00d4ff 0%, #7c3aed 50%, #00d4ff 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: -2px;
  animation: gradientShift 5s ease infinite;
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero-subtitle {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.hero-description {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-tech);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.4);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}

/* 通用区块样式 */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -1px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-tech);
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: 1.5rem;
}

/* 功能特性 */
.features {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
}

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

.feature-card {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  text-align: center;
  border: 1px solid rgba(0, 212, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-tech);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 4px 8px rgba(0, 212, 255, 0.2));
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
  filter: drop-shadow(0 8px 16px rgba(0, 212, 255, 0.3));
}

.feature-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1rem;
}

/* 产品截图 */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

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

.screenshot-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-bottom: 1rem;
  background: var(--bg-secondary);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.screenshot-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 1.5rem;
  font-weight: 600;
}

.screenshot-caption {
  color: var(--text-secondary);
  font-weight: 500;
}

/* 下载区域 */
.download {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  position: relative;
}

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

.download-card {
  background: rgba(255, 255, 255, 0.95);
  padding: 3rem;
  border-radius: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(0, 212, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-tech);
  transform: scaleX(0);
  transition: var(--transition);
}

.download-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.download-card:hover::before {
  transform: scaleX(1);
}

.download-icon {
  font-size: 4.5rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 4px 8px rgba(0, 212, 255, 0.2));
  transition: var(--transition);
}

.download-card:hover .download-icon {
  transform: scale(1.1) rotate(5deg);
  filter: drop-shadow(0 8px 16px rgba(0, 212, 255, 0.3));
}

.download-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.download-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.download-info {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.version,
.size {
  padding: 0.6rem 1.2rem;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.btn-download {
  width: 100%;
}

.download-notes {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: 8px;
  color: var(--text-secondary);
}

/* 关于我们 */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-text p {
  margin-bottom: 1.5rem;
}

.about-features {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.about-feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: 6px;
}

.check-icon {
  color: var(--secondary-color);
  font-weight: 700;
  font-size: 1.2rem;
}

/* 页脚 */
.footer {
  background: var(--gradient-dark);
  color: white;
  padding: 4rem 0 2rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-tech);
  opacity: 0.3;
}

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

.footer-section h4 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.footer-links a::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-tech);
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

.footer-links a:hover::before {
  width: 100%;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  position: relative;
}

.footer-bottom::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 1px;
  background: var(--gradient-tech);
  opacity: 0.5;
}

.footer-license {
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    transition: var(--transition);
    border-top: 1px solid rgba(0, 212, 255, 0.1);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle,
  #nav-toggle {
    display: flex;
  }

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

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

  .nav-toggle.active span:nth-child(3),
  #nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-title {
    font-size: 2.5rem;
    letter-spacing: -1px;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

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

  .section-title {
    font-size: 2rem;
  }

  .section-title::after {
    width: 40px;
  }

  .page-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-item {
    padding: 1rem;
  }

  .features-grid,
  .screenshots-grid,
  .download-content,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
    letter-spacing: -0.5px;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .btn {
    width: 100%;
    padding: 1rem 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .page-title {
    font-size: 2rem;
  }

  .cta-content h2 {
    font-size: 1.75rem;
  }

  .feature-card,
  .preview-card,
  .download-card {
    padding: 2rem;
  }
}

/* 页面标题区域 */
.page-header {
  padding: 140px 0 80px;
  background: var(--gradient-dark);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.2) 0%, transparent 50%);
  animation: pulse 6s ease-in-out infinite;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.page-subtitle {
  font-size: 1.3rem;
  opacity: 0.9;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 400;
}

/* 快速预览区域 */
.quick-preview {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
}

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

.preview-card {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(0, 212, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.preview-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition-slow);
}

.preview-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.preview-card:hover::after {
  opacity: 1;
}

.preview-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.preview-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.preview-card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.preview-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.preview-link:hover {
  color: var(--primary-dark);
}

.preview-cta {
  text-align: center;
  margin-top: 2rem;
}

/* 功能详情页面 */
.features-detail {
  padding: 3rem 0;
}

.feature-list {
  list-style: none;
  margin-top: 1rem;
  text-align: left;
}

.feature-list li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.feature-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* 高级功能 */
.advanced-features {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  position: relative;
}

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.advanced-item {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}

.advanced-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.advanced-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.advanced-item h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.advanced-item p {
  color: var(--text-secondary);
}

/* 应用场景 */
.use-cases {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.case-card {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  transition: var(--transition);
  border: 1px solid rgba(0, 212, 255, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.case-card:hover {
  background: white;
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
}

.case-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.case-card p {
  color: var(--text-secondary);
}

/* CTA区域 */
.cta-section {
  padding: 6rem 0;
  background: var(--gradient-dark);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.2) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 800;
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.cta-content p {
  font-size: 1.3rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  color: rgba(255, 255, 255, 0.8);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
  display: block;
  text-align: center;
}

/* 定价页面 */
.pricing {
  padding: 3rem 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid rgba(0, 212, 255, 0.2);
  border-radius: 24px;
  padding: 3rem;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-tech);
  transform: scaleX(0);
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2), 0 0 0 1px rgba(0, 212, 255, 0.3);
  transform: translateY(-8px);
}

.pricing-card:hover::before {
  transform: scaleX(1);
}

.pricing-card.featured {
  border-color: var(--primary-color);
  box-shadow: 0 16px 48px rgba(0, 212, 255, 0.25), 0 0 0 2px rgba(0, 212, 255, 0.3);
  transform: scale(1.05);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 248, 255, 0.98) 100%);
}

.pricing-card.featured::before {
  transform: scaleX(1);
}

.pricing-badge {
  position: absolute;
  top: -15px;
  right: 20px;
  background: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: 2rem;
}

.pricing-title {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.pricing-price {
  margin-bottom: 1rem;
}

.price-currency {
  font-size: 1.5rem;
  vertical-align: top;
}

.price-amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-color);
}

.price-period {
  font-size: 1rem;
  color: var(--text-secondary);
}

.pricing-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--bg-secondary);
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* 功能对比表格 */
.comparison {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.comparison-table {
  overflow-x: auto;
  margin-top: 2rem;
}

.comparison-table table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.comparison-table th,
.comparison-table td {
  padding: 1.25rem;
  text-align: left;
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.comparison-table th {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
  letter-spacing: 0.3px;
}

.comparison-table th:first-child {
  border-top-left-radius: 16px;
}

.comparison-table th:last-child {
  border-top-right-radius: 16px;
}

.comparison-table th:first-child {
  width: 30%;
}

.comparison-table td {
  text-align: center;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* FAQ */
.faq {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(255, 255, 255, 0.95);
  padding: 2rem;
  margin-bottom: 1rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.12), 0 0 0 1px rgba(0, 212, 255, 0.2);
  transform: translateX(5px);
  border-color: rgba(0, 212, 255, 0.3);
}

.faq-question {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.faq-answer {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 关于页面 */
.about-intro {
  padding: 4rem 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.about-intro .about-text {
  max-width: 800px;
  margin: 0 auto;
}

.about-intro h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.about-intro p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

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

.feature-icon-large {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.about-feature-item {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(0, 212, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.about-feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-tech);
  transform: scaleX(0);
  transition: var(--transition);
}

.about-feature-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.about-feature-item:hover::before {
  transform: scaleX(1);
}

.about-feature-item h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-feature-item p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 技术架构 */
.tech-stack {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.tech-item {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: var(--transition);
}

.tech-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.tech-item h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.tech-item ul {
  list-style: none;
}

.tech-item li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.tech-item li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

/* 版本历史 */
.version-history {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.version-list {
  max-width: 800px;
  margin: 0 auto;
}

.version-item {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  margin-bottom: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  border-left: 4px solid;
  border-image: var(--gradient-tech) 1;
  transition: var(--transition);
}

.version-item:hover {
  transform: translateX(5px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.12), 0 0 0 1px rgba(0, 212, 255, 0.2);
}

.version-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.version-date {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.version-changes ul {
  list-style: none;
  margin-top: 1rem;
}

.version-changes li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.version-changes li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

/* 联系我们 */
.contact-section {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.contact-content {
  max-width: 1000px;
  margin: 0 auto;
}

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

.contact-item {
  background: rgba(255, 255, 255, 0.95);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.3);
}

.contact-item h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.contact-item ul {
  list-style: none;
}

.contact-item li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.contact-item li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
  .page-title {
    font-size: 2rem;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

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

  .comparison-table {
    font-size: 0.9rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

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