/* 现代化颜色方案 */
:root {
  /* 主色调 */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  --primary-950: #172554;
  
  /* 辅助色 */
  --secondary-50: #f0fdf4;
  --secondary-100: #dcfce7;
  --secondary-200: #bbf7d0;
  --secondary-300: #86efac;
  --secondary-400: #4ade80;
  --secondary-500: #22c55e;
  --secondary-600: #16a34a;
  --secondary-700: #15803d;
  --secondary-800: #166534;
  --secondary-900: #14532d;
  --secondary-950: #052e16;
  
  /* 强调色 */
  --accent-50: #fefce8;
  --accent-100: #fef9c3;
  --accent-200: #fef08a;
  --accent-300: #fde047;
  --accent-400: #facc15;
  --accent-500: #eab308;
  --accent-600: #ca8a04;
  --accent-700: #a16207;
  --accent-800: #854d0e;
  --accent-900: #713f12;
  --accent-950: #422006;
  
  /* 中性色 */
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;
  --neutral-950: #0a0a0a;
  
  /* 文本色 */
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  
  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  
  /* 边框色 */
  --border-light: #e5e7eb;
  --border-medium: #d1d5db;
  --border-dark: #9ca3af;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-600);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-500);
  transition: width var(--transition-normal);
}

.nav-link:hover {
  color: var(--primary-600);
}

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

.nav-cta {
  background-color: var(--primary-600);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
  background-color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* 英雄区域 */
.hero {
  /* 只使用图片背景，移除蓝色渐变叠加层 */
  background: url('/statics/images/output.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: white;
  padding: var(--space-3xl) 0;
  margin-top: 70px;
  position: relative;
  overflow: hidden;
}

/* 移除重复的背景层，减少图片加载 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3); /* 使用半透明黑色叠加层替代重复图片 */
  z-index: 0;
}

.hero-content {
  flex: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  color: #ffffff; /* 确保文字为纯白色 */
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.6); /* 增加阴影强度 */
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #ffffff; /* 确保文字为纯白色 */
  margin-bottom: var(--space-2xl);
  font-weight: 400; /* 稍微增加字重 */
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4); /* 增加阴影强度 */
}

.hero-buttons {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-2xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  gap: var(--space-sm);
}

.btn-primary {
  background-color: white;
  color: var(--primary-600);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
}

/* 功能介绍 */
.features {
  padding: var(--space-3xl) 0;
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.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(350px, 1fr));
  gap: var(--space-2xl);
}

.feature-card {
  background-color: var(--bg-primary);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
  color: var(--primary-600);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
}

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

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

/* 下载中心 */
.download {
  padding: var(--space-3xl) 0;
  background-color: var(--bg-primary);
}

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

.download-cards {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  flex-wrap: wrap;
}

.download-card {
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  border: 2px solid var(--primary-200);
  transition: all var(--transition-normal);
  min-width: 300px;
}

.download-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-400);
}

.download-icon {
  font-size: 3rem;
  color: var(--primary-600);
  margin-bottom: var(--space-lg);
}

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

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

.btn-download {
  background-color: var(--primary-600);
  color: white;
  padding: var(--space-md) var(--space-2xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-download:hover {
  background-color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 页脚 */
.footer {
  background-color: var(--neutral-900);
  color: white;
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-column h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: white;
}

.footer-column p,
.footer-column a {
  color: var(--neutral-400);
  text-decoration: none;
  line-height: 1.8;
  transition: color var(--transition-fast);
}

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

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

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--neutral-800);
  color: var(--neutral-500);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    flex-direction: column;
    background-color: white;
    width: 100%;
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: left var(--transition-normal);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding: var(--space-2xl) 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .download-cards {
    flex-direction: column;
    align-items: center;
  }
  
  .download-card {
    width: 100%;
    max-width: 400px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .feature-card {
    padding: var(--space-xl);
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.slide-in-right {
  animation: slideInRight 0.6s ease forwards;
}

/* 滚动指示器 */
.progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 9999;
}

.progress-bar {
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  width: 0%;
  transition: width var(--transition-fast);
}