/* CSS 变量定义 - 统一色彩系统 */
:root {
  /* 主色调 - 深蓝色调统一 */
  --primary-blue: #2D5AF0;
  --primary-blue-light: #4A6CF7;
  --primary-blue-dark: #1E3A8A;
  --accent-cyan: #06B6D4;

  /* 背景色系 - 深色统一 */
  --bg-primary: #0B0E14;
  --bg-secondary: #151922;
  --bg-tertiary: #1E2332;
  --bg-card: rgba(30, 35, 50, 0.6);
  --bg-overlay: rgba(11, 14, 20, 0.95);

  /* 文字色系 */
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --text-accent: #2D5AF0;

  /* 状态色 */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #06B6D4;

  /* 字体 */
  --font-primary: 'Inter', 'Segoe UI', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* 间距 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(36, 108, 249, 0.3);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-main {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 12px rgba(36, 108, 249, 0.3);
}

.logo-main:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(36, 108, 249, 0.4);
}

.logo-text {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, #246cf9 0%, #00d4ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.logo-full {
  height: 40px;
  width: auto;
  transition: var(--transition-fast);
}

.logo-full:hover {
  filter: brightness(1.1);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--primary-blue);
  background: rgba(36, 108, 249, 0.1);
}

.nav-link.active {
  color: var(--primary-blue);
  background: rgba(36, 108, 249, 0.15);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: var(--transition-fast);
  border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.nav-actions .btn {
  padding: 8px 16px;
  font-size: 0.9rem;
}

/* 导航栏社交链接样式 */
.nav-social {
  display: flex;
  align-items: center;
}

.nav-social-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-social-link:hover {
  color: var(--primary-blue);
  background: rgba(45, 90, 240, 0.1);
  transform: scale(1.1);
}

.nav-social-link svg {
  transition: var(--transition-fast);
}

/* 英雄区域样式 */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: 120px var(--spacing-lg) var(--spacing-2xl);
  background: var(--bg-primary);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  opacity: 0.8;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text {
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.title-line {
  display: block;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
}

.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease-out 0.3s both;
}

.data-dashboard {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.dashboard-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.dashboard-image:hover {
  transform: scale(1.02);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-muted);
  animation: bounce 2s infinite;
}

.scroll-text {
  font-size: 0.875rem;
  font-weight: 500;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border: 2px solid var(--primary-blue);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* 功能特性区域 */
.features-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--bg-secondary);
  position: relative;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-blue) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.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(--spacing-lg);
}

/* 统计数据区域 */
.stats-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--bg-primary);
}

.stats-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-blue);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-blue);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

/* 页脚样式 */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.footer-title {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

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

.footer-list li {
  margin-bottom: var(--spacing-xs);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary-blue);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.social-link:hover {
  color: var(--primary-blue);
}

.social-link svg {
  transition: var(--transition-fast);
}

.social-link:hover svg {
  transform: scale(1.1);
}

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--spacing-md);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

  .nav-actions {
    display: none;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    text-align: center;
  }

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

  .hero-actions {
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}