:root {
  /* 全新主题色彩 */
  --primary-color: #2563eb;
  --secondary-color: #7c3aed;
  --accent-color: #db2777;
  --success-color: #16a34a;
  --warning-color: #ea580c;
  --danger-color: #dc2626;
  --info-color: #0891b2;
  
  /* 中性色 */
  --dark-900: #000000;
  --dark-800: #1e293b;
  --dark-700: #334155;
  --dark-600: #475569;
  --dark-500: #64748b;
  --light-500: #94a3b8;
  --light-400: #cbd5e1;
  --light-300: #e2e8f0;
  --light-200: #f1f5f9;
  --light-100: #f8fafc;
  --white: #ffffff;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
  --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  /* 圆角 */
  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* 过渡 */
  --transition: all 0.2s ease-in-out;
  --transition-slow: all 0.3s ease-in-out;
  
  /* 断点 */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* 基础重置 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--light-100);
  color: var(--dark-900);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 新的动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

/* 新的组件样式 */
.modern-container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

.modern-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}

.modern-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.modern-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.modern-button.primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow);
}

.modern-button.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.modern-button.secondary {
  background: var(--gradient-primary);
  color: var(--white);
}

.modern-button.secondary:hover {
  background: #8621e4;
}

.modern-button.icon {
  gap: 0.5rem;
}

.modern-title {
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1.2;
  color: var(--dark-900);
  margin-bottom: 1rem;
}

.modern-subtitle {
  font-size: 1.25rem;
  color: var(--dark-600);
  margin-bottom: 2rem;
}

.modern-grid {
  display: grid;
  gap: 1.5rem;
}

.modern-section {
  padding: 1rem 0 0 0;
}

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

.modern-section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark-900);
  margin-bottom: 1rem;
}

.modern-section-subtitle {
  font-size: 1.125rem;
  color: var(--dark-600);
  max-width: 600px;
  margin: 0 auto;
}

/* 响应式设计 */
@media (min-width: 640px) {
  .modern-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .modern-section {
    padding: 4rem 0 0 0;
  }
}

@media (min-width: 1024px) {
  .modern-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .modern-title {
    font-size: 3rem;
  }
}

@media (min-width: 1280px) {
  .modern-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}