/* 全局CSS变量 */
:root {
  --primary-blue: #4299e1;
  --primary-blue-dark: #3182ce;
  --primary-orange: #ed8936;
  --primary-orange-dark: #dd6b20;
  --success-green: #48bb78;
  --error-red: #f56565;
  --text-white: #f7fafc;
  --text-light: #e2e8f0;
  --text-gray: #a0aec0;
  --text-dark: #718096;
  --bg-dark: #0f1419;
  --bg-darker: #1a202c;
  --bg-darkest: #2d3748;
  --border-light: rgba(255, 255, 255, 0.1);
  --border-medium: rgba(255, 255, 255, 0.2);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-light);
  background: var(--bg-dark);
  margin: 0;
  padding: 0;
  /* 移动端点击透明 */
  -webkit-tap-highlight-color: transparent;
  max-width: 1920px;
  margin: 0 auto;
  -webkit-overflow-scrolling: touch;
}

/* 通用容器 */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 通用按钮样式 */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-orange), var(--primary-orange-dark));
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(237, 137, 54, 0.3);
  text-decoration: none;
  display: inline-block;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(237, 137, 54, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
}

.btn-large {
  padding: 20px 40px;
  font-size: 18px;
}

/* 通用卡片样式 */
.card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 30px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}