/* 关键 CSS - 首屏优化 */
:root {
  --color-primary: var(--color-primary);
  --color-text: var(--color-text);
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--color-background);
  color: var(--color-text);
}

header {
  background: var(--color-primary);
  color: var(--color-text);
  padding: 1rem;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

img {
  max-width: 100%;
  height: auto;
}

/* 响应式设计 */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }
  
  .hero {
    min-height: 50vh;
  }
}