* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #f5f5f5;
  /* 移动端优化 */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* 移动端全局样式优化 */
@media (max-width: 767px) {
  * {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  }
  
  input, select, textarea, button {
    font-size: 16px; /* 防止iOS自动缩放 */
  }
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}