/* 系统字体回退方案 - 完全不依赖Google字体 */
@font-face {
  font-family: 'LocalFont';
  font-style: normal;
  font-weight: 400;
  src: local('Helvetica Neue'), local('Arial'), local('sans-serif');
  font-display: swap;
}

@font-face {
  font-family: 'LocalFont';
  font-style: normal;
  font-weight: 500;
  src: local('Helvetica Neue Medium'), local('Arial Bold'), local('sans-serif');
  font-display: swap;
}

@font-face {
  font-family: 'LocalFont';
  font-style: normal;
  font-weight: 600;
  src: local('Helvetica Neue Bold'), local('Arial Bold'), local('sans-serif');
  font-display: swap;
}

@font-face {
  font-family: 'LocalFont';
  font-style: normal;
  font-weight: 700;
  src: local('Helvetica Neue Bold'), local('Arial Bold'), local('sans-serif');
  font-display: swap;
}

:root {
  --font-family-sans: 'LocalFont', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
}

body {
  font-family: var(--font-family-sans);
}