/**
 * 将主题变量对象转换为 CSS 变量对象
 * @param themeVars 主题变量对象
 * @param prefix CSS 变量前缀
 * @returns CSS 变量对象
 */
export default function themeVarsToCSS(themeVars: Record<string, string | number>, prefix?: string): Record<string, string>;