// 主题切换功能
document.addEventListener('DOMContentLoaded', function() {
  const themeSwitcher = document.getElementById('theme-switcher');
  const themeIcon = document.getElementById('theme-icon');

  // 检查本地存储中的主题偏好
  const savedTheme = localStorage.getItem('theme');

  // 检查系统偏好
  const prefersDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;

  // 设置初始主题
  if (savedTheme) {
    document.body.classList.toggle('dark-mode', savedTheme === 'dark');
    updateThemeIcon(savedTheme === 'dark');
  } else {
    document.body.classList.toggle('dark-mode', prefersDarkMode);
    updateThemeIcon(prefersDarkMode);
  }

  // 主题切换事件
  themeSwitcher.addEventListener('click', function() {
    const isDarkMode = document.body.classList.toggle('dark-mode');
    localStorage.setItem('theme', isDarkMode ? 'dark' : 'light');
    updateThemeIcon(isDarkMode);
  });

  function updateThemeIcon(isDarkMode) {
    if (isDarkMode) {
      themeIcon.classList.remove('fa-moon');
      themeIcon.classList.add('fa-sun');
    } else {
      themeIcon.classList.remove('fa-sun');
      themeIcon.classList.add('fa-moon');
    }
  }
});