   </h1>
      <div class="header-buttons">
        <a
          id="github-link"
          href="https://github.com/linyuxuanlin/Gallery-Portfolio"
          target="_blank"
        >
          <img 
            src="public/assets/github.svg" 
            alt="GitHub 仓库链接" 
            aria-label="访问 GitHub 仓库"
          />
        </a>
        <button id="theme-toggle" aria-label="切换深色/浅色主题">
          <img
            src="public/assets/brightness_4.svg"
            alt="T