- 登录容器 -->
    <div class="container login-container">
      <div class="login-panel">
        <div class="login-header">
          <h2 id="login-title">钦灵 Chat</h2>
          <div id="login-subtitle">请登录或注册账号</div>
        </div>

        <div class="auth-tabs">
          <button class="auth-tab active" id="login-tab">登录</button>
          <button class="auth-tab" id="register-tab">注册</button>
        </div>

        <div class="login-form" id="login-form">
          <fo