iv>
            <div class="form-actions">
              <button type="submit" class="btn-primary" id="btn-login">
                登录
              </button>
            </div>
          </form>
        </div>

        <div class="register-form" id="register-form" style="display: none">
          <form id="register-form-element">
            <div class="form-group">
              <label for="reg-email">邮箱</label>
              <input
                type="email"
                id="reg-email"
      