Wordpress Yan yana sıralamayı beceremedim

<div class="contact-from-wraper wow fadeIn"><div class="xs-from" id="xs-contact-form"><div class="row"><div class="col-lg-6"><div class="form-group">
<ul id="flight-datepicker" class="input-daterange input-group">
<li>
<input type="text" placeholder="Adınız Soyadınız *" name="ad_soyad" value="" class="form-text required inputError">
<li>

<div class="intl-tel-input allow-dropdown">
<input type="tel" name="telefon" value="" class="form-text required inputError" placeholder="05xx xxx xx xx" autocomplete="off" maxlength="14">

<li>
<input type="email" placeholder="E-posta Adresiniz *" name="eposta" value="" class="form-text"></li>
<li style="display:none;">

<input id="izin_123" type="radio" name="izin" class="validate[required]" value="1" checked="">
<label for="izin_123">Evet
</label>
</td>
</tr></tbody>
</table>
</div></li>
<li class="submit">
<input type="submit" id="submitted submit" value="Gönder" class="submitBtn" name="submit"></li>
</ul></div>
</form>

#xs-contact-form .col-lg-6 {
flex: 0 0 100%;
max-width: 100%;
}
#xs-contact-form ul {
margin-left: -15px;
margin-right: -15px;
}
#xs-contact-form ul li {
padding-left: 15px;
padding-right: 15px;
flex: 0 0 33.333333%;
}
@media (max-width: 991px) {
#xs-contact-form ul li {
flex: 0 0 100%;
}
}