<style>.t-payform-row{display:block;margin:1%;width:160px;}</style>
<script src="https://securepay.tinkoff.ru/html/payForm/js/tinkoff_v2.js"></script>
<form name="t-payform" onsubmit="pay(this); return false;">
  <input class="t-payform-row" type="hidden" name="terminalkey" value="1689550395432">
  <input class="t-payform-row" type="hidden" name="frame" value="false">
  <input class="t-payform-row" type="hidden" name="language" value="ru"> 
    <input class="t-payform-row" type="text" placeholder="Сума заказа" name="amount" required>
    <input class="t-payform-row" type="text" placeholder="Номер заказа" name="order">
    <input class="t-payform-row" type="text" placeholder="Описание заказа" name="description">
    <input class="t-payform-row" type="text" placeholder="ФИО плательщика" name="name">
    <input class="t-payform-row" type="text" placeholder="E-mail" name="email">
    <input class="t-payform-row" type="text" placeholder="Контактный телефон" name="phone">
    <input class="t-payform-row" type="submit" value="Оплатить">
</form>