微信小程序button去除默认样式

button {
  font-size: 28rpx;
  background-color: #fff;
  border: none;
  padding: 0;
  margin: 0;
  line-height: 1;
}

input {
  outline: none;
  border: none;
  list-style: none;
}

button::after {
  border: none;
}