默认：<input type="number" />
处理：<input type="number" class="deal" />
CSS代码：
/*添加背景色*/
.deal::-webkit-textfield-decoration-container {
background-color: #f0f3f9;
}
/*去掉input 输入框右边的上下箭头按钮*/
.deal::-webkit-inner-spin-button {
-webkit-appearance: none;
}
.deal::-webkit-outer-spin-button {
-webkit-appearance: none;
}
