## 目录
1. [居中](#居中)
### 居中
```css
top:50%;
left:50%;
transform: translate(-50%, -50%);
```
2.简易镂空效果
```
outline: 9999px solid rgba(0,0,0,.76);
```
3.多行文字
```
overflow: hidden;
text-overflow:ellipsis;
white-space: nowrap;
word-wrap:break-word;
word-break:break-all;
display:-webkit-box;
-webkit-box-orient:vertical;
-webkit-line-clamp:2;
overflow:hidden;
word-wrap:break-word;
word-break:break-all;
```
4.不被挤
```css
flex-grow: 0;
flex-shrink:0;
```
5.文字换行
6.input-placeholder
::-webkit-input-placeholder {
color:#c5c5c5;
font-size:px(28rem);
line-height:px(65rem);
}
7.ios input阴影{-webkit-appearance: none;}
