CSS带小三角形的div框
```css复制代码
超时20天
.hint_prompt {
border: 1px solid #fff1f0;
border-radius: 4px;
margin: 50px;
text-align: center;
border: 1px solid #fff1f0;
position: relative;
padding: 3px 5px;
background: #fff1f0;
font-family: PingFangSC-Regular;
font-weight: 400;
font-size: 14px;
color: #fd4b40;
}
.hint_prompt::before {
content: "";
position: absolute;
left: -56px;
top: -43px;
width: 10px;
height: 10px;
margin: 50px;
transform: rotate(-45deg);
background: #fff1f0;
z-index: 0;
border-top: 2px solid #fff1f0;
border-left: 2px solid #fff1f0;
}