重构后的代码如下：
```css
.textarea {
border-right: 1px solid black;
border-top: 1px solid black;
margin: 2px;
border-left: 1px solid black;
width: 180px;
border-bottom: 1px solid black;
height: 140px
}
TD {
font-size: 12px;
color: #000000;
line-height: 150%
}
A:link {
color: #000000;
text-decoration: underline
}
A:visited {
color: #999999;
text-decoration: underline
}
A:active {
color: #666666;
text-decoration: none
}
A:hover {
color: #ff0000;
text-decoration: none
}
.black1 {
font-size: 12px;
color: #cccccc;
line-height: 19px;
text-decoration: none
}
.shadow {
font-weight: bold;
font-size: 16px;
filter: dropshadow(color=#333333,offx=1,offy=1);
color: #cccccc;
font-family: sans-serif
}
.t13a {
font-size: 14px;
color: #993300;
line-height: 20px;
text-decoration: none
}
.t13b {
font-size: 14px;
color: #3a3a3a;
line-height: 20px;
text-decoration: none
}
.t14 {
font-size: 14px;
color: #3a3a3a;
line-height: 20px;
text-decoration: none
}
.bai {} /* 请补充 Bai class */
```
