图书馆专业类图书借阅期限为几天
```html
body {
fontfamily: Arial, sansserif;
backgroundcolor: f7f7f7;
textalign: center;
}
h1 {
color: 333333;
}
.coloringtemplate {
display: flex;
flexwrap: wrap;
justifycontent: center;
alignitems: center;
gap: 15px;
margintop: 20px;
}
.book {
width: 100px;
height: 150px;
backgroundcolor: ffffff;
border: 2px solid 333333;
position: relative;
}
.book:before, .book:after {
content: "";
display: block;
position: absolute;
backgroundcolor: 333333;
}
.book:before {
width: 20px;
height: 100%;
top: 0;
left: 0;
}
.book:after {
width: 100%;
height: 20px;
bottom: 0;
left: 0;
}
图书馆图书填色模板