为考研学子写鼓励信

写给考研人的明信片

```html致考研学生的信封 body { fontfamily: Arial, sansserif; lineheight: 1.6; margin: 0; padding: 20px; } .container { maxwidth: 600px; margin: 0 auto; padding: 20px; backgroundcolor: f9f9f9; border: 1px solid ddd; borderradius: 5px;...