盒子模型练习

修改CSS，让问题列变得像解答列.

If some of the boxes don't look right, maximize the window or minimize the HTML, JS and CSS panels.

问题

Super Box
Positive Negative
Positive Postive
Battery
Earth Moon Sun
Milky Way Andromeda

解答

Super Box
Positive Negative
Positive Postive
Battery
Earth Moon Sun
Milky Way Andromeda