1.定義文本對齊
text-align: left | right | center | justufy
2.定義垂直對齊
vertical-align :auto | baseline | sub |super |top |test-top | middle | bottom |text-bottom | length
3.定義字距和詞距
letter-spacing:1em;
word-spacing:1em;
4.定義行高
line-height:1em;
5.定義縮進
text-indent:length