#text-transform
Defines how the text content should be transformed.
默认属性
text-transform: none;
Removes any text transformation: the text will appear the same as in the HTML code.
text-transform: capitalize;
Turns the first letter of each word into a capital letter.
text-transform: uppercase;
Turns all letters into capital letters.
text-transform: lowercase;
Turns all letters into lowercase letters.