项目符号

• list-style-type: none
• list-style-type: disc | circle | square
• list-style-type: decimal | lower-roman | upper-roman | lower-alpha | upper-alpha
• list-style-type: armenian | cjk-ideographic | georgian |lower-greek | hebrew | hiragana | hiragana-iroha | katakana | katakana-iroha | lower-latin |upper-la

默认值为 disc(实心圆 ),第四行为不常用。