CSS-Style的三种方式

三种方式分别为external-style，embed-style和single-element-style。

测量与颜色

前两项为absolute-value，后两项为relative-value。

测量的单位

共有16种常用的用语义化的颜色名字。

CSS-Box的spacing,borders和背景

由margin，border和padding三个部分组成。

CSS的page-layout

三栏显示的页面布局

当前的工作机型为：

                                ..,   gaowei@alpha                    ....,,:;+ccllll   ------------      ...,,+:;  cllllllllllllllllll   OS: Windows 10 רҵ□□ x86_64,cclllllllllll  lllllllllllllllllll   Host: TIMI RedmiBook 16llllllllllllll  lllllllllllllllllll   Kernel: 10.0.19041llllllllllllll  lllllllllllllllllll   Uptime: 15 hours, 28 minsllllllllllllll  lllllllllllllllllll   Packages: 57 (scoop)llllllllllllll  lllllllllllllllllll   Shell: bash 4.4.23llllllllllllll  lllllllllllllllllll   Resolution: 1920x1080                                      DE: Aerollllllllllllll  lllllllllllllllllll   WM: Explorerllllllllllllll  lllllllllllllllllll   WM Theme: Customllllllllllllll  lllllllllllllllllll   Terminal: Windows Terminalllllllllllllll  lllllllllllllllllll   CPU: AMD Ryzen 5 4500U with Radeon Graphics (6) @ 2.370GHzllllllllllllll  lllllllllllllllllll   Memory: 7321MiB / 15741MiB`'ccllllllllll  lllllllllllllllllll       `' \*::  :ccllllllllllllllll                       ````''*::cll