2020-09-15

frame

  边框线厚度 border-width
  边框线颜色 border-color
  边框线样式为虚线 border-style:dashed;
  边框圆角 border-radius
  总写 : box-shadow: 10px   10px   10px   30px    pink    inset;
  		 解 释   水平位置 垂直位置 模糊度 阴影尺寸 阴影颜色 阴影位置

Border up, down, left and right

边框线的粗细 border-top-width:20px;
                       border-right-width:20px;
                       border-bottom-width:20px;
                       border-left-width:20px;

Multi-layered background

background: url(./1.gif) no-repeat 150px 150px;
background: url(./1.gif) repeat 0px 0px;

Inner filler and outer filler

Margin
            One parameter: margin: 10px;
            two parameters: margin: 10px 20px;
            three parameters: margin: 10px 20px 30px;
            four parameters: margin: 10px 20px 30px 40px;
margin: 0 auto; automatic centering