content:内容框(我们设置的宽高是内容框的宽高)

padding:内边距 top  right  bottom left(四边--一般默认指定的方向)

border:边框线包裹了内边距(四边)

margin:外边距 在边框的外面 元素和其他元素的间隔距离(四边)


border:边框线包裹了内边距(四边)

属性名 属性值 用法
boder-style solid(实线) dotted(点构成的虚线) dashed(-构成的虚线) double(双实线) none(没有边框线) border-style:solid double solid double;(方向为从上边开始顺时针)
border-style:solid double solid ;(上下的边框线为实线 右的边框线为双实线 下边框线为实线 左边框线为双实线  按照顺时针 最后一个左和右相同) border-style:solid double ;(上下的边框线为实线 左右的边框线为双实线)

四边的表示分别为:

boder-top-style:solid(实线)

boder-right-style:solid(实线)

boder-bottom -style:solid(实线)

boder-left-style:solid(实线)

整体::boder-style:solid(四个框全部实线) 

实际操作

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>border</title>
</head>
	<style>
		div{
			border-style:dashed;
			border-color: red;
		}
		h1{
			border-style:dashed solid;
		}
		h2{
			border-style:dashed solid double;
		}
		h3{
			border-style:solid;
		}
	</style>
<body>
	<div>content</div>
	<h1>大家</h1>
	<h2>你好</h2>
	<h3>世界</h3>
</body>
</html>

html--盒子的边框属性(border) 

 边框线的宽度

属性名 属性值 用法
border-width 像素或者%或者thin(细)\medium(默认值)中\thick(粗)之一 border-width:2px;
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>border</title>
</head>
	<style>
		div{
			border-style:dashed;
			border-width: inherit;
		}
		h1{
			border-style:dashed solid;
			border-width: thin;
		}
		h2{
			border-style:dashed solid double;
			border-width: medium;
		}
		h3{
			border-style:solid;
			border-width: thick;
		}
		h4{
			border-style:double;
			border-width: 20px;	
		}
		h5{
			border-style:dotted;
			border-width: %;
		}
	</style>
<body>
	<div>content</div>
	<h1>大家</h1>
	<h2>你好</h2>
	<h3>世界</h3>
	<h4>大家好</h4>
	<h5>我</h5>
</body>
</html>

html--盒子的边框属性(border)

 边框线的颜色

属性名 属性值 用法
border-color blue|rgb(25%,35%,45%)|#909090|transparent border-color:red blue;
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>border</title>
</head>
	<style>
		div{
			border-style:dashed;
			border-width: inherit;
		}
		h1{
			border-style:dashed solid;
			border-width: thin;
			border-color: blue;
		}
		h2{
			border-style:dashed solid double;
			border-width: medium;
			border-color: red;
		}
		h3{
			border-style:solid;
			border-width: thick;
			border-color: rgba(107,57,215,1.00);
		}
		h4{
			border-style:double;
			border-width: 20px;	
			border-color: transparent;
		}
		h5{
			border-style:dotted;
			border-width: %;
			border-color: #4E34D0;
		}
	</style>
<body>
	<div>content</div>
	<h1>大家</h1>
	<h2>你好</h2>
	<h3>世界</h3>
	<h4>大家好</h4>
	<h5>我</h5>
</body>
</html>

html--盒子的边框属性(border)


使用border属性 一次性定义 边框的宽度 样式 颜色

border:1px solid red; 

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>border</title>
</head>
	<style>
		div{
			border-style:dashed;
			border-width: inherit;
		}
		h1{
			border-style:dashed solid;
			border-width: thin;
			border-color: blue;
		}
		h2{
			border-style:dashed solid double;
			border-width: medium;
			border-color: red;
		}
		h3{
			border-style:solid;
			border-width: thick;
			border-color: rgba(107,57,215,1.00);
		}
		h4{
			border-style:double;
			border-width: 20px;	
			border-color: transparent;
		}
		h5{
			border-style:dotted;
			border-width: %;
			border-color: #4E34D0;
		}
		h6{
			border: thick solid red;
		}
	</style>
<body>
	<div>content</div>
	<h1>大家</h1>
	<h2>你好</h2>
	<h3>世界</h3>
	<h4>大家好</h4>
	<h5>我</h5>
	<h6>世界</h6>
</body>
</html>

 html--盒子的边框属性(border)

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