border-style类型
solid: 实线
dashed: 虚线,Chrome和Firefox显示的比较稀疏,IE显示的比较密集
dotted: 点线,Chrome和Firefox显示的是肖方,IE显示的是小圆
double:双线,兼容性很好,计算规则:双线宽度永远相等,中间间隔+/-1,1px: 0(左实线)+1(中间区域)+0(右实线), 2px:1+0+1, 3px:1+1+1,4px:1+2+1,5px: 2+1+2,6px:2+2+2,7px:2+3+2
inset: 内凹
outset:外凸
groove:沟槽
ridge:山脊
border-style
1、border-style:solid; 实线
2、border-style:dashed; 虚线

3、border-style:dotted; 点线

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.radius_container {
position: relative;
}
.box {
position: absolute;
width: 150px;
height: 150px;
overflow: hidden;
}
.dotted {
width: 100%;
height: 100%;
border: 150px dotted #EF2424;
}
.radius-right_top {
top: 0;
left: 400px;
}
.radius_right_bottom {
left: 400px;
top: 200px;
}
.radius_left_bottom {
left: 0;
top: 200px;
}
.row {
position: absolute;
top: 75px;
width: 550px;
height: 200px;
background: rgba(30,50,190,0.5);
color: #ffffff;
z-index: 3;
font-size: 100px;
line-height: 200px;
text-align: center;
}
.col {
position: absolute;
left: 75px;
width: 400px;
height: 350px;
background: rgba(30,50,190,0.5);
z-index: 2;
}
</style>
</head>
<body>
<div class="radius_container">
<div class="row">按钮</div>
<div class="col"></div>
<div class="box">
<div class="dotted"></div>
</div>
<div class="box radius-right_top">
<div class="dotted"></div>
</div>
<div class="box radius_right_bottom">
<div class="dotted"></div>
</div>
<div class="box radius_left_bottom">
<div class="dotted"></div>
</div>
</div>
</body>
</html>
4、border-style:double; 双线(兼容性非常好)

规律:双线宽度永远相等,中间间隔±1
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
/*border-style设为double,实现三道杠*/
.double {
width: 120px;
height: 20px;
background: rgba(0,0,0,0.1);
border-top: 60px double #CE2424;
border-bottom: 20px solid #CE2424;
}
</style>
</head>
<body>
<!-- border-style设为double,实现三道杠 -->
<div class="double"></div>
</body>
</html>
5、border-style:inset; 内凹(风格过时,兼容性差)
6、border-style:outset; 外凸(风格过时,兼容性差)
7、border-style:groove; 沟槽(风格过时,兼容性差)
8、border-style:ridge; 山脊(风格过时,兼容性差)

border-style:double类型
border-style:double;

border-style: dotted在chrome和IE下是有区别的。
三条杠---------------------
dashed
border-style:solid;dashed;dotted
利用border:double实现三条杠效果
实线 border-style:solid; 虚线 border-style:dashed; chrome/firefox: 宽3:高1 视觉上较稀疏 IE: 宽2:高1 视觉上较密集 点线 border-style:dotted; chrome/firefox: 小方 IE: 小圆
border-style : solid(实线) | dashed(虚线) | dotted(点线) | double(双实线) | inset(内凹) | outset(外凸) | groove(沟槽) | ridge(山脊)
.icon1{
display:inline-block;width:120px;height:20px;color:#ccc; border-top:60px double; border-bottom:20px solid;
}
.icon1:hover{ color:red;}<span class="icon1"></span>
solid(单线边框) ,实现圆角边框。
double(双线边框),