div边角线

.bb {

 

width: 200px;

 

height: 200px;

 

margin: auto;

 

/* background: url("img/Button-White-Large.png") no-repeat 50%/70% rgba(0, 0, 0, 0.1); */

 

color: #69ca62;

 

box-shadow: 0 0 2px #237ad4 inset;

background: linear-gradient(#1359df, #1359df) left top,

linear-gradient(#1359df, #1359df) left top,

linear-gradient(#1359df, #1359df) right top,

linear-gradient(#1359df, #1359df) right top,

linear-gradient(#1359df, #1359df) left bottom,

linear-gradient(#1359df, #1359df) left bottom,

linear-gradient(#1359df, #1359df) right bottom,

linear-gradient(#1359df, #1359df) right bottom;

background-repeat: no-repeat;

background-size: 2px 15px, 15px 2px;

 

}