1.凹进效果

 

background:#f2f2f2  center repeat;

border-bottom: 1px solid #e9e9e9;

border-top: 1px solid #f9f9f9;

2.突出效果

background:#f2f2f2  center repeat;

border-top: 1px solid #e9e9e9;

border-bottom: 1px solid #f9f9f9;