JFIF C
? rgin:10% auto;}
.title{background: #20a53a;color: #fff;font-size: 16px;height: 40px;line-height: 40px;text-align: center;}
.content{background-color:#f3f7f9; height:280px;border:1px dashed #c6d9b6;padding:20px}
#change{
font-size: 200px;
text-align: center;
}