代码

#AllanboltSignature
{ 
border-top: #e0e0e0 1px dashed;
border-right: #e0e0e0 1px dashed;
border-bottom: #e0e0e0 1px dashed;
border-left: #e0e0e0 1px dashed;
padding-top: 10px;
padding-right: 10px;
padding-bottom: 10px;
padding-left: 60px;
font-family: 微软雅黑;
font-size:11px;
background: url(https://images.cnblogs.com/cnblogs_com/allanbolt/226222/o_users_two_warning_48.png) #e5f1f4 no-repeat 1% 50%;

}
#AllanboltSignature div
{
line-height: 25px;
}
#MySignature {
    background-color: whitesmoke;
    border-left: 8px solid #008200;
    border-radius: 4px;
    box-shadow: 0 0 1px #d9d9d9;
    font-size: 20px;
    margin-top: 24px;
    padding: 20px;
}
.ggao{
    overflow: hidden;
}

/*---文字居中，横线两边----*/
.header_text{
            text-align: center;
            position: relative;
            height: 10px;
            line-height: 10px;
           /* width: 800px;
            margin: 200px auto;*/
           font-size: 18px;
           color: #090;
        }
        .header_text:after,.header_text:before{
            content: "";
            position: absolute;
            top: 50%;
            background: #f60;
            height: 1px;
            width: 40%;
        }
       .header_text:after{
            left: 20px;
        }
       .header_text:before{
            right: 20px;
        }