.spoiler_open::before {
content: url(/img/menu.png);
max-width: 25px;
max-height: 25px;
border-bottom: 1px dotted #fff;
cursor: default;
text-indent: 10px;
border-radius: 5px 5px 0 0;
background: #fff;
display: block;
position: absolute;
top: 0;
left: 0
}
.box{
background-color: #FFF;
color: #FFFFFF;
padding: 15px;
border-radius: 3px;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
-khtml-border-radius: 3px;
-o-border-radius: 3px;
}
.box img{
width: 25px;
height: 25px;
}
.spoiler_open::before {
background-image: url(/img/menu.png);
background-size: 25px 25px;
display: inline-block;
width: 25px;
height: 25px;
content:"";
}