.box25{
position: relative;
background: #fff0cd;
box-shadow: 0px 0px 0px 5px #fff0cd;
border: dashed 2px white;
padding: 0.2em 0.5em;
color: #454545;
}
.box25:after{
position: absolute;
content: '';
right: -7px;
top: -7px;
border-width: 0 15px 15px 0;
border-style: solid;
border-color: #ffdb88 #fff #ffdb88;
box-shadow: -1px 1px 1px rgba(0, 0, 0, 0.15);
}
.box25 p {
margin: 0; 
padding: 0;
}