Styles not applying in Crystal reports when export to pdf

Styles not applying in Crystal reports when export to pdf.

My style sheet as follows,

.body
{
font-family: Verdana;
font-style: italic;
font-weight: bold;
color: Black;
font-size:14px;
background-color:white;
}

.body1
{
font-family: Verdana;
font-style: Normal;
font-weight: Normal;
color: Black;
font-size:12px;
}

.body2
{
font-family: Verdana;
font-style: normal;
font-weight: bold;
color: Red;
font-size: 12px;
background-color: silver;
text-decoration: underline;
}

.body3
{
font-family: Verdana;
font-style: Normal;
font-weight: Normal;
color: Black;
font-size:10px;
}

.body4
{
font-family: Verdana;
font-style: Normal;
font-weight: Bold;
color: Black;
font-size:10px;

}