哪位大哥帮我解释一下这个是什么意思

style type="text/css">
<!--
body {
    margin-left: 0px;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
}
.style1 {
    color: #bdc3cc;
    font-size: 9px;
    font-family: tahoma;
    font-weight: bold;
}
.style2 {
    color: #696969;
    font-size: 11px;
    font-family: tahoma;
    font-weight: bold;
}
.style3 {
    color: #696969;
    font-size: 10px;
    font-family: tahoma;
}
.style4 {
    color: #2e62b1;
    font-weight: bold;
}
.style5 {color: #ff4700}
.style6 {
    color: #666666;
    font-size: 9px;
    font-family: tahoma;
}
.style7 {font-size: 12px}
.style8 {color: #4f576a}
-->
</style></head>