.content {
    font: 14px / 21px "Malgun Gothic",Verdana,Arial,Helvetica,sans-serif;
}
.content table {
    width: 100%;
}
.content table tr:first-child {
    background-color: rgb(221, 221, 221);
}
.content table tr:first-child td, .content table tr:first-child th {
    color: #333;
    text-align: center;
    font-weight: bold;
}
.content table td, .content table th {
    border: 1px solid #999;
    padding: 7px;
}