article.main {
    margin: 40px auto;
    width: 1440px;
    min-height: 400px;
}

h2 {
    line-height: 50px;
    color: #555;
    text-align: center;
}
article.main header {
    border-bottom: #ccc 1px dotted;
}
article.main footer {
    margin-top: 30px;
    line-height: 30px;
    font-size: 16px;
}