#header {width: 550px; height: 50px; background: #f55; border-radius: 10px; padding: 10px; margin-bottom: 5px}
#content {float: left; width: 385px; height: 200px; background: orange; border-radius: 10px; padding: 10px; margin-right: 5px}
.article {width: 80%; height: 60%; background: #5f5; margin: 5px auto; border-radius: 10px; padding: 10px; margin-bottom: 5px}
#aside {float: right; width: 140px; height: 200px; background: #55f; border-radius: 10px; padding: 10px; margin-bottom: 5px}
#footer {clear: both; width: 550px; height: 50px; background: #ddd; border-radius: 10px; padding: 10px}