body { font-size: 75%; font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "ＭＳ Ｐゴシック", sans-serif; line-height: 1.5; color: #333333; background-color: #ffffff; text-decoration: none; }
#menu_top { width: 435px; }
#menu_top ul {
	list-style: none;
	margin: 0;
	padding: 0;
	height: 15px;
	overflow: hidden;
	border-bottom: 1px solid #6cc;
}
#menu_top li { float: left; width: 68px; margin: 1px; padding: 0; list-style-type: none; }
#menu_top a { display: block; width: 100%; padding: 4px 0; color: #336; background-color: #99f; text-decoration: none; text-align: center; border-color: #fff; border-width: 12px; list-style-type: none;; }
#menu_top a:hover { color: #fff; background-color: #639; border-color: #ccc; border-width: 12px; /* オンマウス時の背景色を指定 */
}