body {
font-family: “ヒラギノ丸ゴ ProN W4”, “Hiragino Maru Gothic ProN”, “メイリオ”, Meiryo, Verdana, Arial, sans-serif;
}
h1, h2, h3, h4 {
font-family: Verdana, "游ゴシック", YuGothic, "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, sans-serif;
}
h2 {
	position: relative;
	padding: .5em .75em;
	background-color: #f3f3f3;
	border-radius: 6px;
}
h2::after {
   content: ' ';
    height: 0;
    position: absolute;
    width: 0;
    border: 10px solid transparent;
    border-top: 15px solid #f3f3f3;
    top: 100%;
    left: 50%;
    margin-left: -10px;
}