body {
  font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro",
    "メイリオ", Meiryo, Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
  font-size: 12px;
  background-color: #eaeaea;
}
#content {
  background-color: white;
  line-height: 1.5;
  width: 540px;
  padding: 20px;
  margin: 50px auto 0;
}
h2 {
  margin-top: 30px;
  margin-bottom: 10px;
}
</style>