* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: #eeeeee;
  color: #111;
  font-family: "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.9;
}

.real-page {
  max-width: 720px;
  margin: 40px auto;
  padding: 32px 28px;

  background: #fff;
  border: 1px solid #999;
}

h1 {
  margin: 0 0 28px;
  padding-bottom: 10px;

  font-size: 28px;
  border-bottom: 3px double #555;
}

h2 {
  margin: 30px 0 10px;
  padding: 6px 10px;

  font-size: 19px;
  background: #eeeeee;
  border-left: 6px solid #555;
}

p {
  margin: 0 0 18px;
  font-size: 16px;
}

a {
  color: #0645ad;
  overflow-wrap: anywhere;
}

.link-area {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid #aaa;
}

.link-area a {
  display: block;
  width: fit-content;
  margin: 12px 0;
  padding: 10px 18px;

  border: 1px solid #777;
  background: #f5f5f5;
  color: #111;
  text-decoration: none;
}

.link-area a:hover {
  background: #e5e5e5;
}

@media (max-width: 600px) {
  body {
    background: #fff;
  }

  .real-page {
    margin: 0;
    padding: 24px 18px;

    border: none;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 17px;
  }

  p {
    font-size: 15.5px;
    line-height: 1.9;
  }

  .link-area a {
    width: 100%;
    text-align: center;
  }
}