* {
  box-sizing: border-box;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium",
    "Meiryo", "MS PGothic", sans-serif;
  line-height: 1.8;
  color: #333;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px 60px;
  background-color: #fff;
}

h1,
h2,
h3 {
  color: #2c3e50;
}

h1 {
  border-bottom: 2px solid #2196f3;
  padding-bottom: 12px;
  margin-bottom: 24px;
  font-size: 28px;
}

h2 {
  margin-top: 36px;
  margin-bottom: 14px;
  font-size: 20px;
}

h3 {
  margin-top: 24px;
  margin-bottom: 10px;
  font-size: 17px;
}

p {
  margin-bottom: 14px;
}

ol,
ul {
  margin-bottom: 14px;
  padding-left: 24px;
}

li {
  margin-bottom: 6px;
}

ol ol {
  margin-top: 6px;
  margin-bottom: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th,
td {
  border: 1px solid #e1e8ed;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: #f5f7fa;
  font-weight: bold;
}

@media (max-width: 600px) {
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

.last-updated {
  color: #666;
  font-size: 14px;
  margin-bottom: 24px;
}

.important {
  background-color: #fff3cd;
  border: 1px solid #ffeaa7;
  padding: 14px 18px;
  border-radius: 8px;
  margin: 18px 0;
}

.definition {
  background-color: #f5f7fa;
  padding: 14px 18px;
  border-left: 4px solid #2196f3;
  margin: 16px 0;
}

.contact-info {
  background-color: #f5f7fa;
  padding: 18px 20px;
  border-radius: 8px;
  margin-top: 28px;
}

.contact-info h2 {
  margin-top: 0;
}