.doc {
  background: #fff;
  padding: 24px;
  margin: 24px 0;
  border: 1px solid #e5e5e5;
  border-radius: 6px;
}
.doc__header {
  padding-bottom: 16px;
  border-bottom: 1px solid #eee;
  margin-bottom: 24px;
}
.doc__title {
  font-size: 28px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: #222;
}
.doc__updated {
  color: #888;
  font-size: 13px;
  margin: 0;
}
.doc__content {
  line-height: 1.8;
  font-size: 15px;
  color: #333;
}
.doc__content h2 {
  font-size: 20px;
  margin: 28px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #eee;
  color: #222;
}
.doc__content h3 {
  font-size: 16px;
  margin: 20px 0 8px;
  color: #222;
}
.doc__content blockquote {
  margin: 16px 0;
  padding: 8px 16px;
  border-left: 4px solid #ddd;
  background: #fafafa;
  color: #666;
}
.doc__content p {
  margin: 0 0 12px;
}
.doc__content ul,
.doc__content ol {
  padding-left: 24px;
  margin: 0 0 12px;
}
.doc__content li {
  margin-bottom: 4px;
}

.doc__content blockquote p {
  margin: 0 0 4px;
}
.doc__content code {
  background: #f5f5f5;
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 90%;
  font-family: Consolas, Monaco, "Courier New", monospace;
}
.doc__content b,
.doc__content strong {
  color: #222;
}

/* 表格 */
.doc__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.doc__content th,
.doc__content td {
  border: 1px solid #ddd;
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}
.doc__content th {
  background: #f5f5f5;
  font-weight: bold;
  white-space: nowrap;
}

/* 留言入口 */
.feedback-entry {
  padding: 16px 0;
}
.feedback-hint {
  margin-top: 12px;
  font-size: 13px;
  color: #888;
}
.feedback-hint code {
  background: #f5f5f5;
  padding: 1px 5px;
  border: 1px solid #e5e5e5;
  border-radius: 3px;
}