* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: Helvetica, Arial, sans-serif;
  background: #ffffff;
  color: #222;
  line-height: 1.7;
}
.nd-wrap { max-width: 820px; margin: 0 auto; padding: 50px 24px 90px; }
.nd-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.nd-head h1 { font-size: 28px; font-weight: 700; color: #111; }
.nd-head .nd-badge {
  font-size: 12px; color: #0070ba;
  border: 1px solid #bcd7ea; border-radius: 999px; padding: 3px 12px;
}
.nd-meta { color: #888; font-size: 13px; margin-bottom: 34px; }
.nd-intro { font-size: 15px; color: #444; margin-bottom: 30px; }
.nd-sec { display: grid; grid-template-columns: 40px 1fr; gap: 16px; margin-bottom: 26px; }
.nd-key {
  font-size: 15px; font-weight: 700; color: #0070ba;
  border-top: 2px solid #0070ba; padding-top: 6px;
}
.nd-sec h2 { font-size: 17px; margin-bottom: 6px; color: #111; }
.nd-sec p, .nd-sec li { font-size: 15px; color: #444; }
.nd-sec ul { margin: 8px 0 0 20px; }
.nd-sec a { color: #0070ba; }
.nd-return { display: inline-block; margin-top: 30px; color: #0070ba; text-decoration: none; font-size: 14px; }
.nd-return:hover { text-decoration: underline; }