*, *::before, *::after { box-sizing: border-box; }
      html, body {
        margin: 0;
        padding: 0;
        background: #f9fafb;
        color: #111827;
        font-family: Georgia, 'Times New Roman', serif;
        font-size: 16px;
        line-height: 1.75;
      }
      .pp-wrap {
        max-width: 760px;
        margin: 0 auto;
        padding: 56px 32px 80px;
      }
      .pp-back {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 13px;
        color: #2563eb;
        text-decoration: none;
        margin-bottom: 36px;
        opacity: 0.85;
        transition: opacity 0.15s;
      }
      .pp-back:hover { opacity: 1; text-decoration: underline; }
      .pp-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 8px;
      }
      .pp-logo img { width: 28px; height: 28px; }
      .pp-logo span {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 15px;
        font-weight: 700;
        color: #2563eb;
        letter-spacing: 0.2px;
      }
      h1 {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 2rem;
        font-weight: 700;
        color: #111827;
        margin: 0 0 6px;
        line-height: 1.2;
      }
      .pp-meta {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 13px;
        color: #9ca3af;
        margin-bottom: 40px;
        display: block;
      }
      .pp-toc {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 14px;
        background: #fff;
        border: 1px solid #e5e7eb;
        border-radius: 10px;
        padding: 1rem 1.25rem;
        margin-bottom: 2rem;
      }
      .pp-toc strong { display: block; margin-bottom: 0.5rem; color: #1e3a8a; }
      .pp-toc ol { margin: 0; padding-left: 1.25rem; }
      .pp-toc li { margin-bottom: 0.25rem; }
      .pp-toc a { text-decoration: none; }
      .pp-toc a:hover { text-decoration: underline; }
      hr {
        border: none;
        border-top: 1px solid #e5e7eb;
        margin: 0 0 40px;
      }
      h2 {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 1.05rem;
        font-weight: 700;
        color: #111827;
        margin: 40px 0 8px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
      }
      h3 {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 0.95rem;
        font-weight: 700;
        color: #334155;
        margin: 24px 0 6px;
      }
      p { margin: 0 0 14px; }
      ul, ol {
        margin: 4px 0 16px;
        padding-left: 22px;
      }
      li { margin-bottom: 6px; }
      a { color: #2563eb; }
      a:hover { color: #1d4ed8; }
      .pp-footer {
        margin-top: 60px;
        padding-top: 20px;
        border-top: 1px solid #e5e7eb;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 13px;
        color: #9ca3af;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
      }
      .pp-footer a { color: #6b7280; text-decoration: none; }
      .pp-footer a:hover { color: #2563eb; }
      .pp-related {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        font-size: 14px;
        margin-bottom: 28px;
        padding: 0.65rem 1rem;
        background: #fff;
        border: 1px solid #e5e7eb;
        border-radius: 10px;
        color: #64748b;
      }
      .pp-related a {
        color: #2563eb;
        text-decoration: none;
        font-weight: 500;
      }
      .pp-related a:hover { text-decoration: underline; }
      .pp-related a[aria-current="page"] {
        color: #1e3a8a;
        font-weight: 700;
        pointer-events: none;
      }
      @media (max-width: 600px) {
        .pp-wrap { padding: 32px 20px 60px; }
        h1 { font-size: 1.5rem; }
      }