:root {
    --color-text: #1a1a1a;
    --color-text-light: #4a4a4a;
    --color-accent: #2e6b30;
    --color-accent-dark: #1e4820;
    --color-bg: #ffffff;
    --color-bg-alt: #f1f7f1;
    --color-border: #cce0cc;
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.7;
    background: var(--color-bg);
  }

  .article-wrapper {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 80px;
  }

  .breadcrumb {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 24px;
  }
  .breadcrumb a {
    color: var(--color-text-light);
    text-decoration: none;
  }
  .breadcrumb a:hover { color: var(--color-accent); }

  header.article-header {
    margin-bottom: 36px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 28px;
  }

  h1 {
    font-family: var(--font-serif);
    font-size: 2.1rem;
    line-height: 1.25;
    margin: 0 0 16px;
    color: var(--color-text);
    font-weight: 700;
  }

  .article-meta {
    font-size: 14px;
    color: var(--color-text-light);
  }

  .lede {
    font-size: 1.15rem;
    color: var(--color-text-light);
    margin-top: 18px;
    line-height: 1.6;
  }

  article h2 {
    font-family: var(--font-serif);
    font-size: 1.55rem;
    margin: 44px 0 18px;
    color: var(--color-text);
    border-left: 4px solid var(--color-accent);
    padding-left: 14px;
  }

  article p {
    margin: 0 0 18px;
    font-size: 1.02rem;
    color: var(--color-text);
  }

  article strong { color: var(--color-text); }

  article ul {
    margin: 0 0 20px;
    padding-left: 22px;
  }
  article ul li {
    margin-bottom: 10px;
    font-size: 1.02rem;
  }

  article a {
    color: var(--color-accent);
    text-decoration: underline;
  }
  article a:hover { color: var(--color-accent-dark); }

  hr.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 40px 0;
  }

  .stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 14px;
    margin: 22px 0 28px;
  }
  .stat-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    border-radius: 6px;
    padding: 16px 14px;
    text-align: center;
  }
  .stat-card .stat-num {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    color: var(--color-accent-dark);
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
    line-height: 1.2;
  }
  .stat-card .stat-label {
    font-size: 0.82rem;
    color: var(--color-text-light);
    line-height: 1.4;
  }

  .compare-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0 28px;
    font-size: 0.94rem;
  }
  .compare-table th,
  .compare-table td {
    border: 1px solid var(--color-border);
    padding: 11px 14px;
    text-align: left;
    vertical-align: top;
  }
  .compare-table th {
    background: var(--color-bg-alt);
    font-weight: 700;
  }
  .compare-table tr:nth-child(even) { background: #f6faf6; }

  .product-box {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 8px 8px 0;
    padding: 22px 24px;
    margin: 24px 0;
  }
  .product-box .product-name {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-accent-dark);
    margin-bottom: 14px;
  }
  .product-box p {
    margin: 0 0 10px;
    font-size: 0.97rem;
    color: var(--color-text);
  }
  .product-box p:last-child { margin: 0; }

  .cta-box {
    background: var(--color-accent-dark);
    color: #fff;
    border-radius: 10px;
    padding: 32px 28px;
    margin: 40px 0;
  }
  .cta-box h3 {
    color: #fff;
    margin-top: 0;
    font-size: 1.3rem;
  }
  .cta-box p {
    color: #d9ecd9;
    margin-bottom: 20px;
  }
  .cta-button {
    display: inline-block;
    background: #ffffff;
    color: var(--color-accent-dark);
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: background 0.2s ease;
  }
  .cta-button:hover { background: #eef6ee; }

  .inline-cta {
    font-style: italic;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
    margin-top: 36px;
  }
  .inline-cta a {
    font-style: normal;
    font-weight: 600;
    color: var(--color-accent);
  }

  /* Collapsible FAQ (accordion) */
  .faq-list { margin-top: 8px; }
  .faq-item { border-bottom: 1px solid var(--color-border); }
  .faq-item:first-child { border-top: 1px solid var(--color-border); }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 4px;
    font-weight: 700;
    font-size: 1.02rem;
    color: var(--color-text);
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::marker { content: ""; }

  .faq-icon {
    flex: 0 0 auto;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
  .faq-icon::before,
  .faq-icon::after {
    content: "";
    position: absolute;
    background: var(--color-accent-dark);
    transition: transform 0.2s ease;
  }
  .faq-icon::before { width: 10px; height: 2px; }
  .faq-icon::after { width: 2px; height: 10px; }
  details[open] > summary .faq-icon::after { transform: scaleY(0); }

  .faq-answer-wrap { padding: 0 4px 20px; }
  .faq-answer {
    color: var(--color-text-light);
    font-size: 0.98rem;
    margin: 0;
  }

  .related-articles { margin-top: 50px; padding-top: 10px; }
  .related-articles h2 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    border-left: 4px solid var(--color-accent);
    padding-left: 14px;
    margin: 0 0 16px;
  }
  .related-articles ul { list-style: none; padding: 0; margin: 0; }
  .related-articles li {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 0;
  }
  .related-articles li:last-child { border-bottom: none; }
  .related-articles a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.98rem;
  }
  .related-articles a:hover { color: var(--color-accent); }
  .related-articles a::before { content: "→ "; color: var(--color-accent); }

  footer.article-footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-text-light);
  }

  @media (max-width: 600px) {
    .article-wrapper { padding: 32px 16px 60px; }
    h1 { font-size: 1.6rem; }
    article h2 { font-size: 1.3rem; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
  }