:root { --accent:#2B6D3C; --text:#2f3533; --muted:#6b7280; --border:#e6eaed; --container: 1040px; }
    * { box-sizing:border-box; margin:0; padding:0; }
    body { font-family:'Inter',sans-serif; color:var(--text); line-height:1.7; background:linear-gradient(180deg,#f5f6f7 0,#fff 220px); overflow-x:hidden; }
    .container { max-width:var(--container); margin:0 auto; padding:0 24px; }
    .header .container { max-width: 1280px; }
    .breadcrumbs { padding:140px 0 20px; }
    .breadcrumbs ul { list-style:none; display:flex; gap:10px; color:var(--muted); font-size:.92rem; flex-wrap:wrap; }
    .breadcrumbs li::after { content:'/'; margin-left:10px; opacity:.5; }
    .breadcrumbs li:last-child::after { content:''; }
    .breadcrumbs a { color:inherit; text-decoration:none; }
    .article-wrap { padding: 6px 0 70px; }
    .article-head { margin-bottom: 24px; }
    .article-head h1 { font-family:'Montserrat',sans-serif; line-height:1.18; letter-spacing:-.02em; font-size:clamp(2rem, 4vw, 3rem); margin-bottom:12px; }
    .meta { color:var(--muted); display:flex; gap:14px; flex-wrap:wrap; font-size:.95rem; }
    .content { background:#fff; border:1px solid var(--border); border-radius:22px; padding:28px; box-shadow:0 20px 40px rgba(0,0,0,.04); }
    .content img { max-width:100%; height:auto; border-radius:14px; }
    .content h2, .content h3, .content h4 { font-family:'Montserrat',sans-serif; margin: 30px 0 12px; line-height:1.25; }
    .content p { margin: 0 0 16px; }
    .content ul, .content ol { margin: 0 0 16px 20px; }
    .content table { width:100%; border-collapse:collapse; margin:18px 0; overflow:auto; display:block; }
    .content th, .content td { border:1px solid var(--border); padding:10px; text-align:left; }
    .content a { color:#1455a5; }

    /* FAQ style aligned with main page */
    .content h2 + details,
    .content details {
      border: 1px solid var(--border);
      border-radius: 24px;
      background: #fff;
      overflow: hidden;
      margin: 14px 0;
      transition: border-color .25s ease, box-shadow .25s ease, transform .25s ease;
    }
    .content details:hover {
      border-color: rgba(43, 109, 60, 0.35);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
      transform: translateY(-1px);
    }
    .content details > summary {
      list-style: none;
      cursor: pointer;
      padding: 24px 28px;
      font-family: 'Montserrat', sans-serif;
      font-weight: 700;
      font-size: clamp(1rem, 1.8vw, 1.2rem);
      line-height: 1.35;
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      outline: none;
    }
    .content details > summary::-webkit-details-marker { display: none; }
    .content details > summary::after {
      content: '+';
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: #f3f5f6;
      color: var(--text);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-family: 'Inter', sans-serif;
      font-weight: 700;
      font-size: 24px;
      line-height: 1;
      flex-shrink: 0;
      transition: transform .25s ease, background .25s ease, color .25s ease;
    }
    .content details[open] > summary::after {
      transform: rotate(45deg);
      background: var(--accent);
      color: #fff;
    }
    .content details > p,
    .content details > div,
    .content details > ul,
    .content details > ol {
      padding: 0 28px 24px;
      margin: 0;
      color: var(--text);
      font-size: 1.02rem;
      line-height: 1.65;
    }
    .content details > p + p { margin-top: -12px; }
    .related-posts { margin-top: 26px; }
    .related-posts h2 { font-family: 'Montserrat',sans-serif; font-size: 1.35rem; margin: 0 0 12px; }
    .related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
    .related-card { text-decoration: none; color: var(--text); border: 1px solid var(--border); border-radius: 12px; padding: 12px; background: #fff; transition: .2s; }
    .related-card:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
    .related-date { display: block; color: var(--muted); font-size: .85rem; margin-bottom: 6px; }

    .toc {
      margin: 0 0 18px;
      border: 1px solid var(--border);
      border-radius: 18px;
      background: #fff;
      box-shadow: 0 8px 24px rgba(0,0,0,.04);
      overflow: hidden;
    }
    .toc__head {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
      font-family: 'Montserrat', sans-serif;
      font-size: 1rem;
      font-weight: 700;
    }
    .toc__list {
      list-style: none;
      margin: 0;
      padding: 12px 12px 14px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      max-height: 360px;
      overflow: auto;
    }
    .toc__list li { margin: 0; padding: 0; }
    .toc__list a {
      position: relative;
      display: block;
      text-decoration: none;
      color: var(--text);
      padding: 8px 10px 8px 18px;
      border-radius: 10px;
      font-size: .95rem;
      line-height: 1.35;
      transition: color .18s ease, transform .18s ease;
    }
    .toc__list a::before {
      content: "";
      position: absolute;
      left: 0;
      top: 9px;
      bottom: 9px;
      width: 0;
      border-radius: 999px;
      background: var(--accent);
      opacity: 0;
      transition: width .18s ease, opacity .18s ease;
    }
    .toc__list a:hover { background: #f3f5f6; color: var(--accent); }
    .toc__list a.is-active {
      color: var(--hb-ink, #17201b);
      font-weight: 800;
      transform: translateX(2px);
    }
    .toc__list a.is-active::before {
      width: 4px;
      opacity: 1;
    }
    .toc__l1 a { font-weight: 700; }
    .toc__l2 a { padding-left: 26px; }
    .toc__l3 a { padding-left: 38px; }
    .toc__l4 a { padding-left: 50px; font-size: .92rem; }
    footer {
      background: #111111;
      color: white;
      padding: 100px 0 50px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 80px;
      margin-bottom: 80px;
    }
    .footer-logo img {
      height: 32px;
      width: auto;
      margin-bottom: 30px;
      display: block;
      opacity: 0.9;
      transition: opacity 0.3s;
    }
    .footer-logo:hover img { opacity: 1; }
    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 30px;
      color: white;
    }
    .footer-link {
      display: block;
      color: rgba(255, 255, 255, 0.4);
      text-decoration: none;
      margin-bottom: 15px;
      font-size: 0.95rem;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      width: fit-content;
    }
    .footer-link:hover {
      color: white;
      transform: translateX(8px);
    }
.btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 26px;
      background: var(--accent);
      color: #fff;
      border-radius: 12px;
      font-weight: 700;
      font-size: .95rem;
      border: none;
      text-decoration: none;
      transition: .25s;
      line-height: 1.2;
      white-space: nowrap;
    }
    .btn:hover { filter: brightness(0.95); transform: translateY(-1px); }
    @media (max-width: 1150px) { .header__right .btn { display: none; } }
    @media (max-width: 900px) { .related-grid { grid-template-columns: 1fr; } }
    @media (max-width: 680px) { .breadcrumbs { padding-top: 116px; } .content { padding:20px; } }