*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: #f5f7fa;
      color: #2d3748;
      font-size: 16px;
      line-height: 1.8;
    }
    /* ===== Navigation ===== */
    .nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.97);
      backdrop-filter: blur(10px);
    }

    .nav-inner {
      max-width: 1200px;
      padding: 0 20px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      color: var(--gray-900);
      font-weight: 700;
      font-size: 18px;
      white-space: nowrap;
    }
    .logo-mark {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(15, 174, 255, 0.25);
    }
    .nav-logo img { width: 40px; height: 40px; }

    .nav-links {
      display: flex;
      gap: 20px;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--gray-600);
      font-size: 13px;
      font-weight: 500;
      transition: color 0.2s;
      border: none;
    }

    .nav-links a:hover { color: var(--primary); }
    /* ====== Header ====== */
    .page-header {
      background: linear-gradient(135deg, #0f766e 0%, #115e59 50%, #134e4a 100%);
      color: #fff;
      padding: 60px 24px 48px;
      text-align: center;
    }
    .page-header .category-tag {
      display: inline-block;
      background: rgba(255,255,255,0.15);
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: 20px;
      padding: 4px 16px;
      font-size: 13px;
      letter-spacing: 1px;
      margin-bottom: 18px;
    }
    .page-header h1 {
      font-size: clamp(22px, 4vw, 36px);
      font-weight: 800;
      line-height: 1.4;
      max-width: 900px;
      margin: 0 auto 16px;
    }
    .page-header .subtitle {
      font-size: 16px;
      opacity: 0.88;
      max-width: 600px;
      margin: 0 auto 28px;
    }
    .page-header .meta {
      font-size: 13px;
      opacity: 0.7;
    }

    /* ====== Layout ====== */
    .page-body {
      max-width: 1200px;
      margin: 0 auto;
      padding: 40px 20px 60px;
      display: flex;
      gap: 32px;
    }

    /* ====== Main Content ====== */
    .article-main {
      flex: 1 1 0;
      min-width: 0;
    }

    /* ====== TOC Sidebar ====== */
    .toc-sidebar {
        width: 260px;
        flex-shrink: 0;
        position: sticky;
        top: 72px;
        max-height: calc(100vh - 90px);
    }
    .toc-box {
      background: #fff;
      border-radius: 12px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.07);
      padding: 20px 18px;
      border-top: 4px solid #0f766e;
    }
    .toc-box .toc-title {
      font-size: 14px;
      font-weight: 700;
      color: #0f766e;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 14px;
    }
    .toc-box ol {
      list-style: none;
      counter-reset: toc-counter;
    }
    .toc-box ol li {
      counter-increment: toc-counter;
      margin-bottom: 10px;
      font-size: 14px;
      line-height: 1.5;
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }
    .toc-box ol li::before {
      content: counter(toc-counter);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background: #0f766e;
      color: #fff;
      border-radius: 50%;
      font-size: 11px;
      font-weight: 700;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .toc-box ol li a {
      color: #374151;
      text-decoration: none;
      transition: color 0.2s;
    }
    .toc-box ol li a:hover { color: #0f766e; }

    .cta-box {
      margin-top: 20px;
      background: linear-gradient(135deg, #f0fdfa, #ccfbf1);
      border-radius: 12px;
      padding: 20px 16px;
      text-align: center;
    }
    .cta-box .cta-label {
      font-size: 13px;
      color: #0f766e;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .cta-box .cta-product {
      font-size: 15px;
      font-weight: 800;
      color: #0f766e;
      margin-bottom: 6px;
    }
    .cta-box .cta-desc {
      font-size: 12px;
      color: #6b7280;
      margin-bottom: 14px;
      line-height: 1.6;
    }
    .cta-box .btn {
      display: block;
      background: #0f766e;
      color: #fff;
      border-radius: 8px;
      padding: 10px 0;
      font-size: 14px;
      font-weight: 700;
      text-decoration: none;
      letter-spacing: 0.5px;
      transition: background 0.2s;
    }
    .cta-box .btn:hover { background: #115e59; }

    /* ====== Sections ====== */
    .section {
      background: #fff;
      border-radius: 14px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
      padding: 36px 36px 32px;
      margin-bottom: 28px;
    }

    .section-label {
      display: inline-block;
      background: #f0fdfa;
      color: #0f766e;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 3px 10px;
      margin-bottom: 10px;
      text-transform: uppercase;
    }

    .section h2 {
      font-size: 22px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 18px;
      padding-bottom: 12px;
      border-bottom: 2px solid #e5e7eb;
      line-height: 1.4;
    }

    .section h3 {
      font-size: 17px;
      font-weight: 700;
      color: #134e4a;
      margin: 22px 0 10px;
    }

    .section p {
      color: #4b5563;
      margin-bottom: 14px;
      line-height: 1.85;
    }

    /* ====== Intro Quote ====== */
    .intro-quote {
      background: #f0fdfa;
      border-left: 4px solid #0f766e;
      border-radius: 0 10px 10px 0;
      padding: 18px 22px;
      margin-bottom: 20px;
      font-size: 15px;
      color: #115e59;
      line-height: 1.8;
    }

    /* ====== Pain List ====== */
    .pain-list {
      list-style: none;
      margin: 16px 0;
    }
    .pain-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px solid #f3f4f6;
      font-size: 15px;
      color: #374151;
      line-height: 1.7;
    }
    .pain-list li:last-child { border-bottom: none; }
    .pain-icon {
      font-size: 20px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* ====== Comparison Table ====== */
    .compare-table-wrap { overflow-x: auto; margin: 20px 0; }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }
    table.compare-table thead tr {
      background: #0f766e;
      color: #fff;
    }
    table.compare-table thead th {
      padding: 12px 14px;
      text-align: left;
      font-weight: 700;
      font-size: 13px;
    }
    table.compare-table tbody tr:nth-child(even) { background: #f8fffe; }
    table.compare-table tbody tr:hover { background: #f0fdfa; }
    table.compare-table td {
      padding: 12px 14px;
      border-bottom: 1px solid #e5e7eb;
      vertical-align: top;
      color: #374151;
    }
    table.compare-table td.highlight {
      color: #0f766e;
      font-weight: 700;
    }
    .tag-good { background: #d1fae5; color: #065f46; border-radius: 4px; padding: 2px 8px; font-size: 12px; font-weight: 600; }
    .tag-bad { background: #fee2e2; color: #991b1b; border-radius: 4px; padding: 2px 8px; font-size: 12px; font-weight: 600; }
    .tag-mid { background: #fef3c7; color: #92400e; border-radius: 4px; padding: 2px 8px; font-size: 12px; font-weight: 600; }

    /* ====== Risk Cards ====== */
    .risk-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 16px;
      margin: 20px 0;
    }
    .risk-card {
      background: #fff7ed;
      border: 1px solid #fed7aa;
      border-radius: 10px;
      padding: 18px 18px;
    }
    .risk-card .risk-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      background: #c2410c;
      color: #fff;
      border-radius: 50%;
      font-size: 12px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .risk-card .risk-title { font-weight: 700; color: #9a3412; font-size: 15px; margin-bottom: 6px; }
    .risk-card .risk-desc { font-size: 14px; color: #7c2d12; line-height: 1.6; }

    /* ====== Feature Cards ====== */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 18px;
      margin: 20px 0;
    }
    .feature-card {
      background: #f8fffe;
      border: 1px solid #ccfbf1;
      border-radius: 12px;
      padding: 20px;
      transition: box-shadow 0.2s, transform 0.2s;
    }
    .feature-card:hover { box-shadow: 0 6px 20px rgba(15,118,110,0.12); transform: translateY(-2px); }
    .feature-card .fc-icon { font-size: 28px; margin-bottom: 10px; }
    .feature-card .fc-title { font-weight: 700; color: #134e4a; font-size: 15px; margin-bottom: 6px; }
    .feature-card .fc-desc { font-size: 14px; color: #6b7280; line-height: 1.6; }

    /* ====== Advantage List ====== */
    .advantage-list {
      list-style: none;
      margin: 16px 0;
    }
    .advantage-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px solid #f3f4f6;
    }
    .advantage-list li:last-child { border-bottom: none; }
    .adv-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      background: #0f766e;
      color: #fff;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 800;
      flex-shrink: 0;
    }
    .adv-content .a-title { font-weight: 700; color: #111827; font-size: 15px; }
    .adv-content .a-desc { font-size: 14px; color: #6b7280; margin-top: 3px; line-height: 1.6; }

    /* ====== Role Table ====== */
    .role-table-wrap { overflow-x: auto; margin: 20px 0; }
    table.role-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }
    table.role-table thead tr {
      background: #134e4a;
      color: #fff;
    }
    table.role-table thead th {
      padding: 12px 16px;
      text-align: left;
      font-weight: 700;
    }
    table.role-table tbody tr:nth-child(even) { background: #f8fffe; }
    table.role-table td {
      padding: 12px 16px;
      border-bottom: 1px solid #e5e7eb;
      color: #374151;
    }

    /* ====== Scenario Grid ====== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 14px;
      margin: 16px 0;
    }
    .scenario-item {
      background: #fff;
      border: 1px solid #e5e7eb;
      border-radius: 10px;
      padding: 14px 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .scenario-item .si-icon { font-size: 26px; flex-shrink: 0; }
    .scenario-item .si-text { font-size: 14px; font-weight: 600; color: #374151; }

    /* ====== Deploy Steps ====== */
    .deploy-steps {
      display: flex;
      flex-wrap: wrap;
      gap: 0;
      margin: 20px 0;
      justify-content: center;
      overflow-x: auto;
    }
    .deploy-step {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      width: 120px;
      flex-shrink: 0;
    }
    .ds-circle {
      width: 44px;
      height: 44px;
      background: #0f766e;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      margin-bottom: 8px;
      box-shadow: 0 4px 12px rgba(15,118,110,0.25);
    }
    .ds-label { font-size: 12px; font-weight: 600; color: #374151; line-height: 1.4; }
    .deploy-arrow {
      font-size: 16px;
      color: #99f6e4;
      margin: 0;
      padding-bottom: 20px;
      flex-shrink: 0;
    }

    /* ====== Callout ====== */
    .callout {
      border-left: 4px solid #0f766e;
      background: #f0fdfa;
      border-radius: 0 8px 8px 0;
      padding: 14px 18px;
      margin: 20px 0;
      font-size: 14.5px;
      color: #115e59;
      line-height: 1.7;
    }
    .callout strong { color: #0f766e; }

    /* ====== Checklist ====== */
    .checklist {
      list-style: none;
      margin: 14px 0;
    }
    .checklist li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 8px 0;
      font-size: 15px;
      color: #374151;
    }
    .check-icon { color: #0f766e; font-size: 18px; margin-top: 2px; flex-shrink: 0; }

    /* ====== CTA Section ====== */
    .cta-section {
      background: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
      border-radius: 16px;
      padding: 40px 36px;
      text-align: center;
      color: #fff;
    }
    .cta-section h2 { font-size: 24px; font-weight: 800; margin-bottom: 12px; color: #fff; border: none; padding: 0; }
    .cta-section p { color: rgba(255,255,255,0.85); max-width: 520px; margin: 0 auto 24px; font-size: 15px; }
    .cta-btn-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
    .cta-btn-primary {
      background: #fff;
      color: #0f766e;
      padding: 14px 32px;
      border-radius: 10px;
      font-weight: 800;
      font-size: 15px;
      text-decoration: none;
      transition: opacity 0.2s;
    }
    .cta-btn-primary:hover { opacity: 0.9; }
    .cta-btn-secondary {
      background: transparent;
      color: #fff;
      border: 2px solid rgba(255,255,255,0.6);
      padding: 13px 28px;
      border-radius: 10px;
      font-weight: 700;
      font-size: 14px;
      text-decoration: none;
      transition: border-color 0.2s;
    }
    .cta-btn-secondary:hover { border-color: #fff; }
    .cta-info { margin-top: 16px; font-size: 13px; opacity: 0.7; }

    /* ====== Responsive ====== */
    @media (max-width: 768px) {
      .page-body { flex-direction: column; }
      .toc-sidebar { width: 100%; position: static; order: -1; }
      .section { padding: 24px 18px; }
      .risk-grid { grid-template-columns: 1fr 1fr; }
      .deploy-step { width: 90px; }
      .ds-label { font-size: 11px; }
      .cta-section { padding: 30px 20px; }
      .nav-links { display: none; }
    }
    @media (max-width: 500px) {
      .risk-grid { grid-template-columns: 1fr; }
      .feature-grid { grid-template-columns: 1fr; }
    }