/* roulang page: index */
:root {
      --primary: #1E293B;
      --primary-light: #334155;
      --accent: #059669;
      --accent-hover: #047857;
      --secondary: #D97706;
      --bg-main: #F8FAFC;
      --bg-alt: #F1F5F9;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-subtle: #CBD5E1;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --max-width: 1200px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* Header / Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .site-brand svg {
      color: var(--accent);
      width: 26px;
      height: 26px;
    }
    .site-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .site-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .site-nav a:hover, .site-nav a.active {
      color: var(--text-main);
    }
    .site-nav a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: all 0.2s ease-in-out;
      border: 1px solid transparent;
      line-height: 1.4;
    }
    .btn-primary {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 8px rgba(5, 150, 105, 0.3);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #FFFFFF;
      border-color: var(--border-subtle);
      color: var(--primary);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--bg-alt);
    }
    .btn-secondary {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-secondary:hover {
      background: var(--primary-light);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 8px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
      background: var(--bg-alt);
      color: var(--primary-light);
    }
    .badge-accent {
      background: rgba(5, 150, 105, 0.1);
      color: var(--accent);
    }
    .badge-warning {
      background: rgba(217, 119, 6, 0.1);
      color: var(--secondary);
    }
    /* Section Shared */
    section {
      padding: 5rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 3.5rem;
    }
    .section-subtitle {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 1rem;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* Hero Section */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(5, 150, 105, 0.05), transparent 40%),
                  radial-gradient(circle at 10% 90%, rgba(30, 41, 59, 0.03), transparent 30%),
                  var(--bg-main);
      padding: 5.5rem 0;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 36px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 1.25rem;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 2rem;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-console {
      background: var(--primary);
      border-radius: var(--radius);
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      color: #E2E8F0;
      border: 1px solid #334155;
      overflow: hidden;
    }
    .console-header {
      background: #0F172A;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #334155;
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #475569;
    }
    .console-dot:nth-child(1) { background: #EF4444; }
    .console-dot:nth-child(2) { background: #F59E0B; }
    .console-dot:nth-child(3) { background: #10B981; }
    .console-title {
      font-size: 12px;
      color: #94A3B8;
      font-family: monospace;
    }
    .console-body {
      padding: 20px;
      font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
      font-size: 13px;
      line-height: 1.8;
    }
    .console-line {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
    }
    .console-label {
      color: #94A3B8;
    }
    .console-val {
      color: #10B981;
      font-weight: 600;
    }
    .console-val.amber {
      color: #F59E0B;
    }
    /* Section 2: Metrics Bar */
    .metrics-section {
      background: #FFFFFF;
      padding: 3.5rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-item {
      border-left: 3px solid var(--accent);
      padding-left: 18px;
    }
    .metric-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-desc {
      font-size: 13px;
      color: var(--text-muted);
    }
    /* Section 3: Engine Architecture */
    .arch-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .arch-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .arch-step-num {
      display: inline-block;
      width: 28px;
      height: 28px;
      background: var(--bg-alt);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      line-height: 28px;
      text-align: center;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .arch-card h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .arch-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* Section 4: Special Category Entry */
    .cat-entry-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .cat-entry-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .cat-entry-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .cat-entry-header {
      margin-bottom: 20px;
    }
    .cat-entry-header h3 {
      font-size: 22px;
      color: var(--primary);
      font-weight: 700;
      margin-top: 12px;
      margin-bottom: 8px;
    }
    .cat-entry-header p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .cat-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin: 20px 0 28px;
    }
    /* Section 5: Matrix Features */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 28px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .feature-icon-box {
      width: 44px;
      height: 44px;
      background: var(--bg-alt);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--accent);
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* Section 6: Performance Benchmark */
    .bench-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .bench-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }
    .bench-panel.highlight {
      border-color: rgba(5, 150, 105, 0.4);
      background: #FCFDFD;
    }
    .bench-panel h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .bench-list {
      list-style: none;
    }
    .bench-list li {
      padding: 12px 0;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      font-size: 14px;
    }
    .bench-list li:last-child {
      border-bottom: none;
    }
    /* Section 7: Environment & Stack */
    .stack-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .terminal-box {
      background: #0F172A;
      border-radius: var(--radius);
      padding: 24px;
      color: #94A3B8;
      font-family: monospace;
      font-size: 13px;
      line-height: 1.8;
      box-shadow: var(--shadow-md);
    }
    .terminal-code {
      color: #38BDF8;
    }
    .terminal-comm {
      color: #64748B;
    }
    /* Section 8: Content Sanitization */
    .sanit-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .sanit-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .sanit-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .sanit-body {
      padding: 24px;
    }
    .sanit-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .sanit-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* Section 9: CMS Posts Area */
    .cms-section {
      background: #FFFFFF;
    }
    .cms-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .cms-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      background: #FFFFFF;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .cms-card:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }
    .cms-card-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }
    .cms-card-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .cms-card-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .cms-card-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .cms-empty {
      grid-column: 1 / -1;
      text-align: center;
      padding: 48px;
      background: var(--bg-alt);
      border-radius: var(--radius);
      color: var(--text-muted);
      font-size: 15px;
    }
    .cms-more-bar {
      margin-top: 36px;
      text-align: center;
    }
    /* Section 10: Comparison Table */
    .table-container {
      overflow-x: auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .comp-table th, .comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .comp-table th {
      background: var(--bg-alt);
      font-weight: 600;
      color: var(--primary);
    }
    .comp-table tr:last-child td {
      border-bottom: none;
    }
    /* Section 11: FAQ Accordion */
    .faq-grid {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 24px;
    }
    .faq-question {
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .faq-answer {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* Section 12: Conversion CTA */
    .cta-section {
      background: var(--primary);
      color: #FFFFFF;
      text-align: center;
      border-bottom: none;
    }
    .cta-box {
      max-width: 760px;
      margin: 0 auto;
    }
    .cta-box h2 {
      font-size: 30px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1rem;
    }
    .cta-box p {
      font-size: 16px;
      color: #94A3B8;
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    .cta-badges {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-top: 2rem;
      font-size: 13px;
      color: #94A3B8;
    }
    /* Footer */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 3.5rem;
    }
    .footer-brand {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .footer-desc {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 2rem;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }
    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .arch-grid { grid-template-columns: repeat(2, 1fr); }
      .matrix-grid { grid-template-columns: repeat(2, 1fr); }
      .cms-grid { grid-template-columns: repeat(2, 1fr); }
      .stack-grid { grid-template-columns: 1fr; }
      .bench-grid { grid-template-columns: 1fr; }
      .cat-entry-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .site-nav { display: none; }
      .hero-h1 { font-size: 28px; }
      .metrics-grid { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr; }
      .cms-grid { grid-template-columns: 1fr; }
      .sanit-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      section { padding: 3.5rem 0; }
    }

/* roulang page: article */
:root {
      --primary: #1E293B;
      --primary-light: #334155;
      --accent: #059669;
      --accent-hover: #047857;
      --secondary: #D97706;
      --bg-main: #F8FAFC;
      --bg-alt: #F1F5F9;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-subtle: #CBD5E1;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --max-width: 1200px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .site-brand svg {
      color: var(--accent);
      width: 26px;
      height: 26px;
    }
    .site-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .site-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .site-nav a:hover, .site-nav a.active {
      color: var(--text-main);
    }
    .site-nav a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: all 0.2s ease-in-out;
      border: 1px solid transparent;
      line-height: 1.4;
    }
    .btn-primary {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 8px rgba(5, 150, 105, 0.3);
      transform: translateY(-1px);
      color: #FFFFFF;
    }
    .btn-outline {
      background: #FFFFFF;
      border-color: var(--border-subtle);
      color: var(--primary);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--bg-alt);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 8px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
      background: var(--bg-alt);
      color: var(--primary-light);
    }
    .badge-accent {
      background: rgba(5, 150, 105, 0.1);
      color: var(--accent);
    }

    /* Article Detail Section Layout */
    .article-page-wrapper {
      padding: 3rem 0 5rem;
    }
    .article-shell {
      max-width: 860px;
      margin: 0 auto;
    }

    /* Section 1: Breadcrumb & Meta */
    .article-breadcrumb-panel {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid var(--border-color);
    }
    .article-breadcrumb-panel a:hover {
      color: var(--accent);
    }
    .breadcrumb-sep {
      color: var(--border-subtle);
    }

    /* Section 2: Article Header */
    .article-header-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 2.25rem 2.5rem;
      box-shadow: var(--shadow-sm);
      margin-bottom: 2rem;
    }
    .article-headline {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 1.25rem;
      letter-spacing: -0.5px;
    }
    .article-meta-tags {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .meta-node-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Section 3: Typography & Content */
    .article-body-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 3rem 2.5rem;
      box-shadow: var(--shadow-sm);
      margin-bottom: 2rem;
    }
    .article-richtext {
      font-size: 16px;
      line-height: 1.85;
      color: var(--text-body);
    }
    .article-richtext p {
      margin-bottom: 1.4rem;
    }
    .article-richtext h2 {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-main);
      margin: 2.5rem 0 1.25rem;
      padding-left: 12px;
      border-left: 4px solid var(--accent);
      line-height: 1.4;
    }
    .article-richtext h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin: 2rem 0 1rem;
    }
    .article-richtext ul, .article-richtext ol {
      margin-bottom: 1.5rem;
      padding-left: 1.5rem;
    }
    .article-richtext li {
      margin-bottom: 0.5rem;
    }
    .article-richtext blockquote {
      background: var(--bg-alt);
      border-left: 4px solid var(--primary-light);
      padding: 1.25rem 1.5rem;
      margin: 1.75rem 0;
      color: var(--text-muted);
      border-radius: 0 var(--radius) var(--radius) 0;
      font-style: normal;
    }
    .article-richtext pre {
      background: var(--primary);
      color: #E2E8F0;
      padding: 1.25rem;
      border-radius: var(--radius);
      overflow-x: auto;
      font-size: 13px;
      line-height: 1.6;
      margin: 1.5rem 0;
    }
    .article-richtext img {
      border-radius: var(--radius);
      margin: 1.75rem auto;
      border: 1px solid var(--border-color);
    }

    /* Empty state */
    .article-empty-box {
      text-align: center;
      padding: 4rem 2rem;
    }
    .article-empty-icon {
      width: 48px;
      height: 48px;
      stroke: var(--text-muted);
      margin: 0 auto 1.5rem;
    }

    /* Section 4: Callout Alert */
    .article-callout-panel {
      background: #FFFBEB;
      border: 1px solid #FDE68A;
      border-left: 4px solid var(--secondary);
      border-radius: var(--radius);
      padding: 1.5rem 1.75rem;
      margin-bottom: 2rem;
    }
    .callout-title {
      font-size: 15px;
      font-weight: 700;
      color: #92400E;
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .callout-desc {
      font-size: 14px;
      color: #78350F;
      line-height: 1.6;
      margin: 0;
    }

    /* Section 5: Meta Footer & Copyright */
    .article-copyright-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 1.5rem 2rem;
      margin-bottom: 2rem;
      font-size: 13px;
      color: var(--text-muted);
      display: grid;
      gap: 8px;
    }
    .copyright-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
    }

    /* Section 6: Related Modules */
    .related-articles-section {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 2.25rem 2rem;
      margin-bottom: 2rem;
    }
    .related-block-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1.5rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid var(--border-color);
    }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .related-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      background: var(--bg-main);
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .related-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }
    .related-thumb {
      height: 110px;
      width: 100%;
      object-fit: cover;
    }
    .related-card-content {
      padding: 12px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .related-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 8px;
    }
    .related-time {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 7: Lead Banner */
    .article-lead-banner {
      background: var(--primary);
      border-radius: var(--radius);
      padding: 2rem 2.5rem;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .lead-banner-info h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .lead-banner-info p {
      font-size: 14px;
      color: #94A3B8;
      margin: 0;
      line-height: 1.5;
    }

    /* Site Footer */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 3.5rem;
    }
    .footer-brand {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1rem;
    }
    .footer-desc {
      color: #64748B;
      line-height: 1.7;
      margin-bottom: 1.25rem;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding-top: 2rem;
      border-top: 1px solid #1E293B;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #94A3B8;
    }

    @media (max-width: 768px) {
      .site-nav {
        display: none;
      }
      .article-headline {
        font-size: 24px;
      }
      .article-header-panel, .article-body-panel {
        padding: 1.5rem;
      }
      .related-grid {
        grid-template-columns: 1fr;
      }
      .article-lead-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #1E293B;
      --primary-light: #334155;
      --accent: #059669;
      --accent-hover: #047857;
      --secondary: #D97706;
      --bg-main: #F8FAFC;
      --bg-alt: #F1F5F9;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-subtle: #CBD5E1;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --max-width: 1200px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* Header / Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .site-brand svg {
      color: var(--accent);
      width: 26px;
      height: 26px;
    }
    .site-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .site-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .site-nav a:hover, .site-nav a.active {
      color: var(--text-main);
    }
    .site-nav a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: all 0.2s ease-in-out;
      border: 1px solid transparent;
      line-height: 1.4;
    }
    .btn-primary {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 8px rgba(5, 150, 105, 0.3);
      transform: translateY(-1px);
      color: #FFFFFF;
    }
    .btn-outline {
      background: #FFFFFF;
      border-color: var(--border-subtle);
      color: var(--primary);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--bg-alt);
    }
    .btn-secondary {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-secondary:hover {
      background: var(--primary-light);
      color: #FFFFFF;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
      background: var(--bg-alt);
      color: var(--primary-light);
    }
    .badge-accent {
      background: rgba(5, 150, 105, 0.12);
      color: var(--accent);
    }
    .badge-warning {
      background: rgba(217, 119, 6, 0.12);
      color: var(--secondary);
    }
    section {
      padding: 4.5rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 3rem;
    }
    .section-subtitle {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 0.85rem;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    
    /* Category 2 Banner */
    .cat2-banner {
      background: #FFFFFF;
      padding: 3.8rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .cat2-banner-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 36px;
      align-items: center;
    }
    .cat2-h1 {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .cat2-lead {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
      line-height: 1.7;
    }
    .badge-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .env-tag-box {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }
    .env-stat-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 13px;
    }
    .env-stat-row:last-child {
      border-bottom: none;
    }
    .env-stat-label {
      color: var(--text-muted);
      font-weight: 500;
    }
    .env-stat-val {
      font-weight: 600;
      font-family: monospace;
      color: var(--primary);
    }

    /* Environment Stack Grid */
    .env-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .env-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .env-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border-color);
    }
    .env-card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
    }
    .env-command-box {
      background: #0F172A;
      border-radius: 4px;
      padding: 12px 14px;
      color: #38BDF8;
      font-family: monospace;
      font-size: 12px;
      margin: 12px 0 16px;
      overflow-x: auto;
      line-height: 1.5;
    }
    .env-param-list {
      list-style: none;
      padding: 0;
      margin: 0;
      font-size: 13px;
      color: var(--text-body);
      flex-grow: 1;
    }
    .env-param-list li {
      position: relative;
      padding-left: 18px;
      margin-bottom: 8px;
      line-height: 1.5;
    }
    .env-param-list li::before {
      content: '✔';
      position: absolute;
      left: 0;
      color: var(--accent);
      font-size: 12px;
    }

    /* Tuning Guides Grid */
    .guides-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .guide-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      flex-direction: column;
    }
    .guide-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .guide-card-img {
      height: 160px;
      object-fit: cover;
      width: 100%;
      border-bottom: 1px solid var(--border-color);
    }
    .guide-card-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .guide-card-tag {
      margin-bottom: 8px;
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
    }
    .guide-card-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .guide-card-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .guide-card-foot {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid var(--bg-alt);
      padding-top: 12px;
    }

    /* Dashboard Metrics Panel */
    .dashboard-panel {
      background: #0F172A;
      color: #F8FAFC;
      border-radius: var(--radius);
      padding: 32px;
      border: 1px solid #334155;
      box-shadow: var(--shadow-md);
    }
    .dash-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 28px;
      padding-bottom: 16px;
      border-bottom: 1px solid #1E293B;
    }
    .dash-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #34D399;
      font-size: 13px;
      font-weight: 600;
    }
    .dash-status::before {
      content: '';
      width: 8px;
      height: 8px;
      background: #34D399;
      border-radius: 50%;
      box-shadow: 0 0 8px #34D399;
    }
    .dash-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 28px;
    }
    .dash-metric-item {
      background: #1E293B;
      border: 1px solid #334155;
      border-radius: 4px;
      padding: 16px;
    }
    .dash-metric-name {
      font-size: 12px;
      color: #94A3B8;
      margin-bottom: 6px;
    }
    .dash-metric-num {
      font-size: 22px;
      font-weight: 700;
      color: #F8FAFC;
      font-family: monospace;
    }
    .dash-metric-note {
      font-size: 11px;
      color: #64748B;
      margin-top: 4px;
    }
    .dash-param-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      font-family: monospace;
    }
    .dash-param-table th, .dash-param-table td {
      padding: 10px 14px;
      text-align: left;
      border-bottom: 1px solid #1E293B;
    }
    .dash-param-table th {
      color: #94A3B8;
      background: #162032;
      font-weight: 600;
    }
    .dash-param-table td {
      color: #E2E8F0;
    }
    .dash-param-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    /* Troubleshooting Grid */
    .trouble-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .trouble-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .trouble-code {
      display: inline-block;
      font-family: monospace;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 3px;
      background: rgba(217, 119, 6, 0.1);
      color: var(--secondary);
      font-weight: 700;
      margin-bottom: 10px;
      align-self: flex-start;
    }
    .trouble-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .trouble-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
    }
    .trouble-solution {
      background: var(--bg-alt);
      border-left: 3px solid var(--accent);
      padding: 10px 12px;
      font-size: 12px;
      color: var(--text-body);
      border-radius: 0 4px 4px 0;
      margin-top: auto;
    }

    /* Security Box */
    .security-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .sec-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .sec-icon {
      width: 40px;
      height: 40px;
      border-radius: 6px;
      background: rgba(5, 150, 105, 0.1);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 18px;
    }
    .sec-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .sec-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Support CTA Box */
    .support-box {
      background: linear-gradient(135deg, var(--primary) 0%, #0F172A 100%);
      color: #FFFFFF;
      border-radius: var(--radius);
      padding: 44px;
      text-align: center;
      border: 1px solid #334155;
    }
    .support-title {
      font-size: 24px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .support-desc {
      font-size: 15px;
      color: #94A3B8;
      max-width: 700px;
      margin: 0 auto 24px;
      line-height: 1.7;
    }

    /* Footer */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1.2fr 1fr;
      gap: 48px;
      margin-bottom: 3.5rem;
    }
    .footer-brand {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-desc {
      line-height: 1.7;
      margin-bottom: 1.5rem;
      color: #64748B;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
      border-left: 3px solid var(--accent);
      padding-left: 10px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding-top: 2rem;
      border-top: 1px solid #1E293B;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #94A3B8;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .env-grid, .guides-grid, .trouble-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dash-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }
    @media (max-width: 768px) {
      .cat2-banner-grid {
        grid-template-columns: 1fr;
      }
      .env-grid, .guides-grid, .trouble-grid, .security-grid {
        grid-template-columns: 1fr;
      }
      .dash-metrics-grid {
        grid-template-columns: 1fr;
      }
      .site-nav {
        display: none;
      }
      .cat2-h1 {
        font-size: 26px;
      }
      .section-title {
        font-size: 22px;
      }
    }

/* roulang page: category1 */
:root {
      --primary: #1E293B;
      --primary-light: #334155;
      --accent: #059669;
      --accent-hover: #047857;
      --secondary: #D97706;
      --bg-main: #F8FAFC;
      --bg-alt: #F1F5F9;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-subtle: #CBD5E1;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --max-width: 1200px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* Header / Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .site-brand svg {
      color: var(--accent);
      width: 26px;
      height: 26px;
    }
    .site-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .site-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .site-nav a:hover, .site-nav a.active {
      color: var(--text-main);
    }
    .site-nav a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: all 0.2s ease-in-out;
      border: 1px solid transparent;
      line-height: 1.4;
    }
    .btn-primary {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 8px rgba(5, 150, 105, 0.3);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #FFFFFF;
      border-color: var(--border-subtle);
      color: var(--primary);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--bg-alt);
    }
    .btn-secondary {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-secondary:hover {
      background: var(--primary-light);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 8px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
      background: var(--bg-alt);
      color: var(--primary-light);
    }
    .badge-accent {
      background: rgba(5, 150, 105, 0.1);
      color: var(--accent);
    }
    .badge-warning {
      background: rgba(217, 119, 6, 0.1);
      color: var(--secondary);
    }
    /* Section Shared */
    section {
      padding: 4.8rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 3.2rem;
    }
    .section-subtitle {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 1rem;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* Category Banner */
    .category-banner {
      background: #FFFFFF;
      padding: 3.5rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .banner-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .category-h1 {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .banner-text {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 1.5rem;
    }
    .topology-badges {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }
    .topology-card-preview {
      background: var(--primary);
      border-radius: var(--radius);
      padding: 24px;
      color: #E2E8F0;
      font-family: Consolas, monospace;
      font-size: 13px;
      line-height: 1.8;
      box-shadow: var(--shadow-md);
      border: 1px solid #334155;
    }
    .topology-card-preview .path-highlight {
      color: #34D399;
    }
    .topology-card-preview .comment {
      color: #94A3B8;
    }
    /* Topology Grid */
    .topology-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .topology-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.2s ease-in-out;
    }
    .topology-item:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
      transform: translateY(-2px);
    }
    .topology-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius);
      background: rgba(5, 150, 105, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: var(--accent);
    }
    .topology-item h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .topology-item p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 0;
      line-height: 1.6;
    }
    /* Solutions Cards */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .solution-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.2s ease-in-out;
    }
    .solution-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--border-subtle);
      transform: translateY(-2px);
    }
    .solution-img-wrap {
      height: 180px;
      overflow: hidden;
      background: #E2E8F0;
    }
    .solution-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .solution-card:hover .solution-img-wrap img {
      transform: scale(1.03);
    }
    .solution-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .solution-body p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 18px;
      flex: 1;
      line-height: 1.6;
    }
    .solution-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      font-size: 13px;
      color: var(--text-muted);
    }
    /* Benchmark Table */
    .table-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .spec-table th {
      background: #F8FAFC;
      padding: 16px 20px;
      color: var(--text-main);
      font-weight: 700;
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }
    .spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-body);
      vertical-align: middle;
      white-space: nowrap;
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .spec-table tr:hover td {
      background: #F8FAFC;
    }
    /* Step Cards */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 800;
      color: rgba(5, 150, 105, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .step-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 0;
    }
    /* Comparison Checklist */
    .checklist-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .checklist-col {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
    }
    .checklist-col.wrong {
      border-top: 3px solid #EF4444;
    }
    .checklist-col.right {
      border-top: 3px solid var(--accent);
    }
    .checklist-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .checklist-col.wrong .checklist-title {
      color: #DC2626;
    }
    .checklist-col.right .checklist-title {
      color: var(--accent);
    }
    .check-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .check-list li {
      padding: 10px 0;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }
    .check-list li:last-child {
      border-bottom: none;
    }
    .check-list li svg {
      flex-shrink: 0;
      margin-top: 4px;
    }
    /* Bottom Block CTA */
    .guide-banner-card {
      background: var(--primary);
      border-radius: var(--radius);
      padding: 40px;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }
    .guide-banner-text h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .guide-banner-text p {
      color: #94A3B8;
      font-size: 14.5px;
      margin-bottom: 0;
      max-width: 650px;
    }
    .guide-banner-actions {
      display: flex;
      gap: 12px;
      flex-shrink: 0;
    }
    /* Footer */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 3.5rem;
    }
    .footer-brand {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-desc {
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 18px;
      color: #94A3B8;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 14px;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #94A3B8;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }
    /* Responsive */
    @media (max-width: 1024px) {
      .topology-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .site-nav {
        display: none;
      }
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      .checklist-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .guide-banner-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }
    @media (max-width: 520px) {
      .topology-grid {
        grid-template-columns: 1fr;
      }
      .steps-container {
        grid-template-columns: 1fr;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}