/* roulang page: index */
:root {
      --bg-dark: #0B0E14;
      --bg-surface: #121820;
      --bg-card: #161F2A;
      --bg-card-hover: #1C2735;
      --accent-green: #00FF88;
      --accent-cyan: #00E5FF;
      --alert-red: #FF3B30;
      --text-main: #E6EDF3;
      --text-muted: #8B949E;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 255, 136, 0.4);
      --font-code: "JetBrains Mono", Consolas, "Courier New", monospace;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--text-main);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--accent-green);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container-wide {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Top Utility Bar */
    .top-bar-info {
      background: #06080B;
      border-bottom: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-info .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--accent-green);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 8px var(--accent-green);
    }

    /* Main Navigation Header */
    .site-header {
      background: rgba(11, 14, 20, 0.92);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 999;
      border-bottom: 1px solid var(--border-color);
    }
    .header-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      color: #FFF;
      letter-spacing: 0.5px;
    }
    .brand-logo i {
      color: var(--accent-green);
      font-size: 22px;
    }
    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--text-main);
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-green);
    }

    /* Custom Button Components */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      border-radius: 4px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      line-height: 1.4;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--accent-green);
      color: #06080B;
    }
    .btn-primary:hover {
      background: #15FF96;
      color: #000;
      box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      color: #FFF;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.25);
    }
    .btn-secondary {
      background: var(--bg-card);
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-secondary:hover {
      border-color: var(--accent-green);
      color: var(--accent-green);
    }

    /* Section Global Styles */
    section {
      padding: 85px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent-green);
      margin-bottom: 8px;
      padding: 3px 10px;
      background: rgba(0, 255, 136, 0.08);
      border: 1px solid rgba(0, 255, 136, 0.2);
      border-radius: 3px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 720px;
      line-height: 1.7;
    }

    /* Hero Section (API / Developer Stage) */
    .hero-section {
      padding: 90px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 255, 0.08), transparent 45%),
                  radial-gradient(circle at 20% 80%, rgba(0, 255, 136, 0.06), transparent 50%),
                  var(--bg-dark);
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      color: #FFF;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* Terminal/Code Block */
    .code-console {
      background: #080B10;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7);
    }
    .console-header {
      background: #111722;
      padding: 10px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .console-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #333C4A;
      display: inline-block;
    }
    .console-dots span:nth-child(1) { background: #FF5F56; }
    .console-dots span:nth-child(2) { background: #FFBD2E; }
    .console-dots span:nth-child(3) { background: #27C93F; }
    .console-title {
      font-family: var(--font-code);
      font-size: 12px;
      color: var(--text-muted);
    }
    .console-body {
      padding: 20px;
      font-family: var(--font-code);
      font-size: 13px;
      line-height: 1.6;
      color: #D2E0EE;
      overflow-x: auto;
    }
    .token-kw { color: #FF7B72; }
    .token-fn { color: #79C0FF; }
    .token-str { color: #A5D6FF; }
    .token-cmt { color: #6E7681; font-style: italic; }
    .token-acc { color: var(--accent-green); }

    /* Metric Cards Grid */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 26px 20px;
      position: relative;
      overflow: hidden;
    }
    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
    }
    .metric-num {
      font-size: 34px;
      font-weight: 800;
      color: #FFF;
      font-family: var(--font-code);
      margin-bottom: 6px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-num span {
      font-size: 16px;
      color: var(--accent-green);
    }
    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-desc {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Architecture Block */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .arch-preview {
      border-radius: 6px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #000;
    }

    /* Core Strengths (6 Cards) */
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 30px;
      transition: var(--transition);
    }
    .feature-card:hover {
      border-color: var(--accent-green);
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }
    .feature-icon {
      width: 50px;
      height: 50px;
      border-radius: 6px;
      background: rgba(0, 255, 136, 0.08);
      border: 1px solid rgba(0, 255, 136, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-green);
      font-size: 22px;
      margin-bottom: 20px;
    }
    .feature-title {
      font-size: 18px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 10px;
    }
    .feature-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .feature-meta {
      font-family: var(--font-code);
      font-size: 12px;
      color: var(--accent-cyan);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    /* Product Matrix (3 Columns) */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .matrix-badge {
      display: inline-block;
      font-size: 12px;
      color: var(--accent-cyan);
      background: rgba(0, 229, 255, 0.1);
      padding: 4px 10px;
      border-radius: 3px;
      margin-bottom: 16px;
      width: fit-content;
    }
    .matrix-name {
      font-size: 20px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 12px;
    }
    .matrix-detail {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .matrix-points {
      list-style: none;
      margin: 0 0 24px;
      padding: 0;
    }
    .matrix-points li {
      font-size: 13px;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .matrix-points li i {
      color: var(--accent-green);
      font-size: 12px;
    }

    /* Comparison Table / Box */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      overflow: hidden;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #0E141C;
      font-weight: 700;
      color: #FFF;
    }
    .compare-table td:first-child {
      font-weight: 600;
      color: var(--text-main);
    }
    .compare-bad {
      color: #FF7B72;
    }
    .compare-good {
      color: var(--accent-green);
      font-weight: 600;
    }

    /* Kernel Deep Ideology */
    .kernel-banner {
      background-image: linear-gradient(to right, rgba(11, 14, 20, 0.95), rgba(11, 14, 20, 0.8)), url('/assets/images/1cbc2942917700d2.jpg');
      background-size: cover;
      background-position: center;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 60px 40px;
    }

    /* Security Milestones (Timeline) */
    .timeline-wrap {
      position: relative;
      margin-top: 20px;
    }
    .timeline-wrap::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 18px;
      width: 2px;
      background: var(--border-color);
    }
    .timeline-node {
      position: relative;
      padding-left: 50px;
      margin-bottom: 35px;
    }
    .timeline-node::before {
      content: "";
      position: absolute;
      left: 11px;
      top: 6px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--bg-dark);
      border: 3px solid var(--accent-green);
    }
    .timeline-date {
      font-family: var(--font-code);
      font-size: 13px;
      color: var(--accent-cyan);
      margin-bottom: 4px;
      font-weight: 600;
    }
    .timeline-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 6px;
    }
    .timeline-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Case Studies (Double Column) */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .case-content {
      padding: 28px;
      flex: 1;
    }
    .case-tag {
      font-size: 12px;
      color: var(--accent-green);
      font-family: var(--font-code);
      margin-bottom: 10px;
    }
    .case-heading {
      font-size: 19px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 12px;
    }
    .case-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .case-stats {
      display: flex;
      gap: 20px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .stat-mini-num {
      font-size: 18px;
      font-weight: 700;
      color: var(--accent-cyan);
      font-family: var(--font-code);
    }
    .stat-mini-label {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Client Reviews (3 Columns) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.8;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #232E3E;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-green);
      font-weight: 700;
      border: 1px solid var(--border-color);
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: #FFF;
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* News & Threat Intel */
    .intel-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .intel-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 24px;
      display: flex;
      flex-direction: column;
    }
    .intel-date {
      font-size: 12px;
      font-family: var(--font-code);
      color: var(--accent-cyan);
      margin-bottom: 10px;
    }
    .intel-title {
      font-size: 16px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .intel-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .intel-link {
      font-size: 13px;
      color: var(--accent-green);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
    }

    /* Trust & Compliance */
    .compliance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .compliance-box {
      background: #0D1219;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 24px 20px;
      text-align: center;
    }
    .compliance-box i {
      font-size: 32px;
      color: var(--accent-cyan);
      margin-bottom: 12px;
    }
    .compliance-box h4 {
      font-size: 15px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 6px;
    }
    .compliance-box p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* FAQ & Conversion (Dual Column Form/FAQ) */
    .faq-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 700;
      color: #FFF;
      background: #151D28;
      border-bottom: 1px solid var(--border-color);
    }
    .faq-answer {
      padding: 16px 20px;
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Contact Form Panel */
    .form-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 32px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      background: #0B0E14;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      padding: 12px 14px;
      font-size: 14px;
      color: #FFF;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--accent-green);
      box-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
    }
    select.form-control {
      appearance: none;
      background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238B949E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
      background-repeat: no-repeat;
      background-position: right 14px center;
      background-size: 16px;
    }

    /* Footer */
    .site-footer {
      background: #06080C;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      font-size: 18px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 14px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--accent-green);
    }
    .footer-contact-item {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      font-size: 12px;
      color: #55606D;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* Mobile Breakpoints */
    @media (max-width: 1024px) {
      .strengths-grid, .matrix-grid, .reviews-grid, .intel-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid, .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .header-nav {
        height: auto;
        padding: 14px 0;
        flex-direction: column;
        gap: 14px;
      }
      .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 18px;
      }
      .hero-section {
        padding: 50px 0 60px;
      }
      .hero-h1 {
        font-size: 28px;
      }
      .arch-grid, .case-grid, .faq-form-grid {
        grid-template-columns: 1fr;
      }
      .strengths-grid, .matrix-grid, .reviews-grid, .intel-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .compliance-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .compare-container {
        overflow-x: auto;
      }
      .compare-table {
        min-width: 600px;
      }
    }