/* roulang page: index */
:root {
      --bg-dark: #0B131A;
      --bg-card: #0F222D;
      --bg-card-hover: #162C3A;
      --accent-green: #00FF87;
      --accent-orange: #FF5E3A;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --border-color: rgba(148, 163, 184, 0.15);
      --border-highlight: rgba(0, 255, 135, 0.4);
      --font-stack: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
      --font-mono: ui-monospace, "DIN Alternate", "SFMono-Regular", Consolas, monospace;
      --max-w: 1240px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.7;
      font-size: 15px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea { font-family: inherit; }
    
    .container {
      width: 100%;
      max-w: var(--max-w);
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    .site-topbar {
      background-color: #05080A;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .site-topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-left, .topbar-right {
      display: flex;
      gap: 18px;
    }
    .nav-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11, 19, 26, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .brand-logo span {
      color: var(--accent-green);
    }
    .brand-badge {
      font-size: 10px;
      background: rgba(0, 255, 135, 0.12);
      color: var(--accent-green);
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid rgba(0, 255, 135, 0.3);
      font-family: var(--font-mono);
      font-weight: 500;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      color: #CBD5E1;
      font-size: 14px;
      font-weight: 500;
    }
    .nav-links a:hover {
      color: var(--accent-green);
    }
    .btn-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--accent-green);
      color: #05080A;
      box-shadow: 0 4px 14px rgba(0, 255, 135, 0.25);
    }
    .btn-primary:hover {
      background: #15ff93;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 255, 135, 0.4);
    }
    .btn-outline {
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFF;
      background: transparent;
    }
    .btn-outline:hover {
      border-color: var(--accent-green);
      color: var(--accent-green);
      background: rgba(0, 255, 135, 0.05);
    }
    
    .section-block {
      padding: 96px 0;
      position: relative;
    }
    .section-alt {
      background: #091016;
    }
    .section-darker {
      background: #05080A;
    }
    .section-header {
      max-width: 820px;
      margin-bottom: 56px;
    }
    .section-header.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-eyebrow {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--accent-green);
      margin-bottom: 12px;
      background: rgba(0, 255, 135, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(0, 255, 135, 0.2);
    }
    .section-title {
      font-size: 34px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .hero-section {
      padding: 80px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 255, 135, 0.06), transparent 45%),
                  radial-gradient(circle at 10% 80%, rgba(255, 94, 58, 0.04), transparent 50%),
                  #0B131A;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-roadmap-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: 30px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      font-size: 13px;
      color: #CBD5E1;
      margin-bottom: 24px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent-green);
    }
    .hero-h1 {
      font-size: 46px;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      max-width: 960px;
    }
    .hero-h1 span {
      color: var(--accent-green);
    }
    .hero-summary {
      font-size: 16px;
      color: #94A3B8;
      max-width: 860px;
      line-height: 1.85;
      margin-bottom: 36px;
    }
    .roadmap-timeline-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin: 40px 0 32px;
    }
    .timeline-title {
      font-size: 13px;
      font-family: var(--font-mono);
      color: var(--accent-green);
      margin-bottom: 16px;
      display: flex;
      justify-content: space-between;
    }
    .timeline-nodes {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .timeline-node {
      padding: 16px;
      background: rgba(255, 255, 255, 0.02);
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }
    .timeline-node.active {
      border-color: rgba(0, 255, 135, 0.4);
      background: rgba(0, 255, 135, 0.03);
    }
    .node-tag {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--accent-green);
      margin-bottom: 6px;
    }
    .node-h {
      font-size: 14px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 6px;
    }
    .node-p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .hero-subscribe-bar {
      display: flex;
      gap: 12px;
      max-width: 580px;
      margin-top: 24px;
    }
    .hero-subscribe-bar input {
      flex: 1;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: #FFF;
      font-size: 14px;
    }
    .hero-subscribe-bar input:focus {
      outline: none;
      border-color: var(--accent-green);
    }

    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.25s ease;
    }
    .pain-card:hover {
      border-color: rgba(255, 94, 58, 0.4);
      transform: translateY(-3px);
    }
    .pain-num {
      font-family: var(--font-mono);
      font-size: 20px;
      font-weight: 700;
      color: var(--accent-orange);
      margin-bottom: 12px;
    }
    .pain-title {
      font-size: 18px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 10px;
    }
    .pain-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .sol-showcase {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .sol-visual {
      position: relative;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .sol-visual img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .sol-visual-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 20px;
      background: linear-gradient(to top, rgba(11, 19, 26, 0.95), transparent);
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
    }
    .sol-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .sol-item {
      padding: 18px 22px;
      background: var(--bg-card);
      border-radius: 10px;
      border: 1px solid var(--border-color);
    }
    .sol-item h3 {
      font-size: 17px;
      color: #FFF;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .sol-item p {
      font-size: 13.5px;
      color: var(--text-muted);
    }

    .adv-grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s ease;
      position: relative;
    }
    .adv-card:hover {
      border-color: var(--border-highlight);
      background: var(--bg-card-hover);
      transform: translateY(-4px);
    }
    .adv-badge {
      display: inline-block;
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--accent-green);
      background: rgba(0, 255, 135, 0.08);
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 14px;
    }
    .adv-h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: #FFF;
    }
    .adv-desc {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .metrics-bar-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #080D12;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 36px 30px;
    }
    .metric-col {
      border-right: 1px solid rgba(255, 255, 255, 0.06);
      padding-right: 20px;
    }
    .metric-col:last-child {
      border-right: none;
      padding-right: 0;
    }
    .metric-value {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--accent-green);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    .demo-bento {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 28px;
    }
    .bento-main {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .bento-main-img {
      height: 320px;
      object-fit: cover;
      width: 100%;
    }
    .bento-main-content {
      padding: 30px;
    }
    .bento-side {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .bento-side-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      flex: 1;
    }

    .pipeline-flex {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .pipeline-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .step-badge {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent-green);
      margin-bottom: 10px;
    }

    .trust-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .trust-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
    }
    .trust-quote {
      font-size: 14px;
      color: #E2E8F0;
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .trust-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .trust-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #1C3342;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent-green);
      font-size: 14px;
    }
    .trust-info h4 {
      font-size: 14px;
      color: #FFF;
    }
    .trust-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .news-card:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 255, 135, 0.3);
    }
    .news-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .news-content {
      padding: 22px;
    }
    .news-tag {
      font-size: 11px;
      color: var(--accent-green);
      font-family: var(--font-mono);
      margin-bottom: 8px;
    }
    .news-h3 {
      font-size: 16px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pricing-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 36px 28px;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .pricing-card.featured {
      border-color: var(--accent-green);
      background: #112836;
      box-shadow: 0 10px 30px rgba(0, 255, 135, 0.08);
    }
    .pricing-badge {
      position: absolute;
      top: -12px;
      left: 28px;
      background: var(--accent-green);
      color: #05080A;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
    }
    .pricing-name {
      font-size: 20px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 8px;
    }
    .pricing-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 38px;
    }
    .pricing-features {
      list-style: none;
      margin-bottom: 32px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 13.5px;
      color: #CBD5E1;
    }
    .pricing-features li {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .check-icon {
      color: var(--accent-green);
      font-weight: bold;
    }

    .guarantee-bar {
      background: #080E14;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
    }
    .guarantee-items {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .guarantee-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: rgba(0, 255, 135, 0.1);
      color: var(--accent-green);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }
    .guarantee-item h4 {
      font-size: 15px;
      color: #FFF;
      margin-bottom: 4px;
    }
    .guarantee-item p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .cta-container {
      background: radial-gradient(circle at 100% 50%, rgba(0, 255, 135, 0.08), transparent 60%),
                  var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 56px 48px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      background: rgba(5, 8, 10, 0.6);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: #FFF;
      font-size: 14px;
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--accent-green);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .site-footer {
      background: #05080A;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 30px;
      font-size: 13.5px;
      color: var(--text-muted);
    }
    .footer-cols {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      font-size: 15px;
      color: #FFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent-green);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
    }

    @media (max-width: 1024px) {
      .adv-grid-6, .pain-grid, .news-grid, .pricing-grid, .trust-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .sol-showcase, .cta-container, .demo-bento {
        grid-template-columns: 1fr;
      }
      .timeline-nodes, .metrics-bar-wrap, .pipeline-flex, .guarantee-items {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-cols {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .adv-grid-6, .pain-grid, .news-grid, .pricing-grid, .trust-grid, .timeline-nodes, .metrics-bar-wrap, .pipeline-flex, .guarantee-items {
        grid-template-columns: 1fr;
      }
      .nav-links { display: none; }
      .hero-subscribe-bar { flex-direction: column; }
      .form-row { grid-template-columns: 1fr; }
      .footer-cols { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
      .topbar-left { display: none; }
    }