/* roulang page: index */
:root {
      --primary-start: #0052D9;
      --primary-end: #00D4B2;
      --brand-gradient: linear-gradient(135deg, #0052D9 0%, #00D4B2 100%);
      --accent: #FF720D;
      --accent-hover: #E56305;
      --surface-light: #F5F7FA;
      --surface-dark: #0A101D;
      --text-main: #1E293B;
      --text-muted: #475569;
      --text-light: #FFFFFF;
      --card-radius: 20px;
      --card-shadow: 0 10px 30px -10px rgba(0, 82, 217, 0.08);
      --card-border: 1px solid rgba(226, 232, 240, 0.8);
      --transition: all 0.28s ease-in-out;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.6;
      overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; }

    /* Top Bar */
    .top-bar {
      background: #060B14;
      color: #94A3B8;
      font-size: 13px;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-pill {
      display: inline-flex;
      align-items: center;
      background: rgba(0, 212, 178, 0.15);
      color: #00D4B2;
      padding: 2px 10px;
      border-radius: 50rem;
      font-size: 12px;
      font-weight: 600;
    }
    .pulse-dot {
      width: 7px;
      height: 7px;
      background-color: #00D4B2;
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 8px #00D4B2;
    }

    /* Main Navbar */
    .navbar-custom {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
      padding: 14px 0;
    }
    .nav-brand-title {
      font-size: 20px;
      font-weight: 800;
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }
    .nav-link-item {
      color: #334155;
      font-weight: 500;
      margin: 0 10px;
      transition: var(--transition);
      font-size: 15px;
    }
    .nav-link-item:hover { color: var(--primary-start); }
    .btn-header-cta {
      background: var(--accent);
      color: #FFF !important;
      padding: 9px 22px;
      border-radius: 50rem;
      font-size: 14px;
      font-weight: 600;
      border: none;
      box-shadow: 0 4px 14px rgba(255, 114, 13, 0.35);
      transition: var(--transition);
    }
    .btn-header-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

    /* Hero Section */
    .hero-section {
      position: relative;
      background: url('/assets/images/af2d3af61d29db49.png') center/cover no-repeat;
      padding: 85px 0 75px;
      color: #FFFFFF;
    }
    .hero-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(10, 16, 29, 0.95) 0%, rgba(10, 16, 29, 0.82) 55%, rgba(0, 82, 217, 0.6) 100%);
    }
    .hero-content { position: relative; z-index: 2; }
    .hero-h1 {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 16px;
      line-height: 1.7;
      color: #CBD5E1;
      max-width: 620px;
      margin-bottom: 28px;
    }
    .btn-brand-primary {
      background: var(--brand-gradient);
      color: #FFF;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 50rem;
      border: none;
      display: inline-block;
      box-shadow: 0 6px 20px rgba(0, 82, 217, 0.35);
      transition: var(--transition);
    }
    .btn-brand-primary:hover {
      color: #FFF;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 82, 217, 0.45);
    }
    .hero-stage {
      background: rgba(255, 255, 255, 0.06);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--card-radius);
      padding: 24px;
      position: relative;
    }
    .data-pill-floating {
      background: rgba(10, 16, 29, 0.85);
      border: 1px solid #00D4B2;
      border-radius: 50rem;
      padding: 6px 14px;
      font-size: 13px;
      color: #E2E8F0;
      display: inline-flex;
      align-items: center;
      margin-bottom: 12px;
    }

    /* Global Section Styles */
    section { padding: 75px 0; }
    .section-light { background-color: var(--surface-light); }
    .section-white { background-color: #FFFFFF; }
    .section-dark { background-color: var(--surface-dark); color: #FFF; }
    
    .section-header { margin-bottom: 44px; }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: 50rem;
      background: rgba(0, 82, 217, 0.08);
      color: var(--primary-start);
      margin-bottom: 10px;
    }
    .section-tag-light {
      background: rgba(0, 212, 178, 0.15);
      color: #00D4B2;
    }
    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-dark .section-title { color: #FFFFFF; }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }
    .section-dark .section-desc { color: #94A3B8; }

    /* Cards System */
    .heavy-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      box-shadow: var(--card-shadow);
      border: var(--card-border);
      padding: 30px 24px;
      height: 100%;
      position: relative;
      transition: var(--transition);
    }
    .heavy-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -10px rgba(0, 82, 217, 0.15);
    }
    .card-idx {
      position: absolute;
      top: 20px;
      right: 22px;
      font-size: 20px;
      font-weight: 800;
      color: #E2E8F0;
    }
    .heavy-card:hover .card-idx {
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* Product Cards */
    .product-card {
      border: 1px solid #E2E8F0;
      border-radius: var(--card-radius);
      padding: 32px 26px;
      background: #FFF;
      height: 100%;
      transition: var(--transition);
    }
    .product-card.featured {
      border: 2px solid transparent;
      background-image: linear-gradient(#fff, #fff), var(--brand-gradient);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      box-shadow: 0 20px 40px -12px rgba(0, 82, 217, 0.2);
      transform: translateY(-8px);
    }
    .spec-badge {
      display: inline-block;
      font-size: 12px;
      background: #F1F5F9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
      margin-right: 6px;
      margin-bottom: 6px;
    }

    /* Dashboard Metrics Block */
    .metric-box {
      background: #0F172A;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--card-radius);
      padding: 32px 20px;
      text-align: center;
    }
    .metric-value {
      font-size: 38px;
      font-weight: 800;
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: #94A3B8;
    }

    /* Timeline Section */
    .timeline-node {
      border-left: 2px solid #CBD5E1;
      padding-left: 24px;
      position: relative;
      margin-bottom: 30px;
    }
    .timeline-node::before {
      content: '';
      position: absolute;
      left: -7px;
      top: 5px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary-start);
      box-shadow: 0 0 0 4px rgba(0, 82, 217, 0.15);
    }
    .timeline-date {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-start);
      margin-bottom: 4px;
    }

    /* Accordion FAQ */
    .accordion-custom .accordion-item {
      border: var(--card-border);
      border-radius: 12px !important;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-custom .accordion-button {
      font-weight: 600;
      color: var(--text-main);
      padding: 18px 20px;
      background: #FFFFFF;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-start);
      background: #F8FAFC;
      box-shadow: none;
    }
    .accordion-custom .accordion-body {
      color: var(--text-muted);
      font-size: 14.5px;
      line-height: 1.7;
      padding: 16px 20px 22px;
    }

    /* Form Card */
    .cta-card {
      background: linear-gradient(135deg, #0A101D 0%, #06284F 100%);
      border-radius: var(--card-radius);
      padding: 45px 36px;
      color: #FFF;
      box-shadow: 0 24px 50px -15px rgba(0, 0, 0, 0.3);
    }
    .form-control-custom {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFF;
      border-radius: 10px;
      padding: 12px 14px;
      font-size: 14px;
    }
    .form-control-custom:focus {
      background: rgba(255, 255, 255, 0.12);
      border-color: #00D4B2;
      color: #FFF;
      box-shadow: 0 0 0 3px rgba(0, 212, 178, 0.25);
    }
    .form-control-custom option {
      background: #0F172A;
      color: #FFF;
    }

    /* Footer */
    footer {
      background: #060B14;
      color: #94A3B8;
      padding: 60px 0 25px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-title {
      font-size: 16px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 18px;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a:hover { color: #00D4B2; }
    .copyright-bar {
      margin-top: 45px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
      color: #64748B;
    }

    @media (max-width: 991px) {
      .product-card.featured { transform: none; }
      .hero-h1 { font-size: 32px; }
    }
    @media (max-width: 767px) {
      section { padding: 50px 0; }
      .hero-section { padding: 50px 0; }
      .cta-card { padding: 30px 20px; }
    }