/* roulang page: index */
:root {
      --bg-base: #0d0b18;
      --bg-surface: #161329;
      --bg-card: rgba(26, 22, 48, 0.85);
      --primary: #7928ca;
      --secondary: #0070f3;
      --accent: #00dfd8;
      --warning: #ff4d4d;
      --text-main: #ffffff;
      --text-muted: #a1a1aa;
      --text-dim: #71717a;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 223, 216, 0.35);
      --radius-sm: 12px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-pill: 50px;
      --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
      --shadow-glow: 0 0 25px rgba(121, 40, 202, 0.35);
      --gradient-brand: linear-gradient(135deg, #7928ca 0%, #0070f3 50%, #00dfd8 100%);
      --gradient-btn: linear-gradient(90deg, #7928ca 0%, #0070f3 100%);
    }

    /* Reset & Base */
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      padding-bottom: 75px; /* Space for mobile nav */
    }
    @media (min-width: 992px) {
      body {
        padding-bottom: 0;
      }
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--accent);
    }

    /* Top Announcement Bar */
    .top-bar {
      background: #090710;
      border-bottom: 1px solid var(--border-line);
      font-size: 0.8rem;
      padding: 6px 0;
      color: var(--text-muted);
    }
    .status-beacon {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #00dfd8;
      box-shadow: 0 0 8px #00dfd8;
      margin-right: 6px;
    }

    /* Desktop Navigation */
    .site-nav {
      background: rgba(13, 11, 24, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      position: sticky;
      top: 0;
      z-index: 1020;
      padding: 14px 0;
    }
    .brand-logo {
      font-weight: 800;
      font-size: 1.35rem;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
    }
    .nav-link-custom {
      color: var(--text-muted);
      font-size: 0.92rem;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      transition: all 0.2s;
    }
    .nav-link-custom:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-nav-cta {
      background: var(--gradient-btn);
      color: #fff;
      font-size: 0.88rem;
      font-weight: 600;
      padding: 8px 20px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 4px 15px rgba(121, 40, 202, 0.3);
    }
    .btn-nav-cta:hover {
      color: #fff;
      box-shadow: 0 6px 20px rgba(0, 223, 216, 0.4);
      transform: translateY(-1px);
    }

    /* Custom Mobile Bottom Tab Bar */
    .mobile-tab-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: rgba(16, 13, 29, 0.95);
      backdrop-filter: blur(20px);
      border-top: 1px solid var(--border-line);
      z-index: 1050;
      display: flex;
      justify-content: space-around;
      align-items: center;
      padding: 4px 8px;
    }
    .mobile-tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: var(--text-dim);
      font-size: 0.72rem;
      text-decoration: none;
      min-width: 44px;
      min-height: 44px;
      transition: color 0.2s;
    }
    .mobile-tab-item i {
      font-size: 1.15rem;
      margin-bottom: 2px;
    }
    .mobile-tab-item:active, .mobile-tab-item:hover {
      color: var(--accent);
    }

    /* Custom Typography & Sections */
    section {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background-color: #120f21;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      padding: 4px 14px;
      background: rgba(0, 223, 216, 0.08);
      border: 1px solid rgba(0, 223, 216, 0.25);
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 760px;
      line-height: 1.7;
    }

    /* Cards System */
    .es-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-soft);
      padding: 30px;
      height: 100%;
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .es-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-active);
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 223, 216, 0.15);
    }
    .card-badge {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.07);
      color: var(--accent);
      border: 1px solid var(--border-line);
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* Hero Section */
    .hero-section {
      background: linear-gradient(180deg, #0d0b18 0%, #161329 100%), url('/assets/images/b997a64167948b92.jpg');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      padding: 100px 0 80px 0;
      position: relative;
    }
    .hero-badge-flash {
      background: linear-gradient(90deg, #ff4d4d, #f59e0b);
      color: #fff;
      font-size: 0.82rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 0 15px rgba(255, 77, 77, 0.4);
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      color: #cbd5e1;
      font-size: 1.05rem;
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .btn-hero-primary {
      background: var(--gradient-btn);
      color: #fff;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 6px 25px rgba(121, 40, 202, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 112, 243, 0.5);
    }
    .btn-hero-outline {
      background: rgba(255, 255, 255, 0.05);
      color: #fff;
      font-weight: 600;
      padding: 14px 30px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-line);
      backdrop-filter: blur(10px);
    }
    .btn-hero-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border-color: rgba(255, 255, 255, 0.3);
    }
    .hero-visual-card {
      background: rgba(22, 19, 41, 0.9);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(15px);
    }

    /* Metric Cards */
    .metric-number {
      font-size: 2.3rem;
      font-weight: 800;
      color: #fff;
      letter-spacing: -0.5px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-unit {
      font-size: 1rem;
      font-weight: 500;
      color: var(--accent);
    }

    /* Step Timeline Horizontal */
    .process-step-node {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(121, 40, 202, 0.2);
      border: 2px solid var(--primary);
      color: #fff;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    /* Comparison Table Styling */
    .comp-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
      overflow: hidden;
    }
    .comp-table th, .comp-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-line);
    }
    .comp-table th {
      background: rgba(255, 255, 255, 0.03);
      font-weight: 700;
      color: #fff;
    }
    .comp-table tr:last-child td {
      border-bottom: none;
    }
    .comp-highlight {
      background: rgba(0, 223, 216, 0.04);
      color: var(--accent);
      font-weight: 600;
    }

    /* Accordion FAQ Customization */
    .accordion-item {
      background-color: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-button {
      background-color: transparent;
      color: #fff;
      font-weight: 600;
      font-size: 1.05rem;
      padding: 20px 24px;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(255, 255, 255, 0.03);
      color: var(--accent);
    }
    .accordion-button::after {
      filter: invert(1);
    }
    .accordion-body {
      color: var(--text-muted);
      padding: 10px 24px 24px 24px;
      line-height: 1.7;
    }

    /* Form Card Container */
    .cta-form-container {
      background: linear-gradient(135deg, rgba(22, 19, 41, 0.95) 0%, rgba(35, 17, 65, 0.95) 100%);
      border: 1px solid rgba(121, 40, 202, 0.4);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-glow);
    }
    .form-control-custom, .form-select-custom {
      background: rgba(13, 11, 24, 0.8);
      border: 1px solid var(--border-line);
      color: #fff;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
    }
    .form-control-custom:focus, .form-select-custom:focus {
      background: #0d0b18;
      border-color: var(--accent);
      color: #fff;
      box-shadow: 0 0 10px rgba(0, 223, 216, 0.25);
    }
    .form-control-custom::placeholder {
      color: var(--text-dim);
    }

    /* Footer Styling */
    .site-footer {
      background: #080611;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px 0;
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .footer-heading {
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: -0.3px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .copyright-bar {
      border-top: 1px solid var(--border-line);
      padding-top: 24px;
      margin-top: 50px;
      font-size: 0.85rem;
      color: var(--text-dim);
    }