/* roulang page: index */
:root {
      --primary: #1E40AF;
      --accent: #2563EB;
      --cta: #D97706;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-sub: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(30, 64, 175, 0.1), 0 8px 10px -6px rgba(30, 64, 175, 0.05);
    }
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-sub);
      background-color: var(--bg-page);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .custom-container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%);
    }
    .industrial-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .industrial-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }
    .btn-amber {
      background-color: var(--cta);
      color: #FFFFFF;
      transition: all 0.2s ease-in-out;
    }
    .btn-amber:hover {
      background-color: #B45309;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
    }
    .btn-primary-ghost {
      border: 1px solid #BFDBFE;
      color: var(--accent);
      background: #FFFFFF;
      transition: all 0.2s ease-in-out;
    }
    .btn-primary-ghost:hover {
      background: #EFF6FF;
      border-color: var(--accent);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .safe-bottom-padding {
      padding-bottom: calc(4.5rem + env(safe-area-inset-bottom));
    }