/* roulang page: index */
:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --accent: #f97316;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --bg-dark: #0b1320;
    }
    * { box-sizing: border-box; scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.65;
    }
    .card-hover {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -6px rgba(16, 185, 129, 0.16);
    }
    .faq-panel {
      transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
      max-height: 0;
      overflow: hidden;
      opacity: 0;
    }
    .faq-panel.active {
      max-height: 280px;
      opacity: 1;
    }