/* roulang page: index */
:root {
      --primary: #0066FF;
      --cyan: #00D2FF;
      --bg-dark: #0B0F19;
      --card-dark: #111827;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --radius: 1.25rem;
      --shadow-brand: 0 10px 30px -5px rgba(0, 102, 255, 0.08);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: #334155;
      background-color: #F8FAFC;
    }
    .hero-angled {
      clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-angled {
        clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
      }
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.4);
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -5px rgba(0, 102, 255, 0.12);
      border-color: rgba(0, 210, 255, 0.5);
    }
    .faq-collapse {
      transition: max-height 0.35s ease-out, opacity 0.3s ease;
    }