/* roulang page: index */
:root {
      --primary: #0B1B2B;
      --accent-green: #10B981;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 27, 43, 0.94) 0%, rgba(6, 13, 23, 0.96) 100%), url('/assets/images/f8c6d2f45b4165cb.jpg') center/cover no-repeat;
    }
    .dark-showcase-bg {
      background: linear-gradient(180deg, #060D17 0%, #0B1B2B 100%), url('/assets/images/1ab97b4298129187.jpg') center/cover fixed no-repeat;
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 25px -5px rgba(11, 27, 43, 0.1), 0 8px 10px -6px rgba(11, 27, 43, 0.1);
    }
    .border-glow {
      border: 1px solid rgba(16, 185, 129, 0.2);
    }
    .border-glow:hover {
      border-color: rgba(16, 185, 129, 0.6);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-content.active {
      max-height: 400px;
    }