/* roulang page: index */
:root {
        --primary: #0F52BA;
        --emerald: #00C288;
        --accent: #FF5E14;
        --dark-bg: #0A0F1D;
        --light-bg: #F8FAFC;
        --text-main: #0F172A;
        --text-sub: #334155;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
        color: var(--text-main);
        background-color: var(--light-bg);
        line-height: 1.75;
      }
      .glass-nav {
        background: rgba(10, 15, 29, 0.85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
      }
      .hero-gradient {
        background: linear-gradient(135deg, rgba(10, 15, 29, 0.94) 0%, rgba(15, 82, 186, 0.82) 100%);
      }
      .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 12px 28px -6px rgba(15, 82, 186, 0.15);
      }
      .accordion-content {
        transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
      }
      .accordion-content.active {
        max-height: 350px;
        opacity: 1;
      }