/* roulang page: index */
:root {
      --primary: #0F52BA;
      --accent: #00A3E0;
      --bg-light: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --dark-navy: #0B192C;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
    }
    .custom-shadow {
      box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(11, 25, 44, 0.94) 0%, rgba(15, 82, 186, 0.88) 100%), url('/assets/images/f67dca80a0421fe4.webp');
      background-size: cover;
      background-position: center;
    }
    .dark-section-bg {
      background-image: linear-gradient(180deg, rgba(11, 25, 44, 0.98) 0%, rgba(11, 25, 44, 0.95) 100%), url('/assets/images/28f0b5e0c1b536d1.webp');
      background-size: cover;
      background-position: center;
    }
    .cta-gradient {
      background: linear-gradient(135deg, #0F52BA 0%, #00A3E0 100%);
    }
    .faq-answer {
      transition: max-height 0.3s ease-out, opacity 0.25s ease;
    }