/* roulang page: index */
:root {
      --primary-navy: #0f2b48;
      --primary-dark: #0b132b;
      --accent-cyan: #00b4d8;
      --accent-blue: #4361ee;
      --bg-light: #f8fafc;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      letter-spacing: 0.02em;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      overflow-x: hidden;
    }
    .hero-banner-bg {
      background-image: linear-gradient(135deg, rgba(15, 43, 72, 0.94) 0%, rgba(11, 19, 43, 0.96) 100%), url('/assets/images/56e4b8ace614175d.webp');
      background-size: cover;
      background-position: center;
    }
    .dark-section-bg {
      background-image: linear-gradient(180deg, rgba(11, 19, 43, 0.97) 0%, rgba(15, 43, 72, 0.98) 100%), url('/assets/images/21c0ec3f085ae91b.webp');
      background-size: cover;
      background-position: center;
    }
    .cta-banner-bg {
      background-image: linear-gradient(120deg, rgba(15, 43, 72, 0.95) 0%, rgba(67, 97, 238, 0.9) 100%), url('/assets/images/c9c3390b0c9ac1c5.webp');
      background-size: cover;
      background-position: center;
    }
    .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 16px 32px -8px rgba(15, 43, 72, 0.12);
      border-color: var(--accent-cyan);
    }
    .badge-pop {
      animation: pulse 2.5s infinite;
    }
    @keyframes pulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.05); }
    }