/* roulang page: index */
:root {
      --primary-dark: #0F172A;
      --deep-bg: #090D16;
      --accent-cyan: #06B6D4;
      --accent-violet: #6366F1;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --surface-border: #E2E8F0;
      --surface-card: #FFFFFF;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.8;
      color: var(--text-main);
      background-color: #FAFCFF;
      overflow-x: hidden;
    }

    .glass-nav {
      background: rgba(15, 23, 42, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(6, 182, 212, 0.18) 0%, rgba(99, 102, 241, 0.12) 35%, rgba(9, 13, 22, 0) 70%);
    }

    .badge-gradient {
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
      border: 1px solid rgba(6, 182, 212, 0.35);
    }

    .btn-gradient {
      background: linear-gradient(135deg, #06B6D4 0%, #6366F1 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-gradient:hover {
      box-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.4), 0 8px 10px -6px rgba(99, 102, 241, 0.3);
      transform: translateY(-2px);
    }

    .card-modern {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      transition: all 0.3s ease;
    }
    .card-modern:hover {
      border-color: #CBD5E1;
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }

    .comparison-box {
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
    }