/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-light: #3B82F6;
      --accent: #F97316;
      --text-main: #0F172A;
      --text-muted: #475569;
      --bg-light: #F8FAFC;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 58, 138, 0.85) 60%, rgba(15, 23, 42, 0.95) 100%);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .badge-glow {
      box-shadow: 0 0 15px rgba(249, 115, 22, 0.35);
    }
    .faq-content {
      transition: max-height 0.3s ease-in-out, opacity 0.3s ease-in-out;
    }