/* roulang page: index */
:root {
      --primary: #00E676;
      --secondary: #00B0FF;
      --dark-bg: #0F141C;
      --dark-card: #1A2230;
      --light-bg: #F5F7FA;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --radius-base: 14px;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .neon-border:hover {
      box-shadow: 0 10px 25px -5px rgba(0, 230, 118, 0.25);
      border-color: var(--primary);
    }
    .cyber-gradient {
      background: linear-gradient(135deg, rgba(0, 230, 118, 0.12) 0%, rgba(0, 176, 255, 0.08) 100%);
    }
    .hero-bg-overlay {
      background: linear-gradient(90deg, rgba(15, 20, 28, 0.95) 0%, rgba(15, 20, 28, 0.8) 55%, rgba(15, 20, 28, 0.4) 100%);
    }
    .faq-rotate {
      transition: transform 0.25s ease-in-out;
    }