/* roulang page: index */
:root {
      --primary: #0D52D6;
      --primary-hover: #083896;
      --accent-cyan: #00B4D8;
      --accent-orange: #F77F00;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-light: #F4F7FB;
      --bg-card: #FFFFFF;
      --radius-card: 1rem;
      --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 20px 40px rgba(13, 82, 214, 0.12);
    }
    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: #FFFFFF;
      line-height: 1.6;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: var(--shadow-soft);
    }
    .card-transition {
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-transition:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .tech-border-glow {
      border: 1px solid rgba(13, 82, 214, 0.12);
      transition: border-color 0.3s ease;
    }
    .tech-border-glow:hover {
      border-color: rgba(13, 82, 214, 0.4);
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.94) 0%, rgba(244, 247, 251, 0.9) 100%), url('/assets/images/b6a3dd2f16e1a81b.webp') center/cover no-repeat;
    }
    .dark-topology-bg {
      background: linear-gradient(180deg, #0A1128 0%, #060B1A 100%);
    }
    .status-dot {
      animation: pulseDot 2s infinite;
    }
    @keyframes pulseDot {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.1); }
      100% { opacity: 1; transform: scale(1); }
    }