/* roulang page: index */
:root {
      --bg-main: #0B0E14;
      --bg-card: #121721;
      --bg-card-hover: #18202D;
      --brand-blue: #0F2C59;
      --brand-glow: #1E6091;
      --accent-green: #10B981;
      --accent-amber: #F59E0B;
      --text-white: #F9FAFB;
      --text-muted: #9CA3AF;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(30, 96, 145, 0.5);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-white);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .hero-gradient {
      background: radial-gradient(circle at 50% 0%, rgba(30, 96, 145, 0.25) 0%, rgba(15, 44, 89, 0.08) 50%, rgba(11, 14, 20, 0) 100%);
    }
    .custom-border {
      border: 1px solid var(--border-subtle);
    }
    .custom-border-hover:hover {
      border-color: var(--border-focus);
      box-shadow: 0 0 20px rgba(30, 96, 145, 0.15);
    }
    .radar-pulse {
      animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.08); }
    }