/* roulang page: index */
:root {
      --primary: #0F141C;
      --accent: #00FF88;
      --accent-blue: #3B82F6;
      --bg-light: #F8FAFC;
      --card-border: rgba(226, 232, 240, 0.9);
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
      letter-spacing: -0.01em;
    }
    .num-font {
      font-variant-numeric: tabular-nums;
      font-feature-settings: "tnum";
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
      box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7);
      animation: pulse-ring 2s infinite cubic-bezier(0.66, 0, 0, 1);
    }
    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(0, 255, 136, 0); }
      100% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0); }
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 20%, rgba(59, 130, 246, 0.08) 0%, rgba(0, 255, 136, 0.03) 45%, rgba(255, 255, 255, 0) 70%);
    }
    .code-dark {
      background: #0B0F17;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }