/* roulang page: index */
:root {
      --bg-dark: #0B0F19;
      --bg-card: rgba(17, 24, 39, 0.72);
      --primary: #2563EB;
      --primary-light: #3B82F6;
      --cyan-glow: #06B6D4;
      --indigo-glow: #6366F1;
      --border-line: rgba(255, 255, 255, 0.08);
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      line-height: 1.68;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-line);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    }
    .glass-card:hover {
      border-color: rgba(59, 130, 246, 0.35);
      box-shadow: 0 15px 35px -5px rgba(37, 99, 235, 0.15);
    }
    .glow-btn {
      background: linear-gradient(135deg, #06B6D4 0%, #2563EB 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glow-btn:hover {
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.55);
      transform: translateY(-1px);
    }
    .glow-btn-secondary {
      background: rgba(30, 41, 59, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.15);
      transition: all 0.3s ease;
    }
    .glow-btn-secondary:hover {
      background: rgba(51, 65, 85, 0.9);
      border-color: var(--cyan-glow);
      color: #fff;
    }
    .section-separator {
      position: relative;
    }
    .section-separator::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 10%;
      right: 10%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.25), transparent);
    }
    .live-dot {
      animation: pulseDot 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }