/* roulang page: index */
:root {
      --bg-dark: #0A0D14;
      --panel-bg: rgba(22, 27, 38, 0.85);
      --border-line: rgba(255, 255, 255, 0.08);
      --cyber-glow: 0 0 25px rgba(6, 182, 212, 0.35);
      --purple-glow: 0 0 25px rgba(124, 58, 237, 0.35);
    }
    body {
      background-color: var(--bg-dark);
      color: #F8FAFC;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .panel-box {
      background: var(--panel-bg);
      border: 1px solid var(--border-line);
      backdrop-filter: blur(12px);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .panel-box:hover {
      border-color: rgba(6, 182, 212, 0.35);
      box-shadow: 0 10px 30px -10px rgba(6, 182, 212, 0.2);
      transform: translateY(-3px);
    }
    .cyber-btn {
      background: linear-gradient(135deg, #7C3AED 0%, #06B6D4 100%);
      transition: all 0.3s ease;
    }
    .cyber-btn:hover {
      box-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
      filter: brightness(1.1);
    }
    .text-glow {
      text-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
    }
    .timeline-dot::before {
      content: '';
      position: absolute;
      left: -9px;
      top: 6px;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #06B6D4;
      box-shadow: 0 0 12px #06B6D4;
    }