/* roulang page: index */
:root {
      --bg-dark: #0B0F19;
      --bg-card: #131B2E;
      --border-color: rgba(255, 255, 255, 0.08);
      --primary-cyan: #00F2FE;
      --primary-blue: #4FACFE;
    }
    body {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .text-gradient {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .btn-gradient {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      color: #070A11;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .btn-gradient:hover {
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
      transform: translateY(-2px);
    }
    .tech-card {
      background-color: #111827;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .tech-card:hover {
      border-color: rgba(0, 242, 254, 0.35);
      transform: translateY(-4px);
    }