/* roulang page: index */
:root {
      --bg-main: #070b19;
      --bg-sub: #0b132b;
      --bg-glow: #1c2541;
      --primary: #3a86ff;
      --secondary: #00f5d4;
      --accent-purple: #7209b7;
      --text-main: #ffffff;
      --text-muted: #94a3b8;
      --border-glass: rgba(255, 255, 255, 0.08);
      --glass-card: rgba(15, 23, 42, 0.65);
    }

    body {
      background-color: var(--bg-main);
      color: #e0e1dd;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }

    .glass-panel {
      background: var(--glass-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    }

    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card-hover:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 245, 212, 0.3);
      box-shadow: 0 15px 30px -10px rgba(58, 134, 255, 0.25);
    }

    .btn-glow {
      background: linear-gradient(135deg, #3a86ff 0%, #00f5d4 100%);
      color: #070b19;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 25px rgba(0, 245, 212, 0.45);
      transform: scale(1.02);
    }

    .gradient-text {
      background: linear-gradient(135deg, #ffffff 30%, #00f5d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .gradient-text-blue {
      background: linear-gradient(135deg, #3a86ff 0%, #00f5d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .tech-grid-bg {
      background-image: radial-gradient(rgba(58, 134, 255, 0.12) 1px, transparent 1px);
      background-size: 32px 32px;
    }