/* roulang page: index */
:root {
      --bg-dark: #0A0F1D;
      --card-bg: rgba(30, 41, 59, 0.72);
      --border-glow: rgba(0, 242, 254, 0.25);
      --blue-glow: 0 0 25px rgba(0, 102, 255, 0.4);
      --accent-glow: 0 0 30px rgba(0, 242, 254, 0.55);
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glass-panel {
      background: var(--card-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .glass-panel:hover {
      border-color: rgba(0, 242, 254, 0.35);
    }
    .btn-glow-primary {
      background: linear-gradient(135deg, #0066FF 0%, #00F2FE 100%);
      box-shadow: var(--blue-glow);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow-primary:hover {
      box-shadow: var(--accent-glow);
      transform: translateY(-2px);
    }
    .glow-text-cyan {
      color: #00F2FE;
      text-shadow: 0 0 16px rgba(0, 242, 254, 0.45);
    }
    .gradient-hero-bg {
      background: radial-gradient(circle at 50% 20%, rgba(0, 102, 255, 0.18) 0%, rgba(10, 15, 29, 0.98) 75%),
                  url('/assets/images/3594d2255a04ba54.webp') center/cover no-repeat;
    }
    html {
      scroll-behavior: smooth;
    }