/* roulang page: index */
:root {
      --bg-dark: #060b17;
      --bg-navy: #0b1528;
      --card-bg: rgba(15, 23, 42, 0.72);
      --cyan-highlight: #00e5ff;
      --border-cyan: rgba(0, 229, 255, 0.16);
      --text-muted: #94a3b8;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: #f8fafc;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    /* 玻璃拟态核心类 */
    .glass-panel {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-cyan);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
      border-radius: 16px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-panel:hover {
      border-color: rgba(0, 229, 255, 0.45);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -8px rgba(0, 229, 255, 0.15);
    }
    /* 发光主按钮 */
    .btn-glow-primary {
      background: linear-gradient(135deg, #00e5ff 0%, #0099ff 100%);
      color: #060b17;
      font-weight: 700;
      box-shadow: 0 0 22px rgba(0, 229, 255, 0.45);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-glow-primary:hover {
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.75);
      transform: translateY(-2px);
      color: #020617;
    }
    /* 次级发光线框按钮 */
    .btn-glow-outline {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(0, 229, 255, 0.35);
      color: #e2e8f0;
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-glow-outline:hover {
      border-color: #00e5ff;
      background: rgba(0, 229, 255, 0.1);
      color: #00e5ff;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
    }
    /* 渐变标题文字 */
    .gradient-text-cyan {
      background: linear-gradient(90deg, #ffffff 10%, #00e5ff 60%, #818cf8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-py {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 768px) {
      .section-py {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
    }