/* roulang page: index */
:root {
      --brand-primary: #0284c7;
      --brand-teal: #059669;
      --surface-dark: #0f172a;
      --surface-card: #1e293b;
      --surface-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #f8fafc;
      overflow-x: hidden;
    }
    .hero-skew-box {
      clip-path: polygon(0 0, 100% 0, 100% 90%, 0% 100%);
    }
    .badge-protocol {
      background: rgba(14, 165, 233, 0.12);
      border: 1px solid rgba(14, 165, 233, 0.35);
      color: #0284c7;
    }
    .glass-dark {
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .faq-panel {
      transition: max-height 0.3s ease-out, opacity 0.3s ease;
    }