/* roulang page: index */
:root {
      --primary: #0f172a;
      --secondary: #1e293b;
      --accent: #d97706;
      --gold: #f59e0b;
      --gold-light: #fef3c7;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --bg-light: #f8fafc;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.75;
    }
    .hero-gold-gradient {
      background: radial-gradient(circle at 50% 20%, #1e293b 0%, #090d16 100%);
    }
    .badge-gold {
      background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%);
      color: #ffffff;
    }
    .card-dark {
      background-color: #111827;
      border: 1px solid rgba(245, 158, 11, 0.2);
    }
    .section-divider {
      border-top: 1px solid #e2e8f0;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .accordion-content.active {
      max-height: 400px;
    }