/* roulang page: index */
:root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --accent: #f97316;
      --bg-soft: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #64748b;
    }
    body {
      color: var(--text-main);
      background-color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(20, 184, 166, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .accordion-content.open {
      max-height: 320px;
    }
    .accordion-icon {
      transition: transform 0.3s ease;
    }
    .accordion-icon.open {
      transform: rotate(180deg);
    }