/* roulang page: index */
:root {
      --primary: #059669;
      --primary-dark: #047857;
      --secondary: #2563EB;
      --accent: #F59E0B;
      --bg-light: #F8FAFC;
      --dark-slate: #0F172A;
      --card-border: rgba(226, 232, 240, 0.85);
      --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05);
      --card-hover-shadow: 0 20px 30px -10px rgba(5, 150, 105, 0.16);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-light);
      color: #334155;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    .custom-gradient-btn {
      background: linear-gradient(135deg, #059669 0%, #2563EB 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-gradient-btn:hover {
      box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.35);
      transform: translateY(-2px);
    }
    .accent-badge {
      background: rgba(5, 150, 105, 0.08);
      border: 1px solid rgba(5, 150, 105, 0.25);
      color: #059669;
    }
    .feature-card {
      border-radius: 1.5rem;
      border: 1px solid var(--card-border);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      background: #FFFFFF;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(5, 150, 105, 0.3);
    }
    .hero-banner-mask {
      background: linear-gradient(105deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.84) 50%, rgba(37, 99, 235, 0.72) 100%);
    }
    details summary::-webkit-details-marker {
      display: none;
    }