/* roulang page: index */
:root {
      --primary: #2563EB;
      --primary-dark: #1E40AF;
      --accent: #06B6D4;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-soft: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 8px 12px -6px rgba(0, 0, 0, 0.02);
      --shadow-hover: 0 20px 35px -10px rgba(37, 99, 235, 0.12), 0 10px 15px -5px rgba(0, 0, 0, 0.04);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.6;
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .hero-gold-badge {
      background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(217, 119, 6, 0.05) 100%);
      border: 1px solid rgba(245, 158, 11, 0.35);
      color: #D97706;
    }
    .card-modern {
      background: #FFFFFF;
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-soft);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-modern:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(37, 99, 235, 0.35);
    }
    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 0.825rem;
      font-weight: 600;
      background: rgba(37, 99, 235, 0.08);
      color: var(--primary);
    }
    .btn-gradient {
      background: linear-gradient(135deg, #2563EB 0%, #4F46E5 100%);
      color: #FFFFFF;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }
    .btn-gradient:hover {
      background: linear-gradient(135deg, #1D4ED8 0%, #4338CA 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
    }
    .btn-outline {
      border: 1.5px solid rgba(203, 213, 225, 0.8);
      background: #FFFFFF;
      color: #334155;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: all 0.2s ease;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(37, 99, 235, 0.02);
    }
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    details summary::-webkit-details-marker {
      display: none;
    }