/* roulang page: index */
:root {
      --primary-color: #1d4ed8;
      --accent-color: #0284c7;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --bg-surface: #f8fafc;
      --border-color: #e2e8f0;
      --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      -webkit-font-smoothing: antialiased;
    }
    .custom-container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .card-elevated {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 0.75rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-elevated:hover {
      box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }
    .badge-soft {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      background-color: #eff6ff;
      color: #1d4ed8;
      border: 1px solid #dbeafe;
    }
    .video-overlay-pattern {
      background: radial-gradient(circle at center, rgba(15, 23, 42, 0.75) 0%, rgba(15, 23, 42, 0.92) 100%);
    }
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }