/* roulang page: index */
:root {
      --primary-teal: #0F766E;
      --primary-blue: #0284C7;
      --accent-amber: #D97706;
      --bg-light: #F8FAFC;
      --bg-alt: #F1F5F9;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-soft: rgba(226, 232, 240, 0.85);
      --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(2, 132, 199, 0.15), 0 10px 12px -5px rgba(15, 118, 110, 0.1);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.75;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      letter-spacing: -0.02em;
      line-height: 1.35;
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-soft);
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.025em;
    }

    .card-elevated {
      background: #ffffff;
      border: 1px solid var(--border-soft);
      border-radius: 1.25rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .card-elevated:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(2, 132, 199, 0.3);
    }

    .btn-gradient {
      background: linear-gradient(135deg, #0F766E 0%, #0284C7 100%);
      color: #ffffff;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px 0 rgba(2, 132, 199, 0.35);
    }

    .btn-gradient:hover {
      background: linear-gradient(135deg, #115E59 0%, #0369A1 100%);
      box-shadow: 0 6px 20px 0 rgba(2, 132, 199, 0.45);
      transform: translateY(-1px);
    }

    .btn-amber {
      background: linear-gradient(135deg, #D97706 0%, #F59E0B 100%);
      color: #ffffff;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px 0 rgba(217, 119, 6, 0.35);
    }

    .btn-amber:hover {
      background: linear-gradient(135deg, #B45309 0%, #D97706 100%);
      transform: translateY(-1px);
    }

    details summary::-webkit-details-marker {
      display: none;
    }

    .touch-target {
      min-height: 44px;
      min-width: 44px;
    }