/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-dark: #0F2E6A;
      --secondary: #0E9F6E;
      --accent: #6366F1;
      --bg-base: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --card-radius: 16px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 16px 32px -4px rgba(26, 86, 219, 0.12);
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-muted);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .med-card {
      background-color: var(--bg-card);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease-in-out;
    }

    .med-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(26, 86, 219, 0.3);
    }

    .btn-gradient {
      background: linear-gradient(135deg, #1A56DB 0%, #0F2E6A 100%);
      color: #FFFFFF;
      transition: all 0.2s ease;
      box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
    }

    .btn-gradient:hover {
      box-shadow: 0 6px 20px rgba(26, 86, 219, 0.5);
      transform: translateY(-1px);
    }

    .badge-subtle {
      background-color: #EFF6FF;
      color: #1A56DB;
      border: 1px solid #BFDBFE;
    }

    .grid-pattern {
      background-image: radial-gradient(rgba(26, 86, 219, 0.08) 1px, transparent 0);
      background-size: 24px 24px;
    }

    .dark-grid-pattern {
      background-image: radial-gradient(rgba(99, 102, 241, 0.15) 1px, transparent 0);
      background-size: 28px 28px;
    }