/* roulang page: index */
:root {
      --primary: #0891B2;
      --primary-hover: #0E7490;
      --secondary: #059669;
      --bg-base: #F8FAFC;
      --bg-muted: #F1F5F9;
      --text-main: #0F172A;
      --text-sub: #475569;
      --border-color: #E2E8F0;
      --radius-box: 0.75rem;
      --shadow-clinical: 0 4px 20px -4px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 12px 30px -6px rgba(8, 145, 178, 0.15);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.65;
    }
    .card-hover {
      transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.28s ease;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(8, 145, 178, 0.35);
    }
    .grid-lines {
      background-size: 32px 32px;
      background-image: linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
    }
    .dark-grid-lines {
      background-size: 40px 40px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    }