/* roulang page: index */
:root {
      --primary: #2563eb;
      --secondary: #059669;
      --accent: #d97706;
      --bg-main: #ffffff;
      --bg-alt: #f8fafc;
      --bg-deep: #0f172a;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-light: #e2e8f0;
      --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-main);
      overflow-x: hidden;
      line-height: 1.75;
    }
    .custom-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 1rem;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .dark-card {
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 1rem;
      transition: all 0.3s ease;
    }
    .dark-card:hover {
      border-color: #3b82f6;
      transform: translateY(-3px);
    }