/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --primary: #0E7490;
      --primary-dark: #155E75;
      --accent: #10B981;
      --slate-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.8;
      letter-spacing: -0.015em;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    }
    .custom-shadow-hover {
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px -4px rgba(14, 116, 144, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.06);
    }
    .watermark-number {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }