/* roulang page: index */
:root {
      --primary: #1A56DB;
      --secondary: #1E293B;
      --accent: #06B6D4;
      --bg-light: #F8FAFC;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 6px -1px rgba(15, 23, 42, 0.03);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
    }
    html {
      scroll-behavior: smooth;
      font-family: Inter, system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: #334155;
      line-height: 1.6;
    }
    .custom-shadow {
      box-shadow: var(--shadow-md);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    }
    .code-accent {
      background: linear-gradient(135deg, rgba(26, 86, 219, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
    }