/* roulang page: index */
:root {
      --color-primary: #0A2540;
      --color-cyan: #0EA5E9;
      --color-accent: #10B981;
      --color-dark: #0B1120;
      --color-bg: #F8FAFC;
      --color-ice: #F1F5F9;
      --color-text: #1E293B;
      --color-muted: #475569;
      --shadow-soft: 0 4px 20px -2px rgba(10, 37, 64, 0.06);
      --shadow-hover: 0 10px 25px -4px rgba(14, 165, 233, 0.12);
    }
    body {
      background-color: var(--color-bg);
      color: var(--color-text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: var(--shadow-soft);
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .code-scroll::-webkit-scrollbar {
      height: 4px;
      width: 4px;
    }
    .code-scroll::-webkit-scrollbar-thumb {
      background: #334155;
      border-radius: 4px;
    }