/* roulang page: index */
:root {
      --primary: #0F172A;
      --accent: #2563EB;
      --emerald: #10B981;
      --bg-light: #F8FAFC;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: #334155;
      background-color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei";
      line-height: 1.8;
      overflow-x: hidden;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .transition-all-300 {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }