/* roulang page: index */
:root {
      --primary: #1d4ed8;
      --primary-light: #2563eb;
      --secondary: #06b6d4;
      --accent: #f97316;
      --bg-light: #f8fafc;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      color: var(--text-main);
      background-color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .clip-slanted {
      clip-path: polygon(0 0, 100% 0, 100% calc(100% - 3.5rem), 0 100%);
    }
    .stage-perspective {
      perspective: 1000px;
    }
    .stage-card {
      transform: rotateX(4deg) scale(0.98);
      transition: transform 0.4s ease, box-shadow 0.4s ease;
    }
    .stage-card:hover {
      transform: rotateX(0deg) scale(1);
    }