/* roulang page: index */
:root {
      --primary-color: #1E40AF;
      --accent-color: #0284C7;
      --success-color: #0F766E;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-lg: 1rem;
      --radius-xl: 1.5rem;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.75;
      overflow-x: hidden;
    }
    .clip-slant {
      clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
    }
    @media (max-width: 768px) {
      .clip-slant {
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
      }
    }
    .text-balance {
      text-wrap: balance;
    }
    html {
      scroll-behavior: smooth;
    }