/* roulang page: index */
:root {
      --primary: #0D4B56;
      --secondary: #1B8C9E;
      --accent: #2FA378;
      --bg: #F8FAFB;
      --text-title: #122023;
      --text-body: #34464B;
      --text-muted: #687C82;
      --border-color: #E5EBF0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.7;
    }
    section {
      scroll-margin-top: 110px;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(13, 75, 86, 0.06);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 12px 28px -4px rgba(13, 75, 86, 0.12);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }