/* roulang page: index */
:root {
      --primary: #0F766E;
      --primary-hover: #115E59;
      --primary-light: #F0FDFA;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --card-bg: #FFFFFF;
      --page-bg: #F8FAFC;
    }
    body {
      color: var(--text-main);
      background-color: var(--page-bg);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }
    .shadow-soft {
      box-shadow: 0 4px 20px -2px rgba(15, 118, 110, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
    }
    .shadow-lift {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .shadow-lift:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px -4px rgba(15, 118, 110, 0.12), 0 4px 10px -2px rgba(0, 0, 0, 0.05);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    }
    .accordion-content.active {
      max-height: 500px;
      transition: max-height 0.35s ease-in-out;
    }